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 arrival of September signals a subtle shift in temperature, down from a moderately hot 75°F (23.9°C) in August to a refreshing 67.6°F (19.8°C). In September, Lower Bartlett records an average nighttime temperature of 47.5°F (8.6°C).Humidity
In September, the average relative humidity is 80%.Rainfall
September is the month with the least rainfall. Rain falls for 11.8 days and accumulates 1.69" (43mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Lower Bartlett, 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, in Lower Bartlett, New Hampshire, sunrise is at 6:41 am and sunset at 6:26 pm EDT.
Sunshine
In Lower Bartlett, the average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum UV index of 3 during September translates into these guidelines:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures 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 Lower Bartlett have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September in Lower Bartlett?
Average temperature in September
Lower Bartlett, NH
- Average high temperature in September: 67.6°F
The warmest month (with the highest average high temperature) is July (76.6°F).
The month with the lowest average high temperature is January (24.1°F).
- Average low temperature in September: 47.5°F
The month with the highest average low temperature is July (55.8°F).
The coldest month (with the lowest average low temperature) is January (10.8°F).
Average pressure in September
Lower Bartlett, 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
Lower Bartlett, NH
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is January (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in September
Lower Bartlett, NH
- Average humidity in September: 80%
The months with the highest relative humidity are January and February (87%).
The months with the lowest relative humidity are May and November (77%).
Average rainfall in September
Lower Bartlett, NH
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is April (3.7").
The driest month (with the least rainfall) is September (1.69").
Average rainfall days in September
Lower Bartlett, NH
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is February (10.8 days).
Average snowfall in September
Lower Bartlett, NH
- Average snowfall in September: 0"
The month with the highest snowfall is February (15.75").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Lower Bartlett, NH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (17.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Lower Bartlett, 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 3min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in September
Lower Bartlett, NH
- Average sunshine days in September: 15.4 days
The month with the most sunshine days is September (15.4 days).
The month with the least sunshine days is February (7.7 days).
Average UV index in September
Lower Bartlett, 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
Lower Bartlett, NH
- Average cloud cover in September: 39
The month with the most cloud cover is February (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in September
Lower Bartlett, NH
- Average visibility in September: 4mi
The months with the highest visibility are May, June, July, August, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April and September (4mi).
Lower Bartlett, New Hampshire, USA
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