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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, in Westfield, Illinois, is another cold winter month, with temperature in the range of an average low of 22.6°F (-5.2°C) and an average high of 34.7°F (1.5°C). January, known for its average high temperature of 34.7°F (1.5°C) and an average low temperature of 22.6°F (-5.2°C), is the coldest month. Weather in January »
Weather in February
February, the last month of the winter in Westfield, is another cold month, with an average temperature ranging between min 26.4°F (-3.1°C) and max 39.7°F (4.3°C). The arrival of February marks a slight shift to an average high-temperature of a still icy 39.7°F (4.3°C) from January's 34.7°F (1.5°C). Weather in February »
Weather in March
March, the first month of the spring in Westfield, is a fresh month, with temperature in the range of an average low of 36.5°F (2.5°C) and an average high of 51.4°F (10.8°C). The start of March brings a rise in the average high-temperature, moving from a wintry 39.7°F (4.3°C) in February to a cool 51.4°F (10.8°C). Weather in March »
Weather in April
April in Westfield, Illinois, is an enjoyable spring month, with temperature in the range of an average high of 62.8°F (17.1°C) and an average low of 46.4°F (8°C). Westfield's April weather shows an increase in high-temperatures, moving from March's cool 51.4°F (10.8°C) to a comfortable 62.8°F (17.1°C). Weather in April »
Weather in May
May, the last month of the spring in Westfield, is an agreeable month, with an average temperature fluctuating between 73°F (22.8°C) and 56.7°F (13.7°C). With the onset of May, the average high-temperature slightly shifts from April's refreshing 62.8°F (17.1°C) to a pleasant 73°F (22.8°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Westfield, Illinois, with temperature in the range of an average low of 64.9°F (18.3°C) and an average high of 81.1°F (27.3°C). Observing a minor shift, the average high-temperature during June adjusts from May's pleasant 73°F (22.8°C) to a moderately hot 81.1°F (27.3°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Westfield, Illinois, with an average temperature ranging between min 66.4°F (19.1°C) and max 82.9°F (28.3°C). With average temperatures fluctuating between a high of 82.9°F (28.3°C) and a low of 66.4°F (19.1°C), July stands out as the warmest month. The heat index for July is computed to be a hot 91.4°F (33°C). Weather in July »
Weather in August
August, the last month of the summer in Westfield, is another warm month, with temperature in the range of an average low of 64°F (17.8°C) and an average high of 81.7°F (27.6°C). As August takes hold, the average high-temperature is a still moderately hot 81.7°F (27.6°C), nearly mirroring that of the previous month. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Westfield, Illinois, with an average temperature varying between 59.2°F (15.1°C) and 77.4°F (25.2°C). The advent of September observes an average high-temperature of a still warm 77.4°F (25.2°C), nearly identical to August's 81.7°F (27.6°C). Weather in September »
Weather in October
October, the same as September, is another enjoyable autumn month in Westfield, Illinois, with temperature in the range of an average low of 48.4°F (9.1°C) and an average high of 64.2°F (17.9°C). The shift from September to October involves a decrease in the average high-temperature, from a warm 77.4°F (25.2°C) to a refreshing 64.2°F (17.9°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a fresh month in Westfield, Illinois, with an average temperature varying between 50.5°F (10.3°C) and 36.5°F (2.5°C). A shift in the average high-temperature occurs in November, reducing from an enjoyable 64.2°F (17.9°C) in October to a cool 50.5°F (10.3°C). Weather in November »
Weather in December
The first month of the winter, December, is also a wintry month in Westfield, Illinois, with an average temperature ranging between max 39.7°F (4.3°C) and min 28.9°F (-1.7°C). December implies a gentle temperature shift, with average high-temperatures reducing from November's cool 50.5°F (10.3°C) to an icy 39.7°F (4.3°C). Weather in December »
Updated: Aug 24, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month?
January, with average temperatures reaching a high of 34.7°F (1.5°C) and a low of 22.6°F (-5.2°C), is the coldest month.
How many days does it rain in Westfield?
In Westfield, during the entire year, the rain falls for 115.9 days and collects up to 11.26" (286mm) of precipitation.
When does it snow?
January through April, November and December are months with snowfall.
How many days does it snow?
In Westfield, Illinois, during the entire year, snow falls for 18.9 days and aggregates up to 1.73" (44mm) of snow.
What is the month with the least sunshine?
January has the least sunshine of the year, with an average of 4.1h of sunshine.
What is the driest month?
February is the month with the least rainfall in Westfield. Rain falls for 6 days and accumulates 0.47" (12mm) of precipitation.
When is Daylight Saving Time (DST)?
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?
The month with the most rainfall is April, when the rain falls for 12.6 days and typically aggregates up to 1.54" (39mm) of precipitation.
When it does not snow?
In Westfield, snow does not fall in May through October.
When are the longest days?
The month with the longest days is June, with an average of 14h and 54min of daylight.
What month has the most sunshine?
The month with the most sunshine is June, with an average of 10.4h of sunshine.
When is the highest UV index?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What month is the hottest in Westfield?
July is the warmest month, exhibiting average temperatures of 82.9°F (28.3°C) at the peak and 66.4°F (19.1°C) at the base.
What is the most humid month?
With an average relative humidity of 83%, July is the most humid month.
What is the least humid month?
With an average relative humidity of 71%, October is the least humid month.
When does it snow the most?
The month with the most snowfall is December, when snow falls for 4 days and typically aggregates up to 0.47" (12mm) of snow.
What is the month with the shortest days in Westfield?
With an average of 9h and 24min of daylight, December has the shortest days of the year.
What is the month with the lowest UV index?
December is the month with the lowest UV index, with an average maximum UV index of 1.
Average temperature
Westfield, IL
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (34.7°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 (22.6°F).
Average pressure
Westfield, IL
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Westfield, IL
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.1mph - Average wind speed in April:
10.1mph - Average wind speed in May:
8.4mph - Average wind speed in June:
7.3mph
- Average wind speed in July:
6.1mph - Average wind speed in August:
6.1mph - Average wind speed in September:
6.9mph - Average wind speed in October:
8.9mph - Average wind speed in November:
9.6mph - Average wind speed in December:
9.6mph
The windiest months (with the highest average wind speed) are January and February (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.1mph).
Average humidity
Westfield, IL
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Westfield, IL
- Average rainfall in January:
0.75" - Average rainfall in February:
0.47" - Average rainfall in March:
0.79" - Average rainfall in April:
1.54" - Average rainfall in May:
1.34" - Average rainfall in June:
1.38"
- Average rainfall in July:
1.22" - Average rainfall in August:
0.87" - Average rainfall in September:
0.55" - Average rainfall in October:
0.98" - Average rainfall in November:
0.59" - Average rainfall in December:
0.79"
The wettest month (with the highest rainfall) is April (1.54").
The driest month (with the least rainfall) is February (0.47").
Average rainfall days
Westfield, IL
- Average rainfall days in January:
6.4 days - Average rainfall days in February:
6 days - Average rainfall days in March:
10 days - Average rainfall days in April:
12.6 days - Average rainfall days in May:
14.9 days - Average rainfall days in June:
12.6 days
- Average rainfall days in July:
12.5 days - Average rainfall days in August:
10.6 days - Average rainfall days in September:
9.5 days - Average rainfall days in October:
7.7 days - Average rainfall days in November:
6.6 days - Average rainfall days in December:
6.5 days
The month with the highest number of rainy days is May (14.9 days).
The month with the least rainy days is February (6 days).
Average snowfall
Westfield, IL
The month with the highest snowfall is December (0.47").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Westfield, IL
- Average snowfall days in January:
5.8 days - Average snowfall days in February:
4.7 days - Average snowfall days in March:
2.7 days - Average snowfall days in April:
0.3 days - Average snowfall days in May:
0 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 days - Average snowfall days in November:
1.4 days - Average snowfall days in December:
4 days
The month with the highest number of snowfall days is January (5.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Westfield, IL
- Average daylight in January:
9h and 5min - 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 2min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
4h and 1min - Average sunshine in February:
4h and 2min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 1min - Average sunshine in May:
8h and 5min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
10h and 0min - Average sunshine in September:
9h and 0min - Average sunshine in October:
6h and 2min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days
Westfield, IL
- Average sunshine days in January:
20.6 days - Average sunshine days in February:
17.6 days - Average sunshine days in March:
17.3 days - Average sunshine days in April:
14.8 days - Average sunshine days in May:
12.4 days - Average sunshine days in June:
13.4 days
- Average sunshine days in July:
14.3 days - Average sunshine days in August:
16.5 days - Average sunshine days in September:
18.2 days - Average sunshine days in October:
21.2 days - Average sunshine days in November:
21 days - Average sunshine days in December:
20.8 days
The month with the most sunshine days is October (21.2 days).
The month with the least sunshine days is May (12.4 days).
Average UV index
Westfield, IL
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Westfield, IL
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility
Westfield, IL
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
Westfield, Illinois, USA
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