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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 Sullivan, Missouri, is an icy winter month, with an average temperature varying between 24.4°F (-4.2°C) and 39°F (3.9°C). January is the coldest month, exhibiting average temperatures of 39°F (3.9°C) at the peak and 24.4°F (-4.2°C) at the base. Weather in January »
Weather in February
February, the last month of the winter in Sullivan, is a frosty month, with an average temperature ranging between max 43.2°F (6.2°C) and min 27.9°F (-2.3°C). Sullivan indicates an average high-temperature of a frosty 43.2°F (6.2°C) in February, showing minor variation from January's 39°F (3.9°C). Weather in February »
Weather in March
March, the first month of the spring in Sullivan, is a fresh month, with an average temperature ranging between min 37.8°F (3.2°C) and max 55°F (12.8°C). The arrival of March brings a change in Sullivan's weather, with average high-temperatures moving from February's frosty 43.2°F (6.2°C) to a fresh 55°F (12.8°C). Weather in March »
Weather in April
April in Sullivan, Missouri, is an enjoyable spring month, with an average temperature ranging between max 66°F (18.9°C) and min 47.1°F (8.4°C). An increase in the average high-temperature marks April, moving from March's cool 55°F (12.8°C) to a refreshing 66°F (18.9°C). Weather in April »
Weather in May
May, the last month of the spring in Sullivan, is a warm month, with an average temperature ranging between min 56.1°F (13.4°C) and max 76.1°F (24.5°C). The beginning of May signals a rise in the average high-temperature, moving from an enjoyable 66°F (18.9°C) in April to a warm 76.1°F (24.5°C). Weather in May »
Weather in June
June, the first month of the summer in Sullivan, is still a warm month, with temperature in the range of an average high of 85.6°F (29.8°C) and an average low of 64.9°F (18.3°C). Sullivan's June weather shows an increase in high-temperatures, moving from May's warm 76.1°F (24.5°C) to a still moderately hot 85.6°F (29.8°C). Weather in June »
Weather in July
July in Sullivan, Missouri, is a hot summer month, with temperature in the range of an average low of 67.6°F (19.8°C) and an average high of 88.3°F (31.3°C). Sullivan's warmest month, July, generally records average temperatures ranging from a high of 88.3°F (31.3°C) to a low of 67.6°F (19.8°C). The average heat index in July is evaluated at a blistering 104°F (40°C). Weather in July »
Weather in August
August, the last month of the summer in Sullivan, is another hot month, with an average temperature fluctuating between 65.7°F (18.7°C) and 87.1°F (30.6°C). As Sullivan welcomes August, the average high-temperature stabilizes at a still tropical 87.1°F (30.6°C), showing little deviation from July's 88.3°F (31.3°C). Weather in August »
Weather in September
September, the first month of the autumn in Sullivan, is still a warm month, with an average temperature varying between 80.4°F (26.9°C) and 58.8°F (14.9°C). September witnesses a gentle descent in average high-temperature, descending from August's hot 87.1°F (30.6°C) to a warm 80.4°F (26.9°C). Weather in September »
Weather in October
October, the same as September, is another enjoyable autumn month in Sullivan, Missouri, with temperature in the range of an average low of 48°F (8.9°C) and an average high of 66.2°F (19°C). The transition into October indicates a reduction in the average high-temperature, down to an enjoyable 66.2°F (19°C) from September's moderately hot 80.4°F (26.9°C). Weather in October »
Weather in November
November, the last month of the autumn in Sullivan, is another cool month, with an average temperature ranging between max 53.6°F (12°C) and min 37.2°F (2.9°C). As November commences, the average high-temperature shows a reduction, transitioning from a refreshing 66.2°F (19°C) in October to a fresh 53.6°F (12°C). Weather in November »
Weather in December
December, the first month of the winter in Sullivan, is still a chilly month, with an average temperature varying between 30°F (-1.1°C) and 43.2°F (6.2°C). In the transition to December, Sullivan observes a drop in the average high-temperature, moving from a cool 53.6°F (12°C) in November to a chilly 43.2°F (6.2°C). 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 time of the year is the coldest in Sullivan?
January, having an average high-temperature of 39°F (3.9°C) and an average low-temperature of 24.4°F (-4.2°C), is the coldest month in Sullivan, Missouri.
How many days does it rain in Sullivan?
Throughout the year, in Sullivan, there are 149.6 rainfall days, and 32.05" (814mm) of precipitation is accumulated.
When does it snow in Sullivan?
Months with snowfall in Sullivan are January through March, November and December.
When does it snow the most in Sullivan?
The month with the most snowfall in Sullivan, Missouri, is January, when snow falls for 7.1 days and typically aggregates up to 2.68" (68mm) of snow.
How much does it snow in Sullivan?
Throughout the year, in Sullivan, there are 21.6 snowfall days, and 9.41" (239mm) of snow is accumulated.
What is the month with the least sunshine in Sullivan?
January has the least sunshine of the year in Sullivan, Missouri, with an average of 4.7h of sunshine.
When is the lowest UV index in Sullivan?
The months with the lowest UV index in Sullivan, Missouri, are January, February, November and December, with an average maximum UV index of 2.
When is Daylight Saving Time (DST) in Sullivan?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Sullivan, 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.
What is the wettest month in Sullivan?
April is the month with the most rainfall. Rain falls for 14.8 days and accumulates 3.86" (98mm) of precipitation.
When it does not snow in Sullivan?
In Sullivan, snow does not fall in April through October.
What is the most humid month in Sullivan?
The most humid month is May, with an average relative humidity of 78%.
When is the highest UV index in Sullivan?
May through August, with an average maximum UV index of 6, are months with the highest UV index.
When are the longest days in Sullivan?
With an average of 14h and 48min of daylight, June has the longest days of the year.
What month is the hottest in Sullivan?
Sullivan, Missouri, registers the average highest temperatures during July, with peaks of 88.3°F (31.3°C) and lows of 67.6°F (19.8°C).
What month has the most sunshine in Sullivan?
July has the most sunshine of the year in Sullivan, Missouri, with an average of 10.6h of sunshine.
What is the least humid month in Sullivan?
October is the least humid month in Sullivan, Missouri, with an average relative humidity of 72%.
What is the driest month in Sullivan?
November is the month with the least rainfall in Sullivan. Rain falls for 9.8 days and accumulates 1.85" (47mm) of precipitation.
What is the month with the shortest days in Sullivan?
December has the shortest days of the year, with an average of 9h and 36min of daylight.
Average temperature
Sullivan, MO
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (39°F).
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (24.4°F).
Average pressure
Sullivan, 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
Sullivan, MO
- Average wind speed in January:
8.6mph - Average wind speed in February:
8.4mph - Average wind speed in March:
8.3mph - Average wind speed in April:
8.3mph - Average wind speed in May:
6.8mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
5.4mph - Average wind speed in August:
5.3mph - Average wind speed in September:
5.7mph - Average wind speed in October:
7.1mph - 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 (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity
Sullivan, MO
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Sullivan, MO
- Average rainfall in January:
1.97" - Average rainfall in February:
1.89" - Average rainfall in March:
2.72" - Average rainfall in April:
3.86" - Average rainfall in May:
3.82" - Average rainfall in June:
3.11"
- Average rainfall in July:
2.83" - Average rainfall in August:
3.23" - Average rainfall in September:
1.93" - Average rainfall in October:
2.6" - Average rainfall in November:
1.85" - Average rainfall in December:
2.24"
The wettest month (with the highest rainfall) is April (3.86").
The driest month (with the least rainfall) is November (1.85").
Average rainfall days
Sullivan, MO
- Average rainfall days in January:
7 days - Average rainfall days in February:
8.3 days - Average rainfall days in March:
14 days - Average rainfall days in April:
14.8 days - Average rainfall days in May:
16.9 days - Average rainfall days in June:
15.6 days
- Average rainfall days in July:
16.3 days - Average rainfall days in August:
15 days - Average rainfall days in September:
12.7 days - Average rainfall days in October:
11.1 days - Average rainfall days in November:
9.8 days - Average rainfall days in December:
8.1 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (7 days).
Average snowfall
Sullivan, MO
The month with the highest snowfall is January (2.68").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Sullivan, MO
- Average snowfall days in January:
7.1 days - Average snowfall days in February:
5.7 days - Average snowfall days in March:
2.6 days - Average snowfall days in April:
0.3 days - Average snowfall days in May:
0.1 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:
1.5 days - Average snowfall days in December:
4.2 days
The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Sullivan, 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 4min
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 36min).
- Average sunshine in January:
4h and 4min - Average sunshine in February:
4h and 5min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 4min - Average sunshine in May:
9h and 2min - Average sunshine in June:
10h and 3min
- Average sunshine in July:
10h and 4min - Average sunshine in August:
10h and 1min - Average sunshine in September:
9h and 4min - Average sunshine in October:
6h and 0min - Average sunshine in November:
5h and 3min - Average sunshine in December:
5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days
Sullivan, MO
- Average sunshine days in January:
19.1 days - Average sunshine days in February:
15.2 days - Average sunshine days in March:
14.2 days - Average sunshine days in April:
13.3 days - Average sunshine days in May:
12.3 days - Average sunshine days in June:
12.3 days
- Average sunshine days in July:
11.9 days - Average sunshine days in August:
13.4 days - Average sunshine days in September:
15 days - Average sunshine days in October:
18.4 days - Average sunshine days in November:
18.1 days - Average sunshine days in December:
19 days
The month with the most sunshine days is January (19.1 days).
The month with the least sunshine days is July (11.9 days).
Average UV index
Sullivan, 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, November and December (UV index 2).
Average cloud cover
Sullivan, MO
The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are June and July (Cloud cover 29).
Average visibility
Sullivan, MO
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Sullivan, Missouri, USA
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