Climate and monthly weather forecast
Geneva, IL

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Weather in January

January, like December, is another subzero cold winter month in Geneva, Illinois, with an average temperature varying between 27.9°F (-2.3°C) and 16.2°F (-8.8°C). Geneva's coldest temperatures are experienced in January, with average high temperatures of 27.9°F (-2.3°C) and lows of 16.2°F (-8.8°C). Weather in January »

Weather in February

The last month of the winter, February, is also a subzero cold month in Geneva, Illinois, with an average temperature varying between 31.8°F (-0.1°C) and 19°F (-7.2°C). Geneva's February reports an average high-temperature of a still subzero cold 31.8°F (-0.1°C), exhibiting a minor difference from January. Weather in February »

Weather in March

The first month of the spring, March, is a frosty month in Geneva, Illinois, with an average temperature ranging between min 30.6°F (-0.8°C) and max 44.8°F (7.1°C). March indicates a change in the average high-temperature, moving up from a subzero cold 31.8°F (-0.1°C) in February to a frosty 44.8°F (7.1°C). Weather in March »

Weather in April

April is a refreshing spring month in Geneva, Illinois, with an average temperature ranging between max 56.1°F (13.4°C) and min 40.1°F (4.5°C). In Geneva, the average high-temperature in April increases from a frosty 44.8°F (7.1°C) in March to a mild 56.1°F (13.4°C). Weather in April »

Weather in May

May, the last month of the spring in Geneva, is a pleasant month, with temperature in the range of an average low of 51.4°F (10.8°C) and an average high of 68.2°F (20.1°C). Geneva sees an increase in the average high-temperature with the arrival of May, moving from April's refreshing 56.1°F (13.4°C) to a pleasant 68.2°F (20.1°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in Geneva, Illinois, with temperature in the range of an average high of 77.5°F (25.3°C) and an average low of 60.1°F (15.6°C). Geneva sees an increase in the average high-temperature with the arrival of June, moving from May's agreeable 68.2°F (20.1°C) to a moderately hot 77.5°F (25.3°C). Weather in June »

Weather in July

July, like June, in Geneva, Illinois, is a moderately hot summer month, with an average temperature fluctuating between 64.2°F (17.9°C) and 81°F (27.2°C). With an average high-temperature of 81°F (27.2°C) and an average low-temperature of 64.2°F (17.9°C), July is the warmest month. July's mean heat index is estimated at a tropical 86°F (30°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Geneva, Illinois, with temperature in the range of an average low of 62.8°F (17.1°C) and an average high of 79.5°F (26.4°C). The transition from July to August sees an average high-temperature of a still moderately hot 79.5°F (26.4°C), indicating a minor variance from the prior month. Weather in August »

Weather in September

September, the first month of the autumn in Geneva, is still a warm month, with temperature in the range of an average low of 56.5°F (13.6°C) and an average high of 73.4°F (23°C). As August shifts into September, a minor alteration in temperatures is observed, with average highs reducing from a moderately hot 79.5°F (26.4°C) to a still warm 73.4°F (23°C). Weather in September »

Weather in October

October, the same as September, in Geneva, Illinois, is another mild autumn month, with temperature in the range of an average low of 44.8°F (7.1°C) and an average high of 60.3°F (15.7°C). A decrease in the average high-temperature is observed during October, shifting from a moderately hot 73.4°F (23°C) in September to a refreshing 60.3°F (15.7°C). Weather in October »

Weather in November

The last month of the autumn, November, is another chilly month in Geneva, Illinois, with temperature in the range of an average low of 32.7°F (0.4°C) and an average high of 45.5°F (7.5°C). Geneva in November showcases a distinct temperature shift, moving from an average high of a moderate 60.3°F (15.7°C) in October to a frosty 45.5°F (7.5°C). Weather in November »

Weather in December

The first month of the winter, December, is also a wintry month in Geneva, Illinois, with an average temperature ranging between max 34.2°F (1.2°C) and min 23.5°F (-4.7°C). December's arrival corresponds with a decrease in average high-temperatures, from November's frosty 45.5°F (7.5°C) to an icy 34.2°F (1.2°C). Weather in December »
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Frequently asked questions

What are the coldest months in Geneva?

January, on average, is the coldest month in Geneva, Illinois, registering a high temperature of 27.9°F (-2.3°C) and a low of 16.2°F (-8.8°C).

What are the most humid months in Geneva?

The months with the highest humidity in Geneva, Illinois, are January and February, with an average relative humidity of 83%.

How many days does it rain in Geneva?

Throughout the year, there are 101.9 rainfall days, and 8.58" (218mm) of precipitation is accumulated.

When does it snow in Geneva?

Months with snowfall in Geneva, Illinois, are January through April, October through December.

When does it snow the most in Geneva?

January is the month with the most snowfall in Geneva. Snow falls for 7.6 days and accumulates 1.14" (29mm) of snow.

How many days does it snow in Geneva?

Throughout the year, there are 28.3 snowfall days, and 3.74" (95mm) of snow is accumulated.

What is the month with the least sunshine in Geneva?

With an average of 3.7h of sunshine, January has the least sunshine of the year in Geneva, Illinois.

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

The months with the lowest UV index in Geneva, Illinois, are January and December, with an average maximum UV index of 1.

When is Daylight Saving Time (DST) in Geneva?

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 in Geneva?

The month with the most rainfall in Geneva, Illinois, is May, when the rain falls for 12.4 days and typically aggregates up to 1.26" (32mm) of precipitation.

When it does not snow in Geneva?

May through September are months without snowfall in Geneva.

When are the longest days in Geneva?

With an average of 15h and 12min of daylight, June has the longest days of the year.

What are the months with the highest UV index in Geneva?

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

What are the warmest months in Geneva?

July, characterized by an average high temperature of 81°F (27.2°C) and a low temperature of 64.2°F (17.9°C), is generally the warmest month in Geneva.

What month has the most sunshine in Geneva?

July has the most sunshine of the year in Geneva, with an average of 9.9h of sunshine.

What is the least humid month in Geneva?

October is the least humid month, with an average relative humidity of 74%.

What is the driest month in Geneva?

The months with the least rainfall in Geneva are November and December Rain falls for 5.1 days and accumulates 0.39" (10mm) of rain.

What is the month with the shortest days in Geneva?

The month with the shortest days is December, with an average of 9h and 12min of daylight.

Average temperature
Geneva, IL

Average temperature - Geneva, IL

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (27.9°F).

The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).

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Average pressure
Geneva, IL

Average pressure - Geneva, IL

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed
Geneva, IL

Average wind speed - Geneva, IL

The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).

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Average humidity
Geneva, IL

Average humidity - Geneva, IL

The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (74%).

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Average rainfall
Geneva, IL

Average rainfall - Geneva, IL

The wettest month (with the highest rainfall) is May (1.26").
The driest months (with the least rainfall) are November and December (0.39").

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Average rainfall days
Geneva, IL

Average rainfall days - Geneva, IL

The month with the highest number of rainy days is May (12.4 days).
The month with the least rainy days is January (3.4 days).

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Average snowfall
Geneva, IL

Average snowfall - Geneva, IL

The month with the highest snowfall is January (1.14").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days
Geneva, IL

Average snowfall days - Geneva, IL

The month with the highest number of snowfall days is January (7.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Geneva, IL

Average daylight / Average sunshine - Geneva, IL

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

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Average sunshine days
Geneva, IL

Average sunshine days - Geneva, IL

The month with the most sunshine days is December (22.4 days).
The month with the least sunshine days is June (13.3 days).

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Average visibility
Geneva, IL

Average visibility - Geneva, IL

The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).

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Geneva, Illinois, USA

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