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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, is an icy winter month in Fayetteville, Illinois, with temperature in the range of an average high of 38.3°F (3.5°C) and an average low of 25.2°F (-3.8°C). January, known for its average high temperature of 38.3°F (3.5°C) and an average low temperature of 25.2°F (-3.8°C), is the coldest month. Weather in January »
Weather in February
February, the last month of the winter in Fayetteville, is a frosty month, with an average temperature varying between 43.3°F (6.3°C) and 28.8°F (-1.8°C). February's average high-temperature is a frosty 43.3°F (6.3°C), maintaining a close comparison with January's 38.3°F (3.5°C). Weather in February »
Weather in March
March, the first month of the spring in Fayetteville, is a cool month, with an average temperature fluctuating between 38.3°F (3.5°C) and 54.5°F (12.5°C). The shift into March is marked by a rise in the average high-temperature, moving from February's chilly 43.3°F (6.3°C) to a fresh 54.5°F (12.5°C). Weather in March »
Weather in April
April is a refreshing spring month in Fayetteville, Illinois, with an average temperature fluctuating between 47.8°F (8.8°C) and 65.7°F (18.7°C). The average high-temperature increases in April, moving from a cool 54.5°F (12.5°C) in March to an enjoyable 65.7°F (18.7°C). Weather in April »
Weather in May
The last month of the spring, May, is a moderately hot month in Fayetteville, Illinois, with an average temperature varying between 57.7°F (14.3°C) and 75°F (23.9°C). May brings an increase in the average high-temperature, progressing from a refreshing 65.7°F (18.7°C) in April to a warm 75°F (23.9°C). Weather in May »
Weather in June
June, the first month of the summer in Fayetteville, is also a moderately hot month, with an average temperature varying between 84.6°F (29.2°C) and 66.4°F (19.1°C). June's arrival brings a change in high-temperatures, moving from a warm 75°F (23.9°C) in May to a still moderately hot 84.6°F (29.2°C). Weather in June »
Weather in July
July in Fayetteville, Illinois, is a hot summer month, with an average temperature fluctuating between 86.5°F (30.3°C) and 68.5°F (20.3°C). In Fayetteville, temperatures reach their average annual highs in July, measuring 86.5°F (30.3°C) and a minimum average of 68.5°F (20.3°C). The heat index value for July is appraised at a very hot 100.4°F (38°C). Weather in July »
Weather in August
August, the last month of the summer in Fayetteville, is another warm month, with an average temperature ranging between min 65.8°F (18.8°C) and max 84.7°F (29.3°C). Fayetteville's August reports an average high-temperature of a warm 84.7°F (29.3°C), exhibiting a minor difference from July. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Fayetteville, Illinois, with temperature in the range of an average low of 60.1°F (15.6°C) and an average high of 79.2°F (26.2°C). In the transition to September, Fayetteville observes a minor drop in the average high-temperature, shifting from 84.7°F (29.3°C) in August to a still warm 79.2°F (26.2°C). Weather in September »
Weather in October
October, the same as September, is another refreshing autumn month in Fayetteville, Illinois, with an average temperature ranging between max 66.7°F (19.3°C) and min 49.1°F (9.5°C). Observing a mild shift, the average high-temperature during October reduces from September's moderately hot 79.2°F (26.2°C) to a refreshing 66.7°F (19.3°C). Weather in October »
Weather in November
The last month of the autumn, November, is another cool month in Fayetteville, Illinois, with an average temperature ranging between max 53.6°F (12°C) and min 38.3°F (3.5°C). Fayetteville's average high-temperature decreases in November, falling from a comfortable 66.7°F (19.3°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 Fayetteville, is also a frosty month, with an average temperature fluctuating between 31.1°F (-0.5°C) and 43.3°F (6.3°C). December ushers in a slight temperature change, with average high-temperatures reducing from November's fresh 53.6°F (12°C) to a frosty 43.3°F (6.3°C). Weather in December »
Updated: Jul 23, 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 are the coldest months?
January, having an average high-temperature of 38.3°F (3.5°C) and an average low-temperature of 25.2°F (-3.8°C), is the coldest month.
How much does it rain?
In Fayetteville, Illinois, during the entire year, the rain falls for 129.8 days and collects up to 19.13" (486mm) of precipitation.
When does it snow?
January through March, September through December are months with snowfall.
What is the snowiest month?
The month with the most snowfall in Fayetteville is January, when snow falls for 5.6 days and typically aggregates up to 1.06" (27mm) of snow.
How much does it snow?
In Fayetteville, during the entire year, snow falls for 16.2 days and aggregates up to 3.19" (81mm) of snow.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 4.7h of sunshine.
What are the months with the lowest UV index?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Fayetteville.
What is the driest month?
The month with the least rainfall is February, when the rain falls for 7.4 days and typically collects 0.83" (21mm) of precipitation.
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 August are months without snowfall.
What is the most humid month?
The most humid month is May, with an average relative humidity of 79%.
What is the rainiest month?
The month with the most rainfall is May, when the rain falls for 14.8 days and typically aggregates up to 2.48" (63mm) of precipitation.
What is the month 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 in Fayetteville?
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 10.6h of sunshine.
What is the hottest time of year?
July is the warmest month, with an average high-temperature of 86.5°F (30.3°C) and an average low-temperature of 68.5°F (20.3°C).
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?
With an average of 9h and 30min of daylight, December has the shortest days of the year.
Average temperature
Fayetteville, IL
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (38.3°F).
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).
Average pressure
Fayetteville, 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:
30.03"Hg - Average pressure in October:
30.04"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
Fayetteville, IL
- Average wind speed in January:
9.4mph - Average wind speed in February:
9.3mph - Average wind speed in March:
9.2mph - Average wind speed in April:
9mph - Average wind speed in May:
7.5mph - Average wind speed in June:
6.5mph
- Average wind speed in July:
5.6mph - Average wind speed in August:
5.6mph - Average wind speed in September:
6.2mph - Average wind speed in October:
7.9mph - Average wind speed in November:
8.5mph - Average wind speed in December:
8.7mph
The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.6mph).
Average humidity
Fayetteville, IL
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Fayetteville, IL
- Average rainfall in January:
1.18" - Average rainfall in February:
0.83" - Average rainfall in March:
1.3" - Average rainfall in April:
2.05" - Average rainfall in May:
2.48" - Average rainfall in June:
2.13"
- Average rainfall in July:
2.13" - Average rainfall in August:
2.05" - Average rainfall in September:
1.14" - Average rainfall in October:
1.65" - Average rainfall in November:
1.02" - Average rainfall in December:
1.18"
The wettest month (with the highest rainfall) is May (2.48").
The driest month (with the least rainfall) is February (0.83").
Average rainfall days
Fayetteville, IL
- Average rainfall days in January:
6.5 days - Average rainfall days in February:
7.4 days - Average rainfall days in March:
12.3 days - Average rainfall days in April:
12.6 days - Average rainfall days in May:
14.8 days - Average rainfall days in June:
13.3 days
- Average rainfall days in July:
15.1 days - Average rainfall days in August:
12.5 days - Average rainfall days in September:
11.3 days - Average rainfall days in October:
9.8 days - Average rainfall days in November:
7.7 days - Average rainfall days in December:
6.5 days
The month with the highest number of rainy days is July (15.1 days).
The months with the least rainy days are January and December (6.5 days).
Average snowfall
Fayetteville, IL
The month with the highest snowfall is January (1.06").
The months with the least snowfall are April, May, June, July and August (0").
Average snowfall days
Fayetteville, IL
- Average snowfall days in January:
5.6 days - Average snowfall days in February:
4.7 days - Average snowfall days in March:
1.4 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:
0.1 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
0.9 days - Average snowfall days in December:
3.1 days
The month with the highest number of snowfall days is January (5.6 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight / Average sunshine
Fayetteville, IL
- 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 4min - Average sunshine in February:
4h and 5min - Average sunshine in March:
6h and 4min - Average sunshine in April:
8h and 4min - Average sunshine in May:
9h and 2min - Average sunshine in June:
10h and 4min
- Average sunshine in July:
10h and 3min - Average sunshine in August:
10h and 2min - Average sunshine in September:
9h and 2min - Average sunshine in October:
6h and 2min - Average sunshine in November:
5h and 4min - Average sunshine in December:
4h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days
Fayetteville, IL
- Average sunshine days in January:
20.8 days - Average sunshine days in February:
16.9 days - Average sunshine days in March:
15.8 days - Average sunshine days in April:
16 days - Average sunshine days in May:
14.6 days - Average sunshine days in June:
14.2 days
- Average sunshine days in July:
13.7 days - Average sunshine days in August:
15.7 days - Average sunshine days in September:
16.8 days - Average sunshine days in October:
20.2 days - Average sunshine days in November:
20.2 days - Average sunshine days in December:
21.7 days
The month with the most sunshine days is December (21.7 days).
The month with the least sunshine days is July (13.7 days).
Average UV index
Fayetteville, 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
Fayetteville, IL
The months with the most cloud cover are January and February (Cloud cover 49).
The months with the least cloud cover are June and August (Cloud cover 27).
Average visibility
Fayetteville, 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).
Fayetteville, Illinois, USA
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