September weather forecastMerrill Corner, ME
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Merrill Corner, Maine, with temperature in the range of an average low of 49.1°F (9.5°C) and an average high of 70.3°F (21.3°C).Temperature
With the arrival of September, Merrill Corner experiences a modest decline in average high-temperatures, transitioning from a moderately hot 77.2°F (25.1°C) in August to a pleasant 70.3°F (21.3°C). During September, the average low-temperature is recorded at a frosty 49.1°F (9.5°C).Humidity
The average relative humidity in September is 78%.Rainfall
The month with the least rainfall in Merrill Corner is September, when the rain falls for 9.7 days and typically collects 1.22" (31mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Merrill Corner, the average length of the day in September is 12h and 30min.On the first day of September in Merrill Corner, Maine, sunrise is at 6:07 am and sunset at 7:19 pm. On the last day of the month, sunrise is at 6:41 am and sunset at 6:25 pm EDT.
Sunshine
The average sunshine in September is 8.5h.UV index
The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: A typical high UV index of 3 in September suggests the following recommendations:
Put precautions into practice - Ensuring skin and eye safety is a necessity. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Merrill Corner, ME
- Average high temperature in September: 70.3°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (26.1°F).
- Average low temperature in September: 49.1°F
The month with the highest average low temperature is July (56.5°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).
Average pressure in September
Merrill Corner, ME
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Merrill Corner, ME
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in September
Merrill Corner, ME
- Average humidity in September: 78%
The months with the highest relative humidity are January and February (85%).
The month with the lowest relative humidity is November (76%).
Average rainfall in September
Merrill Corner, ME
- Average rainfall in September: 1.22"
The wettest months (with the highest rainfall) are April and October (2.64").
The driest month (with the least rainfall) is September (1.22").
Average rainfall days in September
Merrill Corner, ME
- Average rainfall days in September: 9.7 days
The months with the highest number of rainy days are April and July (14.3 days).
The month with the least rainy days is February (6.3 days).
Average snowfall in September
Merrill Corner, ME
- Average snowfall in September: 0"
The month with the highest snowfall is February (9.88").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Merrill Corner, ME
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (11.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Merrill Corner, 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 6min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in September
Merrill Corner, ME
- Average sunshine days in September: 18.4 days
The month with the most sunshine days is September (18.4 days).
The month with the least sunshine days is April (12.4 days).
Average UV index in September
Merrill Corner, ME
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in September
Merrill Corner, ME
- Average cloud cover in September: 36
The month with the most cloud cover is March (Cloud cover 51).
The months with the least cloud cover are August and September (Cloud cover 36).
Average visibility in September
Merrill Corner, ME
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January and February (4mi).
