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
September indicates a minor shift in the average high-temperature, from August's moderately hot 74.8°F (23.8°C) to a comfortable 67.6°F (19.8°C). Dundee records an average nighttime low of 47.3°F (8.5°C) in September.Humidity
In Dundee, New Hampshire, the average relative humidity in September is 80%.Rainfall
September is the month with the least rainfall. Rain falls for 6.6 days and accumulates 0.39" (10mm) of precipitation.Snowfall
In Dundee, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 30min.On the first day of the month, sunrise is at 6:08 am and sunset at 7:20 pm. On the last day of September, sunrise is at 6:41 am and sunset at 6:26 pm EDT.
Sunshine
In September, the average sunshine is 8.6h.UV index
In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: In September, the maximum UV index of 3 suggests these recommendations:
Put precautions into practice - Guidance to elude sunburn is provided. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather U.S. | About Us
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 Dundee have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Dundee have in September?
What is the UV index intensity in September?
Average temperature in September
Dundee, NH
- Average high temperature in September: 67.6°F
The warmest month (with the highest average high temperature) is July (76.3°F).
The month with the lowest average high temperature is January (24.3°F).
- Average low temperature in September: 47.3°F
The month with the highest average low temperature is July (55.4°F).
The coldest month (with the lowest average low temperature) is January (10.8°F).
Average pressure in September
Dundee, 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
Dundee, NH
- Average wind speed in September: 4.5mph
The windiest months (with the highest average wind speed) are January and February (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in September
Dundee, NH
- Average humidity in September: 80%
The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is May (77%).
Average rainfall in September
Dundee, NH
- Average rainfall in September: 0.39"
The wettest months (with the highest rainfall) are April and October (1.46").
The driest month (with the least rainfall) is September (0.39").
Average rainfall days in September
Dundee, NH
- Average rainfall days in September: 6.6 days
The months with the highest number of rainy days are May and July (10.3 days).
The month with the least rainy days is February (3.7 days).
Average snowfall in September
Dundee, NH
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.53").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Dundee, NH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (8.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Dundee, 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: 8h and 54min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in September
Dundee, NH
- Average sunshine days in September: 21.5 days
The month with the most sunshine days is January (22.6 days).
The month with the least sunshine days is June (18.2 days).
Average UV index in September
Dundee, 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 February and December (UV index 1).
Average cloud cover in September
Dundee, NH
- Average cloud cover in September: 39
The month with the most cloud cover is February (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in September
Dundee, NH
- Average visibility in September: 4mi
The months with the highest visibility are April, May, June, July, August, November and December (5mi).
The months with the lowest visibility are January, February, March, September and October (4mi).
Dundee, New Hampshire, USA
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