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
Twin Mountain's weather subtly changes with the onset of September, barely falling from a pleasant 72.9°F (22.7°C) in August to a comfortable 65.8°F (18.8°C). Twin Mountain's average low-temperature for the month of September records at a chilly 46°F (7.8°C).Humidity
In September, the average relative humidity is 81%.Rainfall
The month with the least rainfall is September, when the rain falls for 13.2 days and typically collects 2.24" (57mm) of precipitation.Snowfall
In Twin Mountain, New Hampshire, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 30min.On the first day of September, sunrise is at 6:10 am and sunset at 7:21 pm. On the last day of the month, sunrise is at 6:43 am and sunset at 6:28 pm EDT.
Sunshine
In September, the average sunshine is 7.8h.UV index
The average daily maximum UV index in September in Twin Mountain is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: A maximum daily UV index of 3 during September morphs into the following directions:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Frequently asked questions
What are the temperatures in Twin Mountain in September?
What is the average humidity in September in Twin Mountain?
What is the driest month in Twin Mountain?
How much does it rain in Twin Mountain in September?
When it does not snow in Twin Mountain?
Does it snow in Twin Mountain in September?
What is the average length of the day in September in Twin Mountain?
When is the sunrise / sunset in September in Twin Mountain?
How long on average sun shines in September in Twin Mountain?
How high is the UV index in September in Twin Mountain?
Average temperature in September
Twin Mountain, NH
- Average high temperature in September: 65.8°F
The warmest month (with the highest average high temperature) is July (74.1°F).
The month with the lowest average high temperature is January (21.9°F).
- Average low temperature in September: 46°F
The month with the highest average low temperature is July (54.1°F).
The coldest month (with the lowest average low temperature) is January (8.6°F).
Average pressure in September
Twin Mountain, 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
Twin Mountain, NH
- Average wind speed in September: 4.7mph
The windiest months (with the highest average wind speed) are January and February (6.9mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in September
Twin Mountain, NH
- Average humidity in September: 81%
The month with the highest relative humidity is February (90%).
The month with the lowest relative humidity is May (77%).
Average rainfall in September
Twin Mountain, NH
- Average rainfall in September: 2.24"
The wettest month (with the highest rainfall) is October (3.62").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days in September
Twin Mountain, NH
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is July (19.1 days).
The month with the least rainy days is February (5.2 days).
Average snowfall in September
Twin Mountain, NH
- Average snowfall in September: 0"
The month with the highest snowfall is February (17.44").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Twin Mountain, NH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (22.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Twin Mountain, NH
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 7h and 5min
The months with the most sunshine are July and August (Average sunshine: 9h and 18min).
The month with the least sunshine is February (Average sunshine: 2h and 42min).
Average sunshine days in September
Twin Mountain, NH
- Average sunshine days in September: 14.1 days
The month with the most sunshine days is September (14.1 days).
The month with the least sunshine days is February (5.8 days).
Average UV index in September
Twin Mountain, NH
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in September
Twin Mountain, NH
- Average cloud cover in September: 45
The month with the most cloud cover is February (Cloud cover 75).
The months with the least cloud cover are July and August (Cloud cover 43).
Average visibility in September
Twin Mountain, NH
- Average visibility in September: 4mi
The months with the highest visibility are May, June and July (5mi).
The months with the lowest visibility are January, February, March, April, August, September, October, November and December (4mi).
Twin Mountain, New Hampshire, USA
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