Climate and monthly weather forecastAviston, IL
Climate and monthly weather forecast
Weather in January
January, like December, in Aviston, Illinois, is another cold winter month, with an average temperature varying between 24.8°F (-4°C) and 37.8°F (3.2°C). In Aviston, January records the lowest average temperatures, peaking at 37.8°F (3.2°C) and reaching a low of 24.8°F (-4°C). Weather in January »Weather in February
The last month of the winter, February, is also an icy month in Aviston, Illinois, with an average temperature ranging between min 27.9°F (-2.3°C) and max 42.3°F (5.7°C). February welcomes an average high-temperature of a still wintry 42.3°F (5.7°C), not much different from the preceding month. Weather in February »Weather in March
March, the first month of the spring in Aviston, is a cool month, with an average temperature fluctuating between 54.1°F (12.3°C) and 37.9°F (3.3°C). With the onset of March, Aviston's weather sees a temperature rise, transitioning from a cold 42.3°F (5.7°C) in February to a fresh 54.1°F (12.3°C). Weather in March »Weather in April
April in Aviston, Illinois, is a comfortable spring month, with temperature in the range of an average low of 47.7°F (8.7°C) and an average high of 64.9°F (18.3°C). Aviston in April sees a temperature change, with average high-temperatures moving from a cool 54.1°F (12.3°C) in March to an enjoyable 64.9°F (18.3°C). Weather in April »Weather in May
The last month of the spring, May, is a warm month in Aviston, Illinois, with an average temperature varying between 57.7°F (14.3°C) and 74.7°F (23.7°C). With the onset of May, Aviston sees a temperature rise, with the average high-temperature moving from April's comfortable 64.9°F (18.3°C) to a moderately hot 74.7°F (23.7°C). Weather in May »Weather in June
June, the first month of the summer in Aviston, is still a warm month, with an average temperature ranging between min 66.4°F (19.1°C) and max 83.5°F (28.6°C). Aviston's transition into June is noticed by a slight rise in the average high-temperature, advancing from a warm 74.7°F (23.7°C) in May to a still moderately hot 83.5°F (28.6°C). Weather in June »Weather in July
July, like June, in Aviston, Illinois, is another warm summer month, with temperature in the range of an average low of 68°F (20°C) and an average high of 85.6°F (29.8°C). July is the month that records the highest temperatures, with averages ranging from a high of 85.6°F (29.8°C) to a low of 68°F (20°C). The heat index value during July is estimated at a very hot 98.6°F (37°C). Weather in July »Weather in August
August, the last month of the summer in Aviston, is another warm month, with an average temperature varying between 65.8°F (18.8°C) and 83.8°F (28.8°C). August's climate shows a minor adjustment in average high-temperatures to a still warm 83.8°F (28.8°C) from July's 85.6°F (29.8°C). Weather in August »Weather in September
The first month of the autumn, September, is also a moderately hot month in Aviston, Illinois, with an average temperature ranging between min 59.9°F (15.5°C) and max 78.8°F (26°C). The transition into September shows a subtle variation to a still moderately hot 78.8°F (26°C) from August's 83.8°F (28.8°C) in the average high-temperature. Weather in September »Weather in October
October, the same as September, is another comfortable autumn month in Aviston, Illinois, with an average temperature varying between 49.1°F (9.5°C) and 66.4°F (19.1°C). A shift in the average high-temperature occurs in October, reducing from a warm 78.8°F (26°C) in September to an enjoyable 66.4°F (19.1°C). Weather in October »Weather in November
November, the last month of the autumn in Aviston, is another cool month, with an average temperature fluctuating between 52.9°F (11.6°C) and 37.8°F (3.2°C). The start of November signals a decrease in the average high-temperature, transitioning from a comfortable 66.4°F (19.1°C) in October to a cool 52.9°F (11.6°C). Weather in November »Weather in December
December, the first month of the winter in Aviston, is also an icy month, with an average temperature ranging between max 42.3°F (5.7°C) and min 30.2°F (-1°C). A change in temperatures is noted as November gives way to December, with average highs reducing from a cool 52.9°F (11.6°C) to an icy 42.3°F (5.7°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
The month of January, characterized by an average high of 37.8°F (3.2°C) and a low of 24.8°F (-4°C), is recognized as the coldest.
In Aviston, during the entire year, the rain falls for 151.1 days and collects up to 30.43" (773mm) of precipitation.
Months with snowfall in Aviston, Illinois, are January through April, October through December.
In Aviston, Illinois, during the entire year, snow falls for 22.4 days and aggregates up to 6.1" (155mm) of snow.
The months with the least sunshine in Aviston are January and February, with an average of 4.6h of sunshine.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Aviston.
February is the month with the least rainfall in Aviston. Rain falls for 8.9 days and accumulates 1.5" (38mm) of precipitation.
The month with the most snowfall in Aviston is February, when snow falls for 6.3 days and typically aggregates up to 1.85" (47mm) of snow.
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.
In Aviston, snow does not fall in May through September.
The months with the highest UV index are May through August, with an average maximum UV index of 6.
The month with the most rainfall in Aviston is June, when the rain falls for 16.2 days and typically aggregates up to 3.66" (93mm) of precipitation.
The month with the longest days is June, with an average of 14h and 48min of daylight.
June has the most sunshine of the year in Aviston, with an average of 10.5h of sunshine.
July is the warmest month of the year in Aviston, registering average temperatures as high as 85.6°F (29.8°C) and as low as 68°F (20°C).
With an average relative humidity of 80%, July is the most humid month in Aviston, Illinois.
With an average relative humidity of 71%, October is the least humid month in Aviston, Illinois.
December has the shortest days of the year, with an average of 9h and 30min of daylight.
Average temperature
Aviston, IL
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37.8°F).
The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure
Aviston, IL
- 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:
29.93"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:
30.13"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 (29.93"Hg).
Average wind speed
Aviston, IL
- Average wind speed in January:
9.6mph - Average wind speed in February:
9.5mph - Average wind speed in March:
9.4mph - Average wind speed in April:
9.2mph - Average wind speed in May:
7.6mph - Average wind speed in June:
6.6mph
- Average wind speed in July:
5.7mph - Average wind speed in August:
5.7mph - Average wind speed in September:
6.2mph - Average wind speed in October:
8mph - Average wind speed in November:
8.7mph - Average wind speed in December:
8.8mph
The windiest month (with the highest average wind speed) is January (9.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity
Aviston, IL
The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Aviston, IL
- Average rainfall in January:
1.89" - Average rainfall in February:
1.5" - Average rainfall in March:
2.28" - Average rainfall in April:
3.43" - Average rainfall in May:
3.58" - Average rainfall in June:
3.66"
- Average rainfall in July:
3.31" - Average rainfall in August:
3.07" - Average rainfall in September:
1.77" - Average rainfall in October:
2.32" - Average rainfall in November:
1.73" - Average rainfall in December:
1.89"
The wettest month (with the highest rainfall) is June (3.66").
The driest month (with the least rainfall) is February (1.5").
Average rainfall days
Aviston, IL
- Average rainfall days in January:
8 days - Average rainfall days in February:
8.9 days - Average rainfall days in March:
14.3 days - Average rainfall days in April:
14.9 days - Average rainfall days in May:
17.3 days - Average rainfall days in June:
16.2 days
- Average rainfall days in July:
17.1 days - Average rainfall days in August:
13.7 days - Average rainfall days in September:
12 days - Average rainfall days in October:
10.5 days - Average rainfall days in November:
9.7 days - Average rainfall days in December:
8.5 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (8 days).
Average snowfall
Aviston, IL
The month with the highest snowfall is February (1.85").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Aviston, IL
- Average snowfall days in January:
7.5 days - Average snowfall days in February:
6.3 days - Average snowfall days in March:
2.3 days - Average snowfall days in April:
0.3 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:
1.4 days - Average snowfall days in December:
4.5 days
The month with the highest number of snowfall days is January (7.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Aviston, IL
- Average daylight in January:
9h and 48min - Average daylight in February:
10h and 48min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 12min - Average daylight in May:
14h and 18min - Average daylight in June:
14h and 48min
- Average daylight in July:
14h and 30min - Average daylight in August:
13h and 36min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 6min - Average daylight in December:
9h and 30min
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 36min - Average sunshine in February:
4h and 36min - Average sunshine in March:
6h and 24min - Average sunshine in April:
8h and 24min - Average sunshine in May:
9h and 18min - Average sunshine in June:
10h and 30min
- Average sunshine in July:
10h and 18min - Average sunshine in August:
10h and 6min - Average sunshine in September:
9h and 18min - Average sunshine in October:
6h and 18min - Average sunshine in November:
5h and 30min - Average sunshine in December:
4h and 48min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).
Average sunshine days
Aviston, IL
- Average sunshine days in January:
16.4 days - Average sunshine days in February:
14.1 days - Average sunshine days in March:
13.8 days - Average sunshine days in April:
13 days - Average sunshine days in May:
11.2 days - Average sunshine days in June:
11.4 days
- Average sunshine days in July:
11 days - Average sunshine days in August:
14.9 days - Average sunshine days in September:
15.8 days - Average sunshine days in October:
18.8 days - Average sunshine days in November:
18.4 days - Average sunshine days in December:
18 days
The month with the most sunshine days is October (18.8 days).
The month with the least sunshine days is July (11 days).
Average UV index
Aviston, IL
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
Aviston, IL
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility
Aviston, IL
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).
