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 small decrease in the average high-temperature, from a warm 77.2°F (25.1°C) to a pleasant 69.8°F (21°C). During the nights in September, the temperature in Acton averages to a cool 50.2°F (10.1°C).Humidity
In Acton, the average relative humidity in September is 80%.Rainfall
The month with the least rainfall is September, when the rain falls for 10.9 days and typically collects 1.54" (39mm) of precipitation.Snowfall
In Acton, snow does not fall in June through September.Daylight
In Acton, the average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:08 am and sunset at 7:18 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 8.2h.UV index
In Acton, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: In September, an average UV index of 3 transforms into the following instructions:
Put precautions into practice - Guidance to elude sunburn is provided. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September in Acton?
When it does not snow?
Does it snow in September?
What is the average length of the day in September in Acton?
When are sunrise and sunset in September?
How many hours of sunshine does Acton have in September?
How high is the UV index in September?
Average temperature in September
Acton, ME
- Average high temperature in September: 69.8°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (27.7°F).
- Average low temperature in September: 50.2°F
The month with the highest average low temperature is July (57.9°F).
The coldest month (with the lowest average low temperature) is January (13.8°F).
Average pressure in September
Acton, ME
- 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 (29.91"Hg).
Average wind speed in September
Acton, ME
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is January (7.6mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).
Average humidity in September
Acton, ME
- Average humidity in September: 80%
The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are April and November (77%).
Average rainfall in September
Acton, ME
- Average rainfall in September: 1.54"
The wettest month (with the highest rainfall) is October (3.31").
The driest month (with the least rainfall) is September (1.54").
Average rainfall days in September
Acton, ME
- Average rainfall days in September: 10.9 days
The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is February (5.5 days).
Average snowfall in September
Acton, ME
- Average snowfall in September: 0"
The month with the highest snowfall is February (9.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Acton, ME
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (11.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Acton, ME
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in September
Acton, ME
- Average sunshine days in September: 17.2 days
The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is April (13.2 days).
Average UV index in September
Acton, ME
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 5).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in September
Acton, ME
- Average cloud cover in September: 38
The month with the most cloud cover is March (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in September
Acton, ME
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Acton, Maine, USA
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