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Contents
- 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
Weather in January
January, like December, in Arnold, Missouri, is a wintry winter month, with an average temperature varying between 37.9°F (3.3°C) and 25°F (-3.9°C). January, having an average high-temperature of 37.9°F (3.3°C) and an average low-temperature of 25°F (-3.9°C), is the coldest month. Weather in January »
Weather in February
February, the last month of the winter in Arnold, is also a wintry month, with an average temperature fluctuating between 28.4°F (-2°C) and 42.6°F (5.9°C). The transition into February shows a subtle variation to a still cold 42.6°F (5.9°C) from January's 37.9°F (3.3°C) in the average high-temperature. Weather in February »
Weather in March
March, the first month of the spring in Arnold, is a cool month, with an average temperature varying between 54.5°F (12.5°C) and 38.1°F (3.4°C). March shows a rise in the average high-temperature, moving from February's cold 42.6°F (5.9°C) to a fresh 54.5°F (12.5°C). Weather in March »
Weather in April
April is a refreshing spring month in Arnold, Missouri, with an average temperature fluctuating between 65.7°F (18.7°C) and 48°F (8.9°C). Entering April, Arnold sees a temperature rise, with the average high-temperature advancing from March's fresh 54.5°F (12.5°C) to an enjoyable 65.7°F (18.7°C). Weather in April »
Weather in May
The last month of the spring, May, is a warm month in Arnold, Missouri, with an average temperature ranging between min 57.7°F (14.3°C) and max 75.4°F (24.1°C). The start of May signals an increase in the average high-temperature, moving from a refreshing 65.7°F (18.7°C) in April to a moderately hot 75.4°F (24.1°C). Weather in May »
Weather in June
June, the first month of the summer in Arnold, is still a warm month, with an average temperature ranging between max 84°F (28.9°C) and min 66.7°F (19.3°C). As June arrives, a slight rise in the average high-temperature is observed, moving from 75.4°F (24.1°C) in May to a still warm 84°F (28.9°C). Weather in June »
Weather in July
July in Arnold, Missouri, is a hot summer month, with an average temperature varying between 86.9°F (30.5°C) and 69.3°F (20.7°C). July is the warmest month, exhibiting average temperatures of 86.9°F (30.5°C) at the peak and 69.3°F (20.7°C) at the base. For July, the heat index is appraised at a sweltering 100.4°F (38°C). Weather in July »
Weather in August
August, the last month of the summer in Arnold, is also a moderately hot month, with an average temperature fluctuating between 66.9°F (19.4°C) and 85.6°F (29.8°C). In August, Arnold notes an average high-temperature of a moderately hot 85.6°F (29.8°C), hardly different from the preceding month. Weather in August »
Weather in September
September, the first month of the autumn in Arnold, is still a warm month, with an average temperature fluctuating between 79.7°F (26.5°C) and 59.9°F (15.5°C). Arnold observes a small decrease in the average high-temperature with the arrival of September, falling from August's 85.6°F (29.8°C) to a still warm 79.7°F (26.5°C). Weather in September »
Weather in October
October, the same as September, is another refreshing autumn month in Arnold, Missouri, with an average temperature varying between 49.1°F (9.5°C) and 66.4°F (19.1°C). With October's arrival, Arnold sees a decrease in average high-temperatures, moving from a warm 79.7°F (26.5°C) in September to a comfortable 66.4°F (19.1°C). Weather in October »
Weather in November
November, the last month of the autumn in Arnold, is also a fresh month, with an average temperature ranging between min 37.9°F (3.3°C) and max 53.8°F (12.1°C). November's arrival coincides with a drop in the average high-temperature, decreasing from October's enjoyable 66.4°F (19.1°C) to a cool 53.8°F (12.1°C). Weather in November »
Weather in December
December, the first month of the winter in Arnold, is still a chilly month, with an average temperature fluctuating between 30.7°F (-0.7°C) and 43.2°F (6.2°C). December's arrival corresponds with a decrease in average high-temperatures, from November's fresh 53.8°F (12.1°C) to a frosty 43.2°F (6.2°C). Weather in December »
Updated: Aug 14, 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 part of the year is the coldest?
January, characterized by an average high temperature of 37.9°F (3.3°C) and a low temperature of 25°F (-3.9°C), is generally the coldest month.
How much does it rain?
In Arnold, Missouri, during the entire year, the rain falls for 146.1 days and collects up to 32.36" (822mm) of precipitation.
When does it snow?
January through March, November and December are months with snowfall in Arnold.
How many days does it snow?
Throughout the year, there are 15.3 snowfall days, and 8.27" (210mm) of snow is accumulated.
What is the month with the least sunshine?
With an average of 4.5h of sunshine, January has the least sunshine of the year.
When is the lowest UV index?
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index.
What is the driest month?
February and November are months with the least rain when the rain falls for 6.8 days and typically aggregates up to 1.77" (45mm) of rain.
When does it snow the most?
The month with the most snowfall is February, when snow falls for 4.8 days and typically aggregates up to 2.6" (66mm) of snow.
When is Daylight Saving Time (DST)?
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?
April through October are months without snowfall.
What is the most humid month in Arnold?
The most humid month is May, with an average relative humidity of 78%.
What is the wettest month in Arnold?
May is the month with the most rainfall. Rain falls for 16.8 days and accumulates 3.94" (100mm) of precipitation.
What are the months with the highest UV index?
May through August, with an average maximum UV index of 6, are months with the highest UV index.
When are the longest days?
June has the longest days of the year, with an average of 14h and 48min of daylight.
What month has the most sunshine?
June has the most sunshine of the year, with an average of 10.4h of sunshine.
What part of the year is the hottest?
The month of July sees the average highest temperatures, reaching 86.9°F (30.5°C) at the peak and 69.3°F (20.7°C) at the low.
What is the least humid month?
With an average relative humidity of 71%, October is the least humid month.
What is the month with the shortest days in Arnold?
December has the shortest days of the year, with an average of 9h and 30min of daylight.
Average temperature
Arnold, MO
The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is January (37.9°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 (25°F).
Average pressure
Arnold, 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:
29.96"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"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
Arnold, MO
- Average wind speed in January:
9.1mph - Average wind speed in February:
9mph - Average wind speed in March:
8.8mph - Average wind speed in April:
8.8mph - Average wind speed in May:
7.1mph - Average wind speed in June:
6.4mph
- Average wind speed in July:
5.5mph - Average wind speed in August:
5.5mph - Average wind speed in September:
5.9mph - Average wind speed in October:
7.6mph - Average wind speed in November:
8.3mph - Average wind speed in December:
8.5mph
The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity
Arnold, MO
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Arnold, MO
- Average rainfall in January:
1.93" - Average rainfall in February:
1.77" - Average rainfall in March:
2.48" - Average rainfall in April:
3.43" - Average rainfall in May:
3.94" - Average rainfall in June:
3.7"
- Average rainfall in July:
3.27" - Average rainfall in August:
3.39" - Average rainfall in September:
2.13" - Average rainfall in October:
2.36" - Average rainfall in November:
1.77" - Average rainfall in December:
2.2"
The wettest month (with the highest rainfall) is May (3.94").
The driest months (with the least rainfall) are February and November (1.77").
Average rainfall days
Arnold, MO
- Average rainfall days in January:
6.8 days - Average rainfall days in February:
6.8 days - Average rainfall days in March:
14.1 days - Average rainfall days in April:
14.7 days - Average rainfall days in May:
16.8 days - Average rainfall days in June:
16 days
- Average rainfall days in July:
16.9 days - Average rainfall days in August:
14.1 days - Average rainfall days in September:
12.6 days - Average rainfall days in October:
9.7 days - Average rainfall days in November:
9.4 days - Average rainfall days in December:
8.2 days
The month with the highest number of rainy days is July (16.9 days).
The months with the least rainy days are January and February (6.8 days).
Average snowfall
Arnold, MO
The month with the highest snowfall is February (2.6").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Arnold, MO
- Average snowfall days in January:
4.8 days - Average snowfall days in February:
4.8 days - Average snowfall days in March:
1.5 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 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
1 days - Average snowfall days in December:
3 days
The months with the highest number of snowfall days are January and February (4.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Arnold, 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 3min - 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 3min - 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 1min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days
Arnold, MO
- Average sunshine days in January:
20.9 days - Average sunshine days in February:
16.8 days - Average sunshine days in March:
14.8 days - Average sunshine days in April:
14 days - Average sunshine days in May:
12.1 days - Average sunshine days in June:
11.6 days
- Average sunshine days in July:
11.8 days - Average sunshine days in August:
14.3 days - Average sunshine days in September:
15.5 days - Average sunshine days in October:
20.5 days - Average sunshine days in November:
18.8 days - Average sunshine days in December:
19.7 days
The month with the most sunshine days is January (20.9 days).
The month with the least sunshine days is June (11.6 days).
Average UV index
Arnold, MO
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover
Arnold, MO
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility
Arnold, 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).
Arnold, Missouri, USA
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