September weather forecastChicopee, MA
September
Weather in September
September in Chicopee marks the beginning of fall with a noticeable decrease in average temperatures. From the peak warmth in August, the city experiences daytime highs averaging at 72.9°F (22.7°C). Rainfall levels drop drastically to 0.08" (2mm), making it the driest month of the year. As the days start to get shorter and temperatures cool down, it becomes a beautiful season for viewing the city's changing foliage. September's weather offers a delightful preview of the incoming fall season.Temperature
September indicates a minor shift in the average high-temperature, from August's warm 80.2°F (26.8°C) to an agreeable 72.9°F (22.7°C). During September, Chicopee records an average temperature of 53.8°F (12.1°C) at night.Humidity
In Chicopee, Massachusetts, the average relative humidity in September is 78%.Rainfall
September is the month with the least rainfall. Rain falls for 3.8 days and accumulates 0.08" (2mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In Chicopee, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:16 am and sunset at 7:23 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 6:33 pm EDT.
Sunshine
In Chicopee, the average sunshine in September is 8.7h.UV index
In Chicopee, Massachusetts, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.Note: In September, a daily maximum UV index of 4 leads to the following instructions:
Make use of precautions - It is urged to ward off sun damage. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Chicopee, MA
- Average high temperature in September: 72.9°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (31.3°F).
- Average low temperature in September: 53.8°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure in September
Chicopee, MA
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Chicopee, MA
- Average wind speed in September: 5.5mph
The windiest months (with the highest average wind speed) are January and March (8mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Chicopee, MA
- Average humidity in September: 78%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (72%).
Average rainfall in September
Chicopee, MA
- Average rainfall in September: 0.08"
The wettest month (with the highest rainfall) is November (0.59").
The driest month (with the least rainfall) is September (0.08").
Average rainfall days in September
Chicopee, MA
- Average rainfall days in September: 3.8 days
The month with the highest number of rainy days is April (6.6 days).
The month with the least rainy days is January (2.2 days).
Average snowfall in September
Chicopee, MA
- Average snowfall in September: 0"
The months with the highest snowfall are March and December (0.43").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Chicopee, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Chicopee, MA
- Average daylight in September: 12h and 30min
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 September: 8h and 42min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in September
Chicopee, MA
- Average sunshine days in September: 24.9 days
The month with the most sunshine days is January (25.6 days).
The month with the least sunshine days is July (22.4 days).
Average UV index in September
Chicopee, MA
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Chicopee, MA
- Average cloud cover in September: 37
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in September
Chicopee, MA
- Average visibility in September: 5mi
The months with the highest visibility are January, March, April, October, November and December (6mi).
The months with the lowest visibility are February, May, June, July, August and September (5mi).
