September weather forecastMonticello, ME
September
Weather in September
September, the first month of the autumn in Monticello, is still a comfortable month, with an average temperature ranging between max 66.4°F (19.1°C) and min 47.1°F (8.4°C).Temperature
Monticello's transition into September involves a gentle shift in temperature, receding from a moderately hot 74.5°F (23.6°C) in August to a comfortable 66.4°F (19.1°C). Monticello records an average nighttime low of 47.1°F (8.4°C) in September.Humidity
The average relative humidity in September is 80%.Rainfall
In Monticello, during September, the rain falls for 12.6 days and regularly aggregates up to 2.32" (59mm) of precipitation. In Monticello, Maine, during the entire year, the rain falls for 147.4 days and collects up to 31.81" (808mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 32min.On the first day of September, sunrise is at 5:52 am and sunset at 7:09 pm. On the last day of the month, sunrise is at 6:29 am and sunset at 6:12 pm EDT.
Sunshine
In Monticello, the average sunshine in September is 7.4h.UV index
The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: An average maximum UV index of 3 in September leads to these recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Monticello, ME
- Average high temperature in September: 66.4°F
The warmest month (with the highest average high temperature) is July (75.9°F).
The month with the lowest average high temperature is January (21.9°F).
- Average low temperature in September: 47.1°F
The month with the highest average low temperature is July (55.2°F).
The coldest month (with the lowest average low temperature) is January (7.7°F).
Average pressure in September
Monticello, ME
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is September (30.03"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Monticello, ME
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in September
Monticello, ME
- Average humidity in September: 80%
The months with the highest relative humidity are January, February and March (91%).
The month with the lowest relative humidity is May (76%).
Average rainfall in September
Monticello, ME
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is December (3.27").
The driest month (with the least rainfall) is July (2.17").
Average rainfall days in September
Monticello, ME
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is July (17.2 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in September
Monticello, ME
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (13.07").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Monticello, ME
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (19.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Monticello, ME
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 7h and 24min
The month with the most sunshine is August (Average sunshine: 9h and 36min).
The month with the least sunshine is February (Average sunshine: 2h and 36min).
Average sunshine days in September
Monticello, 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 April (8.7 days).
Average UV index in September
Monticello, ME
- Average UV index in September: 3
The months with the highest UV index are June and 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
Monticello, ME
- Average cloud cover in September: 44
The month with the most cloud cover is February (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 42).
Average visibility in September
Monticello, ME
- Average visibility in September: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (5mi).
The months with the lowest visibility are January, February, March and December (4mi).
