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 74.1°F (23.4°C) to a pleasant 68°F (20°C). September witnesses an average nighttime temperature of 54.7°F (12.6°C) in Cape Porpoise.Humidity
In September, the average relative humidity is 79%.Rainfall
September is the month with the least rainfall. Rain falls for 10.5 days and accumulates 1.34" (34mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 29min.On the first day of the month, sunrise is at 6:06 am and sunset at 7:16 pm. On the last day of September, in Cape Porpoise, sunrise is at 6:38 am and sunset at 6:24 pm EDT.
Sunshine
In September, the average sunshine is 8.3h.UV index
In Cape Porpoise, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: An average maximum UV index of 4 in September leads to these recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. The solar radiation around mid-day is intense; avoid the Sun and stay safe. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
When it does not snow in Cape Porpoise?
Does it snow in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Cape Porpoise, ME
- Average high temperature in September: 68°F
The warmest month (with the highest average high temperature) is July (74.5°F).
The month with the lowest average high temperature is January (30.7°F).
- Average low temperature in September: 54.7°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in September
Cape Porpoise, 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
Cape Porpoise, ME
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest months (with the lowest average wind speed) are July and August (6.7mph).
Average humidity in September
Cape Porpoise, ME
- Average humidity in September: 79%
The months with the highest relative humidity are June and July (82%).
The month with the lowest relative humidity is November (75%).
Average rainfall in September
Cape Porpoise, ME
- Average rainfall in September: 1.34"
The wettest month (with the highest rainfall) is October (2.95").
The driest month (with the least rainfall) is September (1.34").
Average rainfall days in September
Cape Porpoise, ME
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is April (14.3 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in September
Cape Porpoise, ME
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.41").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Cape Porpoise, ME
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Cape Porpoise, ME
- Average daylight in September: 12h and 3min
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 2min
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 42min).
Average sunshine days in September
Cape Porpoise, ME
- Average sunshine days in September: 18.3 days
The month with the most sunshine days is September (18.3 days).
The month with the least sunshine days is April (12.9 days).
Average UV index in September
Cape Porpoise, ME
- Average UV index in September: 4
The month with the highest UV index is August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Cape Porpoise, ME
- Average cloud cover in September: 34
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Cape Porpoise, ME
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Cape Porpoise, Maine, USA
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