September weather forecastShirley Mills, ME
September
Weather in September
The first month of the autumn, September, is still a comfortable month in Shirley Mills, Maine, with an average temperature ranging between max 65.5°F (18.6°C) and min 46°F (7.8°C).Temperature
A subtle shift in Shirley Mills's weather is observed as August turns into September, with the average high temperature reducing from a pleasant 73°F (22.8°C) to a refreshing 65.5°F (18.6°C). Throughout September, Shirley Mills records an average temperature of 46°F (7.8°C) at night.Humidity
In September, the average relative humidity is 80%.Rainfall
In Shirley Mills, during September, the rain falls for 12.5 days and regularly aggregates up to 2.44" (62mm) of precipitation. Throughout the year, there are 147.1 rainfall days, and 34.65" (880mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In Shirley Mills, the average length of the day in September is 12h and 31min.On the first day of the month, sunrise is at 6:00 am and sunset at 7:15 pm. On the last day of September, in Shirley Mills, 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 Shirley Mills, Maine, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In September, a daily maximum UV index of 3 leads to the following instructions:
Exercise prevention - Precautions against solar damage are endorsed. The solar radiation around mid-day is intense; avoid the Sun and stay safe. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Shirley Mills, 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
Shirley Mills, 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
Shirley Mills, 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
Shirley Mills, 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
Shirley Mills, 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
Shirley Mills, 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
Shirley Mills, 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
Shirley Mills, 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
Shirley Mills, 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
Shirley Mills, 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
Shirley Mills, 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
Shirley Mills, 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
Shirley Mills, 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).
