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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, the same as December, in Seymour, Illinois, is another subzero cold winter month, with an average temperature ranging between min 19.9°F (-6.7°C) and max 31.5°F (-0.3°C). January, with average temperatures reaching a high of 31.5°F (-0.3°C) and a low of 19.9°F (-6.7°C), is the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is a cold month in Seymour, Illinois, with an average temperature fluctuating between 36.9°F (2.7°C) and 23.7°F (-4.6°C). The start of February brings a subtle rise in the average high-temperature, moving from a freezing cold 31.5°F (-0.3°C) in January to an icy 36.9°F (2.7°C). Weather in February »
Weather in March
March, the first month of the spring in Seymour, is a frosty month, with temperature in the range of an average low of 34.5°F (1.4°C) and an average high of 49.3°F (9.6°C). The transition from February to March brings a temperature rise, with average high-temperatures increasing from a cold 36.9°F (2.7°C) to a chilly 49.3°F (9.6°C). Weather in March »
Weather in April
April in Seymour, Illinois, is an enjoyable spring month, with an average temperature ranging between max 61.3°F (16.3°C) and min 45.5°F (7.5°C). Seymour in April shows a temperature shift, moving from an average high of a chilly 49.3°F (9.6°C) in March to a refreshing 61.3°F (16.3°C). Weather in April »
Weather in May
May, the last month of the spring in Seymour, is an agreeable month, with an average temperature fluctuating between 72.3°F (22.4°C) and 55.9°F (13.3°C). May's onset witnesses a shift in the average high-temperature, moving from a refreshing 61.3°F (16.3°C) in April to an agreeable 72.3°F (22.4°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Seymour, Illinois, with an average temperature fluctuating between 63.9°F (17.7°C) and 79.9°F (26.6°C). Seymour's June weather indicates a minor increase in high-temperatures, edging from May's pleasant 72.3°F (22.4°C) to a warm 79.9°F (26.6°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Seymour, Illinois, with an average temperature fluctuating between 64.9°F (18.3°C) and 81.1°F (27.3°C). The average temperatures reach their apex in July, averaging 81.1°F (27.3°C) at the high end and 64.9°F (18.3°C) at the low end. July's mean heat index is estimated at a tropical 87.8°F (31°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Seymour, Illinois, with temperature in the range of an average high of 80.2°F (26.8°C) and an average low of 63.1°F (17.3°C). Seymour's average high-temperature in August is a still warm 80.2°F (26.8°C), indicating a subtle variation from July. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Seymour, Illinois, with an average temperature ranging between min 58.3°F (14.6°C) and max 76.1°F (24.5°C). The arrival of September is marked by an average high-temperature of a still moderately hot 76.1°F (24.5°C), bearing a close resemblance to August. Weather in September »
Weather in October
October, the same as September, is another refreshing autumn month in Seymour, Illinois, with an average temperature varying between 63.5°F (17.5°C) and 47.3°F (8.5°C). Welcoming October, Seymour observes a shift in the average high-temperature, falling from September's warm 76.1°F (24.5°C) to an enjoyable 63.5°F (17.5°C). Weather in October »
Weather in November
November, the last month of the autumn in Seymour, is also a frosty month, with an average temperature varying between 49.1°F (9.5°C) and 35.6°F (2°C). With the onset of November, Seymour's average high-temperature witnesses a clear drop, receding from October's refreshing 63.5°F (17.5°C) to a chilly 49.1°F (9.5°C). Weather in November »
Weather in December
December, the first month of the winter in Seymour, is also an icy month, with temperature in the range of an average high of 37.6°F (3.1°C) and an average low of 27.5°F (-2.5°C). As December commences, the average high-temperature shows a reduction, transitioning from a frosty 49.1°F (9.5°C) in November to a cold 37.6°F (3.1°C). Weather in December »
[Resources]Frequently asked questions
What part of the year is the coldest in Seymour?
Seymour, Illinois, experiences its average lowest temperatures in January, reaching a peak of 31.5°F (-0.3°C) and a minimum of 19.9°F (-6.7°C).
How many days does it rain in Seymour?
In Seymour, during the entire year, the rain falls for 152.9 days and collects up to 29.72" (755mm) of precipitation.
When does it snow in Seymour?
Months with snowfall in Seymour are January through April, October through December.
When does it snow the most in Seymour?
The month with the most snowfall in Seymour, Illinois, is January, when snow falls for 11.4 days and typically aggregates up to 4.25" (108mm) of snow.
How many days does it snow in Seymour?
Throughout the year, there are 33.9 snowfall days, and 11.81" (300mm) of snow is accumulated.
What is the month with the least sunshine in Seymour?
With an average of 4h of sunshine, January has the least sunshine of the year.
When is the lowest UV index in Seymour?
The months with the lowest UV index in Seymour, Illinois, are January, February, November and December, with an average maximum UV index of 2.
When is Daylight Saving Time (DST) in Seymour?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Seymour, Illinois, 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 rainiest month in Seymour?
The month with the most rainfall in Seymour is May, when the rain falls for 18.8 days and typically aggregates up to 3.9" (99mm) of precipitation.
When it does not snow in Seymour?
In Seymour, snow does not fall in May through September.
When are the longest days in Seymour?
June has the longest days of the year in Seymour, Illinois, with an average of 15h and 0min of daylight.
What month has the most sunshine in Seymour?
With an average of 10.2h of sunshine, June has the most sunshine of the year in Seymour, Illinois.
When is the highest UV index in Seymour?
The months with the highest UV index in Seymour are June through August, with an average maximum UV index of 6.
What are the warmest months in Seymour?
In Seymour, temperatures reach their average annual highs in July, measuring 81.1°F (27.3°C) and a minimum average of 64.9°F (18.3°C).
What is the most humid month in Seymour?
July is the most humid month in Seymour, Illinois, with an average relative humidity of 85%.
What is the least humid month in Seymour?
October is the least humid month in Seymour, with an average relative humidity of 70%.
What is the driest month in Seymour?
The month with the least rainfall in Seymour is December, when the rain falls for 8.4 days and typically collects 1.65" (42mm) of precipitation.
What is the month with the shortest days in Seymour?
December has the shortest days of the year in Seymour, with an average of 9h and 24min of daylight.
Average temperature
Seymour, IL
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.5°F).
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).
Average pressure
Seymour, IL
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.08"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:
30.03"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Seymour, IL
- Average wind speed in January:
10.9mph - Average wind speed in February:
10.8mph - Average wind speed in March:
10.4mph - Average wind speed in April:
10.7mph - Average wind speed in May:
9mph - Average wind speed in June:
7.8mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.4mph - Average wind speed in September:
7.4mph - Average wind speed in October:
9.6mph - Average wind speed in November:
10.3mph - Average wind speed in December:
10.3mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity
Seymour, IL
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (70%).
Average rainfall
Seymour, IL
- Average rainfall in January:
2.01" - Average rainfall in February:
1.81" - Average rainfall in March:
2.72" - Average rainfall in April:
3.31" - Average rainfall in May:
3.9" - Average rainfall in June:
3.27"
- Average rainfall in July:
2.44" - Average rainfall in August:
2.2" - Average rainfall in September:
1.77" - Average rainfall in October:
2.64" - Average rainfall in November:
2.01" - Average rainfall in December:
1.65"
The wettest month (with the highest rainfall) is May (3.9").
The driest month (with the least rainfall) is December (1.65").
Average rainfall days
Seymour, IL
- Average rainfall days in January:
6.7 days - Average rainfall days in February:
6.3 days - Average rainfall days in March:
13.4 days - Average rainfall days in April:
15.9 days - Average rainfall days in May:
18.8 days - Average rainfall days in June:
16.6 days
- Average rainfall days in July:
17.8 days - Average rainfall days in August:
14.1 days - Average rainfall days in September:
12.8 days - Average rainfall days in October:
12.3 days - Average rainfall days in November:
9.8 days - Average rainfall days in December:
8.4 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is February (6.3 days).
Average snowfall
Seymour, IL
The month with the highest snowfall is January (4.25").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Seymour, IL
- Average snowfall days in January:
11.4 days - Average snowfall days in February:
8.6 days - Average snowfall days in March:
3.3 days - Average snowfall days in April:
0.9 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:
0.2 days - Average snowfall days in November:
2.4 days - Average snowfall days in December:
7.1 days
The month with the highest number of snowfall days is January (11.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Seymour, IL
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 2min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 4min - 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 0min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
4h and 0min - Average sunshine in February:
4h and 1min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 1min - Average sunshine in May:
9h and 1min - Average sunshine in June:
10h and 1min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 5min - Average sunshine in September:
8h and 5min - Average sunshine in October:
6h and 1min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 3min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days
Seymour, IL
- Average sunshine days in January:
14.6 days - Average sunshine days in February:
13.8 days - Average sunshine days in March:
14 days - Average sunshine days in April:
11.6 days - Average sunshine days in May:
10.3 days - Average sunshine days in June:
10.2 days
- Average sunshine days in July:
10.5 days - Average sunshine days in August:
14.8 days - Average sunshine days in September:
15.3 days - Average sunshine days in October:
16.5 days - Average sunshine days in November:
18 days - Average sunshine days in December:
16.2 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is June (10.2 days).
Average UV index
Seymour, IL
The months with the highest UV index are 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
Seymour, IL
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are August and September (Cloud cover 31).
Average visibility
Seymour, IL
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Seymour, Illinois, USA
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