Climate and monthly weather forecast
Sims, IL

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Weather in January

January, the same as December, is another cold winter month in Sims, Illinois, with temperature in the range of an average high of 37.8°F (3.2°C) and an average low of 25°F (-3.9°C). January, characterized by an average high temperature of 37.8°F (3.2°C) and a low temperature of 25°F (-3.9°C), is generally the coldest month. Weather in January »

Weather in February

The last month of the winter, February, is also a wintry month in Sims, Illinois, with temperature in the range of an average high of 42.6°F (5.9°C) and an average low of 29.1°F (-1.6°C). February brings an average high-temperature of a still wintry 42.6°F (5.9°C), showing a slight difference from January's 37.8°F (3.2°C). Weather in February »

Weather in March

March, the first month of the spring in Sims, is a cool month, with an average temperature fluctuating between 38.7°F (3.7°C) and 54.1°F (12.3°C). Sims sees an increase in the average high-temperature with the arrival of March, moving from February's icy 42.6°F (5.9°C) to a fresh 54.1°F (12.3°C). Weather in March »

Weather in April

April is a comfortable spring month in Sims, Illinois, with temperature in the range of an average high of 64.9°F (18.3°C) and an average low of 48.2°F (9°C). The onset of April brings a temperature shift, with the average high-temperature moving from a cool 54.1°F (12.3°C) in March to a comfortable 64.9°F (18.3°C). Weather in April »

Weather in May

The last month of the spring, May, is a warm month in Sims, Illinois, with an average temperature fluctuating between 58.1°F (14.5°C) and 74.5°F (23.6°C). The commencement of May sees a shift in the average high-temperature, moving from a comfortable 64.9°F (18.3°C) in April to a warm 74.5°F (23.6°C). Weather in May »

Weather in June

June, the first month of the summer in Sims, is also a moderately hot month, with an average temperature fluctuating between 66.6°F (19.2°C) and 83.3°F (28.5°C). Sims's transition into June sees a mild rise in the average high-temperature, edging from 74.5°F (23.6°C) in May to a still warm 83.3°F (28.5°C). Weather in June »

Weather in July

July, the same as June, is a moderately hot summer month in Sims, Illinois, with an average temperature fluctuating between 67.6°F (19.8°C) and 85.1°F (29.5°C). Sims, Illinois, witnesses the warmest weather in July, with temperatures averaging a high of 85.1°F (29.5°C) and a low of 67.6°F (19.8°C). In July, the heat index is evaluated at a fiery hot 96.8°F (36°C). Weather in July »

Weather in August

August, the last month of the summer in Sims, is also a moderately hot month, with an average temperature varying between 65.8°F (18.8°C) and 83.8°F (28.8°C). Sims's shift from July to August is accompanied by an average high-temperature of a still moderately hot 83.8°F (28.8°C), a slight deviation from 85.1°F (29.5°C). Weather in August »

Weather in September

September, the first month of the autumn in Sims, is also a moderately hot month, with temperature in the range of an average high of 79°F (26.1°C) and an average low of 60.4°F (15.8°C). The beginning of September records an average high-temperature of a still moderately hot 79°F (26.1°C), marking a negligible difference from August's 83.8°F (28.8°C). Weather in September »

Weather in October

October, like September, in Sims, Illinois, is another refreshing autumn month, with an average temperature ranging between min 49.6°F (9.8°C) and max 66.7°F (19.3°C). With the onset of October, Sims's average high-temperature adjusts, receding from September's moderately hot 79°F (26.1°C) to a refreshing 66.7°F (19.3°C). Weather in October »

Weather in November

November, the last month of the autumn in Sims, is another cool month, with an average temperature ranging between max 52.9°F (11.6°C) and min 38.1°F (3.4°C). Onset of November witnesses a reduction in the average high-temperature, falling from a refreshing 66.7°F (19.3°C) in October to a fresh 52.9°F (11.6°C). Weather in November »

Weather in December

The first month of the winter, December, is also a frosty month in Sims, Illinois, with an average temperature fluctuating between 43.2°F (6.2°C) and 31.1°F (-0.5°C). Sims in December demonstrates a small temperature transition, adjusting from an average high of a fresh 52.9°F (11.6°C) in November to a chilly 43.2°F (6.2°C). Weather in December »
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What part of the year is the coldest in Sims?

January, known for its average high temperature of 37.8°F (3.2°C) and an average low temperature of 25°F (-3.9°C), is the coldest month in Sims, Illinois.

How much does it rain in Sims?

In Sims, during the entire year, the rain falls for 166.4 days and collects up to 37.32" (948mm) of precipitation.

When does it snow in Sims?

January through April, November and December are months with snowfall in Sims.

When does it snow the most in Sims?

The months with the most snowfall are January and February, with an average 2.01" (51mm) of accumulated snow.

How much does it snow in Sims?

Throughout the year, in Sims, there are 21.2 snowfall days, and 6.97" (177mm) of snow is accumulated.

What is the month with the least sunshine in Sims?

The month with the least sunshine is January, with an average of 4.4h of sunshine.

When is the lowest UV index in Sims?

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

When is Daylight Saving Time (DST) in Sims?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Sims, 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 in Sims?

April is the month with the most rainfall in Sims, Illinois. Rain falls for 16.5 days and accumulates 4.96" (126mm) of precipitation.

What is the most humid month in Sims?

The months with the highest humidity in Sims are May and July, with an average relative humidity of 79%.

When it does not snow in Sims?

In Sims, snow does not fall in May through October.

What is the month with the highest UV index in Sims?

The months with the highest UV index in Sims, Illinois, are May through August, with an average maximum UV index of 6.

When are the longest days in Sims?

With an average of 14h and 48min of daylight, June has the longest days of the year.

What month has the most sunshine in Sims?

With an average of 10.5h of sunshine, June has the most sunshine of the year.

What are the warmest months in Sims?

July is the month that records the highest temperatures in Sims, with averages ranging from a high of 85.1°F (29.5°C) to a low of 67.6°F (19.8°C).

What is the driest month in Sims?

September is the month with the least rainfall. Rain falls for 13.5 days and accumulates 2.05" (52mm) of precipitation.

What is the least humid month in Sims?

October is the least humid month in Sims, with an average relative humidity of 70%.

What is the month with the shortest days in Sims?

The month with the shortest days in Sims, Illinois, is December, with an average of 9h and 30min of daylight.

Average temperature
Sims, IL

Average temperature - Sims, IL

The warmest month (with the highest average high temperature) is July (85.1°F).
The month with the lowest average high temperature is January (37.8°F).

The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (25°F).

Average pressure
Sims, IL

Average pressure - Sims, IL

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed
Sims, IL

Average wind speed - Sims, IL

The windiest months (with the highest average wind speed) are February and March (9.9mph).
The calmest month (with the lowest average wind speed) is July (5.9mph).

Average humidity
Sims, IL

Average humidity - Sims, IL

The months with the highest relative humidity are May and July (79%).
The month with the lowest relative humidity is October (70%).

Average rainfall
Sims, IL

Average rainfall - Sims, IL

The wettest month (with the highest rainfall) is April (4.96").
The driest month (with the least rainfall) is September (2.05").

Average rainfall days
Sims, IL

Average rainfall days - Sims, IL

The month with the highest number of rainy days is May (19.8 days).
The month with the least rainy days is January (8.7 days).

Average snowfall
Sims, IL

Average snowfall - Sims, IL

The months with the highest snowfall are January and February (2.01").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days
Sims, IL

Average snowfall days - Sims, IL

The month with the highest number of snowfall days is January (6.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight / Average sunshine
Sims, IL

Average daylight / Average sunshine - Sims, IL

The month with the longest days is June (Average daylight: 14h and 48min).
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 30min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).

Average sunshine days
Sims, IL

Average sunshine days - Sims, IL

The month with the most sunshine days is October (17.9 days).
The month with the least sunshine days is May (9 days).

Average UV index
Sims, IL

Average UV index - Sims, IL

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average visibility
Sims, IL

Average visibility - Sims, IL

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).

Sims, Illinois, USA

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