Climate and monthly weather forecast
LaSalle, IL

Weather in January

January, the same as December, in LaSalle, Illinois, is a freezing cold winter month, with average temperature fluctuating between 14°F (-10°C) and 30°F (-1.1°C). With an average high-temperature of 30°F (-1.1°C) and an average low-temperature of 14°F (-10°C), January is the coldest month. Weather in January »

Weather in February

February, the last month of the winter, in LaSalle, is a wintry month, with average temperature ranging between min 18°F (-7.8°C) and max 36°F (2.2°C). In LaSalle, Illinois, the average high-temperature in February slightly increases, from a freezing cold 30°F (-1.1°C) in January, to a wintry 36°F (2.2°C). Weather in February »

Weather in March

March, the first month of the spring, in LaSalle, is a chilly month, with average temperature varying between 28°F (-2.2°C) and 48°F (8.9°C). In LaSalle, the average high-temperature increases, from a wintry 36°F (2.2°C) in February, to a frosty 48°F (8.9°C). Weather in March »

Weather in April

April is an enjoyable spring month in LaSalle, Illinois, with average temperature ranging between min 39°F (3.9°C) and max 62.1°F (16.7°C). In LaSalle, the average high-temperature in April increases, from a chilly 48°F (8.9°C) in March, to an enjoyable 62.1°F (16.7°C). Weather in April »

Weather in May

The last month of the spring, May, is a pleasant month in LaSalle, Illinois, with average temperature fluctuating between 48.9°F (9.4°C) and 73°F (22.8°C). In May, the average high-temperature increases, from a comfortable 62.1°F (16.7°C) in April, to a pleasant 73°F (22.8°C). Weather in May »

Weather in June

June, the first month of the summer, in LaSalle, is a moderately hot month, with average temperature fluctuating between 82°F (27.8°C) and 59°F (15°C). In LaSalle, the average high-temperature in June increases, from an agreeable 73°F (22.8°C) in May, to a warm 82°F (27.8°C). Weather in June »

Weather in July

July, like June, in LaSalle, Illinois, is a moderately hot summer month, with average temperature fluctuating between 84.9°F (29.4°C) and 63°F (17.2°C). July is the warmest month, with an average high-temperature of 84.9°F (29.4°C) and an average low-temperature of 63°F (17.2°C). Weather in July »

Weather in August

August, the last month of the summer, in LaSalle, is another warm month, with average temperature fluctuating between 82.9°F (28.3°C) and 61°F (16.1°C). In August, the average high-temperature is almost the same as in July - a still warm 82.9°F (28.3°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in LaSalle, Illinois, with average temperature varying between 77°F (25°C) and 52°F (11.1°C). In LaSalle, the average high-temperature in September slightly decreases, from 82.9°F (28.3°C) in August, to a still moderately hot 77°F (25°C). Weather in September »

Weather in October

October, like September, in LaSalle, Illinois, is another enjoyable autumn month, with average temperature ranging between max 64°F (17.8°C) and min 41°F (5°C). In LaSalle, the average high-temperature decreases, from a warm 77°F (25°C) in September, to a comfortable 64°F (17.8°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a frosty month in LaSalle, Illinois, with average temperature varying between 30.9°F (-0.6°C) and 48.9°F (9.4°C). In LaSalle, the average high-temperature significantly decreases, from a comfortable 64°F (17.8°C) in October, to a chilly 48.9°F (9.4°C). Weather in November »

Weather in December

The first month of the winter, December, is also a wintry month in LaSalle, Illinois, with average temperature ranging between max 34°F (1.1°C) and min 18°F (-7.8°C). In December, the average high-temperature declines considerably, from a frosty 48.9°F (9.4°C) in November, to a cold 34°F (1.1°C). Weather in December »
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FAQ

What is the coldest month in LaSalle?

With an average high-temperature of 30°F (-1.1°C) and an average low-temperature of 14°F (-10°C), January is the coldest month in LaSalle, Illinois.

When are the longest days in LaSalle?

June has the longest days of the year in LaSalle, with an average of 15.1h of daylight.

What is the warmest month in LaSalle?

July is the warmest month in LaSalle, with an average high-temperature of 84.9°F (29.4°C) and an average low-temperature of 63°F (17.2°C).

What is the month with the shortest days in LaSalle?

December has the shortest days of the year in LaSalle, Illinois, with an average of 9.2h of daylight.

Average daylight
LaSalle, IL

Average daylight - LaSalle, IL

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.2h).

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