September weather forecastGreenville Junction, ME
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Greenville Junction, Maine, with an average temperature varying between 65.5°F (18.6°C) and 46°F (7.8°C).Temperature
In Greenville Junction, the average high-temperature in September slightly decreases from an agreeable 73°F (22.8°C) in August to a refreshing 65.5°F (18.6°C). Greenville Junction's nighttime temperature during September is consistently averaged at a chilly 46°F (7.8°C).Humidity
The average relative humidity in September is 80%.Rainfall
In Greenville Junction, in September, during 12.5 rainfall days, 2.44" (62mm) of precipitation is typically accumulated. Throughout the year, there are 147.1 rainfall days, and 34.65" (880mm) of precipitation is accumulated.Snowfall
In Greenville Junction, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 31min.On the first day of September, sunrise is at 6:00 am and sunset at 7:15 pm. On the last day of the month, sunrise is at 6:36 am and sunset at 6:20 pm EDT.
Sunshine
The average sunshine in September is 7.4h.UV index
In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In September, a daily maximum UV index of 3 leads to the following instructions:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Greenville Junction, ME
- Average high temperature in September: 65.5°F
The warmest month (with the highest average high temperature) is July (74.8°F).
The month with the lowest average high temperature is January (20.8°F).
- Average low temperature in September: 46°F
The month with the highest average low temperature is July (54.5°F).
The coldest month (with the lowest average low temperature) is January (7.9°F).
Average pressure in September
Greenville Junction, 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 (29.9"Hg).
Average wind speed in September
Greenville Junction, ME
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is March (7.9mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in September
Greenville Junction, ME
- Average humidity in September: 80%
The month with the highest relative humidity is February (90%).
The month with the lowest relative humidity is May (77%).
Average rainfall in September
Greenville Junction, ME
- Average rainfall in September: 2.44"
The wettest month (with the highest rainfall) is April (3.54").
The driest month (with the least rainfall) is February (2.24").
Average rainfall days in September
Greenville Junction, ME
- Average rainfall days in September: 12.5 days
The months with the highest number of rainy days are July and August (17.8 days).
The month with the least rainy days is February (4.4 days).
Average snowfall in September
Greenville Junction, ME
- Average snowfall in September: 0"
The month with the highest snowfall is January (14.33").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Greenville Junction, ME
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (20.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Greenville Junction, ME
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 7h and 24min
The month with the most sunshine is August (Average sunshine: 9h and 12min).
The month with the least sunshine is February (Average sunshine: 2h and 36min).
Average sunshine days in September
Greenville Junction, ME
- Average sunshine days in September: 15.1 days
The month with the most sunshine days is September (15.1 days).
The month with the least sunshine days is February (8.1 days).
Average UV index in September
Greenville Junction, ME
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in September
Greenville Junction, ME
- Average cloud cover in September: 46
The month with the most cloud cover is February (Cloud cover 73).
The months with the least cloud cover are July and August (Cloud cover 45).
Average visibility in September
Greenville Junction, ME
- Average visibility in September: 4mi
The months with the highest visibility are May, July, October and November (5mi).
The months with the lowest visibility are January, February, March, April, June, August, September and December (4mi).
