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's arrival subtly correlates with a reduction in the average high-temperature, down from a warm 76.6°F (24.8°C) in August to a pleasant 69.8°F (21°C). In Monmouth, an average nighttime temperature of 50.2°F (10.1°C) is expected during September.Humidity
In September, the average relative humidity is 79%.Rainfall
September is the month with the least rainfall. Rain falls for 9 days and accumulates 0.91" (23mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 30min.On the first day of the month, sunrise is at 6:03 am and sunset at 7:15 pm. On the last day of September, sunrise is at 6:37 am and sunset at 6:22 pm EDT.
Sunshine
In Monmouth, the average sunshine in September is 8.5h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily high UV index of 4 during September translates into the following recommendations:
Ensure safety - Imperative it is to shield skin and eyes from damage. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. 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
What is the temperature in September in Monmouth?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Monmouth have in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Monmouth, ME
- Average high temperature in September: 69.8°F
The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is January (26.6°F).
- Average low temperature in September: 50.2°F
The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is January (13.3°F).
Average pressure in September
Monmouth, ME
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.05"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Monmouth, ME
- Average wind speed in September: 5.4mph
The windiest month (with the highest average wind speed) is March (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in September
Monmouth, ME
- Average humidity in September: 79%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is November (76%).
Average rainfall in September
Monmouth, ME
- Average rainfall in September: 0.91"
The wettest month (with the highest rainfall) is June (1.93").
The driest month (with the least rainfall) is September (0.91").
Average rainfall days in September
Monmouth, ME
- Average rainfall days in September: 9 days
The month with the highest number of rainy days is July (13.9 days).
The month with the least rainy days is February (4.2 days).
Average snowfall in September
Monmouth, ME
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.35").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Monmouth, ME
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Monmouth, 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 3min
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
Monmouth, ME
- Average sunshine days in September: 18.6 days
The month with the most sunshine days is January (20.1 days).
The month with the least sunshine days is July (13.8 days).
Average UV index in September
Monmouth, ME
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Monmouth, ME
- Average cloud cover in September: 35
The months with the most cloud cover are March and April (Cloud cover 51).
The month with the least cloud cover is September (Cloud cover 35).
Average visibility in September
Monmouth, ME
- Average visibility in September: 5mi
The months with the highest visibility are January, November and December (6mi).
The months with the lowest visibility are February, March, April, May, June, July, August, September and October (5mi).
Monmouth, Maine, USA
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