Climate and monthly weather forecast
Galena, IL

Bright brown and golden trees near a calm river, bridge, and the colorful town of Galena, Illinois,
Bright brown and golden trees near a calm river, bridge, and the colorful town of Galena, Illinois,

Weather in January

January, like December, is another subzero cold winter month in Galena, Illinois, with temperature in the range of an average low of 12.4°F (-10.9°C) and an average high of 25°F (-3.9°C). With an average high-temperature of 25°F (-3.9°C) and an average low-temperature of 12.4°F (-10.9°C), January is the coldest month. Weather in January »

Weather in February

The last month of the winter, February, is also a subzero cold month in Galena, Illinois, with an average temperature varying between 28.9°F (-1.7°C) and 15.8°F (-9°C). In February, the average high-temperature is relatively the same as in January - a still freezing cold 28.9°F (-1.7°C). Weather in February »

Weather in March

The first month of the spring, March, is a frosty month in Galena, Illinois, with an average temperature fluctuating between 43.7°F (6.5°C) and 28.8°F (-1.8°C). In Galena, the average high-temperature in March significantly increases from a freezing cold 28.9°F (-1.7°C) in February to a frosty 43.7°F (6.5°C). Weather in March »

Weather in April

April is a moderate spring month in Galena, Illinois, with an average temperature varying between 56.1°F (13.4°C) and 39°F (3.9°C). In Galena, the average high-temperature in April rises from a frosty 43.7°F (6.5°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 Galena, is a comfortable month, with an average temperature varying between 67.6°F (19.8°C) and 50.2°F (10.1°C). In May, the average high-temperature increases from a moderate 56.1°F (13.4°C) in April to an enjoyable 67.6°F (19.8°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in Galena, Illinois, with an average temperature fluctuating between 76.6°F (24.8°C) and 59.4°F (15.2°C). In Galena, the average high-temperature in June rises from an enjoyable 67.6°F (19.8°C) in May to a moderately hot 76.6°F (24.8°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in Galena, Illinois, with an average temperature fluctuating between 79.7°F (26.5°C) and 63°F (17.2°C). July is the warmest month, with an average high-temperature of 79.7°F (26.5°C) and an average low-temperature of 63°F (17.2°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Galena, Illinois, with temperature in the range of an average low of 60.4°F (15.8°C) and an average high of 78.6°F (25.9°C). In Galena, the average high-temperature in August is essentially the same as in July - a still moderately hot 78.6°F (25.9°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a pleasant month in Galena, Illinois, with an average temperature varying between 53.1°F (11.7°C) and 73°F (22.8°C). In Galena, the average high-temperature in September slightly decreases from a moderately hot 78.6°F (25.9°C) in August to an agreeable 73°F (22.8°C). Weather in September »

Weather in October

October, the same as September, in Galena, Illinois, is another mild autumn month, with temperature in the range of an average low of 42.4°F (5.8°C) and an average high of 58.3°F (14.6°C). In Galena, the average high-temperature in October significantly decreases from a pleasant 73°F (22.8°C) in September to a moderate 58.3°F (14.6°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a frosty month in Galena, Illinois, with an average temperature varying between 44.2°F (6.8°C) and 30.6°F (-0.8°C). In Galena, the average high-temperature in November decreases from a moderate 58.3°F (14.6°C) in October to a chilly 44.2°F (6.8°C). Weather in November »

Weather in December

The first month of the winter, December, is also a subzero cold month in Galena, Illinois, with an average temperature varying between 31.8°F (-0.1°C) and 21.4°F (-5.9°C). In Galena, the average high-temperature in December decreases from a frosty 44.2°F (6.8°C) in November to a subzero cold 31.8°F (-0.1°C). Weather in December »
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FAQ

What is the coldest month in Galena?

January is the coldest month in Galena, with an average high-temperature of 25°F (-3.9°C) and an average low-temperature of 12.4°F (-10.9°C).

What is the most humid month in Galena?

The most humid month in Galena, Illinois, is January, with an average relative humidity of 87%.

What is the driest month in Galena?

The month with the least rainfall in Galena is January, when the rain falls for 5.4 days and typically collects 1.26" (32mm) of precipitation.

How many days does it rain in Galena?

Throughout the year, there are 153.1 rainfall days, and 30.75" (781mm) of precipitation is accumulated.

When does it snow in Galena?

January through April, October through December are months with snowfall in Galena.

What is the snowiest month in Galena?

The month with the most snowfall is January, when snow falls for 13.2 days and typically aggregates up to 5.12" (130mm) of snow.

How many days does it snow in Galena?

In Galena, Illinois, during the entire year, snow falls for 46.9 days and aggregates up to 17.52" (445mm) of snow.

What is the month with the least sunshine in Galena?

January has the least sunshine of the year in Galena, with an average of 3.7h of sunshine.

When is the lowest UV index in Galena?

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

When is Daylight Saving Time (DST) in Galena?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in Galena, Illinois, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from CDT to CST.

What is the least humid month in Galena?

April and October, with an average relative humidity of 76%, are the least humid months.

When it does not snow in Galena?

In Galena, Illinois, snow does not fall in May through September.

What is the wettest month in Galena?

The month with the most rainfall in Galena, Illinois, is June, when the rain falls for 19.5 days and typically aggregates up to 4.29" (109mm) of precipitation.

When are the longest days in Galena?

June has the longest days of the year in Galena, Illinois, with an average of 15h and 14min of daylight.

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

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

What is the warmest month in Galena?

With an average high-temperature of 79.7°F (26.5°C) and an average low-temperature of 63°F (17.2°C), July is the warmest month.

What month has the most sunshine in Galena?

August has the most sunshine of the year in Galena, with an average of 9.8h of sunshine.

What is the month with the shortest days in Galena?

December has the shortest days of the year in Galena, Illinois, with an average of 9h and 8min of daylight.

Average pressure
Galena, IL

Average pressure - Galena, IL

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

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Average wind speed
Galena, IL

Average wind speed - Galena, IL

The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

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Average humidity
Galena, IL

Average humidity - Galena, IL

The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and October (76%).

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Average rainfall
Galena, IL

Average rainfall - Galena, IL

The wettest month (with the highest rainfall) is June (4.29").
The driest month (with the least rainfall) is January (1.26").

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Average rainfall days
Galena, IL

Average rainfall days - Galena, IL

The month with the highest number of rainy days is May (20 days).
The month with the least rainy days is February (4.8 days).

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Average snowfall
Galena, IL

Average snowfall - Galena, IL

The month with the highest snowfall is January (5.12").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days
Galena, IL

Average snowfall days - Galena, IL

The month with the highest number of snowfall days is January (13.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight / Average sunshine
Galena, IL

Average daylight / Average sunshine - Galena, IL

The month with the longest days is June (Average daylight: 15h and 14min).
The month with the shortest days is December (Average daylight: 9h and 8min).

The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

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Average sunshine days
Galena, IL

Average sunshine days - Galena, IL

The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is June (7.9 days).

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Average visibility
Galena, IL

Average visibility - Galena, IL

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

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