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
A modest decline in the average high-temperature is seen during September, decreasing from a warm 79.3°F (26.3°C) in August to a pleasant 71.8°F (22.1°C). In Mont Vernon, the expected average low-temperature for September is a cool 52.5°F (11.4°C).Humidity
The average relative humidity in September is 78%.Rainfall
September is the month with the least rainfall. Rain falls for 11.4 days and accumulates 1.61" (41mm) of precipitation.Snowfall
June through September are months without snowfall in Mont Vernon.Daylight
In September, the average length of the day in Mont Vernon is 12h and 29min.On the first day of the month, sunrise is at 6:12 am and sunset at 7:20 pm. On the last day of September, in Mont Vernon, sunrise is at 6:43 am and sunset at 6:29 pm EDT.
Sunshine
In Mont Vernon, the average sunshine in September is 8.4h.UV index
In September, the average daily maximum UV index in Mont Vernon, New Hampshire, is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 4 in September interprets into the following recommendations:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Frequently asked questions
What are the temperatures in Mont Vernon in September?
What is the average humidity in September in Mont Vernon?
What is the driest month in Mont Vernon?
How much does it rain in Mont Vernon in September?
When it does not snow in Mont Vernon?
Does it snow in Mont Vernon in September?
What is the average length of the day in September in Mont Vernon?
When is the sunrise / sunset in September in Mont Vernon?
How long on average sun shines in September in Mont Vernon?
What is the UV index intensity in September in Mont Vernon?
Average temperature in September
Mont Vernon, NH
- Average high temperature in September: 71.8°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in September: 52.5°F
The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in September
Mont Vernon, 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
Mont Vernon, NH
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity in September
Mont Vernon, NH
- Average humidity in September: 78%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (72%).
Average rainfall in September
Mont Vernon, NH
- Average rainfall in September: 1.61"
The wettest month (with the highest rainfall) is October (3.03").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days in September
Mont Vernon, NH
- Average rainfall days in September: 11.4 days
The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is January (6.9 days).
Average snowfall in September
Mont Vernon, NH
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.42").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Mont Vernon, 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
Mont Vernon, 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 2min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in September
Mont Vernon, NH
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is April (13.2 days).
Average UV index in September
Mont Vernon, NH
- Average UV index in September: 4
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Mont Vernon, NH
- Average cloud cover in September: 38
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
Mont Vernon, 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).
Mont Vernon, New Hampshire, USA
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