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 sea temperature 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
Boothbay Harbor in September experiences a gentle temperature dip, with average high-temperatures reducing from a warm 74.1°F (23.4°C) in August to an enjoyable 67.5°F (19.7°C). Boothbay Harbor encounters a steady low-temperature average of 53.6°F (12°C) throughout the month of September.Humidity
In Boothbay Harbor, the average relative humidity in September is 80%.Rainfall
The month with the least rainfall is September, when the rain falls for 10.8 days and typically collects 1.5" (38mm) of precipitation.Snowfall
In Boothbay Harbor, Maine, snow does not fall in June through October.Ocean temperature
In Boothbay Harbor, Maine, the average seawater temperature in September is 59.7°F (15.4°C).Note: In water with a temperature of 59.7°F (15.4°C), most people do not enjoy swimming. As the temperature descends from 69.8°F (21°C) to 59°F (15°C), breathing becomes increasingly difficult to control.
Daylight
The average length of the day in September is 12h and 30min.On the first day of September in Boothbay Harbor, sunrise is at 6:02 am and sunset at 7:13 pm. On the last day of the month, sunrise is at 6:35 am and sunset at 6:20 pm EDT.
Sunshine
The average sunshine in September in Boothbay Harbor, Maine, is 8.4h.UV index
In Boothbay Harbor, Maine, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: A daily high UV index of 4 in September leads to these guidelines:
Take necessary precautions - Defending against sun damage is advocated. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Frequently asked questions
What are the temperatures in Boothbay Harbor in September?
What is the average humidity in September in Boothbay Harbor?
What is the driest month in Boothbay Harbor?
How much does it rain in Boothbay Harbor in September?
When it does not snow in Boothbay Harbor?
What is the ocean temperature in September in Boothbay Harbor?
How many hours of daylight does Boothbay Harbor have in September?
When are sunrise and sunset in September in Boothbay Harbor?
How many hours of sunshine does Boothbay Harbor have in September?
What is the UV index reading in September in Boothbay Harbor?
Average temperature in September
Boothbay Harbor, ME
- Average high temperature in September: 67.5°F
The warmest months (with the highest average high temperature) are July and August (74.1°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in September: 53.6°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in September
Boothbay Harbor, ME
- Average pressure in September: 30.04"Hg
The months with the highest atmospheric pressure are September and November (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Boothbay Harbor, ME
- Average wind speed in September: 7.5mph
The windiest months (with the highest average wind speed) are January and March (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in September
Boothbay Harbor, ME
- Average humidity in September: 80%
The months with the highest relative humidity are June and July (82%).
The month with the lowest relative humidity is November (76%).
Average rainfall in September
Boothbay Harbor, ME
- Average rainfall in September: 1.5"
The wettest month (with the highest rainfall) is December (3.5").
The driest month (with the least rainfall) is September (1.5").
Average rainfall days in September
Boothbay Harbor, ME
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is April (15.1 days).
The month with the least rainy days is January (6.6 days).
Average snowfall in September
Boothbay Harbor, ME
- Average snowfall in September: 0"
The month with the highest snowfall is January (5.28").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Boothbay Harbor, ME
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (9.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in September
Boothbay Harbor, ME
- Average sea temperature in September: 59.7°F
The best month for swimming (with the highest average sea temperature) is August (62.2°F).
The coldest month (with the lowest average sea temperature) is March (37.9°F).
Average daylight in September /
Average sunshine in September
Boothbay Harbor, 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 36min).
Average sunshine days in September
Boothbay Harbor, ME
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is September (17.5 days).
The month with the least sunshine days is April (11.7 days).
Average UV index in September
Boothbay Harbor, ME
- Average UV index in September: 4
The month with the highest UV index is July (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
Boothbay Harbor, ME
- Average cloud cover in September: 34
The months with the most cloud cover are February and March (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
Boothbay Harbor, ME
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Boothbay Harbor, Maine, USA
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