Climate and monthly weather forecastKnoxville, IL
Climate and monthly weather forecast
Weather in January
January, the same as December, in Knoxville, Illinois, is another subzero cold winter month, with an average temperature varying between 29.5°F (-1.4°C) and 17.4°F (-8.1°C). With an average high-temperature of 29.5°F (-1.4°C) and an average low-temperature of 17.4°F (-8.1°C), January is the coldest month. Weather in January »Weather in February
The last month of the winter, February, is an icy month in Knoxville, Illinois, with an average temperature fluctuating between 34.7°F (1.5°C) and 21.2°F (-6°C). With the transition into February, Knoxville notes an average high-temperature of a cold 34.7°F (1.5°C), closely resembling January. Weather in February »Weather in March
March, the first month of the spring in Knoxville, is a frosty month, with an average temperature varying between 48°F (8.9°C) and 32.9°F (0.5°C). March marks a rise in the average high-temperature, moving from February's cold 34.7°F (1.5°C) to a frosty 48°F (8.9°C). Weather in March »Weather in April
April in Knoxville, Illinois, is a refreshing spring month, with an average temperature ranging between min 43.2°F (6.2°C) and max 59.9°F (15.5°C). April's arrival brings a change in high-temperatures, moving from a frosty 48°F (8.9°C) in March to a refreshing 59.9°F (15.5°C). Weather in April »Weather in May
May, the last month of the spring in Knoxville, is a pleasant month, with an average temperature ranging between min 54°F (12.2°C) and max 70.7°F (21.5°C). The shift from April to May sees an increase in the average high-temperature, transitioning from a mild 59.9°F (15.5°C) to an agreeable 70.7°F (21.5°C). Weather in May »Weather in June
June, the first month of the summer in Knoxville, is a warm month, with temperature in the range of an average high of 79.2°F (26.2°C) and an average low of 62.4°F (16.9°C). June comes with a subtle rise, with the average high-temperature adjusting from a pleasant 70.7°F (21.5°C) in May to a warm 79.2°F (26.2°C). Weather in June »Weather in July
July, the same as June, is a moderately hot summer month in Knoxville, Illinois, with temperature in the range of an average high of 81.1°F (27.3°C) and an average low of 64.9°F (18.3°C). With average high temperatures of 81.1°F (27.3°C) and lows of 64.9°F (18.3°C), July is the warmest month. The heat index for July is estimated at a tropical 87.8°F (31°C). Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Knoxville, Illinois, with an average temperature ranging between max 80.6°F (27°C) and min 63.3°F (17.4°C). Knoxville's average high-temperature in August sits at a still warm 80.6°F (27°C), showing little difference from the previous month. Weather in August »Weather in September
September, the first month of the autumn in Knoxville, is also a moderately hot month, with an average temperature ranging between max 75.6°F (24.2°C) and min 56.3°F (13.5°C). Knoxville's shift into September sets the average high-temperature at a still moderately hot 75.6°F (24.2°C), a figure that deviates only slightly from August's 80.6°F (27°C). Weather in September »Weather in October
October, like September, in Knoxville, Illinois, is another refreshing autumn month, with an average temperature fluctuating between 45.7°F (7.6°C) and 61.5°F (16.4°C). October brings a decrease in the average high-temperature, shifting from a moderately hot 75.6°F (24.2°C) in September to a refreshing 61.5°F (16.4°C). Weather in October »Weather in November
The last month of the autumn, November, is another chilly month in Knoxville, Illinois, with an average temperature varying between 47.5°F (8.6°C) and 33.8°F (1°C). Transition into November marks a drop in the average high-temperature, moving from a refreshing 61.5°F (16.4°C) in October to a frosty 47.5°F (8.6°C). Weather in November »Weather in December
The first month of the winter, December, is also an icy month in Knoxville, Illinois, with an average temperature varying between 24.6°F (-4.1°C) and 35.4°F (1.9°C). Onset of December witnesses a reduction in the average high-temperature, falling from a chilly 47.5°F (8.6°C) in November to a wintry 35.4°F (1.9°C). Weather in December »Updated: Jul 4, 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
With average high and low temperatures of 29.5°F (-1.4°C) and 17.4°F (-8.1°C) respectively, January is Knoxville's coldest month.
The months with the least rainfall are January and December Rain falls for 4 days and accumulates 0.47" (12mm) of rain.
In Knoxville, during the entire year, the rain falls for 109.9 days and collects up to 11.14" (283mm) of precipitation.
January through April, October through December are months with snowfall.
The month with the most snowfall in Knoxville is January, when snow falls for 8.8 days and typically aggregates up to 1.38" (35mm) of snow.
In Knoxville, during the entire year, snow falls for 28 days and aggregates up to 4.53" (115mm) of snow.
January has the least sunshine of the year, with an average of 4h of sunshine.
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.
May is the month with the most rainfall. Rain falls for 15.2 days and accumulates 1.65" (42mm) of precipitation.
In Knoxville, Illinois, snow does not fall in May through September.
June has the longest days of the year in Knoxville, Illinois, with an average of 15h and 6min of daylight.
June has the most sunshine of the year, with an average of 10.1h of sunshine.
June and July, with an average maximum UV index of 6, are months with the highest UV index.
July, with its average high-temperature of 81.1°F (27.3°C) and an average low-temperature of 64.9°F (18.3°C), holds the record as the warmest month.
With an average relative humidity of 84%, July is the most humid month.
October is the least humid month, with an average relative humidity of 72%.
December has the shortest days of the year, with an average of 9h and 18min of daylight.
December is the month with the lowest UV index, with an average maximum UV index of 1.
Average temperature
Knoxville, 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 (29.5°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 (17.4°F).
Average pressure
Knoxville, IL
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.93"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:
30.02"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.1"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
Knoxville, IL
- Average wind speed in January:
10.6mph - Average wind speed in February:
10.6mph - Average wind speed in March:
10.6mph - Average wind speed in April:
10.8mph - Average wind speed in May:
9.1mph - Average wind speed in June:
8mph
- Average wind speed in July:
6.8mph - Average wind speed in August:
6.8mph - Average wind speed in September:
7.9mph - Average wind speed in October:
9.5mph - Average wind speed in November:
10.3mph - Average wind speed in December:
9.9mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity
Knoxville, IL
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Knoxville, IL
- Average rainfall in January:
0.47" - Average rainfall in February:
0.59" - Average rainfall in March:
0.75" - Average rainfall in April:
1.3" - Average rainfall in May:
1.65" - Average rainfall in June:
1.34"
- Average rainfall in July:
1.14" - Average rainfall in August:
0.83" - Average rainfall in September:
1.02" - Average rainfall in October:
0.98" - Average rainfall in November:
0.59" - Average rainfall in December:
0.47"
The wettest month (with the highest rainfall) is May (1.65").
The driest months (with the least rainfall) are January and December (0.47").
Average rainfall days
Knoxville, IL
- Average rainfall days in January:
4 days - Average rainfall days in February:
3.9 days - Average rainfall days in March:
9.3 days - Average rainfall days in April:
11.8 days - Average rainfall days in May:
15.2 days - Average rainfall days in June:
14.5 days
- Average rainfall days in July:
12.8 days - Average rainfall days in August:
10.1 days - Average rainfall days in September:
8.7 days - Average rainfall days in October:
8.8 days - Average rainfall days in November:
6.3 days - Average rainfall days in December:
4.5 days
The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is February (3.9 days).
Average snowfall
Knoxville, IL
The month with the highest snowfall is January (1.38").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Knoxville, IL
- Average snowfall days in January:
8.8 days - Average snowfall days in February:
6.8 days - Average snowfall days in March:
3.2 days - Average snowfall days in April:
0.9 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:
0.3 days - Average snowfall days in November:
2 days - Average snowfall days in December:
6 days
The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Knoxville, IL
- Average daylight in January:
9h and 36min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 30min - Average daylight in June:
15h and 6min
- Average daylight in July:
14h and 48min - 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 54min - Average daylight in December:
9h and 18min
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:
4h and 0min - Average sunshine in February:
4h and 12min - Average sunshine in March:
6h and 24min - Average sunshine in April:
7h and 54min - Average sunshine in May:
8h and 42min - Average sunshine in June:
10h and 6min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
9h and 48min - Average sunshine in September:
9h and 12min - Average sunshine in October:
5h and 36min - Average sunshine in November:
5h and 18min - Average sunshine in December:
4h and 24min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days
Knoxville, IL
- Average sunshine days in January:
20 days - Average sunshine days in February:
18.9 days - Average sunshine days in March:
17.5 days - Average sunshine days in April:
16.3 days - Average sunshine days in May:
13.7 days - Average sunshine days in June:
12.4 days
- Average sunshine days in July:
13.2 days - Average sunshine days in August:
16.8 days - Average sunshine days in September:
18.4 days - Average sunshine days in October:
19.9 days - Average sunshine days in November:
20.5 days - Average sunshine days in December:
21.6 days
The month with the most sunshine days is December (21.6 days).
The month with the least sunshine days is June (12.4 days).
Average UV index
Knoxville, IL
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Knoxville, 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
Knoxville, IL
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
