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 brings a slight decrease in the average high-temperature, shifting from a moderately hot 76.1°F (24.5°C) in August to an agreeable 68.9°F (20.5°C). In September, the nighttime temperature lowers to an average of 48.9°F (9.4°C).Humidity
In September, the average relative humidity is 80%.Rainfall
In Palmyra, in September, it is raining for 11.3 days, with typically 1.89" (48mm) of accumulated precipitation. In Palmyra, during the entire year, the rain falls for 149.1 days and collects up to 31.22" (793mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Palmyra, the average length of the day in September is 12h and 31min.On the first day of September, sunrise is at 6:00 am and sunset at 7:13 pm. On the last day of the month, sunrise is at 6:35 am and sunset at 6:19 pm EDT.
Sunshine
In September, the average sunshine is 8.2h.UV index
In September, the average daily maximum UV index in Palmyra is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, the maximum UV index of 4 suggests this advice:
Undertake protective steps - Recommendations to avoid sunburn are issued. To protect against the Sun's most potent rays, avoid direct exposure around midday. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Palmyra have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Palmyra have in September?
What is the UV index intensity in September?
Average temperature in September
Palmyra, ME
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is July (76.8°F).
The month with the lowest average high temperature is January (25.3°F).
- Average low temperature in September: 48.9°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 (11.8°F).
Average pressure in September
Palmyra, ME
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is September (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Palmyra, ME
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is March (8mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in September
Palmyra, ME
- Average humidity in September: 80%
The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are April, May and November (78%).
Average rainfall in September
Palmyra, ME
- Average rainfall in September: 1.89"
The wettest months (with the highest rainfall) are April and October (3.31").
The driest month (with the least rainfall) is July (1.77").
Average rainfall days in September
Palmyra, ME
- Average rainfall days in September: 11.3 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is January (7 days).
Average snowfall in September
Palmyra, ME
- Average snowfall in September: 0"
The month with the highest snowfall is January (9.49").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Palmyra, ME
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (13.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Palmyra, ME
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in September
Palmyra, ME
- Average sunshine days in September: 16.7 days
The month with the most sunshine days is September (16.7 days).
The month with the least sunshine days is April (11.2 days).
Average UV index in September
Palmyra, ME
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in September
Palmyra, ME
- Average cloud cover in September: 39
The months with the most cloud cover are February, March and April (Cloud cover 54).
The months with the least cloud cover are August and September (Cloud cover 39).
Average visibility in September
Palmyra, ME
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Palmyra, Maine, USA
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