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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, in Roscoe, Illinois, is another subzero cold winter month, with an average temperature ranging between min 13.5°F (-10.3°C) and max 25.5°F (-3.6°C). Roscoe's January weather reaches an average high of 25.5°F (-3.6°C) and an average low of 13.5°F (-10.3°C), making it the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is also a subzero cold month in Roscoe, Illinois, with an average temperature varying between 29.7°F (-1.3°C) and 16.9°F (-8.4°C). With the onset of February, the average high-temperature registers at a still subzero cold 29.7°F (-1.3°C), subtly different from January's 25.5°F (-3.6°C). Weather in February »
Weather in March
March, the first month of the spring in Roscoe, is a chilly month, with an average temperature ranging between max 43.9°F (6.6°C) and min 28.9°F (-1.7°C). As Roscoe transitions into March, the average high-temperature is observed to rise from a freezing cold 29.7°F (-1.3°C) in February to a chilly 43.9°F (6.6°C). Weather in March »
Weather in April
April is a mild spring month in Roscoe, Illinois, with an average temperature varying between 55.6°F (13.1°C) and 39°F (3.9°C). April brings a temperature change, with average high-temperatures moving from March's chilly 43.9°F (6.6°C) to a mild 55.6°F (13.1°C). Weather in April »
Weather in May
May, the last month of the spring in Roscoe, is a pleasant month, with temperature in the range of an average high of 68°F (20°C) and an average low of 50.5°F (10.3°C). May shows a rise in the average high-temperature, moving from April's moderate 55.6°F (13.1°C) to an agreeable 68°F (20°C). Weather in May »
Weather in June
June, the first month of the summer in Roscoe, is a warm month, with an average temperature fluctuating between 59.5°F (15.3°C) and 76.6°F (24.8°C). The coming of June brings a minor shift in Roscoe's weather, with average high-temperatures adjusting from May's agreeable 68°F (20°C) to a moderately hot 76.6°F (24.8°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Roscoe, Illinois, with an average temperature fluctuating between 79.9°F (26.6°C) and 63°F (17.2°C). The warmest month is July, with an average high-temperature of 79.9°F (26.6°C) and an average low-temperature of 63°F (17.2°C). Weather in July »
Weather in August
August, the last month of the summer in Roscoe, is also a moderately hot month, with an average temperature ranging between max 78.1°F (25.6°C) and min 60.4°F (15.8°C). Roscoe's August average high-temperature settles at a still warm 78.1°F (25.6°C), showing a near match with the preceding month. Weather in August »
Weather in September
The first month of the autumn, September, is still a pleasant month in Roscoe, Illinois, with an average temperature ranging between min 53.8°F (12.1°C) and max 72.3°F (22.4°C). September brings a minor shift in the average high-temperature, adjusting from a warm 78.1°F (25.6°C) in August to an agreeable 72.3°F (22.4°C). Weather in September »
Weather in October
October, like September, is a moderate autumn month in Roscoe, Illinois, with an average temperature varying between 43.3°F (6.3°C) and 59°F (15°C). The onset of October results in a decrease in the average high-temperature, receding from a pleasant 72.3°F (22.4°C) in September to a mild 59°F (15°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a frosty month in Roscoe, Illinois, with an average temperature fluctuating between 44.1°F (6.7°C) and 30.9°F (-0.6°C). As October gives way to November, the average high-temperature displays a considerable decrease, falling from a mild 59°F (15°C) to a frosty 44.1°F (6.7°C). Weather in November »
Weather in December
December, the first month of the winter in Roscoe, is still a cold month, with temperature in the range of an average low of 21.9°F (-5.6°C) and an average high of 32.4°F (0.2°C). In the transition to December, Roscoe observes a drop in the average high-temperature, moving from a frosty 44.1°F (6.7°C) in November to an icy 32.4°F (0.2°C). Weather in December »
Updated: Jul 5, 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
What month is the coldest?
Roscoe experiences its lowest temperatures in January, with an average peak of 25.5°F (-3.6°C) and a low of 13.5°F (-10.3°C).
What is the most humid month in Roscoe?
With an average relative humidity of 86%, January is the most humid month.
How much does it rain?
In Roscoe, Illinois, during the entire year, the rain falls for 123.8 days and collects up to 14.49" (368mm) of precipitation.
When does it snow?
January through April, October through December are months with snowfall.
What is the snowiest month?
January is the month with the most snowfall. Snow falls for 10.3 days and accumulates 1.93" (49mm) of snow.
How many days does it snow?
In Roscoe, during the entire year, snow falls for 38.3 days and aggregates up to 6.57" (167mm) of snow.
What are the months with the least sunshine?
The months with the least sunshine are January and February, with an average of 3.6h of sunshine.
When is the lowest UV index?
The months with the lowest UV index are January and December, with an average maximum UV index of 1.
What is the driest month?
The month with the least rainfall is February, when the rain falls for 4.4 days and typically collects 0.51" (13mm) of precipitation.
When is Daylight Saving Time (DST)?
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.
When it does not snow?
In Roscoe, snow does not fall in May through September.
What is the rainiest month?
June is the month with the most rainfall. Rain falls for 16.3 days and accumulates 2.2" (56mm) of precipitation.
When are the longest days in Roscoe?
June has the longest days of the year, with an average of 15h and 12min of daylight.
When is the highest UV index?
The month with the highest UV index is June, with an average maximum UV index of 6.
What time of the year is the hottest?
The month of July, characterized by an average high of 79.9°F (26.6°C) and a low of 63°F (17.2°C), is recognized as the warmest.
What month has the most sunshine?
The month with the most sunshine is July, with an average of 9.7h of sunshine.
What is the least humid month?
October is the least humid month, with an average relative humidity of 75%.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 6min of daylight.
Average temperature
Roscoe, 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 (25.5°F).
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure
Roscoe, IL
- Average pressure in January:
30.11"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:
29.96"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 months with the highest atmospheric pressure are January and February (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Roscoe, IL
- Average wind speed in January:
9.6mph - Average wind speed in February:
9.8mph - Average wind speed in March:
9.6mph - Average wind speed in April:
10.1mph - Average wind speed in May:
8.6mph - Average wind speed in June:
7.4mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.3mph - Average wind speed in September:
7.3mph - 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 (6.3mph).
Average humidity
Roscoe, IL
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (75%).
Average rainfall
Roscoe, IL
- Average rainfall in January:
0.59" - Average rainfall in February:
0.51" - Average rainfall in March:
0.79" - Average rainfall in April:
1.38" - Average rainfall in May:
2.09" - Average rainfall in June:
2.2"
The wettest month (with the highest rainfall) is June (2.2").
The driest month (with the least rainfall) is February (0.51").
Average rainfall days
Roscoe, IL
- Average rainfall days in January:
3.8 days - Average rainfall days in February:
4.4 days - Average rainfall days in March:
10.6 days - Average rainfall days in April:
12.9 days - Average rainfall days in May:
16.5 days - Average rainfall days in June:
16.3 days
- Average rainfall days in July:
14.5 days - Average rainfall days in August:
11.9 days - Average rainfall days in September:
10.1 days - Average rainfall days in October:
10.4 days - Average rainfall days in November:
7.1 days - Average rainfall days in December:
5.3 days
The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is January (3.8 days).
Average snowfall
Roscoe, IL
The month with the highest snowfall is January (1.93").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Roscoe, IL
- Average snowfall days in January:
10.3 days - Average snowfall days in February:
9.3 days - Average snowfall days in March:
5.9 days - Average snowfall days in April:
1.3 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 days - Average snowfall days in December:
8 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
Roscoe, IL
- Average daylight in January:
9h and 3min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
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 4min - Average sunshine in February:
3h and 4min - Average sunshine in March:
6h and 1min - Average sunshine in April:
7h and 3min - Average sunshine in May:
8h and 3min - Average sunshine in June:
9h and 2min
- Average sunshine in July:
9h and 4min - Average sunshine in August:
9h and 4min - Average sunshine in September:
8h and 4min - Average sunshine in October:
5h and 2min - Average sunshine in November:
4h and 5min - Average sunshine in December:
3h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The months with the least sunshine are January and February (Average sunshine: 3h and 36min).
Average sunshine days
Roscoe, IL
- Average sunshine days in January:
17.8 days - Average sunshine days in February:
15.8 days - Average sunshine days in March:
16.5 days - Average sunshine days in April:
13.6 days - Average sunshine days in May:
12.4 days - Average sunshine days in June:
11.4 days
- Average sunshine days in July:
12.8 days - Average sunshine days in August:
15.5 days - Average sunshine days in September:
18.1 days - Average sunshine days in October:
18 days - Average sunshine days in November:
19.7 days - Average sunshine days in December:
18.8 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is June (11.4 days).
Average UV index
Roscoe, 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
Roscoe, 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
Roscoe, 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).
Roscoe, Illinois, USA
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