Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September marks a gentle change in average high-temperature, declining from August's moderately hot 73.9°F (23.3°C) to a refreshing 65.3°F (18.5°C). Throughout the nights in September, an average low-temperature of 46°F (7.8°C) is noted.Humidity
The average relative humidity in September is 80%.Rainfall
In Portage, in September, during 13.7 rainfall days, 2.32" (59mm) of precipitation is typically accumulated. In Portage, during the entire year, the rain falls for 144.3 days and collects up to 32.13" (816mm) 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 the month, sunrise is at 5:54 am and sunset at 7:12 pm. On the last day of September, in Portage, sunrise is at 6:32 am and sunset at 6:15 pm EDT.
Sunshine
In Portage, the average sunshine in September is 7.3h.UV index
In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 3 during September translates into the following recommendations:
Exercise prevention - Precautions against solar damage are endorsed. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Always opt for UVA and UVB-resistant sunglasses on radiant days.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Portage in September?
What is the average humidity in September?
How much does it rain in Portage in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Portage have in September?
When are sunrise and sunset in September in Portage?
How many hours of sunshine does Portage have in September?
What is the UV index intensity in September in Portage?
Average temperature in September
Portage, ME
- Average high temperature in September: 65.3°F
The warmest month (with the highest average high temperature) is July (75.2°F).
The month with the lowest average high temperature is January (19.8°F).
- Average low temperature in September: 46°F
The month with the highest average low temperature is July (54.9°F).
The coldest month (with the lowest average low temperature) is January (5.4°F).
Average pressure in September
Portage, ME
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is September (30.02"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Portage, ME
- Average wind speed in September: 6.9mph
The windiest months (with the highest average wind speed) are January, February and March (8.2mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in September
Portage, ME
- Average humidity in September: 80%
The month with the highest relative humidity is March (93%).
The month with the lowest relative humidity is May (75%).
Average rainfall in September
Portage, ME
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is December (3.19").
The driest month (with the least rainfall) is February (2.2").
Average rainfall days in September
Portage, ME
- Average rainfall days in September: 13.7 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in September
Portage, ME
- Average snowfall in September: 0"
The month with the highest snowfall is January (15.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Portage, ME
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (20.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Portage, ME
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 7h and 2min
The month with the most sunshine is August (Average sunshine: 9h and 30min).
The month with the least sunshine is February (Average sunshine: 2h and 6min).
Average sunshine days in September
Portage, ME
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is February (7.9 days).
Average UV index in September
Portage, 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
Portage, ME
- Average cloud cover in September: 45
The month with the most cloud cover is February (Cloud cover 74).
The months with the least cloud cover are July and August (Cloud cover 43).
Average visibility in September
Portage, ME
- Average visibility in September: 5mi
The months with the highest visibility are May, June, July, August, September, October and November (5mi).
The months with the lowest visibility are January, February, March, April and December (4mi).
Portage, Maine, USA
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