Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September's onset records a minor alteration in the average high-temperature to a still warm 77.4°F (25.2°C) from August's 81.7°F (27.6°C). In Westfield, September is marked by an average low-temperature of 59.2°F (15.1°C).Humidity
In September, the average relative humidity in Westfield is 76%.Rainfall
In Westfield, in September, during 9.5 rainfall days, 0.55" (14mm) of precipitation is typically accumulated. In Westfield, during the entire year, the rain falls for 115.9 days and collects up to 11.26" (286mm) of precipitation.Snowfall
In Westfield, snow does not fall in May through October.Daylight
In September, the average length of the day in Westfield, Illinois, is 12h and 26min.On the first day of September in Westfield, Illinois, sunrise is at 6:21 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 6:35 pm CDT.
Sunshine
In Westfield, the average sunshine in September is 9h.UV index
In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: During September, 5 as the daily maximum UV index converts into the following advice:
Prioritize safety - Recommendations to avert sunburn are shared. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Frequently asked questions
What is the temperature in September in Westfield?
What is the average humidity in September in Westfield?
How many days does it rain in September in Westfield?
When it does not snow in Westfield?
How many hours of daylight does Westfield have in September?
When are sunrise and sunset in September in Westfield?
How many hours of sunshine does Westfield have in September?
What is the UV index intensity in September in Westfield?
Average temperature in September
Westfield, IL
- Average high temperature in September: 77.4°F
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).
- Average low temperature in September: 59.2°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 in September
Westfield, IL
- Average pressure in September: 30.03"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 in September
Westfield, IL
- Average wind speed in September: 6.9mph
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 in September
Westfield, IL
- Average humidity in September: 76%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Westfield, IL
- Average rainfall in September: 0.55"
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 in September
Westfield, IL
- Average rainfall days in September: 9.5 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 in September
Westfield, IL
- Average snowfall in September: 0"
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 in September
Westfield, IL
- Average snowfall days in September: 0 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 in September /
Average sunshine in September
Westfield, IL
- Average daylight in September: 12h 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 September: 9h and 0min
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 in September
Westfield, IL
- Average sunshine days in September: 18.2 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 in September
Westfield, IL
- Average UV index in September: 5
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 in September
Westfield, IL
- Average cloud cover in September: 31
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 in September
Westfield, IL
- Average visibility in September: 6mi
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
Weather forecast for your location
2. Allow the app to use your location
