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
During the shift to September, Walpole records a mild decrease in average high-temperature, moving from a moderately hot 77.9°F (25.5°C) in August to an agreeable 70.5°F (21.4°C). Nighttime temperature experiences an average drop to a fresh 50.4°F (10.2°C) in September.Humidity
In September, the average relative humidity in Walpole, New Hampshire, is 78%.Rainfall
In Walpole, in September, during 9.5 rainfall days, 1.34" (34mm) of precipitation is typically accumulated. Throughout the year, there are 113.5 rainfall days, and 16.77" (426mm) of precipitation is accumulated.Snowfall
In Walpole, 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 September in Walpole, sunrise is at 6:14 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 6:46 am and sunset at 6:32 pm EDT.
Sunshine
In September, the average sunshine is 8.6h.UV index
In Walpole, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: During September, 4 as the daily maximum UV index converts into the following advice:
Put precautions into practice - Protective measures against sun-induced damage are advised. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Frequently asked questions
What is the average September temperature in Walpole?
What is the average humidity in September in Walpole?
How much does it rain in Walpole in September?
When it does not snow in Walpole?
Does it snow in Walpole in September?
What is the average length of the day in September in Walpole?
When are sunrise and sunset in September in Walpole?
How long on average sun shines in September in Walpole?
What is the UV index intensity in September in Walpole?
Average temperature in September
Walpole, NH
- Average high temperature in September: 70.5°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (27.5°F).
- Average low temperature in September: 50.4°F
The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is January (14.5°F).
Average pressure in September
Walpole, NH
- Average pressure in September: 30.05"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
Walpole, NH
- Average wind speed in September: 5.3mph
The windiest months (with the highest average wind speed) are January, February and March (7.6mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Walpole, NH
- Average humidity in September: 78%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is April (74%).
Average rainfall in September
Walpole, NH
- Average rainfall in September: 1.34"
The wettest month (with the highest rainfall) is October (1.77").
The driest months (with the least rainfall) are January and March (1.06").
Average rainfall days in September
Walpole, NH
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is July (12.1 days).
The month with the least rainy days is January (4.5 days).
Average snowfall in September
Walpole, NH
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.69").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Walpole, NH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (7.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Walpole, 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 18min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in September
Walpole, NH
- Average sunshine days in September: 18.2 days
The month with the most sunshine days is November (20.5 days).
The months with the least sunshine days are April and June (16 days).
Average UV index in September
Walpole, 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
Walpole, NH
- Average cloud cover in September: 37
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in September
Walpole, 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).
Walpole, New Hampshire, USA
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