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
With September's onset, the weather reveals a slight temperature decrease, transitioning from a hot 86.9°F (30.5°C) in August to a moderately hot 80.1°F (26.7°C). Keene's average low-temperature for the month of September records at a mild 59.4°F (15.2°C).Humidity
In September, the average relative humidity is 75%.Rainfall
The month with the least rainfall is September, when the rain falls for 11.5 days and typically collects 1.57" (40mm) of precipitation.Snowfall
In Keene, snow does not fall in May through October.Daylight
In September, the average length of the day in Keene is 12h and 25min.On the first day of the month, sunrise is at 6:44 am and sunset at 7:43 pm. On the last day of September, sunrise is at 7:09 am and sunset at 6:58 pm EDT.
Sunshine
The average sunshine in September is 8.7h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: During September, 5 as the daily maximum UV index converts into the following advice:
Take measures. Individuals with light skin might experience burns in under 30 minutes. It's recommended to limit sun exposure when its radiation is at its peak during midday. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
When it does not snow in Keene?
What is the average length of the day in September?
What time are sunrise and sunset in September in Keene?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Keene, VA
- Average high temperature in September: 80.1°F
The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is January (43°F).
- Average low temperature in September: 59.4°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (27.7°F).
Average pressure in September
Keene, VA
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Keene, VA
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in September
Keene, VA
- Average humidity in September: 75%
The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is July (69%).
Average rainfall in September
Keene, VA
- Average rainfall in September: 1.57"
The wettest month (with the highest rainfall) is April (2.76").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in September
Keene, VA
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is May (16.2 days).
The month with the least rainy days is January (8.6 days).
Average snowfall in September
Keene, VA
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.32").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Keene, VA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Keene, VA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in September
Keene, VA
- Average sunshine days in September: 17.1 days
The month with the most sunshine days is December (20.4 days).
The month with the least sunshine days is May (13.1 days).
Average UV index in September
Keene, VA
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, November and December (UV index 2).
Average cloud cover in September
Keene, VA
- Average cloud cover in September: 39
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in September
Keene, VA
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, June, July, August, October and November (6mi).
The months with the lowest visibility are May, September and December (5mi).
Keene, Virginia, USA
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