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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, is a freezing cold winter month in Westmont, Illinois, with an average temperature varying between 17.1°F (-8.3°C) and 28.8°F (-1.8°C). With its high average temperature of 28.8°F (-1.8°C) and a low of 17.1°F (-8.3°C), January is regarded as the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is a cold month in Westmont, Illinois, with an average temperature fluctuating between 19.9°F (-6.7°C) and 32.5°F (0.3°C). With the advent of February, Westmont experiences an average high-temperature of a wintry 32.5°F (0.3°C), mirroring a close resemblance to the previous month. Weather in February »
Weather in March
March, the first month of the spring in Westmont, is a frosty month, with an average temperature varying between 31.5°F (-0.3°C) and 45.1°F (7.3°C). In Westmont, the average high-temperature in March increases from a wintry 32.5°F (0.3°C) in February to a frosty 45.1°F (7.3°C). Weather in March »
Weather in April
April in Westmont, Illinois, is a moderate spring month, with an average temperature varying between 40.6°F (4.8°C) and 56.5°F (13.6°C). As Westmont transitions into April, the average high-temperature shows a change, moving from a chilly 45.1°F (7.3°C) in March to a refreshing 56.5°F (13.6°C). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in Westmont, Illinois, with an average temperature varying between 68.9°F (20.5°C) and 52.2°F (11.2°C). May's arrival brings a temperature shift, moving from a moderate 56.5°F (13.6°C) in April to an agreeable 68.9°F (20.5°C). Weather in May »
Weather in June
June, the first month of the summer in Westmont, is a warm month, with temperature in the range of an average low of 61.7°F (16.5°C) and an average high of 78.3°F (25.7°C). June witnesses an increase in the average high-temperature, moving from a pleasant 68.9°F (20.5°C) in May to a warm 78.3°F (25.7°C). Weather in June »
Weather in July
July, like June, in Westmont, Illinois, is another warm summer month, with an average temperature fluctuating between 82.4°F (28°C) and 66.4°F (19.1°C). The warmest period tends to be July, when average temperatures fluctuate between a high of 82.4°F (28°C) and a low of 66.4°F (19.1°C). During July, the heat index is appraised at a hot 89.6°F (32°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Westmont, Illinois, with an average temperature ranging between min 64.8°F (18.2°C) and max 81.1°F (27.3°C). August brings a marginal elevation to a still moderately hot 81.1°F (27.3°C) from July's 82.4°F (28°C) in Westmont's average high-temperatures. Weather in August »
Weather in September
September, the first month of the autumn in Westmont, is also a moderately hot month, with an average temperature varying between 57.9°F (14.4°C) and 74.3°F (23.5°C). The move into September indicates a slight reduction in the average high-temperature, down from August's warm 81.1°F (27.3°C) to a still moderately hot 74.3°F (23.5°C). Weather in September »
Weather in October
October, like September, is another refreshing autumn month in Westmont, Illinois, with an average temperature ranging between min 45.7°F (7.6°C) and max 60.6°F (15.9°C). As October begins, there is a decrease in the average high-temperature, falling from a warm 74.3°F (23.5°C) in September to a moderate 60.6°F (15.9°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Westmont, Illinois, with an average temperature fluctuating between 33.6°F (0.9°C) and 45.7°F (7.6°C). With the onset of November, Westmont experiences a noticeable temperature shift, with the average high-temperature receding from a moderate 60.6°F (15.9°C) in October to a chilly 45.7°F (7.6°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in Westmont, Illinois, with temperature in the range of an average low of 25°F (-3.9°C) and an average high of 34.5°F (1.4°C). The transition into December is accompanied by a temperature decrease, with the average high-temperature shifting from a frosty 45.7°F (7.6°C) in November to a wintry 34.5°F (1.4°C). Weather in December »
[Resources]Frequently asked questions
What is the coldest time of year in Westmont?
January is the coldest month of the year in Westmont, Illinois, registering average temperatures as high as 28.8°F (-1.8°C) and as low as 17.1°F (-8.3°C).
What are the most humid months in Westmont?
January and February, with an average relative humidity of 82%, are most humid months.
How much does it rain in Westmont?
In Westmont, during the entire year, the rain falls for 118.5 days and collects up to 13.74" (349mm) of precipitation.
When does it snow in Westmont?
Months with snowfall in Westmont are January through April, October through December.
How many days does it snow in Westmont?
Throughout the year, in Westmont, Illinois, there are 34.9 snowfall days, and 7.2" (183mm) of snow is accumulated.
What is the month with the least sunshine in Westmont?
With an average of 3.7h of sunshine, January has the least sunshine of the year in Westmont.
When is the lowest UV index in Westmont?
January is the month with the lowest UV index in Westmont, Illinois, with an average maximum UV index of 1.
When does it snow the most in Westmont?
The month with the most snowfall in Westmont, Illinois, is February, when snow falls for 8.6 days and typically aggregates up to 2.28" (58mm) of snow.
When is Daylight Saving Time (DST) in Westmont?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Westmont, 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 Westmont?
May is the month with the most rainfall. Rain falls for 14.9 days and accumulates 1.97" (50mm) of precipitation.
When it does not snow in Westmont?
May through September are months without snowfall in Westmont, Illinois.
When are the longest days in Westmont?
With an average of 15h and 12min of daylight, June has the longest days of the year.
When is the highest UV index in Westmont?
June through August, with an average maximum UV index of 6, are months with the highest UV index in Westmont, Illinois.
What are the warmest months in Westmont?
In Westmont, July is identified by the average highest temperatures, reaching a peak of 82.4°F (28°C) and a low of 66.4°F (19.1°C).
What month has the most sunshine in Westmont?
August has the most sunshine of the year, with an average of 10h of sunshine.
What is the least humid month in Westmont?
The least humid month in Westmont is October, with an average relative humidity of 72%.
What is the driest month in Westmont?
The month with the least rainfall is December, when the rain falls for 4.9 days and typically collects 0.63" (16mm) of precipitation.
What is the month with the shortest days in Westmont?
December has the shortest days of the year in Westmont, with an average of 9h and 12min of daylight.
Average temperature
Westmont, IL
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (28.8°F).
The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure
Westmont, IL
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.1"Hg - Average pressure in December:
30.09"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Westmont, IL
- Average wind speed in January:
9.7mph - Average wind speed in February:
9.6mph - Average wind speed in March:
9.2mph - Average wind speed in April:
9.4mph - Average wind speed in May:
8mph - Average wind speed in June:
7.1mph
- Average wind speed in July:
6.3mph - Average wind speed in August:
6.1mph - Average wind speed in September:
7mph - Average wind speed in October:
8.6mph - Average wind speed in November:
9.3mph - Average wind speed in December:
9mph
The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity
Westmont, IL
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Westmont, IL
- Average rainfall in January:
0.67" - Average rainfall in February:
0.71" - Average rainfall in March:
0.75" - Average rainfall in April:
1.38" - Average rainfall in May:
1.97" - Average rainfall in June:
1.61"
- Average rainfall in July:
1.61" - Average rainfall in August:
1.34" - Average rainfall in September:
1.18" - Average rainfall in October:
1.22" - Average rainfall in November:
0.67" - Average rainfall in December:
0.63"
The wettest month (with the highest rainfall) is May (1.97").
The driest month (with the least rainfall) is December (0.63").
Average rainfall days
Westmont, IL
- Average rainfall days in January:
4.3 days - Average rainfall days in February:
4.2 days - Average rainfall days in March:
9.1 days - Average rainfall days in April:
12.8 days - Average rainfall days in May:
14.9 days - Average rainfall days in June:
14.3 days
- Average rainfall days in July:
14.6 days - Average rainfall days in August:
12.2 days - Average rainfall days in September:
11.5 days - Average rainfall days in October:
9.8 days - Average rainfall days in November:
5.9 days - Average rainfall days in December:
4.9 days
The month with the highest number of rainy days is May (14.9 days).
The month with the least rainy days is February (4.2 days).
Average snowfall
Westmont, IL
The month with the highest snowfall is February (2.28").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Westmont, IL
- Average snowfall days in January:
9.7 days - Average snowfall days in February:
8.6 days - Average snowfall days in March:
4.9 days - Average snowfall days in April:
1.4 days - Average snowfall days in May:
0.1 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.4 days - Average snowfall days in November:
2.6 days - Average snowfall days in December:
7.2 days
The month with the highest number of snowfall days is January (9.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Westmont, IL
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
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).
- Average sunshine in January:
3h and 4min - Average sunshine in February:
3h and 5min - Average sunshine in March:
6h and 0min - Average sunshine in April:
7h and 4min - Average sunshine in May:
8h and 3min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
9h and 5min - Average sunshine in August:
10h and 0min - Average sunshine in September:
8h and 4min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days
Westmont, IL
- Average sunshine days in January:
19.7 days - Average sunshine days in February:
17.3 days - Average sunshine days in March:
17.4 days - Average sunshine days in April:
13.8 days - Average sunshine days in May:
13.7 days - Average sunshine days in June:
12.3 days
- Average sunshine days in July:
11.8 days - Average sunshine days in August:
14.8 days - Average sunshine days in September:
16.1 days - Average sunshine days in October:
19.6 days - Average sunshine days in November:
20.4 days - Average sunshine days in December:
20.7 days
The month with the most sunshine days is December (20.7 days).
The month with the least sunshine days is July (11.8 days).
Average UV index
Westmont, IL
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
Westmont, IL
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility
Westmont, IL
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Westmont, Illinois, USA
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