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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
Climate and monthly weather forecast
Weather in January
January, the same as December, is an icy winter month in Chapin, Illinois, with an average temperature fluctuating between 21°F (-6.1°C) and 33.4°F (0.8°C). January stands out as Chapin's coldest month, with an average high-temperature of 33.4°F (0.8°C) and a low-temperature of 21°F (-6.1°C). Weather in January »
Weather in February
The last month of the winter, February, is also a wintry month in Chapin, Illinois, with an average temperature ranging between min 24.6°F (-4.1°C) and max 38.3°F (3.5°C). The advent of February sees the average high-temperature at a still wintry 38.3°F (3.5°C), subtly shifted from January's 33.4°F (0.8°C). Weather in February »
Weather in March
The first month of the spring, March, is a cool month in Chapin, Illinois, with an average temperature varying between 36.1°F (2.3°C) and 51.4°F (10.8°C). The beginning of March marks a shift in the average high-temperature, moving from February's wintry 38.3°F (3.5°C) to a cool 51.4°F (10.8°C). Weather in March »
Weather in April
April is a comfortable spring month in Chapin, Illinois, with temperature in the range of an average low of 46.2°F (7.9°C) and an average high of 63.3°F (17.4°C). April's arrival brings a change in high-temperatures, moving from a cool 51.4°F (10.8°C) in March to a refreshing 63.3°F (17.4°C). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in Chapin, Illinois, with an average temperature varying between 72.9°F (22.7°C) and 55.9°F (13.3°C). As May arrives, Chapin's weather shows an increase in high-temperatures, moving from April's enjoyable 63.3°F (17.4°C) to an agreeable 72.9°F (22.7°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Chapin, Illinois, with an average temperature varying between 81.5°F (27.5°C) and 64.6°F (18.1°C). A gentle upsurge in temperatures occurs as May gives way to June, with average highs shifting from a pleasant 72.9°F (22.7°C) to a warm 81.5°F (27.5°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Chapin, Illinois, with an average temperature ranging between max 83.3°F (28.5°C) and min 66.7°F (19.3°C). Chapin's July weather reaches an average high of 83.3°F (28.5°C) and an average low of 66.7°F (19.3°C), making it the warmest month. For most parts of July, the heat index is calculated to be a hot 93.2°F (34°C). Weather in July »
Weather in August
August, the last month of the summer in Chapin, is another warm month, with an average temperature ranging between max 82.6°F (28.1°C) and min 64.8°F (18.2°C). Entering August, the average high-temperature is recorded at a still warm 82.6°F (28.1°C), exhibiting a minimal shift from July's 83.3°F (28.5°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Chapin, Illinois, with temperature in the range of an average high of 77.7°F (25.4°C) and an average low of 58.6°F (14.8°C). With September's arrival, Chapin notes an average high-temperature of a still moderately hot 77.7°F (25.4°C), closely following the trend of the preceding month. Weather in September »
Weather in October
October, like September, in Chapin, Illinois, is another refreshing autumn month, with an average temperature ranging between min 47.5°F (8.6°C) and max 64°F (17.8°C). Chapin's average high-temperature decreases in October, falling from a warm 77.7°F (25.4°C) in September to a comfortable 64°F (17.8°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a fresh month in Chapin, Illinois, with an average temperature ranging between min 36°F (2.2°C) and max 50.5°F (10.3°C). The onset of November introduces a moderate change in Chapin's weather, with average high-temperatures falling from October's comfortable 64°F (17.8°C) to a cool 50.5°F (10.3°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Chapin, Illinois, with an average temperature fluctuating between 27.7°F (-2.4°C) and 39°F (3.9°C). December brings a decrease in the average high-temperature, falling from November's fresh 50.5°F (10.3°C) to a cold 39°F (3.9°C). Weather in December »
Updated: Jun 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 are the coldest months?
Chapin experiences its average lowest temperatures in January, reaching a peak of 33.4°F (0.8°C) and a minimum of 21°F (-6.1°C).
How much does it rain?
In Chapin, during the entire year, the rain falls for 148.2 days and collects up to 29.37" (746mm) of precipitation.
When does it snow?
Months with snowfall are January through April, October through December.
What is the snowiest month?
January is the month with the most snowfall. Snow falls for 9.6 days and accumulates 3.58" (91mm) of snow.
How many days does it snow?
In Chapin, Illinois, during the entire year, snow falls for 28.3 days and aggregates up to 9.76" (248mm) of snow.
What is the month with the least sunshine?
January has the least sunshine of the year, with an average of 4.3h of sunshine.
When is the lowest UV index?
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)?
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?
May through September are months without snowfall.
What is the wettest month?
The month with the most rainfall is June, when the rain falls for 15.8 days and typically aggregates up to 3.58" (91mm) of precipitation.
When are the longest days?
The month with the longest days is June, with an average of 14h and 54min of daylight.
What month has the most sunshine?
With an average of 10.3h of sunshine, June has the most sunshine of the year.
When is the highest UV index?
The months with the highest UV index are June through August, with an average maximum UV index of 6.
What time of the year is the hottest?
July is Chapin's warmest month, registering average high temperatures of 83.3°F (28.5°C) and lows of 66.7°F (19.3°C).
What is the most humid month?
The most humid month is July, with an average relative humidity of 83%.
What is the least humid month?
October is the least humid month, with an average relative humidity of 71%.
What is the driest month?
The month with the least rainfall is December, when the rain falls for 8.1 days and typically collects 1.54" (39mm) of precipitation.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 24min of daylight.
Average temperature
Chapin, IL
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (33.4°F).
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (21°F).
Average pressure
Chapin, IL
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.07"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:
29.97"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Chapin, IL
- Average wind speed in January:
10.1mph - Average wind speed in February:
10mph - Average wind speed in March:
9.9mph - Average wind speed in April:
10mph - Average wind speed in May:
8.2mph - Average wind speed in June:
7.1mph
- Average wind speed in July:
6.1mph - Average wind speed in August:
6.2mph - Average wind speed in September:
7mph - Average wind speed in October:
8.8mph - Average wind speed in November:
9.6mph - Average wind speed in December:
9.6mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity
Chapin, IL
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Chapin, IL
- Average rainfall in January:
1.69" - Average rainfall in February:
1.61" - Average rainfall in March:
2.28" - Average rainfall in April:
3.39" - Average rainfall in May:
3.46" - Average rainfall in June:
3.58"
- Average rainfall in July:
2.28" - Average rainfall in August:
2.4" - Average rainfall in September:
2.64" - Average rainfall in October:
2.72" - Average rainfall in November:
1.77" - Average rainfall in December:
1.54"
The wettest month (with the highest rainfall) is June (3.58").
The driest month (with the least rainfall) is December (1.54").
Average rainfall days
Chapin, IL
- Average rainfall days in January:
7.1 days - Average rainfall days in February:
7.1 days - Average rainfall days in March:
13.5 days - Average rainfall days in April:
15.8 days - Average rainfall days in May:
18 days - Average rainfall days in June:
15.8 days
- Average rainfall days in July:
15.8 days - Average rainfall days in August:
13.5 days - Average rainfall days in September:
11.7 days - Average rainfall days in October:
11.8 days - Average rainfall days in November:
10 days - Average rainfall days in December:
8.1 days
The month with the highest number of rainy days is May (18 days).
The months with the least rainy days are January and February (7.1 days).
Average snowfall
Chapin, IL
The month with the highest snowfall is January (3.58").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Chapin, IL
- Average snowfall days in January:
9.6 days - Average snowfall days in February:
7.2 days - Average snowfall days in March:
3.3 days - Average snowfall days in April:
0.8 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:
0.2 days - Average snowfall days in November:
2.2 days - Average snowfall days in December:
5 days
The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Chapin, 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 2min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
4h and 2min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 4min - Average sunshine in April:
8h and 2min - Average sunshine in May:
9h and 2min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
10h and 0min - Average sunshine in September:
9h and 2min - Average sunshine in October:
5h and 5min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days
Chapin, IL
- Average sunshine days in January:
15.9 days - Average sunshine days in February:
14.8 days - Average sunshine days in March:
14.1 days - Average sunshine days in April:
11.9 days - Average sunshine days in May:
11 days - Average sunshine days in June:
10.5 days
- Average sunshine days in July:
12.3 days - Average sunshine days in August:
15 days - Average sunshine days in September:
15.7 days - Average sunshine days in October:
17.3 days - Average sunshine days in November:
18.1 days - Average sunshine days in December:
18.5 days
The month with the most sunshine days is December (18.5 days).
The month with the least sunshine days is June (10.5 days).
Average UV index
Chapin, IL
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Chapin, IL
The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are June, July, August and September (Cloud cover 29).
Average visibility
Chapin, 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).