September weather forecastFitzwilliam, NH
September
Weather in September
September, the first month of the autumn in Fitzwilliam, is still a pleasant month, with an average temperature ranging between min 51.4°F (10.8°C) and max 69.8°F (21°C).Temperature
A subtle change in temperatures is noted as August gives way to September, with average highs reducing from a warm 77.5°F (25.3°C) to an agreeable 69.8°F (21°C). In Fitzwilliam, an average temperature of 51.4°F (10.8°C) is noted during September nights.Humidity
The average relative humidity in September in Fitzwilliam is 79%.Rainfall
The month with the least rainfall is September, when the rain falls for 13 days and typically collects 2.17" (55mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Fitzwilliam, the average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:14 am and sunset at 7:22 pm. On the last day of September, sunrise is at 6:45 am and sunset at 6:31 pm EDT.
Sunshine
In September, the average sunshine in Fitzwilliam is 8h.UV index
The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.Note: In September, the maximum UV index of 3 transforms into these recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Fitzwilliam, NH
- Average high temperature in September: 69.8°F
The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is January (28°F).
- Average low temperature in September: 51.4°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 (16.2°F).
Average pressure in September
Fitzwilliam, 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 (29.92"Hg).
Average wind speed in September
Fitzwilliam, NH
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is January (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
Fitzwilliam, NH
- Average humidity in September: 79%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is April (74%).
Average rainfall in September
Fitzwilliam, NH
- Average rainfall in September: 2.17"
The wettest month (with the highest rainfall) is October (3.35").
The driest month (with the least rainfall) is September (2.17").
Average rainfall days in September
Fitzwilliam, NH
- Average rainfall days in September: 13 days
The months with the highest number of rainy days are May, June and August (15.8 days).
The month with the least rainy days is February (7.2 days).
Average snowfall in September
Fitzwilliam, NH
- Average snowfall in September: 0"
The month with the highest snowfall is February (9.41").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Fitzwilliam, NH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (12.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Fitzwilliam, NH
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 8h and 0min
The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days in September
Fitzwilliam, NH
- Average sunshine days in September: 14.8 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is March (11.7 days).
Average UV index in September
Fitzwilliam, NH
- Average UV index in September: 3
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Fitzwilliam, NH
- Average cloud cover in September: 42
The months with the most cloud cover are February and March (Cloud cover 54).
The months with the least cloud cover are July and August (Cloud cover 38).
Average visibility in September
Fitzwilliam, NH
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
