Climate and monthly weather forecast
Gridley, IL

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Weather in January

January, the same as December, in Gridley, Illinois, is another subzero cold winter month, with an average temperature ranging between min 18.5°F (-7.5°C) and max 30.4°F (-0.9°C). January, with its average high-temperature of 30.4°F (-0.9°C) and an average low-temperature of 18.5°F (-7.5°C), holds the record as the coldest month. Weather in January »

Weather in February

February, the last month of the winter in Gridley, is a wintry month, with an average temperature varying between 34.9°F (1.6°C) and 22.1°F (-5.5°C). The arrival of February sees an average high-temperature of a wintry 34.9°F (1.6°C), hardly diverging from January's 30.4°F (-0.9°C). Weather in February »

Weather in March

The first month of the spring, March, is a frosty month in Gridley, Illinois, with an average temperature varying between 33.4°F (0.8°C) and 47.8°F (8.8°C). Gridley experiences a temperature shift with the start of March, with average high-temperatures moving from an icy 34.9°F (1.6°C) in February to a chilly 47.8°F (8.8°C). Weather in March »

Weather in April

April is a refreshing spring month in Gridley, Illinois, with an average temperature varying between 59.7°F (15.4°C) and 43.9°F (6.6°C). A rise in the average high-temperature is observed during April, moving from a chilly 47.8°F (8.8°C) in March to a mild 59.7°F (15.4°C). Weather in April »

Weather in May

May, the last month of the spring in Gridley, is a pleasant month, with an average temperature fluctuating between 71.6°F (22°C) and 54.9°F (12.7°C). Gridley sees an increase in average high-temperatures during May, moving from a refreshing 59.7°F (15.4°C) in April to an agreeable 71.6°F (22°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in Gridley, Illinois, with temperature in the range of an average high of 79.5°F (26.4°C) and an average low of 62.4°F (16.9°C). The shift from May to June sees a slight increase in the average high-temperature, transitioning from a pleasant 71.6°F (22°C) to a moderately hot 79.5°F (26.4°C). Weather in June »

Weather in July

July, like June, in Gridley, Illinois, is a moderately hot summer month, with temperature in the range of an average low of 64.6°F (18.1°C) and an average high of 81°F (27.2°C). July registers as the month with the highest average temperatures, reaching 81°F (27.2°C) at its peak and 64.6°F (18.1°C) at the lowest. July's average heat index is computed to be a tropical 87.8°F (31°C). Weather in July »

Weather in August

August, the last month of the summer in Gridley, is another warm month, with an average temperature varying between 62.6°F (17°C) and 80.2°F (26.8°C). The shift to August signals an average high-temperature of a still warm 80.2°F (26.8°C), subtly varied from July's 81°F (27.2°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Gridley, Illinois, with an average temperature fluctuating between 57°F (13.9°C) and 75.7°F (24.3°C). The average high-temperature during September registers at a still moderately hot 75.7°F (24.3°C), maintaining a close resemblance to the previous month. Weather in September »

Weather in October

October, like September, in Gridley, Illinois, is another refreshing autumn month, with an average temperature ranging between max 61.9°F (16.6°C) and min 46.6°F (8.1°C). The arrival of October corresponds with a temperature reduction, down from September's moderately hot 75.7°F (24.3°C) to a comfortable 61.9°F (16.6°C). Weather in October »

Weather in November

November, the last month of the autumn in Gridley, is another chilly month, with an average temperature ranging between min 34.7°F (1.5°C) and max 47.7°F (8.7°C). The start of November comes with a reduction in the average high-temperature, receding from a comfortable 61.9°F (16.6°C) in October to a chilly 47.7°F (8.7°C). Weather in November »

Weather in December

December, the first month of the winter in Gridley, is also a wintry month, with an average temperature fluctuating between 36.5°F (2.5°C) and 25.9°F (-3.4°C). In Gridley, the beginning of December is marked by a lowered average high-temperature, shifting from November's frosty 47.7°F (8.7°C) to a cold 36.5°F (2.5°C). Weather in December »
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest month in Gridley?

Gridley, Illinois, records the coldest temperatures in January, averaging a high of 30.4°F (-0.9°C) and a low of 18.5°F (-7.5°C).

What is the driest month in Gridley?

January is the month with the least rainfall in Gridley, Illinois. Rain falls for 5.3 days and accumulates 0.94" (24mm) of precipitation.

How much does it rain in Gridley?

In Gridley, Illinois, during the entire year, the rain falls for 131.6 days and collects up to 18.86" (479mm) of precipitation.

When does it snow in Gridley?

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

When does it snow the most in Gridley?

The month with the most snowfall in Gridley, Illinois, is January, when snow falls for 10.6 days and typically aggregates up to 2.4" (61mm) of snow.

How much does it snow in Gridley?

Throughout the year, there are 30.1 snowfall days, and 9.17" (233mm) of snow is accumulated.

What is the month with the least sunshine in Gridley?

January has the least sunshine of the year, with an average of 3.8h of sunshine.

When is Daylight Saving Time (DST) in Gridley?

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

May is the month with the most rainfall. Rain falls for 16.9 days and accumulates 2.68" (68mm) of precipitation.

When it does not snow in Gridley?

May through October are months without snowfall in Gridley, Illinois.

When are the longest days in Gridley?

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

What month has the most sunshine in Gridley?

June has the most sunshine of the year in Gridley, with an average of 10h of sunshine.

When is the highest UV index in Gridley?

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

What time of the year is the hottest in Gridley?

The month of July sees the average highest temperatures in Gridley, Illinois, reaching 81°F (27.2°C) at the peak and 64.6°F (18.1°C) at the low.

What is the most humid month in Gridley?

With an average relative humidity of 85%, July is the most humid month in Gridley, Illinois.

What is the least humid month in Gridley?

October is the least humid month in Gridley, Illinois, with an average relative humidity of 71%.

What is the month with the shortest days in Gridley?

With an average of 9h and 18min of daylight, December has the shortest days of the year in Gridley, Illinois.

What is the month with the lowest UV index in Gridley?

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

Average temperature
Gridley, IL

Average temperature - Gridley, IL

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (30.4°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
Gridley, IL

Average pressure - Gridley, IL

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed
Gridley, IL

Average wind speed - Gridley, 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 (6.5mph).

Average humidity
Gridley, IL

Average humidity - Gridley, IL

The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (71%).

Average rainfall
Gridley, IL

Average rainfall - Gridley, IL

The wettest month (with the highest rainfall) is May (2.68").
The driest month (with the least rainfall) is January (0.94").

Average rainfall days
Gridley, IL

Average rainfall days - Gridley, IL

The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is February (5.1 days).

Average snowfall
Gridley, IL

Average snowfall - Gridley, IL

The month with the highest snowfall is January (2.4").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days
Gridley, IL

Average snowfall days - Gridley, 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
Gridley, IL

Average daylight / Average sunshine - Gridley, 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: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

Average sunshine days
Gridley, IL

Average sunshine days - Gridley, IL

The month with the most sunshine days is November (20 days).
The month with the least sunshine days is July (10.3 days).

Average visibility
Gridley, IL

Average visibility - Gridley, 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).

Gridley, Illinois, USA

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