September weather forecastWinter Harbor, ME
September
Weather in September
September, the first month of the autumn in Winter Harbor, is still a refreshing month, with temperature in the range of an average high of 67.1°F (19.5°C) and an average low of 52.7°F (11.5°C).Temperature
During the shift to September, Winter Harbor records a mild decrease in average high-temperature, moving from a warm 73.4°F (23°C) in August to a refreshing 67.1°F (19.5°C). Winter Harbor witnesses an average low-temperature of 52.7°F (11.5°C) throughout the month of September.Humidity
The average relative humidity in September is 79%.Rainfall
In September, the rain falls for 10.5 days. Throughout September, 1.81" (46mm) of precipitation is accumulated. Throughout the year, in Winter Harbor, there are 142.1 rainfall days, and 32.28" (820mm) of precipitation is accumulated.Snowfall
In Winter Harbor, snow does not fall in June through September.Daylight
In Winter Harbor, the average length of the day in September is 12h and 30min.On the first day of September, sunrise is at 5:55 am and sunset at 7:08 pm. On the last day of the month, sunrise is at 6:29 am and sunset at 6:14 pm EDT.
Sunshine
In Winter Harbor, the average sunshine in September is 8.2h.UV index
In Winter Harbor, Maine, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: In September, a regular UV index of 4 translates into these guidelines:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. 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
Average temperature in September
Winter Harbor, ME
- Average high temperature in September: 67.1°F
The warmest month (with the highest average high temperature) is August (73.4°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in September: 52.7°F
The month with the highest average low temperature is July (58.1°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).
Average pressure in September
Winter Harbor, ME
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is September (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Winter Harbor, ME
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in September
Winter Harbor, ME
- Average humidity in September: 79%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is November (76%).
Average rainfall in September
Winter Harbor, ME
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is December (3.94").
The driest month (with the least rainfall) is July (1.57").
Average rainfall days in September
Winter Harbor, ME
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is April (15.5 days).
The month with the least rainy days is February (7.5 days).
Average snowfall in September
Winter Harbor, ME
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.75").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Winter Harbor, ME
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Winter Harbor, ME
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 8h and 12min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days in September
Winter Harbor, ME
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is August (18.7 days).
The month with the least sunshine days is April (11.2 days).
Average UV index in September
Winter Harbor, 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
Winter Harbor, ME
- Average cloud cover in September: 35
The month with the most cloud cover is February (Cloud cover 56).
The months with the least cloud cover are August and September (Cloud cover 35).
Average visibility in September
Winter Harbor, ME
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
