Thinking about venturing to New Hampshire this September and curious about the weather conditions to expect? This page holds all the key information you seek, responding to your question:
What is the weather like in New Hampshire in September?
New Hampshire is a region in the United States of America. September in New Hampshire generally has temperatures that range from pleasant to warm, with precipitation levels ranging from moderate to high.
Temperatures
The average highest temperatures fluctuate between pleasant in Waterville Valley at 19°C to warm in Nashua at 24°C. Nighttime temperatures generally drop to 11°C in Nashua and 8°C in Waterville Valley.Precipitation
In September, precipitation varies across different areas. From moderate rainfall in West Lebanon with an average of 78 mm to high rainfall in West Chesterfield with 112 mm. Looking at the climate data spanning the last 30 years, this month usually has the lowest rainfall in Hampton Beach, marking it as the year's driest month.Average sunshine
The city Hampton Beach usually sees around 238 hours of sunlight, indicating many sunny days.To learn more about the conditions in specific areas of New Hampshire in September, check out the map below. For more details on the yearly weather, visit our New Hampshire climate page.
Where to go in New Hampshire in September
Find more information for the most popular destinations in the New Hampshire on the map below. Click on a destination dot for more detailes.
Weather conditions Weather
Temperatures
Precipitation
Map not visible? Whoops sorry! Please refresh the page.
Legend 
perfect weather 
pleasant 
tolerable 
unpleasant 
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).
Popular destinations
What is the weather like in September for the 5 most popular destinations in New Hampshire?
Hampton Beach
In September Hampton Beach generally has high temperatures with maximum daytime temperatures around 22°C, minimum nighttime temperatures around 12°C and moderate monthly rainfall. So on average the conditions are perfect that month.
Hampton Beach
Max temperature Max temp
Min temperature Min temp
Monthly sun hours Sun hours
Monthly rainfall Rainfall
Monthly rainy days Rainy days
Weather conditions Weather
<< August August
<<
26°C
15°C
280 hours
106 mm
10 days
pleasant
September September
22°C
12°C
238 hours
84 mm
10 days
perfect
October >> October
>>
16°C
6°C
207 hours
122 mm
14 days
unpleasant
Portsmouth
In September Portsmouth generally has high temperatures with maximum daytime temperatures around 23°C, minimum nighttime temperatures around 12°C and moderate monthly rainfall. So on average the conditions are perfect that month.
Portsmouth
Max temperature Max temp
Min temperature Min temp
Monthly sun hours Sun hours
Monthly rainfall Rainfall
Monthly rainy days Rainy days
Weather conditions Weather
<< August August
<<
26°C
16°C
261 hours
102 mm
10 days
pleasant
September September
23°C
12°C
214 hours
96 mm
9 days
perfect
October >> October
>>
16°C
6°C
183 hours
116 mm
13 days
unpleasant
Manchester
In September Manchester generally has high temperatures with maximum daytime temperatures around 24°C, minimum nighttime temperatures around 11°C and high monthly rainfall. So on average the conditions are pleasant that month.
Manchester
Max temperature Max temp
Min temperature Min temp
Monthly sun hours Sun hours
Monthly rainfall Rainfall
Monthly rainy days Rainy days
Weather conditions Weather
<< August August
<<
27°C
16°C
261 hours
106 mm
11 days
pleasant
September September
24°C
11°C
214 hours
100 mm
10 days
pleasant
October >> October
>>
16°C
5°C
183 hours
114 mm
12 days
unpleasant
Nashua
In September Nashua generally has high temperatures with maximum daytime temperatures around 24°C, minimum nighttime temperatures around 11°C and moderate monthly rainfall. So on average the conditions are perfect that month.
Nashua
Max temperature Max temp
Min temperature Min temp
Monthly sun hours Sun hours
Monthly rainfall Rainfall
Monthly rainy days Rainy days
Weather conditions Weather
<< August August
<<
28°C
16°C
261 hours
100 mm
11 days
pleasant
September September
24°C
11°C
214 hours
89 mm
10 days
perfect
October >> October
>>
17°C
5°C
183 hours
125 mm
13 days
unpleasant
Weirs Beach
In September Weirs Beach generally has high temperatures with maximum daytime temperatures around 22°C, minimum nighttime temperatures around 11°C and moderate monthly rainfall. So on average the conditions are perfect that month.
Weirs Beach
Max temperature Max temp
Min temperature Min temp
Monthly sun hours Sun hours
Monthly rainfall Rainfall
Monthly rainy days Rainy days
Weather conditions Weather
<< August August
<<
26°C
14°C
261 hours
109 mm
11 days
pleasant
September September
22°C
11°C
214 hours
96 mm
11 days
perfect
October >> October
>>
15°C
5°C
183 hours
133 mm
13 days
unpleasant
Is your destination not in the list? Have a look at other destinations in New Hampshire, in the United States of America.
Is September the best time to visit New Hampshire?
We consider September to be one of the best times to travel to New Hampshire. Typically, the climate in Hampton Beach is perfect. However, the weather conditions may vary depending on your destination.
On average, the best time to visit New Hampshire is in September with generally perfect weather in Hampton Beach. On the other hand, the months of January, February, March, April, November and December tend to have poor weather conditions.
Interested in more climate information?
We have much more information about the climate in New Hampshire. Interested in the weather conditions in a specific month? Select the month below.
Weather and climate has detailed information for every country in the world. Are you going to the United States of America? Get detailed historical weather averages for many cities in the United States of America.
Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.
