September weather forecastWinthrop, ME
September
Weather in September
September, the first month of the autumn in Winthrop, is also an agreeable month, with an average temperature fluctuating between 68.9°F (20.5°C) and 50.5°F (10.3°C).Temperature
September signals a slight drop in average high-temperature, sliding from August's warm 76.1°F (24.5°C) to an agreeable 68.9°F (20.5°C). Winthrop throughout September, experiences an average nighttime temperature of 50.5°F (10.3°C).Humidity
In Winthrop, Maine, the average relative humidity in September is 80%.Rainfall
September is the month with the least rainfall. Rain falls for 9.8 days and accumulates 1.42" (36mm) of precipitation.Snowfall
June through September are months without snowfall in Winthrop, Maine.Daylight
The average length of the day in September is 12h and 30min.On the first day of the month, sunrise is at 6:03 am and sunset at 7:15 pm. On the last day of September, sunrise is at 6:37 am and sunset at 6:21 pm EDT.
Sunshine
In Winthrop, the average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 4 during September translates into these guidelines:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. When the Sun is at its strongest around midday, find shade and limit exposure. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Winthrop, ME
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is July (76.6°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in September: 50.5°F
The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is January (13.6°F).
Average pressure in September
Winthrop, ME
- Average pressure in September: 30.04"Hg
The months with the highest atmospheric pressure are September and November (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Winthrop, ME
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
Winthrop, ME
- Average humidity in September: 80%
The months with the highest relative humidity are January, February and March (83%).
The month with the lowest relative humidity is November (76%).
Average rainfall in September
Winthrop, ME
- Average rainfall in September: 1.42"
The wettest month (with the highest rainfall) is October (2.95").
The driest month (with the least rainfall) is September (1.42").
Average rainfall days in September
Winthrop, ME
- Average rainfall days in September: 9.8 days
The month with the highest number of rainy days is June (16 days).
The month with the least rainy days is January (7 days).
Average snowfall in September
Winthrop, ME
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.77").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Winthrop, ME
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Winthrop, 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 30min
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 36min).
Average sunshine days in September
Winthrop, ME
- Average sunshine days in September: 17.7 days
The month with the most sunshine days is September (17.7 days).
The month with the least sunshine days is April (11.6 days).
Average UV index in September
Winthrop, 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, October, November and December (UV index 2).
Average cloud cover in September
Winthrop, ME
- Average cloud cover in September: 36
The months with the most cloud cover are March and April (Cloud cover 52).
The months with the least cloud cover are August and September (Cloud cover 36).
Average visibility in September
Winthrop, ME
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, October, November and December (6mi).
The months with the lowest visibility are May, June, July, August and September (5mi).
