September weather forecastTripoli Mill, NH
September
Weather in September
September, the first month of the autumn in Tripoli Mill, is still a comfortable month, with an average temperature varying between 65.8°F (18.8°C) and 46.6°F (8.1°C).Temperature
The advent of September brings a slight shift in average high-temperature, moving from an agreeable 73°F (22.8°C) in August to an enjoyable 65.8°F (18.8°C). Tripoli Mill observes an average nighttime low-temperature of 46.6°F (8.1°C) during the month of September.Humidity
In September, the average relative humidity in Tripoli Mill is 81%.Rainfall
The month with the least rainfall is September, when the rain falls for 10 days and typically collects 0.79" (20mm) of precipitation.Snowfall
In Tripoli Mill, 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
The average sunshine in September is 7.6h.UV index
In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: The daily maximum UV index of 3 in September interprets into the following advice:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Tripoli Mill, NH
- Average high temperature in September: 65.8°F
The warmest month (with the highest average high temperature) is July (75°F).
The month with the lowest average high temperature is January (22.5°F).
- Average low temperature in September: 46.6°F
The month with the highest average low temperature is July (54.3°F).
The coldest month (with the lowest average low temperature) is January (9.7°F).
Average pressure in September
Tripoli Mill, 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
Tripoli Mill, 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
Tripoli Mill, NH
- Average humidity in September: 81%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is May (78%).
Average rainfall in September
Tripoli Mill, NH
- Average rainfall in September: 0.79"
The wettest month (with the highest rainfall) is April (1.5").
The driest month (with the least rainfall) is September (0.79").
Average rainfall days in September
Tripoli Mill, NH
- Average rainfall days in September: 10 days
The month with the highest number of rainy days is July (15.5 days).
The months with the least rainy days are January and February (5.3 days).
Average snowfall in September
Tripoli Mill, NH
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.45").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Tripoli Mill, NH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (18.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Tripoli Mill, NH
- Average daylight in September: 12h and 30min
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: 7h and 36min
The month with the most sunshine is August (Average sunshine: 9h and 18min).
The month with the least sunshine is February (Average sunshine: 2h and 54min).
Average sunshine days in September
Tripoli Mill, NH
- Average sunshine days in September: 16.6 days
The month with the most sunshine days is September (16.6 days).
The month with the least sunshine days is February (10.2 days).
Average UV index in September
Tripoli Mill, NH
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in September
Tripoli Mill, NH
- Average cloud cover in September: 48
The month with the most cloud cover is February (Cloud cover 72).
The month with the least cloud cover is July (Cloud cover 44).
Average visibility in September
Tripoli Mill, NH
- Average visibility in September: 4mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
