Climate and monthly weather forecast
Chatsworth, IL

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Weather in January

January, the same as December, in Chatsworth, Illinois, is a freezing cold winter month, with temperature in the range of an average low of 18.5°F (-7.5°C) and an average high of 30.6°F (-0.8°C). In Chatsworth, Illinois, January records the lowest average temperatures, peaking at 30.6°F (-0.8°C) and reaching a low of 18.5°F (-7.5°C). Weather in January »

Weather in February

February, the last month of the winter in Chatsworth, is a cold month, with an average temperature ranging between min 21.7°F (-5.7°C) and max 35.1°F (1.7°C). Chatsworth's average high-temperature in February sits at a cold 35.1°F (1.7°C), showing little difference from the previous month. Weather in February »

Weather in March

March, the first month of the spring in Chatsworth, is a frosty month, with an average temperature varying between 33.4°F (0.8°C) and 47.7°F (8.7°C). In March, the average high-temperature increases from a wintry 35.1°F (1.7°C) in February to a frosty 47.7°F (8.7°C). Weather in March »

Weather in April

April in Chatsworth, Illinois, is a moderate spring month, with an average temperature varying between 43.9°F (6.6°C) and 59.7°F (15.4°C). Observing a rise in April, the average high-temperature goes from March's chilly 47.7°F (8.7°C) to a moderate 59.7°F (15.4°C). Weather in April »

Weather in May

The last month of the spring, May, is an agreeable month in Chatsworth, Illinois, with temperature in the range of an average high of 71.6°F (22°C) and an average low of 55°F (12.8°C). The rise of average high-temperatures is seen in May, with an increase from a moderate 59.7°F (15.4°C) in April to a pleasant 71.6°F (22°C). Weather in May »

Weather in June

June, the first month of the summer in Chatsworth, is a moderately hot month, with an average temperature fluctuating between 79.3°F (26.3°C) and 62.8°F (17.1°C). A minor escalation in the average high-temperature is seen with the onset of June, moving from an agreeable 71.6°F (22°C) in May 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 Chatsworth, Illinois, with an average temperature ranging between max 80.8°F (27.1°C) and min 64.6°F (18.1°C). The temperatures reach their highest averages in July, with highs of 80.8°F (27.1°C) and lows of 64.6°F (18.1°C). The heat index value during July is calculated to be 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 Chatsworth, Illinois, with temperature in the range of an average high of 79.7°F (26.5°C) and an average low of 62.6°F (17°C). Upon the beginning of August, Chatsworth's high-temperatures register at a still moderately hot 79.7°F (26.5°C), closely mirroring the preceding month. Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Chatsworth, Illinois, with an average temperature varying between 75.7°F (24.3°C) and 57.2°F (14°C). The commencement of September introduces an average high-temperature of a still moderately hot 75.7°F (24.3°C), closely mirroring the preceding month. Weather in September »

Weather in October

October, the same as September, is another refreshing autumn month in Chatsworth, Illinois, with temperature in the range of an average high of 62.2°F (16.8°C) and an average low of 46.8°F (8.2°C). The arrival of October corresponds with a temperature reduction, down from September's warm 75.7°F (24.3°C) to an enjoyable 62.2°F (16.8°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a frosty month in Chatsworth, Illinois, with an average temperature ranging between min 34.9°F (1.6°C) and max 47.8°F (8.8°C). Chatsworth in November sees a clear temperature decline, with average high-temperatures decreasing from an enjoyable 62.2°F (16.8°C) in October to a chilly 47.8°F (8.8°C). Weather in November »

Weather in December

December, the first month of the winter in Chatsworth, is also an icy month, with temperature in the range of an average high of 36.5°F (2.5°C) and an average low of 26.1°F (-3.3°C). The start of December signals a decrease in the average high-temperature, transitioning from a frosty 47.8°F (8.8°C) in November to a wintry 36.5°F (2.5°C). Weather in December »

Frequently asked questions

What are the coldest months?

With average high temperatures of 30.6°F (-0.8°C) and lows of 18.5°F (-7.5°C), January is the coldest month.

What is the driest month?

The month with the least rainfall is January, when the rain falls for 5 days and typically collects 0.79" (20mm) of precipitation.

How many days does it rain?

Throughout the year, there are 130.5 rainfall days, and 17.44" (443mm) of precipitation is accumulated.

When does it snow?

Months with snowfall are January through April, October through December.

When does it snow the most?

The month with the most snowfall is January, when snow falls for 10.6 days and typically aggregates up to 2.09" (53mm) of snow.

How many days does it snow?

In Chatsworth, during the entire year, snow falls for 30.5 days and aggregates up to 7.68" (195mm) 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.

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.

What is the wettest month?

May is the month with the most rainfall. Rain falls for 17 days and accumulates 2.56" (65mm) of precipitation.

When it does not snow in Chatsworth?

In Chatsworth, snow does not fall in May through September.

When are the longest days?

June has the longest days of the year, with an average of 15h and 0min of daylight.

What month has the most sunshine?

June has the most sunshine of the year, with an average of 9.9h of sunshine.

What are the months with the highest UV index?

The months with the highest UV index are June and July, with an average maximum UV index of 6.

What are the warmest months?

The warmest temperatures occur during July, when averages reach a peak of 80.8°F (27.1°C) and a low of 64.6°F (18.1°C).

What is the most humid month?

The most humid month in Chatsworth is July, with an average relative humidity of 86%.

What is the least humid month?

With an average relative humidity of 71%, October is the least humid month.

What is the month with the shortest days?

The month with the shortest days in Chatsworth, Illinois, is December, with an average of 9h and 18min of daylight.

What is the month with the lowest UV index?

The month with the lowest UV index is December, with an average maximum UV index of 1.

Average temperature
Chatsworth, IL

Average temperature - Chatsworth, IL

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (30.6°F).

The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).

Average pressure
Chatsworth, IL

Average pressure - Chatsworth, IL

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed
Chatsworth, IL

Average wind speed - Chatsworth, IL

The windiest month (with the highest average wind speed) is January (10.8mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).

Average humidity
Chatsworth, IL

Average humidity - Chatsworth, IL

The month with the highest relative humidity is July (86%).
The month with the lowest relative humidity is October (71%).

Average rainfall
Chatsworth, IL

Average rainfall - Chatsworth, IL

The wettest month (with the highest rainfall) is May (2.56").
The driest month (with the least rainfall) is January (0.79").

Average rainfall days
Chatsworth, IL

Average rainfall days - Chatsworth, IL

The month with the highest number of rainy days is May (17 days).
The months with the least rainy days are January and February (5 days).

Average snowfall
Chatsworth, IL

Average snowfall - Chatsworth, IL

The month with the highest snowfall is January (2.09").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days
Chatsworth, IL

Average snowfall days - Chatsworth, IL

The month with the highest number of snowfall days is January (10.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight / Average sunshine
Chatsworth, IL

Average daylight / Average sunshine - Chatsworth, IL

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

The month with the most sunshine is June (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

Average sunshine days
Chatsworth, IL

Average sunshine days - Chatsworth, IL

The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (11.4 days).

Average visibility
Chatsworth, IL

Average visibility - Chatsworth, 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).

Chatsworth, Illinois, USA

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