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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, like December, is another subzero cold winter month in Roanoke, Illinois, with temperature in the range of an average high of 30.4°F (-0.9°C) and an average low of 18.5°F (-7.5°C). Roanoke's temperature records reveal January as the coldest month, marked by average highs of 30.4°F (-0.9°C) and lows of 18.5°F (-7.5°C). Weather in January »
Weather in February
February, the last month of the winter in Roanoke, is an icy month, with an average temperature varying between 22.3°F (-5.4°C) and 35.1°F (1.7°C). The weather during February records an average high-temperature of an icy 35.1°F (1.7°C), closely mirroring the preceding month. Weather in February »
Weather in March
March, the first month of the spring in Roanoke, is a frosty month, with an average temperature ranging between max 48.2°F (9°C) and min 33.6°F (0.9°C). As Roanoke welcomes March, the average high-temperature sees a rise, transitioning from a cold 35.1°F (1.7°C) in February to a frosty 48.2°F (9°C). Weather in March »
Weather in April
April in Roanoke, Illinois, is a refreshing spring month, with an average temperature ranging between max 60.4°F (15.8°C) and min 44.2°F (6.8°C). Roanoke, Illinois, sees an increase in average high-temperatures during April, moving from a chilly 48.2°F (9°C) in March to a mild 60.4°F (15.8°C). Weather in April »
Weather in May
May, the last month of the spring in Roanoke, is an agreeable month, with an average temperature ranging between min 55°F (12.8°C) and max 71.4°F (21.9°C). May brings a rise in the average high-temperature, transitioning from April's moderate 60.4°F (15.8°C) to an agreeable 71.4°F (21.9°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Roanoke, Illinois, with an average temperature varying between 79.5°F (26.4°C) and 63°F (17.2°C). June brings a slight elevation in the average high-temperature, transitioning from May's agreeable 71.4°F (21.9°C) to a moderately hot 79.5°F (26.4°C). Weather in June »
Weather in July
July, like June, in Roanoke, Illinois, is a moderately hot summer month, with an average temperature ranging between min 64.9°F (18.3°C) and max 81.1°F (27.3°C). In Roanoke, July is identified by the highest average temperatures, reaching a peak of 81.1°F (27.3°C) and a low of 64.9°F (18.3°C). The heat index for July is appraised at a hot 87.8°F (31°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Roanoke, Illinois, with an average temperature fluctuating between 80.2°F (26.8°C) and 63.1°F (17.3°C). August's arrival brings an average high-temperature of a still warm 80.2°F (26.8°C), slightly deviating from July's 81.1°F (27.3°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Roanoke, Illinois, with an average temperature ranging between max 75.7°F (24.3°C) and min 57°F (13.9°C). The shift into September records an average high-temperature of a still moderately hot 75.7°F (24.3°C), subtly varied from August's 80.2°F (26.8°C). Weather in September »
Weather in October
October, like September, in Roanoke, Illinois, is another comfortable autumn month, with an average temperature ranging between max 61.9°F (16.6°C) and min 46.4°F (8°C). The transition into October is accompanied by a temperature decrease, with the average high-temperature shifting from a warm 75.7°F (24.3°C) in September to a comfortable 61.9°F (16.6°C). Weather in October »
Weather in November
November, the last month of the autumn in Roanoke, is also a frosty month, with an average temperature fluctuating between 47.7°F (8.7°C) and 34.7°F (1.5°C). Roanoke's progression into November includes a drop in the average high-temperature, from a refreshing 61.9°F (16.6°C) in October to a frosty 47.7°F (8.7°C). Weather in November »
Weather in December
December, the first month of the winter in Roanoke, is also an icy month, with an average temperature ranging between min 25.9°F (-3.4°C) and max 36.5°F (2.5°C). The start of December involves a temperature drop, moving from a chilly 47.7°F (8.7°C) in November to an icy 36.5°F (2.5°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
What time of the year is the coldest in Roanoke?
January, with average temperatures reaching a high of 30.4°F (-0.9°C) and a low of 18.5°F (-7.5°C), is the coldest month in Roanoke, Illinois.
How much does it rain in Roanoke?
Throughout the year, in Roanoke, there are 147.1 rainfall days, and 24.17" (614mm) of precipitation is accumulated.
When does it snow in Roanoke?
January through April, October through December are months with snowfall in Roanoke.
When does it snow the most in Roanoke?
The months with the most snowfall in Roanoke, Illinois, are January and February, with an average 2.8" (71mm) of accumulated snow.
How much does it snow in Roanoke?
In Roanoke, during the entire year, snow falls for 34.9 days and aggregates up to 11.65" (296mm) of snow.
What is the month with the least sunshine in Roanoke?
January has the least sunshine of the year, with an average of 3.9h of sunshine.
What are the months with the lowest UV index in Roanoke?
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
When is Daylight Saving Time (DST) in Roanoke?
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.
What is the rainiest month in Roanoke?
May is the month with the most rainfall. Rain falls for 17.9 days and accumulates 3.11" (79mm) of precipitation.
When it does not snow in Roanoke?
May through September are months without snowfall in Roanoke, Illinois.
When are the longest days in Roanoke?
The month with the longest days is June, with an average of 15h and 6min of daylight.
What month has the most sunshine in Roanoke?
With an average of 10.1h of sunshine, June has the most sunshine of the year.
What are the months with the highest UV index in Roanoke?
The months with the highest UV index are June and July, with an average maximum UV index of 6.
What time of the year is the hottest in Roanoke?
July, with an average high of 81.1°F (27.3°C) and a low of 64.9°F (18.3°C), signifies the warmest month of the year.
What is the most humid month in Roanoke?
With an average relative humidity of 85%, July is the most humid month.
What is the least humid month in Roanoke?
The least humid month is October, with an average relative humidity of 72%.
What is the driest month in Roanoke?
December is the month with the least rainfall. Rain falls for 7.3 days and accumulates 1.22" (31mm) of precipitation.
What is the month with the shortest days in Roanoke?
December has the shortest days of the year in Roanoke, with an average of 9h and 18min of daylight.
Average temperature
Roanoke, IL
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (30.4°F).
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).
Average pressure
Roanoke, IL
- Average pressure in January:
30.14"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:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Roanoke, IL
- Average wind speed in January:
10.6mph - Average wind speed in February:
10.6mph - Average wind speed in March:
10.4mph - Average wind speed in April:
10.7mph - Average wind speed in May:
9mph - Average wind speed in June:
7.9mph
- Average wind speed in July:
6.6mph - Average wind speed in August:
6.5mph - Average wind speed in September:
7.6mph - Average wind speed in October:
9.4mph - Average wind speed in November:
10.2mph - Average wind speed in December:
10.1mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity
Roanoke, IL
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Roanoke, IL
- Average rainfall in January:
1.34" - Average rainfall in February:
1.34" - Average rainfall in March:
1.77" - Average rainfall in April:
2.87" - Average rainfall in May:
3.11" - Average rainfall in June:
2.64"
- Average rainfall in July:
2.24" - Average rainfall in August:
2.17" - Average rainfall in September:
1.81" - Average rainfall in October:
2.28" - Average rainfall in November:
1.38" - Average rainfall in December:
1.22"
The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is December (1.22").
Average rainfall days
Roanoke, IL
- Average rainfall days in January:
5.8 days - Average rainfall days in February:
6.1 days - Average rainfall days in March:
11.8 days - Average rainfall days in April:
15.5 days - Average rainfall days in May:
17.9 days - Average rainfall days in June:
17.1 days
- Average rainfall days in July:
17.5 days - Average rainfall days in August:
15 days - Average rainfall days in September:
12.4 days - Average rainfall days in October:
11.8 days - Average rainfall days in November:
8.9 days - Average rainfall days in December:
7.3 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is January (5.8 days).
Average snowfall
Roanoke, IL
The months with the highest snowfall are January and February (2.8").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Roanoke, IL
- Average snowfall days in January:
11 days - Average snowfall days in February:
8.3 days - Average snowfall days in March:
4.5 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:
0.4 days - Average snowfall days in November:
2.6 days - Average snowfall days in December:
6.8 days
The month with the highest number of snowfall days is January (11 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Roanoke, IL
- Average daylight in January:
9h and 4min - 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 3min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 2min
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 18min).
- Average sunshine in January:
3h and 5min - Average sunshine in February:
4h and 1min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 1min - Average sunshine in May:
9h and 0min - Average sunshine in June:
10h and 1min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
9h and 5min - Average sunshine in September:
9h and 1min - Average sunshine in October:
5h and 5min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days
Roanoke, IL
- Average sunshine days in January:
14.8 days - Average sunshine days in February:
13.8 days - Average sunshine days in March:
14.7 days - Average sunshine days in April:
11.6 days - Average sunshine days in May:
10.4 days - Average sunshine days in June:
10.3 days
- Average sunshine days in July:
9 days - Average sunshine days in August:
11.7 days - Average sunshine days in September:
15.8 days - Average sunshine days in October:
16.5 days - Average sunshine days in November:
18.4 days - Average sunshine days in December:
17.3 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is July (9 days).
Average UV index
Roanoke, IL
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Roanoke, IL
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility
Roanoke, 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).
Roanoke, Illinois, USA
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