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
With the commencement of September, Marlborough records a moderate temperature decline, with the average high easing from August's moderately hot 78.1°F (25.6°C) to a pleasant 70°F (21.1°C). Marlborough, during the month of September, experiences an average low-temperature of 50.9°F (10.5°C).Humidity
In Marlborough, the average relative humidity in September is 79%.Rainfall
In September, in Marlborough, the rain falls for 9.3 days. Throughout September, 0.79" (20mm) of precipitation is accumulated. In Marlborough, during the entire year, the rain falls for 125.1 days and collects up to 11.69" (297mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September in Marlborough is 12h and 29min.On the first day of September in Marlborough, sunrise is at 6:14 am and sunset at 7:23 pm. On the last day of the month, sunrise is at 6:45 am and sunset at 6:31 pm EDT.
Sunshine
The average sunshine in September in Marlborough is 8.5h.UV index
In Marlborough, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The maximum UV index of 4 during September translates into these guidelines:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Frequently asked questions
What are the temperatures in Marlborough in September?
What is the average humidity in September in Marlborough?
How much does it rain in Marlborough in September?
When it does not snow in Marlborough?
Does it snow in Marlborough in September?
How many hours of daylight does Marlborough have in September?
What time are sunrise and sunset in September in Marlborough?
How many hours of sunshine does Marlborough have in September?
How high is the UV index in September in Marlborough?
Average temperature in September
Marlborough, NH
- Average high temperature in September: 70°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in September: 50.9°F
The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).
Average pressure in September
Marlborough, NH
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Marlborough, NH
- Average wind speed in September: 5.4mph
The windiest months (with the highest average wind speed) are January, February and March (7.9mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in September
Marlborough, NH
- Average humidity in September: 79%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is April (74%).
Average rainfall in September
Marlborough, NH
- Average rainfall in September: 0.79"
The wettest month (with the highest rainfall) is July (1.3").
The driest month (with the least rainfall) is March (0.75").
Average rainfall days in September
Marlborough, NH
- Average rainfall days in September: 9.3 days
The month with the highest number of rainy days is May (14.6 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in September
Marlborough, NH
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.64").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Marlborough, NH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (9.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Marlborough, NH
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in September
Marlborough, NH
- Average sunshine days in September: 17.2 days
The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is May (13.8 days).
Average UV index in September
Marlborough, NH
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Marlborough, NH
- Average cloud cover in September: 38
The months with the most cloud cover are February and March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Marlborough, NH
- Average visibility in September: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
Marlborough, New Hampshire, USA
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