Climate and monthly weather forecastVermilion, IL
Climate and monthly weather forecast
Weather in January
January, like December, in Vermilion, Illinois, is another cold winter month, with an average temperature varying between 21.7°F (-5.7°C) and 33.8°F (1°C). In Vermilion, Illinois, the lowest average temperatures are observed in January, with a high of 33.8°F (1°C) and a low of 21.7°F (-5.7°C). Weather in January »Weather in February
February, the last month of the winter in Vermilion, is also an icy month, with temperature in the range of an average low of 25.5°F (-3.6°C) and an average high of 38.8°F (3.8°C). February's advent presents an average high-temperature of a still icy 38.8°F (3.8°C), indicating a slight variation from the conditions of the previous month. Weather in February »Weather in March
The first month of the spring, March, is a fresh month in Vermilion, Illinois, with temperature in the range of an average low of 36°F (2.2°C) and an average high of 50.4°F (10.2°C). March's arrival sees a rise in the average high-temperature, jumping from February's icy 38.8°F (3.8°C) to a cool 50.4°F (10.2°C). Weather in March »Weather in April
April is a comfortable spring month in Vermilion, Illinois, with an average temperature fluctuating between 46°F (7.8°C) and 62.2°F (16.8°C). The average high-temperature increases in April, moving from a cool 50.4°F (10.2°C) in March to a refreshing 62.2°F (16.8°C). Weather in April »Weather in May
The last month of the spring, May, is an agreeable month in Vermilion, Illinois, with an average temperature ranging between max 72.7°F (22.6°C) and min 56.1°F (13.4°C). As Vermilion transitions into May, the average high-temperature shows a change, moving from a comfortable 62.2°F (16.8°C) in April to a pleasant 72.7°F (22.6°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Vermilion, Illinois, with an average temperature ranging between max 80.6°F (27°C) and min 64°F (17.8°C). The start of June signals a slight increase in the average high-temperature, moving from an agreeable 72.7°F (22.6°C) in May to a moderately hot 80.6°F (27°C). Weather in June »Weather in July
July, like June, in Vermilion, Illinois, is a moderately hot summer month, with an average temperature fluctuating between 65.8°F (18.8°C) and 82.4°F (28°C). Vermilion's July weather, marked by an average high temperature of 82.4°F (28°C) and an average low temperature of 65.8°F (18.8°C), is the warmest in the year. The heat index for July is evaluated at a tropical 91.4°F (33°C). Weather in July »Weather in August
August, the last month of the summer in Vermilion, is also a moderately hot month, with an average temperature fluctuating between 64°F (17.8°C) and 81.1°F (27.3°C). August observes an average high-temperature of a still moderately hot 81.1°F (27.3°C), marking an insignificant difference from July's 82.4°F (28°C). Weather in August »Weather in September
September, the first month of the autumn in Vermilion, is still a warm month, with an average temperature ranging between min 58.6°F (14.8°C) and max 77.2°F (25.1°C). September begins with an average high-temperature of a still moderately hot 77.2°F (25.1°C), reflecting close similarity to the preceding month. Weather in September »Weather in October
October, like September, in Vermilion, Illinois, is another comfortable autumn month, with an average temperature fluctuating between 47.7°F (8.7°C) and 64°F (17.8°C). With the onset of October, Vermilion experiences a modest temperature adjustment, with the average high-temperature receding from a moderately hot 77.2°F (25.1°C) in September to an enjoyable 64°F (17.8°C). Weather in October »Weather in November
The last month of the autumn, November, is also a frosty month in Vermilion, Illinois, with an average temperature varying between 36°F (2.2°C) and 49.6°F (9.8°C). As October gives way to November, the average high-temperature displays a considerable decrease, falling from a refreshing 64°F (17.8°C) to a frosty 49.6°F (9.8°C). Weather in November »Weather in December
December, the first month of the winter in Vermilion, is still a cold month, with an average temperature fluctuating between 39°F (3.9°C) and 28.2°F (-2.1°C). In December, the average high-temperature goes from a frosty 49.6°F (9.8°C) in November to a wintry 39°F (3.9°C). Weather in December »Updated: Jun 14, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Vermilion experiences its lowest temperatures in January, with an average peak of 33.8°F (1°C) and a low of 21.7°F (-5.7°C).
Throughout the year, in Vermilion, there are 133.4 rainfall days, and 19.49" (495mm) of precipitation is accumulated.
Months with snowfall are January through April, November and December.
Throughout the year, there are 23.7 snowfall days, and 5.2" (132mm) of snow is accumulated.
The month with the least sunshine is January, with an average of 4h of sunshine.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
February is the month with the least rainfall. Rain falls for 6.3 days and accumulates 0.94" (24mm) of precipitation.
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.
April is the month with the most rainfall. Rain falls for 13.6 days and accumulates 2.76" (70mm) of precipitation.
May through October are months without snowfall.
With an average of 14h and 54min of daylight, June has the longest days of the year.
The month with the most sunshine is June, with an average of 10.3h of sunshine.
The months with the highest UV index are June and July, with an average maximum UV index of 6.
Vermilion's warmest month, July, registers temperatures that range from a high of 82.4°F (28°C) to a low of 65.8°F (18.8°C).
The most humid month is July, with an average relative humidity of 83%.
October is the least humid month, with an average relative humidity of 71%.
December is the month with the most snowfall. Snow falls for 4.8 days and accumulates 1.61" (41mm) of snow.
The month with the shortest days is December, with an average of 9h and 24min of daylight.
Average temperature
Vermilion, IL
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (33.8°F).
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).
Average pressure
Vermilion, IL
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Vermilion, IL
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.3mph - Average wind speed in March:
10mph - Average wind speed in April:
10.1mph - Average wind speed in May:
8.4mph - Average wind speed in June:
7.3mph
- Average wind speed in July:
6.1mph - Average wind speed in August:
6.1mph - Average wind speed in September:
6.9mph - Average wind speed in October:
8.9mph - Average wind speed in November:
9.6mph - Average wind speed in December:
9.5mph
The windiest months (with the highest average wind speed) are January and February (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.1mph).
Average humidity
Vermilion, IL
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Vermilion, IL
- Average rainfall in January:
1.34" - Average rainfall in February:
0.94" - Average rainfall in March:
1.38" - Average rainfall in April:
2.76" - Average rainfall in May:
2.4" - Average rainfall in June:
2.13"
- Average rainfall in July:
1.89" - Average rainfall in August:
1.54" - Average rainfall in September:
1.1" - Average rainfall in October:
1.69" - Average rainfall in November:
1.06" - Average rainfall in December:
1.26"
The wettest month (with the highest rainfall) is April (2.76").
The driest month (with the least rainfall) is February (0.94").
Average rainfall days
Vermilion, IL
- Average rainfall days in January:
6.9 days - Average rainfall days in February:
6.3 days - Average rainfall days in March:
11.3 days - Average rainfall days in April:
13.6 days - Average rainfall days in May:
16.8 days - Average rainfall days in June:
13.7 days
- Average rainfall days in July:
15.6 days - Average rainfall days in August:
12.4 days - Average rainfall days in September:
11 days - Average rainfall days in October:
9.9 days - Average rainfall days in November:
7.6 days - Average rainfall days in December:
8.3 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (6.3 days).
Average snowfall
Vermilion, IL
The month with the highest snowfall is December (1.61").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Vermilion, IL
- Average snowfall days in January:
6.9 days - Average snowfall days in February:
6.5 days - Average snowfall days in March:
3.3 days - Average snowfall days in April:
0.5 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:
1.6 days - Average snowfall days in December:
4.8 days
The month with the highest number of snowfall days is January (6.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Vermilion, IL
- Average daylight in January:
9h and 48min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 24min - Average daylight in June:
14h and 54min
- Average daylight in July:
14h and 36min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 6min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
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 18min - Average sunshine in March:
6h and 18min - Average sunshine in April:
8h and 12min - Average sunshine in May:
8h and 54min - Average sunshine in June:
10h and 18min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
10h and 6min - Average sunshine in September:
9h and 0min - Average sunshine in October:
6h and 30min - Average sunshine in November:
5h and 24min - Average sunshine in December:
4h and 24min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days
Vermilion, IL
- Average sunshine days in January:
18.1 days - Average sunshine days in February:
16.3 days - Average sunshine days in March:
15.5 days - Average sunshine days in April:
13.8 days - Average sunshine days in May:
11.3 days - Average sunshine days in June:
12.4 days
- Average sunshine days in July:
11.8 days - Average sunshine days in August:
14.9 days - Average sunshine days in September:
17.2 days - Average sunshine days in October:
18.6 days - Average sunshine days in November:
20 days - Average sunshine days in December:
19.2 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (11.3 days).
Average UV index
Vermilion, IL
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Vermilion, IL
The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are June, August and September (Cloud cover 31).
Average visibility
Vermilion, 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).
