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
September reveals a small adjustment in temperature, transitioning from an average high of a warm 77.4°F (25.2°C) in August to an agreeable 70°F (21.1°C). During September, Naples consistently records a temperature low averaging a frosty 49.1°F (9.5°C).Humidity
The average relative humidity in September is 79%.Rainfall
The month with the least rainfall is September, when the rain falls for 11.5 days and typically collects 1.54" (39mm) of precipitation.Snowfall
In Naples, Maine, snow does not fall in June through September.Daylight
In Naples, the average length of the day in September is 12h and 30min.On the first day of September, sunrise is at 6:06 am and sunset at 7:17 pm. On the last day of the month, sunrise is at 6:39 am and sunset at 6:24 pm EDT.
Sunshine
In Naples, the average sunshine in September is 8.4h.UV index
The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 3 suggests these recommendations:
Exercise prevention - Protecting skin and eyes from harm is required. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Boost your sun resistance with garments that are densely woven yet spacious.
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 much does it rain in Naples in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Naples, ME
- Average high temperature in September: 70°F
The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (26.2°F).
- Average low temperature in September: 49.1°F
The month with the highest average low temperature is July (57°F).
The coldest month (with the lowest average low temperature) is January (11.8°F).
Average pressure in September
Naples, ME
- Average pressure in September: 30.05"Hg
The months with the highest atmospheric pressure are September and November (30.05"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Naples, ME
- Average wind speed in September: 4.8mph
The windiest months (with the highest average wind speed) are March and April (6.3mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in September
Naples, ME
- Average humidity in September: 79%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is November (76%).
Average rainfall in September
Naples, ME
- Average rainfall in September: 1.54"
The wettest month (with the highest rainfall) is October (3.31").
The driest month (with the least rainfall) is September (1.54").
Average rainfall days in September
Naples, ME
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is June (16.6 days).
The month with the least rainy days is February (8.3 days).
Average snowfall in September
Naples, ME
- Average snowfall in September: 0"
The month with the highest snowfall is February (10.24").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Naples, ME
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is March (12.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Naples, 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 6min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in September
Naples, ME
- Average sunshine days in September: 16.7 days
The months with the most sunshine days are September and November (16.7 days).
The months with the least sunshine days are April and June (10.6 days).
Average UV index in September
Naples, ME
- Average UV index in September: 3
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
Naples, ME
- Average cloud cover in September: 37
The months with the most cloud cover are February and March (Cloud cover 51).
The months with the least cloud cover are August and September (Cloud cover 37).
Average visibility in September
Naples, ME
- Average visibility in September: 5mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (5mi).
The month with the lowest visibility is February (4mi).
Naples, Maine, USA
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