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 transition into September involves a small decrease in the average high-temperature, dipping slightly from a warm 78.4°F (25.8°C) in August to a pleasant 71.4°F (21.9°C). The average low-temperature, in September, is a moderate 58.1°F (14.5°C).Humidity
The months with the highest humidity are February, June and September, with an average relative humidity of 77%.Rainfall
September is the month with the least rainfall. Rain falls for 11.7 days and accumulates 1.5" (38mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 28min.On the first day of the month, sunrise is at 6:09 am and sunset at 7:17 pm. On the last day of September, sunrise is at 6:40 am and sunset at 6:26 pm EDT.
Sunshine
The average sunshine in September is 8.5h.UV index
In Weymouth, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 4 during September translates into the following guidance:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Weymouth in September?
What is the most humid month?
What is the average humidity in September?
What is the driest month in Weymouth?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Weymouth have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Weymouth have in September?
What is the UV index intensity in September?
Average temperature in September
Weymouth, MA
- Average high temperature in September: 71.4°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 (34.5°F).
- Average low temperature in September: 58.1°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in September
Weymouth, MA
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Weymouth, MA
- Average wind speed in September: 7.7mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).
Average humidity in September
Weymouth, MA
- Average humidity in September: 77%
The months with the highest relative humidity are February, June and September (77%).
The month with the lowest relative humidity is April (72%).
Average rainfall in September
Weymouth, MA
- Average rainfall in September: 1.5"
The wettest month (with the highest rainfall) is December (3.11").
The driest month (with the least rainfall) is September (1.5").
Average rainfall days in September
Weymouth, MA
- Average rainfall days in September: 11.7 days
The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is January (8.6 days).
Average snowfall in September
Weymouth, MA
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.86").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Weymouth, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Weymouth, 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 3min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).
Average sunshine days in September
Weymouth, MA
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is November (17 days).
The month with the least sunshine days is July (12.8 days).
Average UV index in September
Weymouth, MA
- Average UV index in September: 4
The months with the highest UV index are 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
Weymouth, MA
- Average cloud cover in September: 34
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Weymouth, MA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Weymouth, Massachusetts, USA
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