Climate and monthly weather forecast
Atwater, IL

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Weather in January

January, the same as December, is another cold winter month in Atwater, Illinois, with an average temperature varying between 22.3°F (-5.4°C) and 34.2°F (1.2°C). January is the coldest month, with an average high-temperature of 34.2°F (1.2°C) and an average low-temperature of 22.3°F (-5.4°C). Weather in January »

Weather in February

The last month of the winter, February, is also an icy month in Atwater, Illinois, with an average temperature ranging between max 39.4°F (4.1°C) and min 25.3°F (-3.7°C). February notes an average high-temperature of a still cold 39.4°F (4.1°C), subtly differing from January's 34.2°F (1.2°C). Weather in February »

Weather in March

March, the first month of the spring in Atwater, is a cool month, with temperature in the range of an average low of 36.1°F (2.3°C) and an average high of 52°F (11.1°C). March's onset witnesses a shift in the average high-temperature, moving from a wintry 39.4°F (4.1°C) in February to a fresh 52°F (11.1°C). Weather in March »

Weather in April

April in Atwater, Illinois, is an enjoyable spring month, with an average temperature fluctuating between 63.5°F (17.5°C) and 46.4°F (8°C). Entering April, Atwater sees a temperature rise, with the average high-temperature advancing from March's cool 52°F (11.1°C) to a refreshing 63.5°F (17.5°C). Weather in April »

Weather in May

May, the last month of the spring in Atwater, is an agreeable month, with temperature in the range of an average high of 73.2°F (22.9°C) and an average low of 56.8°F (13.8°C). With the onset of May, Atwater's weather sees a temperature rise, transitioning from a comfortable 63.5°F (17.5°C) in April to an agreeable 73.2°F (22.9°C). Weather in May »

Weather in June

June, the first month of the summer in Atwater, is a moderately hot month, with temperature in the range of an average low of 64.9°F (18.3°C) and an average high of 81.7°F (27.6°C). June signifies a subtle uplift in the average high-temperature, adjusting from a pleasant 73.2°F (22.9°C) in May to a warm 81.7°F (27.6°C). Weather in June »

Weather in July

July, the same as June, is a moderately hot summer month in Atwater, Illinois, with an average temperature varying between 83.3°F (28.5°C) and 66.7°F (19.3°C). In Atwater, Illinois, July is the month with the highest recorded average temperatures, measuring a high of 83.3°F (28.5°C) and a low of 66.7°F (19.3°C). The average heat index in July is appraised at a tropical 93.2°F (34°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Atwater, Illinois, with an average temperature varying between 64.9°F (18.3°C) and 82.2°F (27.9°C). The advent of August observes an average high-temperature of a still moderately hot 82.2°F (27.9°C), nearly identical to 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 Atwater, Illinois, with an average temperature varying between 77.7°F (25.4°C) and 59.4°F (15.2°C). At the onset of September, Atwater records an average high-temperature of a still moderately hot 77.7°F (25.4°C), showing little deviation from the preceding month. Weather in September »

Weather in October

October, the same as September, is another comfortable autumn month in Atwater, Illinois, with an average temperature fluctuating between 64.4°F (18°C) and 48.2°F (9°C). The onset of October results in a decrease in the average high-temperature, receding from a moderately hot 77.7°F (25.4°C) in September to an enjoyable 64.4°F (18°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a fresh month in Atwater, Illinois, with an average temperature varying between 50.9°F (10.5°C) and 36.5°F (2.5°C). Atwater observes a minor decrease in the average high-temperature with the arrival of November, falling from October's comfortable 64.4°F (18°C) to a fresh 50.9°F (10.5°C). Weather in November »

Weather in December

The first month of the winter, December, is also an icy month in Atwater, Illinois, with an average temperature fluctuating between 28.6°F (-1.9°C) and 39.7°F (4.3°C). December's onset brings a slight change in high-temperatures, falling from a cool 50.9°F (10.5°C) in November to a wintry 39.7°F (4.3°C). Weather in December »
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the coldest in Atwater?

The lowest temperatures in Atwater are recorded in January, with averages reaching a high of 34.2°F (1.2°C) and a low of 22.3°F (-5.4°C).

How many days does it rain in Atwater?

Throughout the year, in Atwater, there are 151.5 rainfall days, and 31.3" (795mm) of precipitation is accumulated.

When does it snow in Atwater?

Months with snowfall in Atwater, Illinois, are January through April, November and December.

How much does it snow in Atwater?

Throughout the year, there are 25.5 snowfall days, and 9.09" (231mm) of snow is accumulated.

What is the month with the least sunshine in Atwater?

With an average of 4.4h of sunshine, January has the least sunshine of the year in Atwater.

What are the months with the lowest UV index in Atwater?

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

When does it snow the most in Atwater?

The month with the most snowfall is February, when snow falls for 7 days and typically aggregates up to 3.19" (81mm) of snow.

When is Daylight Saving Time (DST) in Atwater?

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 in Atwater?

In Atwater, Illinois, snow does not fall in May through October.

What is the rainiest month in Atwater?

The month with the most rainfall in Atwater, Illinois, is June, when the rain falls for 16.3 days and typically aggregates up to 3.86" (98mm) of precipitation.

When are the longest days in Atwater?

June has the longest days of the year in Atwater, Illinois, with an average of 14h and 54min of daylight.

What month has the most sunshine in Atwater?

With an average of 10.3h of sunshine, June has the most sunshine of the year.

When is the highest UV index in Atwater?

The months with the highest UV index in Atwater are June through August, with an average maximum UV index of 6.

What is the hottest time of year in Atwater?

July is the warmest month of the year, registering average temperatures as high as 83.3°F (28.5°C) and as low as 66.7°F (19.3°C).

What is the most humid month in Atwater?

July is the most humid month in Atwater, Illinois, with an average relative humidity of 82%.

What is the least humid month in Atwater?

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

What is the driest month in Atwater?

December is the month with the least rainfall in Atwater. Rain falls for 8.5 days and accumulates 1.73" (44mm) of precipitation.

What is the month with the shortest days in Atwater?

With an average of 9h and 30min of daylight, December has the shortest days of the year in Atwater.

Average temperature
Atwater, IL

Average temperature - Atwater, 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 (34.2°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 (22.3°F).

Average pressure
Atwater, IL

Average pressure - Atwater, IL

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed
Atwater, IL

Average wind speed - Atwater, IL

The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

Average humidity
Atwater, IL

Average humidity - Atwater, IL

The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (71%).

Average rainfall
Atwater, IL

Average rainfall - Atwater, IL

The wettest month (with the highest rainfall) is June (3.86").
The driest month (with the least rainfall) is December (1.73").

Average rainfall days
Atwater, IL

Average rainfall days - Atwater, IL

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (7.4 days).

Average snowfall
Atwater, IL

Average snowfall - Atwater, IL

The month with the highest snowfall is February (3.19").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days
Atwater, IL

Average snowfall days - Atwater, IL

The month with the highest number of snowfall days is January (8.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight / Average sunshine
Atwater, IL

Average daylight / Average sunshine - Atwater, IL

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 30min).

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 24min).

Average sunshine days
Atwater, IL

Average sunshine days - Atwater, IL

The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is May (10.6 days).

Average UV index
Atwater, IL

Average UV index - Atwater, 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
Atwater, IL

Average cloud cover - Atwater, 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 30).

Average visibility
Atwater, IL

Average visibility - Atwater, 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).

Atwater, Illinois, USA

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