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 warm 77.9°F (25.5°C) in August to a pleasant 69.8°F (21°C). During the month of September, Belmont experiences a steady low-temperature average of 49.8°F (9.9°C).Humidity
The average relative humidity in September is 79%.Rainfall
The month with the least rainfall is September, when the rain falls for 10.9 days and typically collects 1.77" (45mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Belmont, the average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:10 am and sunset at 7:20 pm. On the last day of September, sunrise is at 6:43 am and sunset at 6:28 pm EDT.
Sunshine
In Belmont, the average sunshine in September is 8.1h.UV index
In Belmont, New Hampshire, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Minimize direct exposure to the Sun during midday when its radiation is at its peak. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Belmont have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September in Belmont?
What is the UV index intensity in September?
Average temperature in September
Belmont, 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 (26.6°F).
- Average low temperature in September: 49.8°F
The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in September
Belmont, NH
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Belmont, NH
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is January (7.2mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in September
Belmont, NH
- Average humidity in September: 79%
The months with the highest relative humidity are January and February (85%).
The month with the lowest relative humidity is April (74%).
Average rainfall in September
Belmont, NH
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is October (3.27").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in September
Belmont, NH
- Average rainfall days in September: 10.9 days
The month with the highest number of rainy days is April (14.4 days).
The month with the least rainy days is February (5.5 days).
Average snowfall in September
Belmont, NH
- Average snowfall in September: 0"
The month with the highest snowfall is February (10.63").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Belmont, NH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (12.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Belmont, NH
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 8h and 1min
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
Belmont, NH
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is September (17.5 days).
The month with the least sunshine days is March (12.8 days).
Average UV index in September
Belmont, NH
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in September
Belmont, NH
- Average cloud cover in September: 40
The month with the most cloud cover is March (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in September
Belmont, NH
- Average visibility in September: 4mi
The months with the highest visibility are January, March, April, May, June, July, August, October, November and December (5mi).
The months with the lowest visibility are February and September (4mi).
Belmont, New Hampshire, USA
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