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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 Chillicothe, Illinois, is a freezing cold winter month, with an average temperature ranging between max 29.8°F (-1.2°C) and min 18.1°F (-7.7°C). January is the coldest month, exhibiting average temperatures of 29.8°F (-1.2°C) at the peak and 18.1°F (-7.7°C) at the base. Weather in January »
Weather in February
February, the last month of the winter in Chillicothe, is a cold month, with an average temperature ranging between min 21.7°F (-5.7°C) and max 35.2°F (1.8°C). A subtle rise in the average high-temperature is observed during February, adjusting from a subzero cold 29.8°F (-1.2°C) in January to an icy 35.2°F (1.8°C). Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in Chillicothe, Illinois, with an average temperature varying between 48.2°F (9°C) and 33.3°F (0.7°C). As Chillicothe transitions into March, the average high-temperature is observed to rise from a wintry 35.2°F (1.8°C) in February to a frosty 48.2°F (9°C). Weather in March »
Weather in April
April in Chillicothe, Illinois, is a refreshing spring month, with an average temperature varying between 60.1°F (15.6°C) and 43.9°F (6.6°C). April brings a temperature change, with average high-temperatures moving from March's frosty 48.2°F (9°C) to a refreshing 60.1°F (15.6°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Chillicothe, Illinois, with temperature in the range of an average high of 71.2°F (21.8°C) and an average low of 54.1°F (12.3°C). As Chillicothe transitions into May, the average high-temperature is observed to rise from a mild 60.1°F (15.6°C) in April to a pleasant 71.2°F (21.8°C). Weather in May »
Weather in June
June, the first month of the summer in Chillicothe, is a moderately hot month, with an average temperature ranging between max 79.3°F (26.3°C) and min 62.2°F (16.8°C). The arrival of June brings a soft temperature shift, with the average high-temperature nudging from an agreeable 71.2°F (21.8°C) in May to a warm 79.3°F (26.3°C). Weather in June »
Weather in July
July, like June, in Chillicothe, Illinois, is another warm summer month, with temperature in the range of an average high of 81.9°F (27.7°C) and an average low of 64.8°F (18.2°C). Chillicothe's warmest temperatures are experienced in July, with average high temperatures of 81.9°F (27.7°C) and lows of 64.8°F (18.2°C). In July, the average heat index is computed to be a tropical 89.6°F (32°C). Weather in July »
Weather in August
August, the last month of the summer in Chillicothe, is also a moderately hot month, with temperature in the range of an average low of 63°F (17.2°C) and an average high of 80.4°F (26.9°C). The beginning of August records an average high-temperature of a still moderately hot 80.4°F (26.9°C), marking a negligible difference from July's 81.9°F (27.7°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Chillicothe, Illinois, with an average temperature varying between 56.7°F (13.7°C) and 75.9°F (24.4°C). The arrival of September coincides with an average high-temperature of a still moderately hot 75.9°F (24.4°C), indicating a minimal shift from August's 80.4°F (26.9°C). Weather in September »
Weather in October
October, like September, in Chillicothe, Illinois, is another comfortable autumn month, with an average temperature varying between 46°F (7.8°C) and 61.9°F (16.6°C). As October commences, the average high-temperature shows a reduction, transitioning from a moderately hot 75.9°F (24.4°C) in September to a comfortable 61.9°F (16.6°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Chillicothe, Illinois, with temperature in the range of an average high of 47.5°F (8.6°C) and an average low of 34.2°F (1.2°C). November signals a clear decrease in the average high-temperature, dropping from October's enjoyable 61.9°F (16.6°C) to a frosty 47.5°F (8.6°C). Weather in November »
Weather in December
December, the first month of the winter in Chillicothe, is also a wintry month, with an average temperature fluctuating between 36°F (2.2°C) and 25.7°F (-3.5°C). December's arrival correlates with a reduction in the average high-temperature, down from a frosty 47.5°F (8.6°C) in November to a cold 36°F (2.2°C). Weather in December »
Updated: Aug 27, 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?
In Chillicothe, the lowest temperatures are generally noted in January, averaging a high of 29.8°F (-1.2°C) and a low of 18.1°F (-7.7°C).
What is the driest month?
January is the month with the least rainfall. Rain falls for 4.8 days and accumulates 0.67" (17mm) of precipitation.
How many days does it rain?
Throughout the year, there are 123.4 rainfall days, and 15.12" (384mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through April, October through December.
When does it snow the most?
January is the month with the most snowfall. Snow falls for 9.2 days and accumulates 1.93" (49mm) of snow.
How much does it snow?
In Chillicothe, during the entire year, snow falls for 27.8 days and aggregates up to 6.46" (164mm) of snow.
What is the month with the least sunshine?
January has the least sunshine of the year, with an average of 3.8h of sunshine.
What are the months with the lowest UV index?
The months with the lowest UV index are January and December, with an average maximum UV index of 1.
When is Daylight Saving Time (DST) in Chillicothe?
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?
May is the month with the most rainfall. Rain falls for 16.2 days and accumulates 2.36" (60mm) of precipitation.
When it does not snow?
May through September are months without snowfall.
When are the longest days?
The month with the longest days is June, with an average of 15h and 6min of daylight.
What month has the most sunshine?
The month with the most sunshine is June, with an average of 10h of sunshine.
What are the months with the highest UV index?
June and July, with an average maximum UV index of 6, are months with the highest UV index.
What month is the hottest?
Chillicothe reaches its average highest temperatures in July, measuring 81.9°F (27.7°C) at the peak and 64.8°F (18.2°C) at the lowest.
What is the most humid month?
The most humid month is July, with an average relative humidity of 84%.
What is the least humid month?
October is the least humid month, with an average relative humidity of 72%.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 18min of daylight.
Average temperature
Chillicothe, IL
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (29.8°F).
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).
Average pressure
Chillicothe, 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:
29.97"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.01"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
Chillicothe, IL
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.3mph - Average wind speed in April:
10.6mph - Average wind speed in May:
8.9mph - Average wind speed in June:
7.8mph
- 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:
9.3mph - Average wind speed in November:
10.1mph - Average wind speed in December:
9.8mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity
Chillicothe, IL
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Chillicothe, IL
- Average rainfall in January:
0.67" - Average rainfall in February:
0.71" - Average rainfall in March:
1.1" - Average rainfall in April:
1.77" - Average rainfall in May:
2.36" - Average rainfall in June:
1.73"
- Average rainfall in July:
1.46" - Average rainfall in August:
1.26" - Average rainfall in September:
1.14" - Average rainfall in October:
1.34" - Average rainfall in November:
0.83" - Average rainfall in December:
0.75"
The wettest month (with the highest rainfall) is May (2.36").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days
Chillicothe, IL
- Average rainfall days in January:
4.8 days - Average rainfall days in February:
4.5 days - Average rainfall days in March:
11 days - Average rainfall days in April:
13.6 days - Average rainfall days in May:
16.2 days - Average rainfall days in June:
13.8 days
- Average rainfall days in July:
14.3 days - Average rainfall days in August:
11.9 days - Average rainfall days in September:
10.1 days - Average rainfall days in October:
10 days - Average rainfall days in November:
7.5 days - Average rainfall days in December:
5.7 days
The month with the highest number of rainy days is May (16.2 days).
The month with the least rainy days is February (4.5 days).
Average snowfall
Chillicothe, 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
Chillicothe, IL
- Average snowfall days in January:
9.2 days - Average snowfall days in February:
7 days - Average snowfall days in March:
2.9 days - Average snowfall days in April:
0.5 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:
0.1 days - Average snowfall days in November:
1.8 days - Average snowfall days in December:
6.3 days
The month with the highest number of snowfall days is January (9.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Chillicothe, 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 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:
3h and 5min - Average sunshine in February:
4h and 1min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 0min - Average sunshine in May:
8h and 5min - Average sunshine in June:
10h and 0min
- 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 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days
Chillicothe, IL
- Average sunshine days in January:
19.4 days - Average sunshine days in February:
17.3 days - Average sunshine days in March:
17.4 days - Average sunshine days in April:
14.7 days - Average sunshine days in May:
12.4 days - Average sunshine days in June:
13.1 days
- Average sunshine days in July:
13 days - Average sunshine days in August:
16.5 days - Average sunshine days in September:
17.8 days - Average sunshine days in October:
19 days - Average sunshine days in November:
20.2 days - Average sunshine days in December:
19.9 days
The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is May (12.4 days).
Average UV index
Chillicothe, IL
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Chillicothe, IL
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 31).
Average visibility
Chillicothe, 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).
Chillicothe, Illinois, USA
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