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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 Knoxville, Iowa, with an average temperature fluctuating between 28.6°F (-1.9°C) and 15.1°F (-9.4°C). Knoxville's January weather, with an average high temperature of 28.6°F (-1.9°C) and an average low temperature of 15.1°F (-9.4°C), tends to be the coldest of the year. Weather in January »
Weather in February
The last month of the winter, February, is a wintry month in Knoxville, Iowa, with an average temperature varying between 18.5°F (-7.5°C) and 32.5°F (0.3°C). Knoxville's average high-temperature in February is a cold 32.5°F (0.3°C), marking an insignificant difference from the 28.6°F (-1.9°C) of January. Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in Knoxville, Iowa, with an average temperature fluctuating between 32.5°F (0.3°C) and 47.8°F (8.8°C). Knoxville, Iowa, in March showcases a distinct temperature shift, moving from an average high of a cold 32.5°F (0.3°C) in February to a chilly 47.8°F (8.8°C). Weather in March »
Weather in April
April is a refreshing spring month in Knoxville, Iowa, with an average temperature fluctuating between 42.4°F (5.8°C) and 59.9°F (15.5°C). Knoxville's transition into April sees a rise in the average high-temperature, advancing from a chilly 47.8°F (8.8°C) in March to a refreshing 59.9°F (15.5°C). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in Knoxville, Iowa, with temperature in the range of an average high of 69.4°F (20.8°C) and an average low of 52.9°F (11.6°C). With the onset of May, the average high-temperature slightly shifts from April's refreshing 59.9°F (15.5°C) to a pleasant 69.4°F (20.8°C). Weather in May »
Weather in June
June, the first month of the summer in Knoxville, is a moderately hot month, with an average temperature fluctuating between 79.3°F (26.3°C) and 63.1°F (17.3°C). June marks a rise in the average high-temperature, moving from May's pleasant 69.4°F (20.8°C) to a moderately hot 79.3°F (26.3°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Knoxville, Iowa, with temperature in the range of an average high of 82.8°F (28.2°C) and an average low of 65.5°F (18.6°C). Knoxville's temperature records reveal July as the warmest month, marked by average highs of 82.8°F (28.2°C) and lows of 65.5°F (18.6°C). July's heat index is computed to be a tropical 91.4°F (33°C). Weather in July »
Weather in August
August, the last month of the summer in Knoxville, is also a moderately hot month, with an average temperature fluctuating between 62.6°F (17°C) and 81.5°F (27.5°C). The advent of August observes an average high-temperature of a still warm 81.5°F (27.5°C), nearly identical to July's 82.8°F (28.2°C). Weather in August »
Weather in September
September, the first month of the autumn in Knoxville, is still a warm month, with temperature in the range of an average high of 75.7°F (24.3°C) and an average low of 56.1°F (13.4°C). With September's onset, the weather reveals a slight temperature decrease, transitioning from 81.5°F (27.5°C) in August to a still warm 75.7°F (24.3°C). Weather in September »
Weather in October
October, the same as September, is another refreshing autumn month in Knoxville, Iowa, with an average temperature ranging between max 61.2°F (16.2°C) and min 44.8°F (7.1°C). October's onset is marked by a clear temperature decrease, falling from a moderately hot 75.7°F (24.3°C) in September to a comfortable 61.2°F (16.2°C). Weather in October »
Weather in November
November, the last month of the autumn in Knoxville, is also a frosty month, with temperature in the range of an average high of 47.1°F (8.4°C) and an average low of 32.9°F (0.5°C). In November, the meteorological conditions alter, with the average high-temperature shifting from an enjoyable 61.2°F (16.2°C) in October to a frosty 47.1°F (8.4°C). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Knoxville, Iowa, with an average temperature ranging between max 34.7°F (1.5°C) and min 23°F (-5°C). The start of December comes with a reduction in the average high-temperature, receding from a chilly 47.1°F (8.4°C) in November to a cold 34.7°F (1.5°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 part of the year is the coldest in Knoxville?
January is the coldest month, with the temperature often reaching an average high of 28.6°F (-1.9°C) and an average low of 15.1°F (-9.4°C).
What is the most humid month in Knoxville?
January is the most humid month, with an average relative humidity of 83%.
How much does it rain in Knoxville?
In Knoxville, during the entire year, the rain falls for 115.3 days and collects up to 13.31" (338mm) of precipitation.
When does it snow in Knoxville?
Months with snowfall are January through May, October through December.
When does it snow the most in Knoxville?
The month with the most snowfall is January, when snow falls for 8.7 days and typically aggregates up to 2.24" (57mm) of snow.
How much does it snow in Knoxville?
Throughout the year, there are 30.4 snowfall days, and 6.5" (165mm) of snow is accumulated.
What is the month with the least sunshine in Knoxville?
With an average of 4.3h of sunshine, January has the least sunshine of the year.
What is the month with the lowest UV index in Knoxville?
With an average maximum UV index of 1, January is the month with the lowest UV index in Knoxville.
What is the driest month in Knoxville?
The months with the least rainfall in Knoxville, Iowa, are February and December Rain falls for 3.9 days and accumulates 0.47" (12mm) of rain.
When is Daylight Saving Time (DST) in Knoxville?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Knoxville, 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 wettest month in Knoxville?
May is the month with the most rainfall in Knoxville, Iowa. Rain falls for 15.3 days and accumulates 2.24" (57mm) of precipitation.
When it does not snow in Knoxville?
In Knoxville, snow does not fall in June through September.
When are the longest days in Knoxville?
With an average of 15h and 6min of daylight, June has the longest days of the year in Knoxville.
What is the month with the highest UV index in Knoxville?
June through August, with an average maximum UV index of 6, are months with the highest UV index in Knoxville.
What are the warmest months in Knoxville?
In Knoxville, July is known for its average highest temperatures, reaching a high of 82.8°F (28.2°C) and a low of 65.5°F (18.6°C).
What month has the most sunshine in Knoxville?
July has the most sunshine of the year in Knoxville, Iowa, with an average of 10.5h of sunshine.
What is the least humid month in Knoxville?
With an average relative humidity of 71%, October is the least humid month.
What is the month with the shortest days in Knoxville?
December has the shortest days of the year in Knoxville, with an average of 9h and 18min of daylight.
Average temperature
Knoxville, IA
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (28.6°F).
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).
Average pressure
Knoxville, IA
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.14"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.93"Hg - Average pressure in June:
29.89"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:
30.09"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed
Knoxville, IA
- Average wind speed in January:
10.5mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.4mph - Average wind speed in April:
10.4mph - Average wind speed in May:
8.8mph - Average wind speed in June:
7.9mph
- Average wind speed in July:
7mph - Average wind speed in August:
6.8mph - Average wind speed in September:
8mph - Average wind speed in October:
9.5mph - Average wind speed in November:
10.3mph - Average wind speed in December:
10mph
The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).
Average humidity
Knoxville, IA
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Knoxville, IA
- Average rainfall in January:
0.51" - Average rainfall in February:
0.47" - Average rainfall in March:
0.94" - Average rainfall in April:
1.14" - Average rainfall in May:
2.24" - Average rainfall in June:
1.81"
- Average rainfall in July:
1.34" - Average rainfall in August:
1.22" - Average rainfall in September:
1.5" - Average rainfall in October:
0.94" - Average rainfall in November:
0.71" - Average rainfall in December:
0.47"
The wettest month (with the highest rainfall) is May (2.24").
The driest months (with the least rainfall) are February and December (0.47").
Average rainfall days
Knoxville, IA
- Average rainfall days in January:
4.1 days - Average rainfall days in February:
3.9 days - Average rainfall days in March:
10.2 days - Average rainfall days in April:
11.8 days - Average rainfall days in May:
15.3 days - Average rainfall days in June:
14.4 days
- Average rainfall days in July:
13.3 days - Average rainfall days in August:
11.5 days - Average rainfall days in September:
9.8 days - Average rainfall days in October:
8.9 days - Average rainfall days in November:
6.6 days - Average rainfall days in December:
5.5 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is February (3.9 days).
Average snowfall
Knoxville, IA
- Average snowfall in January:
2.24" - Average snowfall in February:
1.38" - Average snowfall in March:
0.75" - Average snowfall in April:
0.59" - Average snowfall in May:
0.2" - Average snowfall in June:
0"
The month with the highest snowfall is January (2.24").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Knoxville, IA
- Average snowfall days in January:
8.7 days - Average snowfall days in February:
7.9 days - Average snowfall days in March:
3.8 days - Average snowfall days in April:
1.1 days - Average snowfall days in May:
0.2 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:
1.8 days - Average snowfall days in December:
6.4 days
The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Knoxville, IA
- 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 5min - 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:
4h and 2min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 1min - Average sunshine in April:
8h and 1min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
10h and 3min - Average sunshine in August:
9h and 5min - Average sunshine in September:
9h and 2min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 4min - Average sunshine in December:
4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days
Knoxville, IA
- Average sunshine days in January:
20.1 days - Average sunshine days in February:
17.5 days - Average sunshine days in March:
17.7 days - Average sunshine days in April:
14.9 days - Average sunshine days in May:
12 days - Average sunshine days in June:
11.6 days
- Average sunshine days in July:
13.1 days - Average sunshine days in August:
16.3 days - Average sunshine days in September:
18.4 days - Average sunshine days in October:
19.6 days - Average sunshine days in November:
20.5 days - Average sunshine days in December:
20.5 days
The months with the most sunshine days are November and December (20.5 days).
The month with the least sunshine days is June (11.6 days).
Average UV index
Knoxville, IA
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
Knoxville, IA
The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are July, August and September (Cloud cover 29).
Average visibility
Knoxville, IA
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Knoxville, Iowa, USA
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