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
As September arrives, Southborough's weather displays a minor decrease in high-temperatures, transitioning from August's moderately hot 80.4°F (26.9°C) to an agreeable 72.9°F (22.7°C). In Southborough, the nighttime temperature averages to a cool 54.7°F (12.6°C) during September.Humidity
In September, the average relative humidity is 77%.Rainfall
September is the month with the least rainfall. Rain falls for 11.5 days and accumulates 1.34" (34mm) of precipitation.Snowfall
In Southborough, 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 the month, sunrise is at 6:12 am and sunset at 7:19 pm. On the last day of September, sunrise is at 6:42 am and sunset at 6:28 pm EDT.
Sunshine
In Southborough, the average sunshine in September is 8.4h.UV index
In September, the average daily maximum UV index in Southborough is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: In September, the UV index of 4 transforms into the following advice:
Undertake protective steps - Preventing sun damage is advised. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Frequently asked questions
What are the temperatures in Southborough in September?
What is the average humidity in September in Southborough?
What is the driest month in Southborough?
How much does it rain in Southborough in September?
When it does not snow in Southborough?
Does it snow in Southborough in September?
How many hours of daylight does Southborough have in September?
What time are sunrise and sunset in September in Southborough?
How long on average sun shines in September in Southborough?
What is the UV index intensity in September in Southborough?
Average temperature in September
Southborough, MA
- Average high temperature in September: 72.9°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in September: 54.7°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in September
Southborough, MA
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Southborough, MA
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is January (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in September
Southborough, MA
- Average humidity in September: 77%
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (71%).
Average rainfall in September
Southborough, MA
- Average rainfall in September: 1.34"
The wettest months (with the highest rainfall) are March, November and December (2.56").
The driest month (with the least rainfall) is September (1.34").
Average rainfall days in September
Southborough, MA
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is January (6.8 days).
Average snowfall in September
Southborough, MA
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.24").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Southborough, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (7.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Southborough, 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 2min
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 48min).
Average sunshine days in September
Southborough, MA
- Average sunshine days in September: 16 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is April (13.4 days).
Average UV index in September
Southborough, 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
Southborough, MA
- Average cloud cover in September: 38
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in September
Southborough, MA
- Average visibility in September: 5mi
The months with the highest visibility are January, March, April, May, October, November and December (6mi).
The months with the lowest visibility are February, June, July, August and September (5mi).
Southborough, Massachusetts, USA
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