September weather forecastNorthfield, CT
September
Weather in September
September, the first month of the autumn in Northfield, is still a pleasant month, with an average temperature ranging between max 72.3°F (22.4°C) and min 54.1°F (12.3°C).Temperature
With the arrival of September, Northfield notices a mild change in the average high-temperature, sliding from August's moderately hot 79.7°F (26.5°C) to a pleasant 72.3°F (22.4°C). An average nighttime temperature of 54.1°F (12.3°C) is observed during September.Humidity
In September, the average relative humidity in Northfield is 79%.Rainfall
September is the month with the least rainfall. Rain falls for 13.5 days and accumulates 2.24" (57mm) of precipitation.Snowfall
In Northfield, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 28min.On the first day of September, sunrise is at 6:19 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 6:35 pm EDT.
Sunshine
In September, the average sunshine in Northfield, Connecticut, is 8.5h.UV index
In Northfield, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 4 during September leads to these advisories:
Exercise prevention - Protecting skin and eyes from harm is required. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Northfield, CT
- Average high temperature in September: 72.3°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 (31.5°F).
- Average low temperature in September: 54.1°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in September
Northfield, CT
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Northfield, CT
- Average wind speed in September: 5.6mph
The windiest months (with the highest average wind speed) are January and March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Northfield, CT
- Average humidity in September: 79%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Northfield, CT
- Average rainfall in September: 2.24"
The wettest month (with the highest rainfall) is December (3.62").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days in September
Northfield, CT
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is June (17.7 days).
The months with the least rainy days are January and February (8.1 days).
Average snowfall in September
Northfield, CT
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.1").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Northfield, CT
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Northfield, CT
- 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 July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in September
Northfield, CT
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is November (16.6 days).
The month with the least sunshine days is June (10.5 days).
Average UV index in September
Northfield, CT
- 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, November and December (UV index 2).
Average cloud cover in September
Northfield, CT
- Average cloud cover in September: 39
The months with the most cloud cover are February and March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in September
Northfield, CT
- Average visibility in September: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
