Climate and monthly weather forecastRockton, IL
Climate and monthly weather forecast
Weather in January
January, the same as December, in Rockton, Illinois, is a freezing cold winter month, with an average temperature fluctuating between 12.7°F (-10.7°C) and 25.2°F (-3.8°C). In Rockton, the lowest temperatures are generally noted in January, averaging a high of 25.2°F (-3.8°C) and a low of 12.7°F (-10.7°C). Weather in January »Weather in February
February, the last month of the winter in Rockton, is another freezing cold month, with temperature in the range of an average low of 16.5°F (-8.6°C) and an average high of 29.3°F (-1.5°C). The dawn of February sees an average high-temperature of a still subzero cold 29.3°F (-1.5°C), subtly contrasting with January's 25.2°F (-3.8°C). Weather in February »Weather in March
March, the first month of the spring in Rockton, is a frosty month, with temperature in the range of an average high of 43.3°F (6.3°C) and an average low of 28.8°F (-1.8°C). March's arrival coincides with a rise in the average high-temperature, moving from February's freezing cold 29.3°F (-1.5°C) to a chilly 43.3°F (6.3°C). Weather in March »Weather in April
April in Rockton, Illinois, is a fresh spring month, with an average temperature ranging between min 38.7°F (3.7°C) and max 55°F (12.8°C). Observing a rise in April, the average high-temperature goes from March's chilly 43.3°F (6.3°C) to a fresh 55°F (12.8°C). Weather in April »Weather in May
The last month of the spring, May, is a comfortable month in Rockton, Illinois, with an average temperature fluctuating between 67.6°F (19.8°C) and 49.8°F (9.9°C). Rockton's May weather brings a rise in high-temperatures, moving from a cool 55°F (12.8°C) in April to an enjoyable 67.6°F (19.8°C). Weather in May »Weather in June
The first month of the summer, June, is a warm month in Rockton, Illinois, with an average temperature ranging between max 76.6°F (24.8°C) and min 58.6°F (14.8°C). The rise of average high-temperatures is seen in June, with an increase from an enjoyable 67.6°F (19.8°C) in May to a moderately hot 76.6°F (24.8°C). Weather in June »Weather in July
July, like June, in Rockton, Illinois, is another warm summer month, with an average temperature ranging between min 62.4°F (16.9°C) and max 79.9°F (26.6°C). With its high average temperature of 79.9°F (26.6°C) and a low of 62.4°F (16.9°C), July is regarded as the warmest month. Weather in July »Weather in August
August, the last month of the summer in Rockton, is also a moderately hot month, with an average temperature fluctuating between 78.1°F (25.6°C) and 60.3°F (15.7°C). August's average high-temperature is a still moderately hot 78.1°F (25.6°C), maintaining a close comparison with July's 79.9°F (26.6°C). Weather in August »Weather in September
The first month of the autumn, September, is still a pleasant month in Rockton, Illinois, with an average temperature varying between 53.1°F (11.7°C) and 72.3°F (22.4°C). September signals a slight drop in average high-temperature, sliding from August's moderately hot 78.1°F (25.6°C) to an agreeable 72.3°F (22.4°C). Weather in September »Weather in October
October, the same as September, in Rockton, Illinois, is a moderate autumn month, with an average temperature ranging between max 58.8°F (14.9°C) and min 42.8°F (6°C). Rockton's weather in October involves a decrease in the average high-temperature, moving down from September's pleasant 72.3°F (22.4°C) to a moderate 58.8°F (14.9°C). Weather in October »Weather in November
November, the last month of the autumn in Rockton, is also a frosty month, with an average temperature ranging between max 43.7°F (6.5°C) and min 31.1°F (-0.5°C). November's arrival witnesses a distinct drop in the average high-temperature, receding from October's moderate 58.8°F (14.9°C) to a chilly 43.7°F (6.5°C). Weather in November »Weather in December
December, the first month of the winter in Rockton, is also a wintry month, with temperature in the range of an average high of 32.4°F (0.2°C) and an average low of 21.7°F (-5.7°C). As December begins, there is a decrease in the average high-temperature, falling from a frosty 43.7°F (6.5°C) in November to an icy 32.4°F (0.2°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
Rockton experiences its average lowest temperatures in January, reaching a peak of 25.2°F (-3.8°C) and a minimum of 12.7°F (-10.7°C).
January is the most humid month, with an average relative humidity of 87%.
In Rockton, Illinois, during the entire year, the rain falls for 122.2 days and collects up to 16.42" (417mm) of precipitation.
Months with snowfall are January through April, October through December.
January is the month with the most snowfall in Rockton. Snow falls for 11.5 days and accumulates 2.52" (64mm) of snow.
Throughout the year, in Rockton, Illinois, there are 41.2 snowfall days, and 8.78" (223mm) of snow is accumulated.
The months with the least sunshine are January and February, with an average of 3.5h of sunshine.
January and December, with an average maximum UV index of 1, are months with the lowest UV index.
February and December are months with the least rain in Rockton when the rain falls for 3.5 days and typically aggregates up to 0.67" (17mm) of rain.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Rockton, 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.
The months with the lowest humidity are April and October, with an average relative humidity of 76%.
In Rockton, snow does not fall in May through September.
The month with the most rainfall is June, when the rain falls for 15.3 days and typically aggregates up to 2.28" (58mm) of precipitation.
June has the longest days of the year, with an average of 15h and 12min of daylight.
With an average maximum UV index of 6, June is the month with the highest UV index.
Rockton's July weather reaches an average high of 79.9°F (26.6°C) and an average low of 62.4°F (16.9°C), making it the warmest month.
The months with the most sunshine in Rockton are July and August, with an average of 9.5h of sunshine.
The month with the shortest days in Rockton, Illinois, is December, with an average of 9h and 6min of daylight.
Average temperature
Rockton, 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 (25.2°F).
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (12.7°F).
Average pressure
Rockton, IL
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.1"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:
29.96"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:
30.09"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Rockton, IL
- Average wind speed in January:
9.6mph - Average wind speed in February:
9.7mph - Average wind speed in March:
9.5mph - Average wind speed in April:
10.1mph - Average wind speed in May:
8.6mph - Average wind speed in June:
7.5mph
- Average wind speed in July:
6.6mph - Average wind speed in August:
6.4mph - Average wind speed in September:
7.4mph - Average wind speed in October:
8.8mph - Average wind speed in November:
9.5mph - Average wind speed in December:
9.3mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity
Rockton, IL
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and October (76%).
Average rainfall
Rockton, IL
- Average rainfall in January:
0.75" - Average rainfall in February:
0.67" - Average rainfall in March:
0.87" - Average rainfall in April:
1.73" - Average rainfall in May:
2.13" - Average rainfall in June:
2.28"
- Average rainfall in July:
2.09" - Average rainfall in August:
1.69" - Average rainfall in September:
1.22" - Average rainfall in October:
1.46" - Average rainfall in November:
0.87" - Average rainfall in December:
0.67"
The wettest month (with the highest rainfall) is June (2.28").
The driest months (with the least rainfall) are February and December (0.67").
Average rainfall days
Rockton, IL
- Average rainfall days in January:
3.1 days - Average rainfall days in February:
3.5 days - Average rainfall days in March:
9.8 days - Average rainfall days in April:
13.1 days - Average rainfall days in May:
15.3 days - Average rainfall days in June:
15.3 days
- Average rainfall days in July:
15.1 days - Average rainfall days in August:
13.7 days - Average rainfall days in September:
10.7 days - Average rainfall days in October:
10.7 days - Average rainfall days in November:
6.4 days - Average rainfall days in December:
5.5 days
The months with the highest number of rainy days are May and June (15.3 days).
The month with the least rainy days is January (3.1 days).
Average snowfall
Rockton, IL
The month with the highest snowfall is January (2.52").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Rockton, IL
- Average snowfall days in January:
11.5 days - Average snowfall days in February:
9.5 days - Average snowfall days in March:
5.3 days - Average snowfall days in April:
2.1 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:
3.8 days - Average snowfall days in December:
8.5 days
The month with the highest number of snowfall days is January (11.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Rockton, 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 54min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 48min - Average daylight in December:
9h and 6min
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 6min).
- Average sunshine in January:
3h and 30min - Average sunshine in February:
3h and 30min - Average sunshine in March:
5h and 54min - Average sunshine in April:
7h and 12min - Average sunshine in May:
8h and 18min - Average sunshine in June:
9h and 18min
- Average sunshine in July:
9h and 30min - Average sunshine in August:
9h and 30min - Average sunshine in September:
8h and 24min - Average sunshine in October:
5h and 12min - Average sunshine in November:
5h and 0min - Average sunshine in December:
3h and 48min
The months with the most sunshine are July and August (Average sunshine: 9h and 30min).
The months with the least sunshine are January and February (Average sunshine: 3h and 30min).
Average sunshine days
Rockton, IL
- Average sunshine days in January:
17.4 days - Average sunshine days in February:
15.2 days - Average sunshine days in March:
17.1 days - Average sunshine days in April:
14.2 days - Average sunshine days in May:
12.9 days - Average sunshine days in June:
12.8 days
- Average sunshine days in July:
13.1 days - Average sunshine days in August:
13.9 days - Average sunshine days in September:
17 days - Average sunshine days in October:
17.5 days - Average sunshine days in November:
19 days - Average sunshine days in December:
17.8 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is June (12.8 days).
Average UV index
Rockton, IL
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Rockton, IL
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is September (Cloud cover 35).
Average visibility
Rockton, IL
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
