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
As August transitions into September, Monhegan sees a gentle drop in the average high-temperature, transitioning from a pleasant 72.7°F (22.6°C) to a refreshing 66.6°F (19.2°C). An average low-temperature of 53.4°F (11.9°C) is noted in Monhegan during the month of September.Humidity
In September, the average relative humidity in Monhegan is 81%.Rainfall
In Monhegan, in September, during 10.1 rainfall days, 1.61" (41mm) of precipitation is typically accumulated. Throughout the year, there are 144.1 rainfall days, and 29.29" (744mm) of precipitation is accumulated.Snowfall
In Monhegan, snow does not fall in May through September.Daylight
In Monhegan, Maine, the average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:01 am and sunset at 7:12 pm. On the last day of September, sunrise is at 6:34 am and sunset at 6:19 pm EDT.
Sunshine
In Monhegan, the average sunshine in September is 8.5h.UV index
The average daily maximum UV index in September in Monhegan is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 4 in September translates into these instructions:
Adopt protective measures - Suggestions to resist sunburn are offered. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Frequently asked questions
What are September temperatures in Monhegan?
What is the average humidity in September in Monhegan?
How many days does it rain in September in Monhegan?
When it does not snow in Monhegan?
Does it snow in Monhegan in September?
How many hours of daylight does Monhegan have in September?
When is the sunrise / sunset in September in Monhegan?
How many hours of sunshine does Monhegan have in September?
What is the UV index reading in September in Monhegan?
Average temperature in September
Monhegan, ME
- Average high temperature in September: 66.6°F
The warmest month (with the highest average high temperature) is August (72.7°F).
The month with the lowest average high temperature is January (29.8°F).
- Average low temperature in September: 53.4°F
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in September
Monhegan, 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
Monhegan, ME
- Average wind speed in September: 7.9mph
The windiest month (with the highest average wind speed) is January (11.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in September
Monhegan, ME
- Average humidity in September: 81%
The months with the highest relative humidity are June and July (83%).
The month with the lowest relative humidity is November (76%).
Average rainfall in September
Monhegan, ME
- Average rainfall in September: 1.61"
The wettest month (with the highest rainfall) is December (3.27").
The driest month (with the least rainfall) is July (1.57").
Average rainfall days in September
Monhegan, ME
- Average rainfall days in September: 10.1 days
The month with the highest number of rainy days is May (15.5 days).
The month with the least rainy days is January (7.5 days).
Average snowfall in September
Monhegan, ME
- Average snowfall in September: 0"
The month with the highest snowfall is January (4.37").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Monhegan, ME
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Monhegan, 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 3min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The months with the least sunshine are February and December (Average sunshine: 4h and 36min).
Average sunshine days in September
Monhegan, 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 (11.4 days).
Average UV index in September
Monhegan, 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, November and December (UV index 2).
Average cloud cover in September
Monhegan, ME
- Average cloud cover in September: 33
The months with the most cloud cover are February, March, April and December (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Monhegan, 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).
Monhegan, Maine, USA
Weather forecast for your location
2. Allow the app to use your location
