Climate and monthly weather forecastMattoon, WI
Climate and monthly weather forecast
Weather in January
January, like December, is another subzero cold winter month in Mattoon, Wisconsin, with an average temperature fluctuating between 22.3°F (-5.4°C) and 11.5°F (-11.4°C). Mattoon reaches its lowest average temperatures in January, measuring 22.3°F (-5.4°C) at the peak and 11.5°F (-11.4°C) at the lowest. Weather in January »Weather in February
February, the last month of the winter in Mattoon, is also a subzero cold month, with an average temperature ranging between min 12.9°F (-10.6°C) and max 25.2°F (-3.8°C). Mattoon's average high-temperature in February is a still freezing cold 25.2°F (-3.8°C), marking an insignificant difference from the 22.3°F (-5.4°C) of January. Weather in February »Weather in March
March, the first month of the spring in Mattoon, is a wintry month, with an average temperature fluctuating between 24.3°F (-4.3°C) and 38.5°F (3.6°C). March's arrival is marked by an increase in the average high-temperature, moving from a freezing cold 25.2°F (-3.8°C) in February to a wintry 38.5°F (3.6°C). Weather in March »Weather in April
April in Mattoon, Wisconsin, is a cool spring month, with an average temperature varying between 50.5°F (10.3°C) and 33.8°F (1°C). In Mattoon, the average high-temperature in April rises, from a wintry 38.5°F (3.6°C) in March, to a fresh 50.5°F (10.3°C). Weather in April »Weather in May
May, the last month of the spring in Mattoon, is a refreshing month, with temperature in the range of an average high of 64.8°F (18.2°C) and an average low of 45.1°F (7.3°C). With the onset of May, the average high-temperature slightly shifts from April's cool 50.5°F (10.3°C) to a comfortable 64.8°F (18.2°C). Weather in May »Weather in June
The first month of the summer, June, is an agreeable month in Mattoon, Wisconsin, with an average temperature fluctuating between 53.6°F (12°C) and 73°F (22.8°C). The coming of June brings a minor shift in Mattoon's weather, with average high-temperatures adjusting from May's refreshing 64.8°F (18.2°C) to an agreeable 73°F (22.8°C). Weather in June »Weather in July
July in Mattoon, Wisconsin, is a moderately hot summer month, with an average temperature varying between 59°F (15°C) and 79.3°F (26.3°C). The month of July, characterized by an average high of 79.3°F (26.3°C) and a low of 59°F (15°C), is recognized as the warmest. Weather in July »Weather in August
August, the last month of the summer in Mattoon, is another warm month, with an average temperature fluctuating between 57.9°F (14.4°C) and 77.7°F (25.4°C). A minor adjustment in Mattoon's average high-temperature is noted with the start of August, touching a still warm 77.7°F (25.4°C) from July's 79.3°F (26.3°C). Weather in August »Weather in September
The first month of the autumn, September, is also an agreeable month in Mattoon, Wisconsin, with temperature in the range of an average low of 50.7°F (10.4°C) and an average high of 70°F (21.1°C). Mattoon's progression into September involves a gentle drop in the average high-temperature, from a warm 77.7°F (25.4°C) in August to a pleasant 70°F (21.1°C). Weather in September »Weather in October
October, the same as September, is another fresh autumn month in Mattoon, Wisconsin, with temperature in the range of an average low of 40.8°F (4.9°C) and an average high of 55°F (12.8°C). October witnesses a clear temperature decrease, falling from an agreeable 70°F (21.1°C) in September to a fresh 55°F (12.8°C). Weather in October »Weather in November
The last month of the autumn, November, is also an icy month in Mattoon, Wisconsin, with an average temperature fluctuating between 40.5°F (4.7°C) and 29.5°F (-1.4°C). The shift from October to November sees a distinct decrease in the average high-temperature, dropping from a cool 55°F (12.8°C) to an icy 40.5°F (4.7°C). Weather in November »Weather in December
December, the first month of the winter in Mattoon, is also a subzero cold month, with an average temperature ranging between max 28.2°F (-2.1°C) and min 18.5°F (-7.5°C). December indicates a shift in the average high-temperature, from November's cold 40.5°F (4.7°C) to a freezing cold 28.2°F (-2.1°C). Weather in December »Updated: Feb 14, 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
January is the coldest month, exhibiting average temperatures of 22.3°F (-5.4°C) at the peak and 11.5°F (-11.4°C) at the base.
January and February, with an average relative humidity of 88%, are most humid months.
The months with the least rainfall in Mattoon are January and February Rain falls for 4.3 days and accumulates 1.02" (26mm) of rain.
Throughout the year, there are 126.9 rainfall days, and 23.03" (585mm) of precipitation is accumulated.
January through May, October through December are months with snowfall.
January is the month with the most snowfall in Mattoon. Snow falls for 15.1 days and accumulates 5.28" (134mm) of snow.
Throughout the year, in Mattoon, Wisconsin, there are 62 snowfall days, and 22.2" (564mm) of snow is accumulated.
The months with the lowest UV index in Mattoon, Wisconsin, are January, November and December, with an average maximum UV index of 1.
The month with the least sunshine is February, with an average of 3.5h of sunshine.
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 and May, with an average relative humidity of 75%, are the least humid months.
The month with the most rainfall is May, when the rain falls for 15.1 days and typically aggregates up to 3.19" (81mm) of precipitation.
In Mattoon, Wisconsin, snow does not fall in June through September.
With an average of 15h and 36min of daylight, June has the longest days of the year in Mattoon, Wisconsin.
June through August, with an average maximum UV index of 5, are months with the highest UV index in Mattoon.
With average high temperatures of 79.3°F (26.3°C) and lows of 59°F (15°C), July is the warmest month in Mattoon, Wisconsin.
With an average of 10.1h of sunshine, July has the most sunshine of the year in Mattoon, Wisconsin.
With an average of 8h and 48min of daylight, December has the shortest days of the year.
Average temperature
Mattoon, WI
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (22.3°F).
The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is January (11.5°F).
Average pressure
Mattoon, WI
- Average pressure in January:
30.08"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.97"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.95"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
29.97"Hg - Average pressure in November:
30.05"Hg - Average pressure in December:
30.07"Hg
The months with the highest atmospheric pressure are February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Mattoon, WI
- Average wind speed in January:
8.6mph - Average wind speed in February:
8.7mph - Average wind speed in March:
8.5mph - Average wind speed in April:
9.1mph - Average wind speed in May:
8.1mph - Average wind speed in June:
7.2mph
- Average wind speed in July:
6.9mph - Average wind speed in August:
6.7mph - Average wind speed in September:
7.3mph - Average wind speed in October:
8.4mph - Average wind speed in November:
8.6mph - Average wind speed in December:
8.5mph
The windiest month (with the highest average wind speed) is April (9.1mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).
Average humidity
Mattoon, WI
The months with the highest relative humidity are January and February (88%).
The months with the lowest relative humidity are April and May (75%).
Average rainfall
Mattoon, WI
- Average rainfall in January:
1.02" - Average rainfall in February:
1.02" - Average rainfall in March:
1.57" - Average rainfall in April:
2.32" - Average rainfall in May:
3.19" - Average rainfall in June:
2.72"
- Average rainfall in July:
2.4" - Average rainfall in August:
1.54" - Average rainfall in September:
1.61" - Average rainfall in October:
2.56" - Average rainfall in November:
1.54" - Average rainfall in December:
1.54"
The wettest month (with the highest rainfall) is May (3.19").
The driest months (with the least rainfall) are January and February (1.02").
Average rainfall days
Mattoon, WI
- Average rainfall days in January:
4.3 days - Average rainfall days in February:
4.3 days - Average rainfall days in March:
9.7 days - Average rainfall days in April:
13.3 days - Average rainfall days in May:
15.1 days - Average rainfall days in June:
15 days
- Average rainfall days in July:
14.5 days - Average rainfall days in August:
12.2 days - Average rainfall days in September:
11.7 days - Average rainfall days in October:
12.4 days - Average rainfall days in November:
8.1 days - Average rainfall days in December:
6.3 days
The month with the highest number of rainy days is May (15.1 days).
The months with the least rainy days are January and February (4.3 days).
Average snowfall
Mattoon, WI
- Average snowfall in January:
5.28" - Average snowfall in February:
5.12" - Average snowfall in March:
2.48" - Average snowfall in April:
2.01" - Average snowfall in May:
0.35" - Average snowfall in June:
0"
The month with the highest snowfall is January (5.28").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Mattoon, WI
- Average snowfall days in January:
15.1 days - Average snowfall days in February:
13.3 days - Average snowfall days in March:
9.1 days - Average snowfall days in April:
4.9 days - Average snowfall days in May:
0.2 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:
1 days - Average snowfall days in November:
6.9 days - Average snowfall days in December:
11.5 days
The month with the highest number of snowfall days is January (15.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Mattoon, WI
- Average daylight in January:
9h and 12min - Average daylight in February:
10h and 24min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 30min - Average daylight in May:
14h and 54min - Average daylight in June:
15h and 36min
- Average daylight in July:
15h and 12min - Average daylight in August:
14h and 0min - Average daylight in September:
12h and 30min - Average daylight in October:
10h and 54min - Average daylight in November:
9h and 36min - Average daylight in December:
8h and 48min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in January:
3h and 36min - Average sunshine in February:
3h and 30min - Average sunshine in March:
5h and 30min - Average sunshine in April:
7h and 18min - Average sunshine in May:
8h and 48min - Average sunshine in June:
9h and 24min
- Average sunshine in July:
10h and 6min - Average sunshine in August:
9h and 48min - Average sunshine in September:
8h and 24min - Average sunshine in October:
5h and 12min - Average sunshine in November:
4h and 54min - Average sunshine in December:
3h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 3h and 30min).
Average sunshine days
Mattoon, WI
- Average sunshine days in January:
15.5 days - Average sunshine days in February:
13.8 days - Average sunshine days in March:
14.7 days - Average sunshine days in April:
12.7 days - Average sunshine days in May:
13.6 days - Average sunshine days in June:
13.1 days
- Average sunshine days in July:
13.7 days - Average sunshine days in August:
15.8 days - Average sunshine days in September:
16 days - Average sunshine days in October:
15.9 days - Average sunshine days in November:
16.6 days - Average sunshine days in December:
16.5 days
The month with the most sunshine days is November (16.6 days).
The month with the least sunshine days is April (12.7 days).
Average UV index
Mattoon, WI
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover
Mattoon, WI
The months with the most cloud cover are January and February (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility
Mattoon, WI
The months with the highest visibility are March, April, May, June, July, October, November and December (6mi).
The months with the lowest visibility are January, February, August and September (5mi).
