September weather forecastLongmeadow, MA
September
Weather in September
September, the first month of the autumn in Longmeadow, is also an agreeable month, with an average temperature fluctuating between 54.3°F (12.4°C) and 73.2°F (22.9°C).Temperature
With the beginning of September, the average high-temperature shows a small decrease, transitioning from a warm 80.4°F (26.9°C) in August to an agreeable 73.2°F (22.9°C). An average low-temperature of 54.3°F (12.4°C) is expected during September.Humidity
In September, the average relative humidity is 77%.Rainfall
In Longmeadow, in September, it is raining for 9.6 days, with typically 1.06" (27mm) of accumulated precipitation. Throughout the year, in Longmeadow, there are 129.5 rainfall days, and 16.06" (408mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:16 am and sunset at 7:23 pm. On the last day of September, sunrise is at 6:46 am and sunset at 6:33 pm EDT.
Sunshine
In Longmeadow, the average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index in Longmeadow is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: An average UV index of 4 in September transforms into this advice:
Prioritize safety - Recommendations to avert sunburn are shared. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Longmeadow, MA
- Average high temperature in September: 73.2°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 (31.6°F).
- Average low temperature in September: 54.3°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in September
Longmeadow, 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
Longmeadow, MA
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is March (8mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Longmeadow, MA
- Average humidity in September: 77%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (71%).
Average rainfall in September
Longmeadow, MA
- Average rainfall in September: 1.06"
The wettest months (with the highest rainfall) are July and October (1.69").
The driest month (with the least rainfall) is February (0.91").
Average rainfall days in September
Longmeadow, MA
- Average rainfall days in September: 9.6 days
The month with the highest number of rainy days is July (13.6 days).
The month with the least rainy days is January (7 days).
Average snowfall in September
Longmeadow, MA
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.81").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Longmeadow, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (7.3 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Longmeadow, 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 30min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in September
Longmeadow, MA
- Average sunshine days in September: 17.7 days
The month with the most sunshine days is January (20.4 days).
The month with the least sunshine days is June (15.1 days).
Average UV index in September
Longmeadow, 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
Longmeadow, MA
- Average cloud cover in September: 38
The months with the most cloud cover are February and March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in September
Longmeadow, 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).
