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
The shift from August to September includes a minor decrease in the average high-temperature, lightly dropping from a moderately hot 76.5°F (24.7°C) to an agreeable 68.9°F (20.5°C). During the month of September, an average low-temperature of 48.9°F (9.4°C) is recorded.Humidity
In Waterville, the average relative humidity in September is 80%.Rainfall
September is the month with the least rainfall. Rain falls for 9.7 days and accumulates 1.54" (39mm) of precipitation.Snowfall
June through September are months without snowfall in Waterville.Daylight
In Waterville, the average length of the day in September is 12h and 31min.On the first day of the month, sunrise is at 6:01 am and sunset at 7:14 pm. On the last day of September, sunrise is at 6:36 am and sunset at 6:20 pm EDT.
Sunshine
In Waterville, Maine, the average sunshine in September is 8.1h.UV index
In September, the average daily maximum UV index in Waterville, Maine, is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index of 4 in September interprets into the following recommendations:
Be vigilant - Preventing sunburn is recommended. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Frequently asked questions
What are the temperatures in Waterville in September?
What is the average humidity in September in Waterville?
What is the driest month in Waterville?
How much does it rain in Waterville in September?
When it does not snow in Waterville?
Does it snow in Waterville in September?
What is the average length of the day in September in Waterville?
When are sunrise and sunset in September in Waterville?
How long on average sun shines in September in Waterville?
What is the UV index intensity in September in Waterville?
Average temperature in September
Waterville, ME
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is January (25.3°F).
- Average low temperature in September: 48.9°F
The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).
Average pressure in September
Waterville, 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
Waterville, ME
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is March (8mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in September
Waterville, ME
- Average humidity in September: 80%
The months with the highest relative humidity are February and March (85%).
The months with the lowest relative humidity are April and November (78%).
Average rainfall in September
Waterville, ME
- Average rainfall in September: 1.54"
The wettest month (with the highest rainfall) is April (3.03").
The driest month (with the least rainfall) is September (1.54").
Average rainfall days in September
Waterville, ME
- Average rainfall days in September: 9.7 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (5.6 days).
Average snowfall in September
Waterville, ME
- Average snowfall in September: 0"
The month with the highest snowfall is January (8.07").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Waterville, ME
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Waterville, 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 1min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).
Average sunshine days in September
Waterville, ME
- Average sunshine days in September: 17.7 days
The month with the most sunshine days is September (17.7 days).
The month with the least sunshine days is April (11.5 days).
Average UV index in September
Waterville, 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
Waterville, ME
- Average cloud cover in September: 40
The months with the most cloud cover are February, March and April (Cloud cover 54).
The months with the least cloud cover are August and September (Cloud cover 40).
Average visibility in September
Waterville, ME
- Average visibility in September: 5mi
The months with the highest visibility are November and December (6mi).
The month with the lowest visibility is August (4mi).
Waterville, Maine, USA
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