Climate and monthly weather forecastRochelle, IL
Climate and monthly weather forecast
Weather in January
January, like December, is a freezing cold winter month in Rochelle, Illinois, with an average temperature fluctuating between 14.7°F (-9.6°C) and 27°F (-2.8°C). The coldest period is January, when temperatures fluctuate between an average high of 27°F (-2.8°C) and a low of 14.7°F (-9.6°C). Weather in January »Weather in February
The last month of the winter, February, is another freezing cold month in Rochelle, Illinois, with an average temperature fluctuating between 18.1°F (-7.7°C) and 30.9°F (-0.6°C). The arrival of February coincides with an average high-temperature of a still subzero cold 30.9°F (-0.6°C), indicating a minimal shift from January's 27°F (-2.8°C). Weather in February »Weather in March
March, the first month of the spring in Rochelle, is a chilly month, with temperature in the range of an average high of 44.4°F (6.9°C) and an average low of 30.4°F (-0.9°C). March comes with an increase, with the average high-temperature moving from a subzero cold 30.9°F (-0.6°C) in February to a frosty 44.4°F (6.9°C). Weather in March »Weather in April
April in Rochelle, Illinois, is a refreshing spring month, with an average temperature fluctuating between 40.3°F (4.6°C) and 56.8°F (13.8°C). April's arrival signals an increase in average high-temperatures, moving from March's chilly 44.4°F (6.9°C) to a refreshing 56.8°F (13.8°C). Weather in April »Weather in May
The last month of the spring, May, is an agreeable month in Rochelle, Illinois, with an average temperature fluctuating between 52°F (11.1°C) and 68.9°F (20.5°C). Rochelle sees an increase in the average high-temperature with the arrival of May, moving from April's mild 56.8°F (13.8°C) to a pleasant 68.9°F (20.5°C). Weather in May »Weather in June
The first month of the summer, June, is a warm month in Rochelle, Illinois, with temperature in the range of an average high of 77.5°F (25.3°C) and an average low of 60.4°F (15.8°C). Rochelle's June weather indicates a minor increase in high-temperatures, edging from May's pleasant 68.9°F (20.5°C) to a warm 77.5°F (25.3°C). Weather in June »Weather in July
July, the same as June, is a moderately hot summer month in Rochelle, Illinois, with an average temperature fluctuating between 63.1°F (17.3°C) and 79.9°F (26.6°C). July proves to be the warmest month, recording an average peak temperature of 79.9°F (26.6°C) and a minimum temperature of 63.1°F (17.3°C). Weather in July »Weather in August
August, the last month of the summer in Rochelle, is also a moderately hot month, with an average temperature fluctuating between 61.2°F (16.2°C) and 78.3°F (25.7°C). August ushers in an average high-temperature of a still moderately hot 78.3°F (25.7°C), aligning closely with the preceding month. Weather in August »Weather in September
The first month of the autumn, September, is also a moderately hot month in Rochelle, Illinois, with an average temperature fluctuating between 73.4°F (23°C) and 54.5°F (12.5°C). Entering September, Rochelle's average high-temperature reads a still moderately hot 73.4°F (23°C), indicating a close resemblance to the previous month's climate. Weather in September »Weather in October
October, the same as September, in Rochelle, Illinois, is another refreshing autumn month, with an average temperature fluctuating between 44.2°F (6.8°C) and 59.9°F (15.5°C). October's arrival comes with a decrease in the average high-temperature, moving from a moderately hot 73.4°F (23°C) in September to a refreshing 59.9°F (15.5°C). Weather in October »Weather in November
November, the last month of the autumn in Rochelle, is also a frosty month, with temperature in the range of an average low of 32.2°F (0.1°C) and an average high of 45.3°F (7.4°C). November signals a clear decrease in the average high-temperature, dropping from October's mild 59.9°F (15.5°C) to a chilly 45.3°F (7.4°C). Weather in November »Weather in December
The first month of the winter, December, is still a cold month in Rochelle, Illinois, with an average temperature ranging between max 32.9°F (0.5°C) and min 22.8°F (-5.1°C). Rochelle in December demonstrates a small temperature transition, adjusting from an average high of a chilly 45.3°F (7.4°C) in November to a cold 32.9°F (0.5°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
In Rochelle, Illinois, the lowest temperatures are generally noted in January, averaging a high of 27°F (-2.8°C) and a low of 14.7°F (-9.6°C).
January and July, with an average relative humidity of 85%, are most humid months in Rochelle.
In Rochelle, Illinois, during the entire year, the rain falls for 124.5 days and collects up to 14.49" (368mm) of precipitation.
January through April, October through December are months with snowfall.
The month with the most snowfall in Rochelle, Illinois, is January, when snow falls for 10.3 days and typically aggregates up to 2.2" (56mm) of snow.
Throughout the year, in Rochelle, there are 37.1 snowfall days, and 6.14" (156mm) of snow is accumulated.
January has the least sunshine of the year in Rochelle, with an average of 3.6h of sunshine.
The months with the lowest UV index in Rochelle are January and December, with an average maximum UV index of 1.
February is the month with the least rainfall in Rochelle. Rain falls for 3.8 days and accumulates 0.55" (14mm) of precipitation.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Rochelle, 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.
In Rochelle, snow does not fall in May through September.
May through August, with an average maximum UV index of 5, are months with the highest UV index in Rochelle, Illinois.
The month with the most rainfall is June, when the rain falls for 16 days and typically aggregates up to 2.13" (54mm) of precipitation.
With an average of 15h and 12min of daylight, June has the longest days of the year in Rochelle, Illinois.
With an average of 9.5h of sunshine, June has the most sunshine of the year in Rochelle, Illinois.
Rochelle, Illinois, registers the average highest temperatures during July, with peaks of 79.9°F (26.6°C) and lows of 63.1°F (17.3°C).
October is the least humid month, with an average relative humidity of 74%.
With an average of 9h and 12min of daylight, December has the shortest days of the year.
Average temperature
Rochelle, 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 (27°F).
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (14.7°F).
Average pressure
Rochelle, IL
- Average pressure in January:
30.12"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.03"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 (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Rochelle, IL
- Average wind speed in January:
10mph - Average wind speed in February:
10mph - Average wind speed in March:
9.8mph - Average wind speed in April:
10.3mph - Average wind speed in May:
8.7mph - Average wind speed in June:
7.5mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.3mph - Average wind speed in September:
7.4mph - Average wind speed in October:
9mph - Average wind speed in November:
9.8mph - Average wind speed in December:
9.4mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity
Rochelle, IL
The months with the highest relative humidity are January and July (85%).
The month with the lowest relative humidity is October (74%).
Average rainfall
Rochelle, IL
- Average rainfall in January:
0.63" - Average rainfall in February:
0.55" - Average rainfall in March:
0.79" - Average rainfall in April:
1.5" - Average rainfall in May:
2.09" - Average rainfall in June:
2.13"
- Average rainfall in July:
1.65" - Average rainfall in August:
1.26" - Average rainfall in September:
1.14" - Average rainfall in October:
1.26" - Average rainfall in November:
0.79" - Average rainfall in December:
0.71"
The wettest month (with the highest rainfall) is June (2.13").
The driest month (with the least rainfall) is February (0.55").
Average rainfall days
Rochelle, IL
- Average rainfall days in January:
4.4 days - Average rainfall days in February:
3.8 days - Average rainfall days in March:
10.8 days - Average rainfall days in April:
13.8 days - Average rainfall days in May:
15.5 days - Average rainfall days in June:
16 days
- Average rainfall days in July:
13.9 days - Average rainfall days in August:
12.4 days - Average rainfall days in September:
10.1 days - Average rainfall days in October:
10.5 days - Average rainfall days in November:
7.1 days - Average rainfall days in December:
6.2 days
The month with the highest number of rainy days is June (16 days).
The month with the least rainy days is February (3.8 days).
Average snowfall
Rochelle, IL
The month with the highest snowfall is January (2.2").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Rochelle, IL
- Average snowfall days in January:
10.3 days - Average snowfall days in February:
9.5 days - Average snowfall days in March:
5 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:
3.1 days - Average snowfall days in December:
7.7 days
The month with the highest number of snowfall days is January (10.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Rochelle, 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 36min - Average sunshine in February:
3h and 48min - Average sunshine in March:
6h and 0min - Average sunshine in April:
7h and 24min - Average sunshine in May:
8h and 18min - Average sunshine in June:
9h and 30min
- Average sunshine in July:
9h and 24min - Average sunshine in August:
9h and 24min - Average sunshine in September:
8h and 36min - Average sunshine in October:
5h and 18min - Average sunshine in November:
5h and 0min - Average sunshine in December:
3h and 54min
The month with the most sunshine is June (Average sunshine: 9h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days
Rochelle, IL
- Average sunshine days in January:
17.4 days - Average sunshine days in February:
15.7 days - Average sunshine days in March:
16.5 days - Average sunshine days in April:
14.2 days - Average sunshine days in May:
13.3 days - Average sunshine days in June:
10.9 days
- Average sunshine days in July:
12.7 days - Average sunshine days in August:
16.8 days - Average sunshine days in September:
18.5 days - Average sunshine days in October:
17.7 days - Average sunshine days in November:
19.3 days - Average sunshine days in December:
18.4 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is June (10.9 days).
Average UV index
Rochelle, IL
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Rochelle, IL
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is September (Cloud cover 34).
Average visibility
Rochelle, 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).
