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
The start of September involves a subtle temperature drop, shifting from a moderately hot 75°F (23.9°C) in August to a refreshing 67.3°F (19.6°C). During September, the average low-temperature is a frosty 47.3°F (8.5°C).Humidity
In September, the average relative humidity is 79%.Rainfall
In Willimantic, in September, during 10.4 rainfall days, 1.77" (45mm) of precipitation is typically accumulated. Throughout the year, there are 152.4 rainfall days, and 20.83" (529mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Willimantic.Daylight
In September, the average length of the day in Willimantic, Maine, is 12h and 31min.On the first day of September in Willimantic, sunrise is at 6:00 am and sunset at 7:14 pm. On the last day of the month, sunrise is at 6:35 am and sunset at 6:19 pm EDT.
Sunshine
The average sunshine in September is 8h.UV index
In Willimantic, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: An average UV index of 4 in September transforms into this advice:
Guard yourself - Avoiding sunburn is suggested. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Frequently asked questions
What are September temperatures in Willimantic?
What is the average humidity in September in Willimantic?
How many days does it rain in September in Willimantic?
When it does not snow in Willimantic?
Does it snow in Willimantic in September?
What is the average length of the day in September in Willimantic?
When are sunrise and sunset in September in Willimantic?
How many hours of sunshine does Willimantic have in September?
What is the UV index intensity in September in Willimantic?
Average temperature in September
Willimantic, ME
- Average high temperature in September: 67.3°F
The warmest month (with the highest average high temperature) is July (76.6°F).
The month with the lowest average high temperature is January (23.4°F).
- Average low temperature in September: 47.3°F
The month with the highest average low temperature is July (55.6°F).
The coldest month (with the lowest average low temperature) is January (9.9°F).
Average pressure in September
Willimantic, ME
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is September (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Willimantic, ME
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is March (7.5mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in September
Willimantic, ME
- Average humidity in September: 79%
The month with the highest relative humidity is February (89%).
The month with the lowest relative humidity is May (76%).
Average rainfall in September
Willimantic, ME
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is April (2.24").
The driest months (with the least rainfall) are February and March (1.22").
Average rainfall days in September
Willimantic, ME
- Average rainfall days in September: 10.4 days
The month with the highest number of rainy days is June (16.7 days).
The month with the least rainy days is February (7.7 days).
Average snowfall in September
Willimantic, ME
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.71").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Willimantic, ME
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (16.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Willimantic, ME
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 8h and 0min
The month with the most sunshine is August (Average sunshine: 9h and 42min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days in September
Willimantic, ME
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is September (16.3 days).
The month with the least sunshine days is April (10.4 days).
Average UV index in September
Willimantic, ME
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Willimantic, ME
- Average cloud cover in September: 41
The month with the most cloud cover is February (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 41).
Average visibility in September
Willimantic, ME
- Average visibility in September: 5mi
The months with the highest visibility are April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February and March (4mi).
Willimantic, Maine, USA
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