September weather forecastSouth Casco, ME
September
Weather in September
The first month of the autumn, September, is also an agreeable month in South Casco, Maine, with an average temperature varying between 69.6°F (20.9°C) and 51.3°F (10.7°C).Temperature
The arrival of September suggests a slight decrease in the average high-temperature, moving from a moderately hot 76.8°F (24.9°C) in August to an agreeable 69.6°F (20.9°C). South Casco temperatures generally rest at a low of 51.3°F (10.7°C) during the September nights.Humidity
In South Casco, the average relative humidity in September is 79%.Rainfall
The month with the least rainfall is September, when the rain falls for 9.2 days and typically collects 0.87" (22mm) of precipitation.Snowfall
June through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 30min.On the first day of September, sunrise is at 6:06 am and sunset at 7:17 pm. On the last day of the month, sunrise is at 6:39 am and sunset at 6:24 pm EDT.
Sunshine
In South Casco, the average sunshine in September is 8.5h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily high UV index of 4 in September translates into this advice:
Act with care - The need to guard against sun damage is communicated. To protect against the Sun's most potent rays, avoid direct exposure around midday. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
South Casco, ME
- Average high temperature in September: 69.6°F
The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is January (27.5°F).
- Average low temperature in September: 51.3°F
The month with the highest average low temperature is July (58.5°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure in September
South Casco, 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
South Casco, ME
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is January (7.6mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
South Casco, ME
- Average humidity in September: 79%
The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is November (76%).
Average rainfall in September
South Casco, ME
- Average rainfall in September: 0.87"
The wettest months (with the highest rainfall) are June and October (1.77").
The driest month (with the least rainfall) is September (0.87").
Average rainfall days in September
South Casco, ME
- Average rainfall days in September: 9.2 days
The months with the highest number of rainy days are June and July (14.3 days).
The month with the least rainy days is February (4.4 days).
Average snowfall in September
South Casco, ME
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.35").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
South Casco, ME
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (7.9 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
South Casco, 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 30min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).
Average sunshine days in September
South Casco, ME
- Average sunshine days in September: 18.5 days
The month with the most sunshine days is January (21.3 days).
The month with the least sunshine days is July (13.6 days).
Average UV index in September
South Casco, 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
South Casco, ME
- Average cloud cover in September: 34
The months with the most cloud cover are February and March (Cloud cover 50).
The months with the least cloud cover are August and September (Cloud cover 34).
Average visibility in September
South Casco, ME
- Average visibility in September: 5mi
The months with the highest visibility are January, March, April, October, November and December (6mi).
The months with the lowest visibility are February, May, June, July, August and September (5mi).
