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 brings a minor shift in the average high-temperature, adjusting from a moderately hot 78.4°F (25.8°C) in August to a pleasant 71.1°F (21.7°C). In the month of September, the average low-temperature usually rests at a cool 51.4°F (10.8°C).Humidity
In September, the average relative humidity is 78%.Rainfall
The month with the least rainfall in Winchester is September, when the rain falls for 11.4 days and typically collects 1.81" (46mm) of precipitation.Snowfall
In Winchester, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 29min.On the first day of the month, sunrise is at 6:15 am and sunset at 7:23 pm. On the last day of September, sunrise is at 6:46 am and sunset at 6:32 pm EDT.
Sunshine
In September, the average sunshine in Winchester, New Hampshire, is 8.7h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. To cut down UV radiation exposure by about half, sport 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 Winchester?
What is the average humidity in September in Winchester?
What is the driest month in Winchester?
How much does it rain in Winchester in September?
When it does not snow in Winchester?
Does it snow in Winchester in September?
How many hours of daylight does Winchester have in September?
When are sunrise and sunset in September in Winchester?
How many hours of sunshine does Winchester have in September?
What is the UV index reading in September in Winchester?
Average temperature in September
Winchester, NH
- Average high temperature in September: 71.1°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (28.4°F).
- Average low temperature in September: 51.4°F
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure in September
Winchester, NH
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Winchester, NH
- Average wind speed in September: 5.4mph
The windiest months (with the highest average wind speed) are January, February and March (7.8mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Winchester, NH
- Average humidity in September: 78%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Winchester, NH
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is October (2.76").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in September
Winchester, NH
- Average rainfall days in September: 11.4 days
The month with the highest number of rainy days is June (15.2 days).
The month with the least rainy days is February (8.1 days).
Average snowfall in September
Winchester, NH
- Average snowfall in September: 0"
The month with the highest snowfall is February (7.44").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Winchester, NH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (10.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Winchester, NH
- Average daylight in September: 12h and 3min
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 4min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in September
Winchester, NH
- Average sunshine days in September: 15.4 days
The months with the most sunshine days are January and November (16.7 days).
The month with the least sunshine days is June (12.4 days).
Average UV index in September
Winchester, NH
- Average UV index in September: 4
The months with the highest UV index are May, 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
Winchester, NH
- Average cloud cover in September: 36
The months with the most cloud cover are February and March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
Winchester, NH
- Average visibility in September: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
Winchester, New Hampshire, USA
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