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
In Lebanon, the average high-temperature in September slightly decreases from a moderately hot 75.7°F (24.3°C) in August to an agreeable 68.9°F (20.5°C). Lebanon's temperature in September lowers to a consistent average of 53.6°F (12°C) during the nights.Humidity
In September, the average relative humidity is 79%.Rainfall
September is the month with the least rainfall. Rain falls for 9.5 days and accumulates 0.67" (17mm) of precipitation.Snowfall
June through October are months without snowfall.Daylight
In Lebanon, the average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:08 am and sunset at 7:18 pm. On the last day of September, sunrise is at 6:40 am and sunset at 6:26 pm EDT.
Sunshine
The average sunshine in September is 8.4h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In September, a daily maximum UV index of 4 leads to the following instructions:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
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 many days does it rain in September?
When it does not snow?
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?
How high is the UV index in September?
Average temperature in September
Lebanon, ME
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is July (76.3°F).
The month with the lowest average high temperature is January (30°F).
- Average low temperature in September: 53.6°F
The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure in September
Lebanon, ME
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Lebanon, ME
- Average wind speed in September: 6.7mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in September
Lebanon, ME
- Average humidity in September: 79%
The months with the highest relative humidity are January and February (82%).
The months with the lowest relative humidity are April and November (76%).
Average rainfall in September
Lebanon, ME
- Average rainfall in September: 0.67"
The wettest month (with the highest rainfall) is October (1.54").
The driest month (with the least rainfall) is September (0.67").
Average rainfall days in September
Lebanon, ME
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is May (12.9 days).
The month with the least rainy days is January (5.6 days).
Average snowfall in September
Lebanon, ME
- Average snowfall in September: 0"
The month with the highest snowfall is December (2.83").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Lebanon, ME
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Lebanon, 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 30min).
The months with the least sunshine are February and December (Average sunshine: 4h and 54min).
Average sunshine days in September
Lebanon, ME
- Average sunshine days in September: 18.4 days
The month with the most sunshine days is January (19.6 days).
The month with the least sunshine days is April (14.2 days).
Average UV index in September
Lebanon, 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
Lebanon, ME
- Average cloud cover in September: 34
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Lebanon, 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).
Lebanon, Maine, USA
Weather forecast for your location
2. Allow the app to use your location