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
The arrival of September suggests a slight decrease in the average high-temperature, moving from a warm 77.7°F (25.4°C) in August to an agreeable 70.5°F (21.4°C). Peterborough records an average nighttime low of 52°F (11.1°C) in September.Humidity
In Peterborough, the average relative humidity in September is 79%.Rainfall
September is the month with the least rainfall in Peterborough. Rain falls for 10.1 days and accumulates 0.71" (18mm) of precipitation.Snowfall
In Peterborough, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:13 am and sunset at 7:21 pm. On the last day of September, in Peterborough, New Hampshire, sunrise is at 6:44 am and sunset at 6:30 pm EDT.
Sunshine
In Peterborough, the average sunshine in September is 8.1h.UV index
In Peterborough, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: A daily maximum UV index of 4 in September translates into the following instructions:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Peterborough in September?
What is the average humidity in September in Peterborough?
What is the driest month in Peterborough?
How many days does it rain in September in Peterborough?
When it does not snow in Peterborough?
Does it snow in Peterborough in September?
How many hours of daylight does Peterborough have in September?
What time are sunrise and sunset in September in Peterborough?
How many hours of sunshine does Peterborough have in September?
How high is the UV index in September in Peterborough?
Average temperature in September
Peterborough, NH
- Average high temperature in September: 70.5°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (28.6°F).
- Average low temperature in September: 52°F
The month with the highest average low temperature is July (60.3°F).
The coldest month (with the lowest average low temperature) is January (16°F).
Average pressure in September
Peterborough, 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
Peterborough, NH
- Average wind speed in September: 5.6mph
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
Peterborough, NH
- Average humidity in September: 79%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Peterborough, NH
- Average rainfall in September: 0.71"
The wettest month (with the highest rainfall) is July (1.34").
The driest month (with the least rainfall) is September (0.71").
Average rainfall days in September
Peterborough, NH
- Average rainfall days in September: 10.1 days
The month with the highest number of rainy days is May (13.5 days).
The month with the least rainy days is February (4.2 days).
Average snowfall in September
Peterborough, NH
- Average snowfall in September: 0"
The month with the highest snowfall is November (3.9").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Peterborough, NH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (9.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Peterborough, 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 1min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in September
Peterborough, NH
- Average sunshine days in September: 17.9 days
The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is June (14.3 days).
Average UV index in September
Peterborough, NH
- Average UV index in September: 4
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
Peterborough, NH
- Average cloud cover in September: 40
The month with the most cloud cover is March (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in September
Peterborough, NH
- Average visibility in September: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
Peterborough, New Hampshire, USA
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