LaSalle
Illinois, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
LaSalle, IL

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Contents

Weather in January

January, like December, is another subzero cold winter month in LaSalle, Illinois, with average temperature fluctuating between -1.1°C (30°F) and -10°C (14°F). The coldest month is January, with an average high-temperature of -1.1°C (30°F) and an average low-temperature of -10°C (14°F). Weather in January »

Weather in February

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

Weather in March

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

Weather in April

April is a comfortable spring month in LaSalle, Illinois, with temperature in the range of an average low of 3.9°C (39°F) and an average high of 16.7°C (62.1°F). In April, the average high-temperature rises, from a frosty 8.9°C (48°F) in March, to a comfortable 16.7°C (62.1°F). Weather in April »

Weather in May

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

Weather in June

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

Weather in July

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

Weather in August

August, the last month of the summer, in LaSalle, is also a moderately hot month, with average temperature varying between 16.1°C (61°F) and 28.3°C (82.9°F). In LaSalle, Illinois, the average high-temperature in August is essentially the same as in July - a still moderately hot 28.3°C (82.9°F). Weather in August »

Weather in September

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

Weather in October

October, the same as September, is another comfortable autumn month in LaSalle, Illinois, with average temperature fluctuating between 17.8°C (64°F) and 5°C (41°F). In LaSalle, Illinois, the average high-temperature drops, from a warm 25°C (77°F) in September, to a comfortable 17.8°C (64°F). 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 9.4°C (48.9°F) and -0.6°C (30.9°F). In LaSalle, Illinois, the average high-temperature in November declines considerably, from a comfortable 17.8°C (64°F) in October, to a frosty 9.4°C (48.9°F). Weather in November »

Weather in December

The first month of the winter, December, is also a wintry month in LaSalle, Illinois, with temperature in the range of an average low of -7.8°C (18°F) and an average high of 1.1°C (34°F). In December, the average high-temperature plummets, from a chilly 9.4°C (48.9°F) in November, to a wintry 1.1°C (34°F). Weather in December »

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.

When are the longest days in LaSalle?

With an average of 15.1h of daylight, June has the longest days of the year.

What 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), July is the warmest month in LaSalle, Illinois.

What is the month with the shortest days in LaSalle?

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

Average temperature
LaSalle, IL

Average temperature - LaSalle, IL

The warmest month (with the highest average high temperature) is July (85°F).
The month with the lowest average high temperature is January (30°F).

The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (14°F).

Average daylight
LaSalle, IL

Average daylight - LaSalle, IL

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