September weather forecastErrol, NH
September
Weather in September
The onset of autumn in September brings noticeable changes to Errol’s weather. The average high temperature lowers to 65.1°F (18.4°C), giving a clear sign of the changing season. With zero snowfall still, the city retains its inviting demeanor. The UV index starts declining, signaling the diminishing intensity of the sun. Moreover, the increasing percentage of cloud cover hints at the city's entry into a cooler season.Temperature
In September, the average high-temperature marginally drops from a pleasant 72°F (22.2°C) in August to a refreshing 65.1°F (18.4°C). The temperature dips to an average of 45.5°F (7.5°C) during September nights.Humidity
In September, the average relative humidity is 81%.Rainfall
In Errol, in September, during 12.6 rainfall days, 2.32" (59mm) of precipitation is typically accumulated. In Errol, during the entire year, the rain falls for 163.8 days and collects up to 29.69" (754mm) of precipitation.Snowfall
In Errol, snow does not fall in June through September.Daylight
In September, the average length of the day in Errol is 12h and 31min.On the first day of September, sunrise is at 6:07 am and sunset at 7:20 pm. On the last day of the month, sunrise is at 6:42 am and sunset at 6:26 pm EDT.
Sunshine
The average sunshine in September in Errol is 7.9h.UV index
In September, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 3 during September leads to these instructions:
Act with care - The need to guard against sun damage is communicated. Minimize direct exposure to the Sun during midday when its radiation is at its peak. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Errol, NH
- Average high temperature in September: 65.1°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 (21.2°F).
- Average low temperature in September: 45.5°F
The month with the highest average low temperature is July (53.4°F).
The coldest month (with the lowest average low temperature) is January (8.1°F).
Average pressure in September
Errol, NH
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.05"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Errol, NH
- Average wind speed in September: 5.2mph
The windiest months (with the highest average wind speed) are February, March and April (7.3mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in September
Errol, NH
- Average humidity in September: 81%
The months with the highest relative humidity are January and February (90%).
The month with the lowest relative humidity is May (77%).
Average rainfall in September
Errol, NH
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is October (3.15").
The driest month (with the least rainfall) is February (2.17").
Average rainfall days in September
Errol, NH
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is June (18.8 days).
The month with the least rainy days is February (7 days).
Average snowfall in September
Errol, NH
- Average snowfall in September: 0"
The month with the highest snowfall is February (13.66").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Errol, NH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (22.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Errol, NH
- Average daylight in September: 12h and 30min
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 54min
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 54min).
Average sunshine days in September
Errol, NH
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is February (4.9 days).
Average UV index in September
Errol, 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 February and December (UV index 1).
Average cloud cover in September
Errol, NH
- Average cloud cover in September: 45
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
Errol, NH
- Average visibility in September: 4mi
The months with the highest visibility are May and June (5mi).
The months with the lowest visibility are January, February, March, April, July, August, September, October, November and December (4mi).
