Climate and monthly weather forecastHillsdale, IL
Climate and monthly weather forecast
Weather in January
January, the same as December, in Hillsdale, Illinois, is a freezing cold winter month, with an average temperature varying between 27.9°F (-2.3°C) and 14.9°F (-9.5°C). The coldest temperatures occur during January, when averages reach a peak of 27.9°F (-2.3°C) and a low of 14.9°F (-9.5°C). Weather in January »Weather in February
February, the last month of the winter in Hillsdale, is an icy month, with temperature in the range of an average high of 32°F (0°C) and an average low of 18.9°F (-7.3°C). The shift into February reveals an average high-temperature of a cold 32°F (0°C), closely mirroring January's climate. Weather in February »Weather in March
The first month of the spring, March, is a frosty month in Hillsdale, Illinois, with an average temperature fluctuating between 31.6°F (-0.2°C) and 46.4°F (8°C). As Hillsdale transitions into March, a marked increase in the average high-temperature is observed, rising from an icy 32°F (0°C) in February to a frosty 46.4°F (8°C). Weather in March »Weather in April
April is a moderate spring month in Hillsdale, Illinois, with temperature in the range of an average high of 58.3°F (14.6°C) and an average low of 42.3°F (5.7°C). The onset of April brings a temperature shift, with the average high-temperature moving from a frosty 46.4°F (8°C) in March to a moderate 58.3°F (14.6°C). Weather in April »Weather in May
The last month of the spring, May, is a pleasant month in Hillsdale, Illinois, with an average temperature fluctuating between 70°F (21.1°C) and 53.1°F (11.7°C). As April gives way to May, the average high-temperature displays an increase, moving from a moderate 58.3°F (14.6°C) to an agreeable 70°F (21.1°C). Weather in May »Weather in June
The first month of the summer, June, is a warm month in Hillsdale, Illinois, with an average temperature varying between 78.6°F (25.9°C) and 61.3°F (16.3°C). Hillsdale's weather shows a minor temperature rise with the arrival of June, moving from a pleasant 70°F (21.1°C) in May to a warm 78.6°F (25.9°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in Hillsdale, Illinois, with an average temperature ranging between max 80.2°F (26.8°C) and min 64°F (17.8°C). July tends to be the warmest month, with temperatures averaging a daily high of 80.2°F (26.8°C) and a low of 64°F (17.8°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Hillsdale, Illinois, with temperature in the range of an average low of 61.9°F (16.6°C) and an average high of 79.9°F (26.6°C). As Hillsdale transitions from July to August, the average high-temperatures adjust to a still warm 79.9°F (26.6°C), nearly the same as the previous 80.2°F (26.8°C). Weather in August »Weather in September
September, the first month of the autumn in Hillsdale, is also a moderately hot month, with temperature in the range of an average low of 55.9°F (13.3°C) and an average high of 74.7°F (23.7°C). Hillsdale registers an average high-temperature of a still moderately hot 74.7°F (23.7°C) at the commencement of September, closely related to the preceding month. Weather in September »Weather in October
October, the same as September, is another refreshing autumn month in Hillsdale, Illinois, with temperature in the range of an average high of 61°F (16.1°C) and an average low of 44.6°F (7°C). The transition into October is accompanied by a temperature decrease, with the average high-temperature shifting from a moderately hot 74.7°F (23.7°C) in September to a comfortable 61°F (16.1°C). Weather in October »Weather in November
November, the last month of the autumn in Hillsdale, is another chilly month, with an average temperature fluctuating between 46.2°F (7.9°C) and 32.9°F (0.5°C). November brings with it a considerable temperature decrease, with average high-temperatures dropping from October's enjoyable 61°F (16.1°C) to a chilly 46.2°F (7.9°C). Weather in November »Weather in December
The first month of the winter, December, is still a cold month in Hillsdale, Illinois, with an average temperature ranging between min 23.5°F (-4.7°C) and max 34°F (1.1°C). Hillsdale's progression into December involves a drop in the average high-temperature, receding from a chilly 46.2°F (7.9°C) in November to a wintry 34°F (1.1°C). Weather in December »Updated: Jul 24, 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
Hillsdale reaches its average lowest temperatures in January, measuring 27.9°F (-2.3°C) at the peak and 14.9°F (-9.5°C) at the lowest.
The most humid month is January, with an average relative humidity of 85%.
The month with the least rainfall is January, when the rain falls for 6.3 days and typically collects 1.34" (34mm) of precipitation.
In Hillsdale, Illinois, during the entire year, the rain falls for 145.7 days and collects up to 27.91" (709mm) of precipitation.
Months with snowfall are January through April, October through December.
The month with the most snowfall is January, when snow falls for 11.3 days and typically aggregates up to 4.21" (107mm) of snow.
Throughout the year, there are 37.9 snowfall days, and 13.98" (355mm) of snow is accumulated.
The month with the least sunshine is January, with an average of 3.9h of sunshine.
The months with the lowest UV index 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 18.1 days and accumulates 4.41" (112mm) of precipitation.
In Hillsdale, snow does not fall in May through September.
June has the longest days of the year, with an average of 15h and 6min of daylight.
In Hillsdale, the average temperatures in July are the highest, with a peak at 80.2°F (26.8°C) and a low of 64°F (17.8°C).
July has the most sunshine of the year, with an average of 9.9h of sunshine.
The months with the highest UV index are July and August, with an average maximum UV index of 6.
The least humid month is October, with an average relative humidity of 72%.
With an average of 9h and 12min of daylight, December has the shortest days of the year.
Average temperature
Hillsdale, IL
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (27.9°F).
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (14.9°F).
Average pressure
Hillsdale, IL
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.11"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:
29.91"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.01"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 (29.91"Hg).
Average wind speed
Hillsdale, IL
- Average wind speed in January:
10.1mph - Average wind speed in February:
10.3mph - Average wind speed in March:
10.1mph - Average wind speed in April:
10.4mph - Average wind speed in May:
8.9mph - Average wind speed in June:
7.6mph
- Average wind speed in July:
6.6mph - Average wind speed in August:
6.5mph - Average wind speed in September:
7.7mph - Average wind speed in October:
9.3mph - Average wind speed in November:
10.1mph - Average wind speed in December:
9.6mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity
Hillsdale, IL
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Hillsdale, IL
- Average rainfall in January:
1.34" - Average rainfall in February:
1.38" - Average rainfall in March:
1.89" - Average rainfall in April:
3.23" - Average rainfall in May:
4.41" - Average rainfall in June:
3.23"
- Average rainfall in July:
2.72" - Average rainfall in August:
1.77" - Average rainfall in September:
2.09" - Average rainfall in October:
2.64" - Average rainfall in November:
1.81" - Average rainfall in December:
1.42"
The wettest month (with the highest rainfall) is May (4.41").
The driest month (with the least rainfall) is January (1.34").
Average rainfall days
Hillsdale, IL
- Average rainfall days in January:
6.3 days - Average rainfall days in February:
5.3 days - Average rainfall days in March:
12.3 days - Average rainfall days in April:
16.7 days - Average rainfall days in May:
18.1 days - Average rainfall days in June:
17.2 days
- Average rainfall days in July:
16 days - Average rainfall days in August:
13.2 days - Average rainfall days in September:
11.3 days - Average rainfall days in October:
12.3 days - Average rainfall days in November:
9.6 days - Average rainfall days in December:
7.4 days
The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is February (5.3 days).
Average snowfall
Hillsdale, IL
The month with the highest snowfall is January (4.21").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Hillsdale, IL
- Average snowfall days in January:
11.3 days - Average snowfall days in February:
9.6 days - Average snowfall days in March:
4.8 days - Average snowfall days in April:
1.2 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:
0.4 days - Average snowfall days in November:
2.8 days - Average snowfall days in December:
7.8 days
The month with the highest number of snowfall days is January (11.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Hillsdale, IL
- Average daylight in January:
9h and 36min - 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 30min - Average daylight in June:
15h and 6min
- Average daylight in July:
14h and 48min - 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 54min - Average daylight in December:
9h and 12min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
3h and 54min - Average sunshine in February:
4h and 6min - Average sunshine in March:
6h and 30min - Average sunshine in April:
7h and 48min - Average sunshine in May:
8h and 42min - Average sunshine in June:
9h and 42min
- Average sunshine in July:
9h and 54min - Average sunshine in August:
9h and 48min - Average sunshine in September:
9h and 12min - Average sunshine in October:
5h and 30min - Average sunshine in November:
5h and 18min - 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 54min).
Average sunshine days
Hillsdale, IL
- Average sunshine days in January:
14.8 days - Average sunshine days in February:
14.2 days - Average sunshine days in March:
14.8 days - Average sunshine days in April:
11.7 days - Average sunshine days in May:
11.2 days - Average sunshine days in June:
10.8 days
- Average sunshine days in July:
12.6 days - Average sunshine days in August:
15.7 days - Average sunshine days in September:
17.1 days - Average sunshine days in October:
16.7 days - Average sunshine days in November:
17.8 days - Average sunshine days in December:
17 days
The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is June (10.8 days).
Average UV index
Hillsdale, IL
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Hillsdale, IL
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility
Hillsdale, IL
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
