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
The shift from August to September includes a minor decrease in the average high-temperature, lightly dropping from a warm 77.4°F (25.2°C) to a pleasant 70.2°F (21.2°C). In the month of September, the nighttime temperature dips to a steady average of 50.5°F (10.3°C).Humidity
In September, the average relative humidity is 80%.Rainfall
In Dalton, during September, the rain falls for 13.5 days and regularly aggregates up to 2.52" (64mm) of precipitation. In Dalton, during the entire year, the rain falls for 167.8 days and collects up to 35.43" (900mm) of precipitation.Snowfall
In Dalton, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 29min.On the first day of September in Dalton, sunrise is at 6:18 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:35 pm EDT.
Sunshine
The average sunshine in September is 8.4h.UV index
The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: The UV index of 3 during September translates into the following guidance:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Dalton have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Dalton have in September?
What is the UV index reading in September in Dalton?
Average temperature in September
Dalton, MA
- Average high temperature in September: 70.2°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (28°F).
- Average low temperature in September: 50.5°F
The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is January (15.4°F).
Average pressure in September
Dalton, 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 (29.92"Hg).
Average wind speed in September
Dalton, MA
- Average wind speed in September: 5.7mph
The windiest months (with the highest average wind speed) are January and February (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity in September
Dalton, MA
- Average humidity in September: 80%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is April (76%).
Average rainfall in September
Dalton, MA
- Average rainfall in September: 2.52"
The wettest month (with the highest rainfall) is May (3.54").
The driest month (with the least rainfall) is January (2.4").
Average rainfall days in September
Dalton, MA
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is June (18.5 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in September
Dalton, MA
- Average snowfall in September: 0"
The month with the highest snowfall is February (10.35").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Dalton, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (15.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Dalton, 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 months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days in September
Dalton, MA
- Average sunshine days in September: 14 days
The month with the most sunshine days is November (14.5 days).
The month with the least sunshine days is June (9.1 days).
Average UV index in September
Dalton, MA
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Dalton, MA
- Average cloud cover in September: 40
The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is July (Cloud cover 37).
Average visibility in September
Dalton, MA
- Average visibility in September: 5mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (5mi).
The month with the lowest visibility is February (4mi).
Dalton, Massachusetts, USA
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