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Contents
- The climate of Ballwin
- The best time to visit Ballwin
- The worst time to visit Ballwin
- Spring weather in Ballwin
- Summer weather in Ballwin
- Autumn weather in Ballwin
- Winter weather in Ballwin
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The climate of Ballwin
The city of Ballwin, Missouri, USA, is categorized under the Köppen climate classification as Cfa, which stands for Humid subtropical, with no distinct dry season. Positioned in the midwestern section of the United States, Ballwin exhibits diverse weather phenomena that change with the seasons.
Throughout the year, Ballwin experiences significant fluctuations in weather parameters. Average highs range from 38.5°F (3.6°C) in the colder months to 88.2°F (31.2°C) during summer peak, indicating a well-defined seasonal temperature range. Lowest temperatures are observed to swing between 24.6°F (-4.1°C) in colder periods to 69.3°F (20.7°C) in warmer segments. Notably, summer isn't the only season affecting humidity levels. A slight increase to 78% occurs in May, while the values remain comparatively uniform throughout the rest of the year, averaging around 75%.
Rainfalls are a common occurrence across all months, with abundant precipitation that varies from 1.1" (28mm) to 3.03" (77mm). While all months witness wet days, numbers peak in May with 16.3 rainfall reported days. Snowfalls, on the other hand, become evident only in three months: January, March, and December, featuring 1.14" (29mm), 0.47" (12mm), and 1.3" (33mm), respectively. With respect to wind, speeds change mildly throughout the year, generally standing between 5.3mph (8.5km/h) to 8.8mph (14.2km/h) with the maximum wind gust recorded at 13.7mph (22km/h).
Throughout the year, Ballwin experiences significant fluctuations in weather parameters. Average highs range from 38.5°F (3.6°C) in the colder months to 88.2°F (31.2°C) during summer peak, indicating a well-defined seasonal temperature range. Lowest temperatures are observed to swing between 24.6°F (-4.1°C) in colder periods to 69.3°F (20.7°C) in warmer segments. Notably, summer isn't the only season affecting humidity levels. A slight increase to 78% occurs in May, while the values remain comparatively uniform throughout the rest of the year, averaging around 75%.
Rainfalls are a common occurrence across all months, with abundant precipitation that varies from 1.1" (28mm) to 3.03" (77mm). While all months witness wet days, numbers peak in May with 16.3 rainfall reported days. Snowfalls, on the other hand, become evident only in three months: January, March, and December, featuring 1.14" (29mm), 0.47" (12mm), and 1.3" (33mm), respectively. With respect to wind, speeds change mildly throughout the year, generally standing between 5.3mph (8.5km/h) to 8.8mph (14.2km/h) with the maximum wind gust recorded at 13.7mph (22km/h).
The best time to visit Ballwin
Based on the climatological data, ideal times for visits fall between the months of May and September. Days are longer, providing approximately 14.3 hours to 14.8 hours of daylight, coupled with sunshine durations extending over an average of 9.4 hours to 10.4 hours. Temperatures remain comfortable with highs from 75.7°F (24.3°C) to 88.2°F (31.2°C) and lows from 57.4°F (14.1°C) to 69.3°F (20.7°C). Relative humidity ranges from 75% to 78% offering a pleasant atmosphere. Rainfall is scattered across these months, but never exceeding 3.03" (77mm), making weather disruptions minimal.
The worst time to visit Ballwin
Visits during winter, particularly between December and February, can be challenging due to low temperatures. Highs crawl from 38.5°F (3.6°C) to 43°F (6.1°C) and lows drop further from 24.6°F (-4.1°C) to 28°F (-2.2°C). These months also experience lesser daylight, summing up to an average of 10.1 hours to 10.8 hours, with reduced sunshine durations, about 4.6 hours to 4.8 hours per day. In addition, January and December also feature apparent snowfall measures.
Spring weather in Ballwin
March to May mark the spring months in Ballwin. Weather during this period is marked by increasing temperatures, with highs moving from 54.9°F (12.7°C) to 75.7°F (24.3°C) and lows ascending between 38.1°F (3.4°C) to 57.4°F (14.1°C). The number of rainy days also rise, reaching the highest in May at 16.3 days with 3.03" (77mm) rainfall. Humidity peaks to 78% in May.
Summer weather in Ballwin
The summer months, between June and August, exhibit predominantly clear skies and warm temperatures. Highest temperatures shift from 85.3°F (29.6°C) to 88.2°F (31.2°C) while lowest temperatures vary from 66.4°F (19.1°C) to 69.3°F (20.7°C). Average rainfall decreases slightly, ranging from 2.4" (61mm) to 2.68" (68mm). June provides the longest daylight hours, clocking an average of 14.8 hours.
Autumn weather in Ballwin
Autumn in Ballwin goes from September to November. Temperatures start to decrease with highs shifting from 80.1°F (26.7°C) to 53.8°F (12.1°C) and lows standing between 59.9°F (15.5°C) to 37.9°F (3.3°C). Rainfall remains above 1 inch in all months, with September experiencing the lowest of the season at 1.73" (44mm).
Winter weather in Ballwin
Winter in Ballwin, from December through February, is characterized by the lowest temperatures and shortest daylight hours. High temperatures seldom exceed from 38.5°F (3.6°C) to 43°F (6.1°C) and lows range between 24.6°F (-4.1°C) to 28°F (-2.2°C). December and January witness snowfalls of 1.3" (33mm) and 1.14" (29mm) respectively. Daylight hours are restricted to 9.5 hours to 10.8 hours, with sunshine duration at its lowest from 4.6 hours to 4.8 hours.
Weather in January
The year in Ballwin, Missouri starts off with chilly conditions and a temperature ranging from 24.6°F (-4.1°C) to 38.5°F (3.6°C). The winter weather finds residents bracing themselves for the biting cold with moderate levels of snowfall. Weather in January »
Weather in February
The last month of the winter, February, is a chilly month in Ballwin, Missouri, with an average temperature ranging between max 43°F (6.1°C) and min 28°F (-2.2°C). At the onset of February, Ballwin records an average high-temperature of a frosty 43°F (6.1°C), showing little deviation from the preceding month. Weather in February »
Weather in March
March, the first month of the spring in Ballwin, is a fresh month, with an average temperature fluctuating between 54.9°F (12.7°C) and 38.1°F (3.4°C). With the transition into March, Ballwin experiences an increase in average high-temperatures, moving up from a frosty 43°F (6.1°C) in February to a cool 54.9°F (12.7°C). Weather in March »
Weather in April
Ballwin in April sees a consistent rise in temperatures from March, with records spanning from 47.8°F (8.8°C) to 65.8°F (18.8°C). Spring is well and alive, casting long shadows with extended daylight hours and high sunshine hours. Weather in April »
Weather in May
May signals the onset of the warmer season in Ballwin, with the highest temperature jumping to 75.7°F (24.3°C). The warmer weather paints longer, sunnier days, promoting more outdoor activities. This period is very conducive for agricultural activities with minimal disturbances from rainfall. Weather in May »
Weather in June
June ushers in the beginning of the summer season in Ballwin. The city is characterized by hot temperatures, reaching up to 85.3°F (29.6°C). The city comes alive with lush greenery, outdoor festivals, and recreational activities amplified by the long, sunlit days. Weather in June »
Weather in July
July sees the warmest weather in Ballwin with the highest temperature hitting 88.2°F (31.2°C). Despite the high heat, the city continues to buzz both day and night as locals and tourists alike enjoy the lasting daylight hours. Emphasising sun protection becomes essential, taking into consideration the high UV index. Weather in July »
Weather in August
August introduces a slight downturn in temperature, dropping to 86.5°F (30.3°C) from the July high of 88.2°F (31.2°C). The weather remains predominantly warm and humid, common during late summer. Frequent thunderstorms and heavy rainfall events can occasionally interrupt the typical August day. Weather in August »
Weather in September
September in Ballwin sees a distinct drop in temperature from August, ranging between 59.9°F (15.5°C) and 80.1°F (26.7°C). The early signs of autumn are evident as the humidity levels start to drop. The city's landscapes begin their transformation into captivating hues of deep reds, oranges, and yellows. Weather in September »
Weather in October
October continues the temperature descent, recording lows and highs from 48.9°F (9.4°C) to 66.6°F (19.2°C). Autumn is fully underway, presenting mesmerizing fall foliage across the city. The drop in temperature calls for warm attire and layering, especially towards the end of the month. Weather in October »
Weather in November
November ushers in the early stages of winter with colder weather, having temperatures spanning from 37.9°F (3.3°C) to 53.8°F (12.1°C). This is a stark change from the balminess experienced in October. The first frost is not an uncommon sight, reminding residents to prepare for the fast-approaching winter. Weather in November »
Weather in December
Concluding the year, December in Ballwin is hallmarked by the cold winter weather, ranging in temperatures from 30.2°F (-1°C) to 43.3°F (6.3°C). The landscapes become dormant and white with snow, coating the city in a winter wonderland aesthetic. Weather in December »
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year in Ballwin?
January tends to be the coldest month in Ballwin, Missouri, with temperatures averaging a daily high of 38.5°F (3.6°C) and a low of 24.6°F (-4.1°C).
How much does it rain in Ballwin?
Throughout the year, in Ballwin, Missouri, there are 134.1 rainfall days, and 23.82" (605mm) of precipitation is accumulated.
When does it snow in Ballwin?
Months with snowfall in Ballwin, Missouri, are January through March, November and December.
How much does it snow in Ballwin?
Throughout the year, there are 19.5 snowfall days, and 4.29" (109mm) of snow is accumulated.
What is the month with the least sunshine in Ballwin?
With an average of 4.6h of sunshine, January has the least sunshine of the year in Ballwin, Missouri.
What is the month with the lowest UV index in Ballwin?
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Ballwin, Missouri.
What is the driest month in Ballwin?
February is the month with the least rainfall in Ballwin, Missouri. Rain falls for 6.7 days and accumulates 1.1" (28mm) of precipitation.
When is Daylight Saving Time (DST) in Ballwin?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
When it does not snow in Ballwin?
April through October are months without snowfall in Ballwin.
What is the most humid month in Ballwin?
The most humid month in Ballwin, Missouri, is May, with an average relative humidity of 78%.
What is the rainiest month in Ballwin?
May is the month with the most rainfall in Ballwin, Missouri. Rain falls for 16.3 days and accumulates 3.03" (77mm) of precipitation.
When are the longest days in Ballwin?
The month with the longest days in Ballwin, Missouri, is June, with an average of 14h and 48min of daylight.
What part of the year is the hottest in Ballwin?
July tends to be the warmest month, with temperatures averaging a daily high of 88.2°F (31.2°C) and a low of 69.3°F (20.7°C).
What month has the most sunshine in Ballwin?
The month with the most sunshine is July, with an average of 10.4h of sunshine.
What is the month with the highest UV index in Ballwin?
With an average maximum UV index of 7, July is the month with the highest UV index in Ballwin.
What is the least humid month in Ballwin?
The least humid month in Ballwin, Missouri, is October, with an average relative humidity of 71%.
What is the snowiest month in Ballwin?
December is the month with the most snowfall in Ballwin, Missouri. Snow falls for 4.1 days and accumulates 1.3" (33mm) of snow.
What is the month with the shortest days in Ballwin?
December has the shortest days of the year in Ballwin, with an average of 9h and 30min of daylight.
Average temperature
Ballwin, MO
The warmest month (with the highest average high temperature) is July (88.2°F).
The month with the lowest average high temperature is January (38.5°F).
The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).
Average pressure
Ballwin, MO
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Ballwin, MO
- Average wind speed in January:
8.8mph - Average wind speed in February:
8.6mph - Average wind speed in March:
8.5mph - Average wind speed in April:
8.5mph - Average wind speed in May:
6.9mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
5.3mph - Average wind speed in August:
5.3mph - Average wind speed in September:
5.7mph - Average wind speed in October:
7.2mph - Average wind speed in November:
7.9mph - Average wind speed in December:
8.1mph
The windiest month (with the highest average wind speed) is January (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity
Ballwin, MO
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Ballwin, MO
- Average rainfall in January:
1.26" - Average rainfall in February:
1.1" - Average rainfall in March:
1.65" - Average rainfall in April:
2.6" - Average rainfall in May:
3.03" - Average rainfall in June:
2.56"
- Average rainfall in July:
2.4" - Average rainfall in August:
2.68" - Average rainfall in September:
1.73" - Average rainfall in October:
2.13" - Average rainfall in November:
1.26" - Average rainfall in December:
1.42"
The wettest month (with the highest rainfall) is May (3.03").
The driest month (with the least rainfall) is February (1.1").
Average rainfall days
Ballwin, MO
- Average rainfall days in January:
6.3 days - Average rainfall days in February:
6.7 days - Average rainfall days in March:
12.3 days - Average rainfall days in April:
13.3 days - Average rainfall days in May:
16.3 days - Average rainfall days in June:
13.8 days
- Average rainfall days in July:
15.7 days - Average rainfall days in August:
13.8 days - Average rainfall days in September:
11.6 days - Average rainfall days in October:
10.1 days - Average rainfall days in November:
8.1 days - Average rainfall days in December:
6.1 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is December (6.1 days).
Average snowfall
Ballwin, MO
The month with the highest snowfall is December (1.3").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Ballwin, MO
- Average snowfall days in January:
6.4 days - Average snowfall days in February:
5.3 days - Average snowfall days in March:
2 days - Average snowfall days in April:
0.1 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0.1 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
1.4 days - Average snowfall days in December:
4.1 days
The month with the highest number of snowfall days is January (6.4 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight / Average sunshine
Ballwin, MO
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 2min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 3min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 1min - Average daylight in December:
9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
4h and 4min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 2min - Average sunshine in May:
9h and 2min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
10h and 1min - Average sunshine in September:
9h and 2min - Average sunshine in October:
6h and 0min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days
Ballwin, MO
- Average sunshine days in January:
20.1 days - Average sunshine days in February:
16.9 days - Average sunshine days in March:
15.9 days - Average sunshine days in April:
15.6 days - Average sunshine days in May:
12.6 days - Average sunshine days in June:
12.8 days
- Average sunshine days in July:
13 days - Average sunshine days in August:
14.3 days - Average sunshine days in September:
16.9 days - Average sunshine days in October:
19.5 days - Average sunshine days in November:
19.8 days - Average sunshine days in December:
20.3 days
The month with the most sunshine days is December (20.3 days).
The month with the least sunshine days is May (12.6 days).
Average UV index
Ballwin, MO
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover
Ballwin, MO
The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are June, July and August (Cloud cover 29).
Average visibility
Ballwin, MO
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Ballwin, Missouri, USA
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