Climate and monthly weather forecastHanover, IL
Climate and monthly weather forecast
Weather in January
January, the same as December, in Hanover, Illinois, is another subzero cold winter month, with an average temperature fluctuating between 25.7°F (-3.5°C) and 13.1°F (-10.5°C). The coldest time of the year is January, with temperatures averaging a high of 25.7°F (-3.5°C) and a low of 13.1°F (-10.5°C). Weather in January »Weather in February
February, the last month of the winter in Hanover, is another freezing cold month, with temperature in the range of an average low of 16.2°F (-8.8°C) and an average high of 29.3°F (-1.5°C). February commences with an average high-temperature of a still freezing cold 29.3°F (-1.5°C), showing little deviation from January's 25.7°F (-3.5°C). Weather in February »Weather in March
March, the first month of the spring in Hanover, is a frosty month, with an average temperature fluctuating between 29.5°F (-1.4°C) and 44.2°F (6.8°C). The shift from February to March brings a noticeable increase in the average high-temperature, escalating from a subzero cold 29.3°F (-1.5°C) to a frosty 44.2°F (6.8°C). Weather in March »Weather in April
April is a mild spring month in Hanover, Illinois, with an average temperature ranging between min 39.7°F (4.3°C) and max 56.1°F (13.4°C). The shift into April is marked by a rise in the average high-temperature, moving from March's frosty 44.2°F (6.8°C) to a moderate 56.1°F (13.4°C). Weather in April »Weather in May
The last month of the spring, May, is an agreeable month in Hanover, Illinois, with temperature in the range of an average low of 50.7°F (10.4°C) and an average high of 68.2°F (20.1°C). Hanover's weather shows a temperature rise with the arrival of May, moving from a mild 56.1°F (13.4°C) in April to an agreeable 68.2°F (20.1°C). Weather in May »Weather in June
The first month of the summer, June, is a warm month in Hanover, Illinois, with temperature in the range of an average low of 60.1°F (15.6°C) and an average high of 77°F (25°C). With the beginning of June, Hanover's average high-temperature sees a minor increase, transitioning from an agreeable 68.2°F (20.1°C) in May to a warm 77°F (25°C). Weather in June »Weather in July
July, the same as June, is a moderately hot summer month in Hanover, Illinois, with an average temperature varying between 79.9°F (26.6°C) and 63.5°F (17.5°C). July is the warmest month of the year, registering average temperatures as high as 79.9°F (26.6°C) and as low as 63.5°F (17.5°C). Weather in July »Weather in August
August, the last month of the summer in Hanover, is also a moderately hot month, with temperature in the range of an average high of 79°F (26.1°C) and an average low of 61°F (16.1°C). August's weather records an average high-temperature of a still warm 79°F (26.1°C), showing little deviation from July. Weather in August »Weather in September
The first month of the autumn, September, is also an agreeable month in Hanover, Illinois, with temperature in the range of an average high of 73°F (22.8°C) and an average low of 54°F (12.2°C). In September, the meteorological conditions change slightly, with the average high-temperature moving from a moderately hot 79°F (26.1°C) in August to a pleasant 73°F (22.8°C). Weather in September »Weather in October
October, like September, is a moderate autumn month in Hanover, Illinois, with an average temperature varying between 59.2°F (15.1°C) and 43°F (6.1°C). Transition into October marks a drop in the average high-temperature, moving from an agreeable 73°F (22.8°C) in September to a mild 59.2°F (15.1°C). Weather in October »Weather in November
The last month of the autumn, November, is also a frosty month in Hanover, Illinois, with temperature in the range of an average low of 31.1°F (-0.5°C) and an average high of 44.8°F (7.1°C). Hanover experiences a noticeable temperature shift with the start of November, with average high-temperatures moving from a mild 59.2°F (15.1°C) in October to a chilly 44.8°F (7.1°C). Weather in November »Weather in December
The first month of the winter, December, is still a cold month in Hanover, Illinois, with temperature in the range of an average high of 32°F (0°C) and an average low of 21.6°F (-5.8°C). In December, the average high-temperature decreases from a chilly 44.8°F (7.1°C) in November to a wintry 32°F (0°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
January, with its high-temperature average of 25.7°F (-3.5°C) and a low-temperature average of 13.1°F (-10.5°C), is the coldest month in Hanover, Illinois.
With an average relative humidity of 87%, January is the most humid month in Hanover, Illinois.
The month with the least rainfall in Hanover is January, when the rain falls for 5.4 days and typically collects 1.22" (31mm) of precipitation.
In Hanover, during the entire year, the rain falls for 145.6 days and collects up to 28.9" (734mm) of precipitation.
January through April, October through December are months with snowfall in Hanover, Illinois.
The month with the most snowfall in Hanover is January, when snow falls for 10.6 days and typically aggregates up to 4.61" (117mm) of snow.
In Hanover, during the entire year, snow falls for 40.1 days and aggregates up to 16.61" (422mm) of snow.
With an average of 3.7h of sunshine, January has the least sunshine of the year in Hanover.
The months with the lowest UV index in Hanover are January and December, with an average maximum UV index of 1.
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.
May is the month with the most rainfall. Rain falls for 19.8 days and accumulates 4.13" (105mm) of precipitation.
In Hanover, snow does not fall in May through September.
June has the longest days of the year, with an average of 15h and 12min of daylight.
The warmest period in Hanover, Illinois, tends to be July, when average temperatures fluctuate between a high of 79.9°F (26.6°C) and a low of 63.5°F (17.5°C).
With an average of 9.9h of sunshine, July has the most sunshine of the year.
With an average maximum UV index of 6, July is the month with the highest UV index in Hanover.
October is the least humid month in Hanover, Illinois, with an average relative humidity of 75%.
December has the shortest days of the year in Hanover, with an average of 9h and 12min of daylight.
Average temperature
Hanover, IL
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (25.7°F).
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (13.1°F).
Average pressure
Hanover, IL
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.9"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"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed
Hanover, IL
- Average wind speed in January:
9.9mph - Average wind speed in February:
10.1mph - Average wind speed in March:
9.9mph - Average wind speed in April:
10.3mph - Average wind speed in May:
8.8mph - Average wind speed in June:
7.5mph
- Average wind speed in July:
6.7mph - Average wind speed in August:
6.6mph - Average wind speed in September:
7.6mph - Average wind speed in October:
9.2mph - Average wind speed in November:
9.9mph - Average wind speed in December:
9.6mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity
Hanover, IL
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (75%).
Average rainfall
Hanover, IL
- Average rainfall in January:
1.22" - Average rainfall in February:
1.34" - Average rainfall in March:
1.81" - Average rainfall in April:
3.39" - Average rainfall in May:
4.13" - Average rainfall in June:
3.62"
The wettest month (with the highest rainfall) is May (4.13").
The driest month (with the least rainfall) is January (1.22").
Average rainfall days
Hanover, IL
- Average rainfall days in January:
5.4 days - Average rainfall days in February:
4.5 days - Average rainfall days in March:
12 days - Average rainfall days in April:
16.3 days - Average rainfall days in May:
19.8 days - Average rainfall days in June:
17.9 days
- Average rainfall days in July:
17.5 days - Average rainfall days in August:
13.5 days - Average rainfall days in September:
12.4 days - Average rainfall days in October:
12 days - Average rainfall days in November:
7.8 days - Average rainfall days in December:
6.5 days
The month with the highest number of rainy days is May (19.8 days).
The month with the least rainy days is February (4.5 days).
Average snowfall
Hanover, IL
The month with the highest snowfall is January (4.61").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Hanover, IL
- Average snowfall days in January:
10.6 days - Average snowfall days in February:
9.3 days - Average snowfall days in March:
5.7 days - Average snowfall days in April:
1.6 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:
0.7 days - Average snowfall days in November:
3.5 days - Average snowfall days in December:
8.7 days
The month with the highest number of snowfall days is January (10.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Hanover, IL
- Average daylight in January:
9h and 30min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 36min - Average daylight in June:
15h and 12min
- Average daylight in July:
14h and 54min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 48min - Average daylight in December:
9h and 12min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
3h and 42min - Average sunshine in February:
3h and 54min - Average sunshine in March:
6h and 12min - Average sunshine in April:
7h and 30min - Average sunshine in May:
8h and 24min - Average sunshine in June:
9h and 30min
- Average sunshine in July:
9h and 54min - Average sunshine in August:
9h and 48min - Average sunshine in September:
9h and 6min - Average sunshine in October:
5h and 18min - Average sunshine in November:
5h and 6min - Average sunshine in December:
4h and 12min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Hanover, IL
- Average sunshine days in January:
16.6 days - Average sunshine days in February:
15.3 days - Average sunshine days in March:
14 days - Average sunshine days in April:
10.6 days - Average sunshine days in May:
9.5 days - Average sunshine days in June:
9.8 days
- Average sunshine days in July:
10.8 days - Average sunshine days in August:
15.5 days - Average sunshine days in September:
15.9 days - Average sunshine days in October:
16.9 days - Average sunshine days in November:
19 days - Average sunshine days in December:
17.1 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is May (9.5 days).
Average UV index
Hanover, IL
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Hanover, IL
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are August and September (Cloud cover 32).
Average visibility
Hanover, IL
The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January and July (5mi).
