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
Transition into September subtly marks a drop in the average high-temperature, moderately moving from a warm 79.7°F (26.5°C) in August to an agreeable 72.3°F (22.4°C). In the month of September, the average temperature dips to a cool 52.9°F (11.6°C) during the night.Humidity
In September, the average relative humidity is 79%.Rainfall
The month with the least rainfall is September, when the rain falls for 13.5 days and typically collects 2.17" (55mm) of precipitation.Snowfall
In Southwick, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:17 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 6:33 pm EDT.
Sunshine
In Southwick, the average sunshine in September is 8.3h.UV index
In Southwick, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: In September, a regular UV index of 4 translates into these guidelines:
Take precautions - Protection against sunburn is recommended. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Southwick have in September?
What is the UV index reading in September?
Average temperature in September
Southwick, MA
- Average high temperature in September: 72.3°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (30.9°F).
- Average low temperature in September: 52.9°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure in September
Southwick, MA
- 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
Southwick, MA
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is January (8.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity in September
Southwick, MA
- Average humidity in September: 79%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Southwick, MA
- Average rainfall in September: 2.17"
The wettest month (with the highest rainfall) is December (3.43").
The driest month (with the least rainfall) is September (2.17").
Average rainfall days in September
Southwick, MA
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in September
Southwick, MA
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.59").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Southwick, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (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
Southwick, 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 12min).
- Average sunshine in September: 8h and 2min
The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).
Average sunshine days in September
Southwick, MA
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is January (16.6 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in September
Southwick, MA
- Average UV index in September: 4
The month with the highest UV index is June (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
Southwick, MA
- Average cloud cover in September: 41
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in September
Southwick, MA
- Average visibility in September: 5mi
The months with the highest visibility are April, November and December (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September and October (5mi).
Southwick, Massachusetts, USA
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