September weather forecastWestbrook, ME
September
Weather in September
September witnesses a gentle transition into fall in Westbrook. Temperatures cool down but remain pleasant. While there is a perceptible decrease in temperature and humidity, conditions remain comfortable. As September progresses, leaves start changing color, providing a yearly visual treat for residents and visitors. Despite shorter daylight hours, most days see a good amount of sunshine.Temperature
With the arrival of September, Westbrook experiences a modest decline in average high-temperatures, transitioning from a warm 73.9°F (23.3°C) in August to a comfortable 67.3°F (19.6°C). The low-temperature averages to a cool 54.7°F (12.6°C) during the nights of September.Humidity
In September, the average relative humidity is 79%.Rainfall
September is the month with the least rainfall. Rain falls for 9.5 days and accumulates 0.79" (20mm) of precipitation.Snowfall
In Westbrook, 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, sunrise is at 6:05 am and sunset at 7:16 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 6:23 pm EDT.
Sunshine
The average sunshine in September is 8.7h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum daily UV index of 4 during September morphs into the following directions:
Act with care - The suggestion to avoid sunburn is emphasized. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Westbrook, ME
- Average high temperature in September: 67.3°F
The warmest month (with the highest average high temperature) is August (73.9°F).
The month with the lowest average high temperature is January (30.4°F).
- Average low temperature in September: 54.7°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in September
Westbrook, ME
- Average pressure in September: 30.05"Hg
The months with the highest atmospheric pressure are September and November (30.05"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Westbrook, ME
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest months (with the lowest average wind speed) are July and August (6.7mph).
Average humidity in September
Westbrook, ME
- Average humidity in September: 79%
The month with the highest relative humidity is June (82%).
The month with the lowest relative humidity is November (75%).
Average rainfall in September
Westbrook, ME
- Average rainfall in September: 0.79"
The wettest month (with the highest rainfall) is October (1.97").
The driest month (with the least rainfall) is September (0.79").
Average rainfall days in September
Westbrook, ME
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is July (13.8 days).
The month with the least rainy days is January (5 days).
Average snowfall in September
Westbrook, ME
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.15").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Westbrook, ME
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Westbrook, ME
- Average daylight in September: 12h and 30min
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 42min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).
Average sunshine days in September
Westbrook, ME
- Average sunshine days in September: 18.5 days
The month with the most sunshine days is January (19.7 days).
The month with the least sunshine days is July (15.3 days).
Average UV index in September
Westbrook, 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
Westbrook, ME
- Average cloud cover in September: 31
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Westbrook, 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).
