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 beginning of September brings a slight decrease in the average high-temperature, transitioning from a warm 73.4°F (23°C) in August to an enjoyable 67.1°F (19.5°C). Brunswick usually reports an average low-temperature of 54.3°F (12.4°C) during the month of September.Humidity
The average relative humidity in September is 79%.Rainfall
The month with the least rainfall is September, when the rain falls for 8.9 days and typically collects 0.75" (19mm) of precipitation.Snowfall
In Brunswick, snow does not fall in May through September.Daylight
In September, the average length of the day is 12h and 30min.On the first day of the month, sunrise is at 6:04 am and sunset at 7:15 pm. On the last day of September, in Brunswick, sunrise is at 6:37 am and sunset at 6:22 pm EDT.
Sunshine
In Brunswick, the average sunshine in September is 8.6h.UV index
In Brunswick, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: During September, 4 as the daily maximum UV index converts into the following advice:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. To protect against the Sun's most potent rays, avoid direct exposure around midday. Experience reduced UV exposure by about half when donning a wide-brim hat.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September in Brunswick?
What is the driest month?
How much does it rain in Brunswick in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How long on average sun shines in September in Brunswick?
How high is the UV index in September?
Average temperature in September
Brunswick, ME
- Average high temperature in September: 67.1°F
The warmest months (with the highest average high temperature) are July and August (73.4°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in September: 54.3°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in September
Brunswick, ME
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is September (30.05"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Brunswick, ME
- Average wind speed in September: 7.8mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).
Average humidity in September
Brunswick, ME
- Average humidity in September: 79%
The months with the highest relative humidity are June and July (82%).
The month with the lowest relative humidity is November (75%).
Average rainfall in September
Brunswick, ME
- Average rainfall in September: 0.75"
The wettest month (with the highest rainfall) is October (1.85").
The driest month (with the least rainfall) is September (0.75").
Average rainfall days in September
Brunswick, ME
- Average rainfall days in September: 8.9 days
The month with the highest number of rainy days is July (13.3 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in September
Brunswick, ME
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.95").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Brunswick, ME
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.5 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
Brunswick, 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 4min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).
Average sunshine days in September
Brunswick, ME
- Average sunshine days in September: 18.7 days
The month with the most sunshine days is January (19.6 days).
The month with the least sunshine days is April (15 days).
Average UV index in September
Brunswick, ME
- Average UV index in September: 4
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, November and December (UV index 2).
Average cloud cover in September
Brunswick, ME
- Average cloud cover in September: 33
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Brunswick, ME
- 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).
Brunswick, Maine, USA
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