September weather forecastSunapee, NH
September
Weather in September
The weather in September marks the beginning of autumn in Sunapee. A notable drop in temperature begins, and green landscapes start showing splashes of dazzling fall colors. While the weather remains relatively warm during the day, there is an unmistakable crispness in the air. The town transitions into autumn mode, preparing for the subsequent cooler months. As September concludes, there is a sense of excitement in the air for the upcoming charm of fall.Temperature
As Sunapee, New Hampshire, enters September, the average high-temperature subtly lowers from the a warm 76.6°F (24.8°C) of August to an agreeable 68.9°F (20.5°C). The average nighttime temperature in Sunapee lowers to a frosty 49.3°F (9.6°C) throughout September.Humidity
In September, the average relative humidity is 80%.Rainfall
September is the month with the least rainfall. Rain falls for 11.5 days and accumulates 2.05" (52mm) of precipitation.Snowfall
June through September are months without snowfall in Sunapee.Daylight
In September, the average length of the day is 12h and 29min.On the first day of September in Sunapee, sunrise is at 6:13 am and sunset at 7:23 pm. On the last day of the month, sunrise is at 6:45 am and sunset at 6:30 pm EDT.
Sunshine
In September, the average sunshine is 8.2h.UV index
In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 3 in September converts into the following recommendations:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sunapee, NH
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (25.9°F).
- Average low temperature in September: 49.3°F
The month with the highest average low temperature is July (57.2°F).
The coldest month (with the lowest average low temperature) is January (13.3°F).
Average pressure in September
Sunapee, NH
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Sunapee, NH
- Average wind speed in September: 5.2mph
The windiest months (with the highest average wind speed) are January, February, March and April (7.6mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Sunapee, NH
- Average humidity in September: 80%
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is April (75%).
Average rainfall in September
Sunapee, NH
- Average rainfall in September: 2.05"
The wettest month (with the highest rainfall) is October (3.39").
The driest month (with the least rainfall) is September (2.05").
Average rainfall days in September
Sunapee, NH
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is June (16.8 days).
The month with the least rainy days is February (7.9 days).
Average snowfall in September
Sunapee, NH
- Average snowfall in September: 0"
The month with the highest snowfall is February (11.18").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Sunapee, NH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (14.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sunapee, NH
- Average daylight in September: 12h and 30min
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 12min
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 0min).
Average sunshine days in September
Sunapee, NH
- Average sunshine days in September: 16.8 days
The month with the most sunshine days is September (16.8 days).
The month with the least sunshine days is February (11.3 days).
Average UV index in September
Sunapee, NH
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover in September
Sunapee, NH
- Average cloud cover in September: 40
The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in September
Sunapee, NH
- 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).
