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
Jaffrey's transition into September involves a gentle shift in temperature, receding from a moderately hot 77.5°F (25.3°C) in August to an agreeable 69.8°F (21°C). Jaffrey's temperature in September lowers to a consistent average of 51.4°F (10.8°C) during the nights.Humidity
In Jaffrey, the average relative humidity in September is 79%.Rainfall
September is the month with the least rainfall. Rain falls for 13 days and accumulates 2.17" (55mm) of precipitation.Snowfall
In Jaffrey, snow does not fall in June through September.Daylight
In Jaffrey, the average length of the day in September is 12h and 29min.On the first day of September in Jaffrey, sunrise is at 6:13 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 6:45 am and sunset at 6:30 pm EDT.
Sunshine
The average sunshine in September is 8h.UV index
In Jaffrey, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum daily UV index of 3 during September morphs into the following directions:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Jaffrey?
What is the average humidity in September in Jaffrey?
What is the driest month in Jaffrey?
How much does it rain in Jaffrey in September?
When it does not snow in Jaffrey?
Does it snow in Jaffrey in September?
How many hours of daylight does Jaffrey have in September?
What time are sunrise and sunset in September in Jaffrey?
How long on average sun shines in September in Jaffrey?
What is the UV index reading in September in Jaffrey?
Average temperature in September
Jaffrey, 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
Jaffrey, 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
Jaffrey, 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
Jaffrey, 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
Jaffrey, 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
Jaffrey, 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
Jaffrey, 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
Jaffrey, 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
Jaffrey, 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 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
Jaffrey, 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
Jaffrey, 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
Jaffrey, 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
Jaffrey, 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).
Jaffrey, New Hampshire, USA
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