Climate and monthly weather forecastMendon, IL
Climate and monthly weather forecast
Weather in January
January, like December, in Mendon, Illinois, is an icy winter month, with temperature in the range of an average high of 32.7°F (0.4°C) and an average low of 20.1°F (-6.6°C). January, with its high-temperature average of 32.7°F (0.4°C) and a low-temperature average of 20.1°F (-6.6°C), is the coldest month. Weather in January »Weather in February
February, the last month of the winter in Mendon, is another cold month, with an average temperature ranging between max 37.6°F (3.1°C) and min 24.1°F (-4.4°C). February's advent notes a subtle adjustment in average high-temperature to a still icy 37.6°F (3.1°C) from January. Weather in February »Weather in March
The first month of the spring, March, is a fresh month in Mendon, Illinois, with an average temperature varying between 50.9°F (10.5°C) and 35.1°F (1.7°C). With the onset of March, Mendon experiences a temperature shift, with the average high-temperature moving from a wintry 37.6°F (3.1°C) in February to a fresh 50.9°F (10.5°C). Weather in March »Weather in April
April is a refreshing spring month in Mendon, Illinois, with an average temperature ranging between max 62.4°F (16.9°C) and min 45.1°F (7.3°C). In Mendon, the average high-temperature in April rises, from a cool 50.9°F (10.5°C) in March, to an enjoyable 62.4°F (16.9°C). Weather in April »Weather in May
The last month of the spring, May, is an agreeable month in Mendon, Illinois, with an average temperature varying between 55.2°F (12.9°C) and 72°F (22.2°C). The shift into May is marked by a rise in the average high-temperature, moving from April's enjoyable 62.4°F (16.9°C) to a pleasant 72°F (22.2°C). Weather in May »Weather in June
The first month of the summer, June, is a warm month in Mendon, Illinois, with an average temperature varying between 81.1°F (27.3°C) and 64°F (17.8°C). June's arrival sees a rise in the average high-temperature, jumping from May's pleasant 72°F (22.2°C) to a warm 81.1°F (27.3°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in Mendon, Illinois, with an average temperature fluctuating between 83.8°F (28.8°C) and 66.6°F (19.2°C). Mendon notes the warmest temperatures in July, with a high average of 83.8°F (28.8°C) and a low of 66.6°F (19.2°C). The heat index value for July is evaluated at a hot 93.2°F (34°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Mendon, Illinois, with an average temperature ranging between max 82.9°F (28.3°C) and min 64.9°F (18.3°C). During August, the average high-temperature is a still warm 82.9°F (28.3°C), maintaining a close resemblance to that of the preceding month. Weather in August »Weather in September
September, the first month of the autumn in Mendon, is still a warm month, with an average temperature varying between 58.1°F (14.5°C) and 77.5°F (25.3°C). The commencement of September indicates a gentle shift in the average high-temperature, receding from August's warm 82.9°F (28.3°C) to a still moderately hot 77.5°F (25.3°C). Weather in September »Weather in October
October, like September, in Mendon, Illinois, is another comfortable autumn month, with an average temperature ranging between max 63.5°F (17.5°C) and min 46.8°F (8.2°C). October comes with a decrease in the average high-temperature, falling from a warm 77.5°F (25.3°C) in September to an enjoyable 63.5°F (17.5°C). Weather in October »Weather in November
November, the last month of the autumn in Mendon, is another cool month, with an average temperature varying between 35.8°F (2.1°C) and 50.2°F (10.1°C). The decrease of average high-temperatures is mild in November, with a decline from an enjoyable 63.5°F (17.5°C) in October to a cool 50.2°F (10.1°C). Weather in November »Weather in December
December, the first month of the winter in Mendon, is also an icy month, with an average temperature ranging between min 26.8°F (-2.9°C) and max 38.5°F (3.6°C). The arrival of December indicates a decrease in the average high-temperature, moving from a fresh 50.2°F (10.1°C) in November to a wintry 38.5°F (3.6°C). Weather in December »Updated: Jun 21, 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
With its average high temperature of 32.7°F (0.4°C) and a low of 20.1°F (-6.6°C), January is regarded as the coldest month in Mendon.
The months with the least rainfall are January and December Rain falls for 5 days and accumulates 1.02" (26mm) of rain.
Throughout the year, there are 134.2 rainfall days, and 23.15" (588mm) of precipitation is accumulated.
Months with snowfall are January through April, October through December.
The month with the most snowfall is January, when snow falls for 8.8 days and typically aggregates up to 2.76" (70mm) of snow.
Throughout the year, there are 27.6 snowfall days, and 7.95" (202mm) of snow is accumulated.
January has the least sunshine of the year, with an average of 4.3h of sunshine.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
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.
The month with the most rainfall is May, when the rain falls for 16.9 days and typically aggregates up to 3.35" (85mm) of precipitation.
In Mendon, snow does not fall in May through September.
June and July, with an average relative humidity of 81%, are most humid months.
The month with the longest days is June, with an average of 15h and 0min of daylight.
The months with the highest UV index are June through August, with an average maximum UV index of 6.
July temperatures tend to peak at an average high of 83.8°F (28.8°C) and dip to a low of 66.6°F (19.2°C).
With an average of 10.3h of sunshine, July has the most sunshine of the year.
October is the least humid month, with an average relative humidity of 71%.
The month with the shortest days is December, with an average of 9h and 24min of daylight.
Average temperature
Mendon, IL
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (32.7°F).
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure
Mendon, IL
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.94"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Mendon, IL
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.3mph - Average wind speed in March:
10.1mph - Average wind speed in April:
10.1mph - Average wind speed in May:
8.3mph - Average wind speed in June:
7.5mph
- Average wind speed in July:
6.4mph - Average wind speed in August:
6.5mph - Average wind speed in September:
7.2mph - Average wind speed in October:
9mph - Average wind speed in November:
9.9mph - Average wind speed in December:
9.8mph
The windiest months (with the highest average wind speed) are January and February (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.4mph).
Average humidity
Mendon, IL
The months with the highest relative humidity are June and July (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Mendon, IL
- Average rainfall in January:
1.02" - Average rainfall in February:
1.06" - Average rainfall in March:
1.93" - Average rainfall in April:
2.52" - Average rainfall in May:
3.35" - Average rainfall in June:
2.6"
- Average rainfall in July:
2.01" - Average rainfall in August:
2.01" - Average rainfall in September:
2.4" - Average rainfall in October:
1.85" - Average rainfall in November:
1.38" - Average rainfall in December:
1.02"
The wettest month (with the highest rainfall) is May (3.35").
The driest months (with the least rainfall) are January and December (1.02").
Average rainfall days
Mendon, IL
- Average rainfall days in January:
5 days - Average rainfall days in February:
5.1 days - Average rainfall days in March:
12.9 days - Average rainfall days in April:
14.6 days - Average rainfall days in May:
16.9 days - Average rainfall days in June:
16.1 days
- Average rainfall days in July:
15.3 days - Average rainfall days in August:
13 days - Average rainfall days in September:
10.4 days - Average rainfall days in October:
10.3 days - Average rainfall days in November:
8.8 days - Average rainfall days in December:
5.8 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (5 days).
Average snowfall
Mendon, IL
The month with the highest snowfall is January (2.76").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Mendon, IL
- Average snowfall days in January:
8.8 days - Average snowfall days in February:
6.6 days - Average snowfall days in March:
4.2 days - Average snowfall days in April:
0.8 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:
0.3 days - Average snowfall days in November:
1.4 days - Average snowfall days in December:
5.5 days
The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Mendon, IL
- Average daylight in January:
9h and 42min - 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:
15h and 0min
- Average daylight in July:
14h and 42min - 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: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
4h and 18min - Average sunshine in February:
4h and 30min - Average sunshine in March:
6h and 30min - Average sunshine in April:
8h and 6min - Average sunshine in May:
9h and 0min - Average sunshine in June:
10h and 12min
- Average sunshine in July:
10h and 18min - Average sunshine in August:
10h and 0min - Average sunshine in September:
9h and 24min - Average sunshine in October:
5h and 42min - Average sunshine in November:
5h and 18min - Average sunshine in December:
4h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days
Mendon, IL
- Average sunshine days in January:
18.1 days - Average sunshine days in February:
16.3 days - Average sunshine days in March:
14.4 days - Average sunshine days in April:
14.5 days - Average sunshine days in May:
12.3 days - Average sunshine days in June:
11.1 days
- Average sunshine days in July:
13.2 days - Average sunshine days in August:
16.3 days - Average sunshine days in September:
18.1 days - Average sunshine days in October:
18.7 days - Average sunshine days in November:
19.1 days - Average sunshine days in December:
19.6 days
The month with the most sunshine days is December (19.6 days).
The month with the least sunshine days is June (11.1 days).
Average UV index
Mendon, 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
Mendon, IL
The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility
Mendon, 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).
