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's onset brings a negligible change in high-temperatures, falling from a moderately hot 78.3°F (25.7°C) in August to an agreeable 70.7°F (21.5°C). Stratham experiences an average nighttime temperature of 55.2°F (12.9°C) in the month of September.Humidity
In September, the average relative humidity in Stratham is 78%.Rainfall
September is the month with the least rainfall in Stratham. Rain falls for 5.3 days and accumulates 0.2" (5mm) of precipitation.Snowfall
In Stratham, snow does not fall in May through October.Daylight
The average length of the day in September in Stratham, New Hampshire, is 12h and 29min.On the first day of the month, sunrise is at 6:08 am and sunset at 7:18 pm. On the last day of September, in Stratham, sunrise is at 6:40 am and sunset at 6:26 pm EDT.
Sunshine
In September, the average sunshine in Stratham is 8.3h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the UV index of 4 transforms into the following advice:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Stratham?
What is the average humidity in September in Stratham?
What is the driest month in Stratham?
How much does it rain in Stratham in September?
When it does not snow in Stratham?
How many hours of daylight does Stratham have in September?
What time are sunrise and sunset in September in Stratham?
How many hours of sunshine does Stratham have in September?
What is the UV index intensity in September in Stratham?
Average temperature in September
Stratham, NH
- Average high temperature in September: 70.7°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (31.8°F).
- Average low temperature in September: 55.2°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in September
Stratham, 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 (29.92"Hg).
Average wind speed in September
Stratham, NH
- Average wind speed in September: 6.7mph
The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in September
Stratham, NH
- Average humidity in September: 78%
The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Stratham, NH
- Average rainfall in September: 0.2"
The wettest month (with the highest rainfall) is November (0.63").
The driest month (with the least rainfall) is September (0.2").
Average rainfall days in September
Stratham, NH
- Average rainfall days in September: 5.3 days
The month with the highest number of rainy days is July (8.1 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in September
Stratham, NH
- Average snowfall in September: 0"
The month with the highest snowfall is December (0.75").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Stratham, NH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Stratham, 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 2min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in September
Stratham, NH
- Average sunshine days in September: 23.4 days
The month with the most sunshine days is December (24.5 days).
The month with the least sunshine days is July (19.8 days).
Average UV index in September
Stratham, NH
- Average UV index in September: 4
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Stratham, NH
- Average cloud cover in September: 35
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Stratham, NH
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Stratham, New Hampshire, USA
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