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
September sees a slight reduction in average high-temperature, with a shift from an agreeable 68.7°F (20.4°C) in August to a refreshing 63.3°F (17.4°C). September nights in South Thomaston register a minor temperature decline, steadying at 55.6°F (13.1°C).Humidity
In September, the average relative humidity in South Thomaston is 81%.Rainfall
September is the month with the least rainfall. Rain falls for 10.4 days and accumulates 1.81" (46mm) of precipitation.Snowfall
May through October are months without snowfall in South Thomaston, Maine.Ocean temperature
In September, the average ocean temperature is 58.3°F (14.6°C).Note: Entering waters of 58.3°F (14.6°C) is life-endangering. A mere moment in 55.4°F (13°C) waters feels piercing cold, and below 50°F (10°C) it can lead to immediate cold shock and cessation of breathing control, depending on body resilience.
Daylight
In September, the average length of the day in South Thomaston is 12h and 30min.On the first day of September, sunrise is at 6:00 am and sunset at 7:12 pm. On the last day of the month, sunrise is at 6:33 am and sunset at 6:18 pm EDT.
Sunshine
The average sunshine in September in South Thomaston is 8.5h.UV index
In South Thomaston, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The maximum UV index of 4 during September leads to these instructions:
Make use of precautions - Suggestions to resist sunburn are communicated. Around midday, solar radiation is most harmful; hence, exposure should be limited. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in South Thomaston?
What is the average humidity in September in South Thomaston?
What is the driest month in South Thomaston?
How much does it rain in South Thomaston in September?
When it does not snow in South Thomaston?
What is the ocean temperature in September in South Thomaston?
What is the average length of the day in September in South Thomaston?
What time are sunrise and sunset in September in South Thomaston?
How long on average sun shines in September in South Thomaston?
How high is the UV index in September in South Thomaston?
Average temperature in September
South Thomaston, ME
- Average high temperature in September: 63.3°F
The warmest month (with the highest average high temperature) is August (68.7°F).
The month with the lowest average high temperature is January (31.8°F).
- Average low temperature in September: 55.6°F
The month with the highest average low temperature is August (60.6°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).
Average pressure in September
South Thomaston, 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
South Thomaston, ME
- Average wind speed in September: 9.6mph
The windiest month (with the highest average wind speed) is January (14.9mph).
The calmest months (with the lowest average wind speed) are July and August (8.2mph).
Average humidity in September
South Thomaston, ME
- Average humidity in September: 81%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is November (75%).
Average rainfall in September
South Thomaston, ME
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is December (3.35").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in September
South Thomaston, ME
- Average rainfall days in September: 10.4 days
The month with the highest number of rainy days is April (15.8 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in September
South Thomaston, ME
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.83").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
South Thomaston, ME
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.5 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in September
South Thomaston, ME
- Average sea temperature in September: 58.3°F
The best month for swimming (with the highest average sea temperature) is August (60.4°F).
The coldest month (with the lowest average sea temperature) is March (37.8°F).
Average daylight in September /
Average sunshine in September
South Thomaston, 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 30min).
The month with the least sunshine is December (Average sunshine: 4h and 30min).
Average sunshine days in September
South Thomaston, ME
- Average sunshine days in September: 18 days
The month with the most sunshine days is September (18 days).
The month with the least sunshine days is April (11.5 days).
Average UV index in September
South Thomaston, 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
South Thomaston, ME
- Average cloud cover in September: 32
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
South Thomaston, 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).
South Thomaston, Maine, USA
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