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 onset of September is marked by a minor decrease in temperature, transitioning from a moderately hot 78.1°F (25.6°C) in August to an agreeable 70°F (21.1°C). Throughout September, Keene anticipates an average low-temperature of 50.9°F (10.5°C).Humidity
In Keene, the average relative humidity in September is 79%.Rainfall
In Keene, in September, it is raining for 9.3 days, with typically 0.79" (20mm) of accumulated precipitation. Throughout the year, there are 125.1 rainfall days, and 11.69" (297mm) of precipitation is accumulated.Snowfall
In Keene, New Hampshire, snow does not fall in June through September.Daylight
In Keene, the average length of the day in September is 12h and 29min.On the first day of September in Keene, sunrise is at 6:14 am and sunset at 7:23 pm. On the last day of the month, sunrise is at 6:46 am and sunset at 6:31 pm EDT.
Sunshine
In Keene, the average sunshine in September is 8.5h.UV index
In Keene, New Hampshire, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Frequently asked questions
What is the usual temperature for Keene in September?
What is the average humidity in September in Keene?
How much does it rain in Keene in September?
When it does not snow in Keene?
Does it snow in Keene in September?
How many hours of daylight does Keene have in September?
What time are sunrise and sunset in September in Keene?
How many hours of sunshine does Keene have in September?
What is the UV index intensity in September in Keene?
Average temperature in September
Keene, NH
- Average high temperature in September: 70°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in September: 50.9°F
The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).
Average pressure in September
Keene, 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
Keene, NH
- Average wind speed in September: 5.4mph
The windiest months (with the highest average wind speed) are January, February and March (7.9mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in September
Keene, 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
Keene, NH
- Average rainfall in September: 0.79"
The wettest month (with the highest rainfall) is July (1.3").
The driest month (with the least rainfall) is March (0.75").
Average rainfall days in September
Keene, NH
- Average rainfall days in September: 9.3 days
The month with the highest number of rainy days is May (14.6 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in September
Keene, NH
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.64").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Keene, NH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (9.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Keene, 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 3min
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
Keene, NH
- Average sunshine days in September: 17.2 days
The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is May (13.8 days).
Average UV index in September
Keene, 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
Keene, NH
- Average cloud cover in September: 38
The months with the most cloud cover are February and March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Keene, 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).
Keene, New Hampshire, USA
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