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
Northampton in September undergoes a slight reduction in the average high-temperature, shifting from August's moderately hot 79.3°F (26.3°C) to an agreeable 72°F (22.2°C). Northampton's nighttime temperature during September is consistently averaged at a fresh 52.7°F (11.5°C).Humidity
In Northampton, Massachusetts, the average relative humidity in September is 78%.Rainfall
In September, the rain falls for 10.3 days. Throughout September, 0.98" (25mm) of precipitation is accumulated. Throughout the year, there are 134.1 rainfall days, and 14.84" (377mm) of precipitation is accumulated.Snowfall
In Northampton, snow does not fall in June through October.Daylight
In September, the average length of the day in Northampton is 12h and 28min.On the first day of the month, sunrise is at 6:16 am and sunset at 7:24 pm. On the last day of September, in Northampton, Massachusetts, sunrise is at 6:47 am and sunset at 6:33 pm EDT.
Sunshine
The average sunshine in September in Northampton is 8.7h.UV index
In September, the average daily maximum UV index in Northampton is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: A maximum daily UV index of 4 during September morphs into the following directions:
Guard yourself - An obligation to protect skin and eyes from harm exists. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Frequently asked questions
What is the temperature in September in Northampton?
What is the average humidity in September in Northampton?
How much does it rain in Northampton in September?
When it does not snow in Northampton?
How many hours of daylight does Northampton have in September?
What time are sunrise and sunset in September in Northampton?
How long on average sun shines in September in Northampton?
What is the UV index reading in September in Northampton?
Average temperature in September
Northampton, MA
- Average high temperature in September: 72°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (30.4°F).
- Average low temperature in September: 52.7°F
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in September
Northampton, 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 (29.92"Hg).
Average wind speed in September
Northampton, MA
- Average wind speed in September: 5.5mph
The windiest months (with the highest average wind speed) are January, February and March (8mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Northampton, MA
- Average humidity in September: 78%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (72%).
Average rainfall in September
Northampton, MA
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is October (1.61").
The driest month (with the least rainfall) is February (0.91").
Average rainfall days in September
Northampton, MA
- Average rainfall days in September: 10.3 days
The month with the highest number of rainy days is May (13.9 days).
The month with the least rainy days is January (8.5 days).
Average snowfall in September
Northampton, MA
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.85").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Northampton, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (7.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Northampton, MA
- Average daylight in September: 12h and 3min
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 6min).
- Average sunshine in September: 8h and 4min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in September
Northampton, MA
- Average sunshine days in September: 17.1 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is June (13.7 days).
Average UV index in September
Northampton, MA
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Northampton, MA
- Average cloud cover in September: 37
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
Northampton, MA
- Average visibility in September: 5mi
The months with the highest visibility are January, March, April, November and December (6mi).
The months with the lowest visibility are February, May, June, July, August, September and October (5mi).
Northampton, Massachusetts, USA
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