Climate and monthly weather forecastSterling, IL
Climate and monthly weather forecast
Weather in January
January, the same as December, in Sterling, Illinois, is a freezing cold winter month, with temperature in the range of an average high of 27.7°F (-2.4°C) and an average low of 14.9°F (-9.5°C). Sterling reaches its lowest average temperatures in January, measuring 27.7°F (-2.4°C) at the peak and 14.9°F (-9.5°C) at the lowest. Weather in January »Weather in February
February, the last month of the winter in Sterling, is another freezing cold month, with an average temperature ranging between min 18.5°F (-7.5°C) and max 31.6°F (-0.2°C). Sterling's February reports an average high-temperature of a still freezing cold 31.6°F (-0.2°C), exhibiting a minor difference from January. Weather in February »Weather in March
March, the first month of the spring in Sterling, is a chilly month, with an average temperature ranging between max 45.9°F (7.7°C) and min 31.3°F (-0.4°C). As March begins, there is an increase in the average high-temperature, moving from a subzero cold 31.6°F (-0.2°C) in February to a frosty 45.9°F (7.7°C). Weather in March »Weather in April
April is a moderate spring month in Sterling, Illinois, with an average temperature ranging between max 57.9°F (14.4°C) and min 41.4°F (5.2°C). As Sterling enters April, the average high-temperature increases from the a frosty 45.9°F (7.7°C) of March to a mild 57.9°F (14.4°C). Weather in April »Weather in May
May, the last month of the spring in Sterling, is a pleasant month, with temperature in the range of an average low of 52.5°F (11.4°C) and an average high of 69.4°F (20.8°C). As Sterling enters May, the average high-temperature increases from the a moderate 57.9°F (14.4°C) of April to a pleasant 69.4°F (20.8°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Sterling, Illinois, with an average temperature varying between 61.3°F (16.3°C) and 78.3°F (25.7°C). Sterling's weather in June presents a minor rise in the average high-temperature, moving from a pleasant 69.4°F (20.8°C) in May to a moderately hot 78.3°F (25.7°C). Weather in June »Weather in July
July, the same as June, is a moderately hot summer month in Sterling, Illinois, with temperature in the range of an average high of 80.2°F (26.8°C) and an average low of 63.9°F (17.7°C). With its high average temperature of 80.2°F (26.8°C) and a low of 63.9°F (17.7°C), July is regarded as the warmest month. Weather in July »Weather in August
The last month of the summer, August, is another warm month in Sterling, Illinois, with temperature in the range of an average low of 61.7°F (16.5°C) and an average high of 79.3°F (26.3°C). August commences with an average high-temperature of a still warm 79.3°F (26.3°C), showing little deviation from July's 80.2°F (26.8°C). Weather in August »Weather in September
September, the first month of the autumn in Sterling, is still a warm month, with an average temperature varying between 73.9°F (23.3°C) and 55.2°F (12.9°C). The commencement of September includes a gentle temperature shift, with the average high-temperature dropping a bit from 79.3°F (26.3°C) in August to a still moderately hot 73.9°F (23.3°C). Weather in September »Weather in October
October, the same as September, in Sterling, Illinois, is another refreshing autumn month, with an average temperature varying between 60.6°F (15.9°C) and 44.6°F (7°C). October brings a minor decrease, with the average high-temperature reducing from a warm 73.9°F (23.3°C) in September to a mild 60.6°F (15.9°C). Weather in October »Weather in November
The last month of the autumn, November, is another chilly month in Sterling, Illinois, with temperature in the range of an average low of 32.4°F (0.2°C) and an average high of 45.5°F (7.5°C). November's arrival signals a distinct temperature shift, dropping from a moderate 60.6°F (15.9°C) in October to a frosty 45.5°F (7.5°C). Weather in November »Weather in December
December, the first month of the winter in Sterling, is also a wintry month, with an average temperature fluctuating between 23.2°F (-4.9°C) and 33.8°F (1°C). December suggests a modest reduction in the average high-temperature, shifting from a chilly 45.5°F (7.5°C) in November to an icy 33.8°F (1°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
Temperature records mark January as the coldest month, with highs averaging 27.7°F (-2.4°C) and lows at 14.9°F (-9.5°C).
January and July, with an average relative humidity of 85%, are most humid months in Sterling, Illinois.
The months with the least rainfall are January and February Rain falls for 4.8 days and accumulates 0.75" (19mm) of rain.
Throughout the year, in Sterling, Illinois, there are 130.2 rainfall days, and 17.36" (441mm) of precipitation is accumulated.
Months with snowfall are January through April, October through December.
The month with the most snowfall in Sterling, Illinois, is January, when snow falls for 10.2 days and typically aggregates up to 2.56" (65mm) of snow.
In Sterling, during the entire year, snow falls for 34.2 days and aggregates up to 7.87" (200mm) of snow.
The month with the least sunshine in Sterling is January, with an average of 3.8h of sunshine.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Sterling, Illinois, 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 in Sterling. Rain falls for 17.3 days and accumulates 2.83" (72mm) of precipitation.
May through September are months without snowfall.
June has the longest days of the year, with an average of 15h and 12min of daylight.
July is the warmest month, with an average high-temperature of 80.2°F (26.8°C) and an average low-temperature of 63.9°F (17.7°C).
With an average of 9.8h of sunshine, July has the most sunshine of the year.
The month with the highest UV index in Sterling, Illinois, is July, with an average maximum UV index of 6.
With an average relative humidity of 73%, October is the least humid month.
The month with the shortest days is December, with an average of 9h and 12min of daylight.
December is the month with the lowest UV index in Sterling, Illinois, with an average maximum UV index of 1.
Average temperature
Sterling, 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 (27.7°F).
The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (14.9°F).
Average pressure
Sterling, IL
- Average pressure in January:
30.12"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 (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Sterling, IL
- Average wind speed in January:
10mph - Average wind speed in February:
10.1mph - Average wind speed in March:
9.9mph - Average wind speed in April:
10.4mph - Average wind speed in May:
8.8mph - Average wind speed in June:
7.6mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.4mph - Average wind speed in September:
7.6mph - Average wind speed in October:
9.1mph - Average wind speed in November:
9.9mph - Average wind speed in December:
9.5mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity
Sterling, IL
The months with the highest relative humidity are January and July (85%).
The month with the lowest relative humidity is October (73%).
Average rainfall
Sterling, IL
- Average rainfall in January:
0.75" - Average rainfall in February:
0.75" - Average rainfall in March:
1.1" - Average rainfall in April:
1.89" - Average rainfall in May:
2.83" - Average rainfall in June:
2.13"
- Average rainfall in July:
1.81" - Average rainfall in August:
1.34" - Average rainfall in September:
1.26" - Average rainfall in October:
1.65" - Average rainfall in November:
1.02" - Average rainfall in December:
0.83"
The wettest month (with the highest rainfall) is May (2.83").
The driest months (with the least rainfall) are January and February (0.75").
Average rainfall days
Sterling, IL
- Average rainfall days in January:
4.8 days - Average rainfall days in February:
5 days - Average rainfall days in March:
11.1 days - Average rainfall days in April:
14.8 days - Average rainfall days in May:
17.3 days - Average rainfall days in June:
16.5 days
- Average rainfall days in July:
14.1 days - Average rainfall days in August:
12.5 days - Average rainfall days in September:
9.7 days - Average rainfall days in October:
10.8 days - Average rainfall days in November:
7.9 days - Average rainfall days in December:
5.7 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (4.8 days).
Average snowfall
Sterling, IL
The month with the highest snowfall is January (2.56").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Sterling, IL
- Average snowfall days in January:
10.2 days - Average snowfall days in February:
8.2 days - Average snowfall days in March:
4.4 days - Average snowfall days in April:
1 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:
0.5 days - Average snowfall days in November:
2.5 days - Average snowfall days in December:
7.4 days
The month with the highest number of snowfall days is January (10.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Sterling, 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 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 48min - Average sunshine in February:
4h and 0min - Average sunshine in March:
6h and 24min - Average sunshine in April:
7h and 42min - Average sunshine in May:
8h and 36min - Average sunshine in June:
9h and 42min
- Average sunshine in July:
9h and 48min - Average sunshine in August:
9h and 42min - Average sunshine in September:
9h and 6min - Average sunshine in October:
5h and 30min - Average sunshine in November:
5h and 12min - Average sunshine in December:
4h and 6min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days
Sterling, IL
- Average sunshine days in January:
17 days - Average sunshine days in February:
16.2 days - Average sunshine days in March:
16.7 days - Average sunshine days in April:
13.1 days - Average sunshine days in May:
11.4 days - Average sunshine days in June:
11.3 days
- Average sunshine days in July:
12.7 days - Average sunshine days in August:
15.8 days - Average sunshine days in September:
18.4 days - Average sunshine days in October:
18.6 days - Average sunshine days in November:
18.8 days - Average sunshine days in December:
18.8 days
The months with the most sunshine days are November and December (18.8 days).
The month with the least sunshine days is June (11.3 days).
Average UV index
Sterling, IL
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Sterling, IL
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 31).
Average visibility
Sterling, IL
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
