Portsmouth weather in September (New Hampshire, United States of America)

Interested in knowing the climate of Portsmouth in September? Is now the perfect time to visit? Find all the weather insights for this month on this page.

Temperatures

For September, the weather in Portsmouth is generally perfect, featuring high temperatures and moderate rainfall. Expect temperatures to climb to 23°C during the day, with nighttime readings dropping to 12°C.

Precipitation

Portsmouth in September usually receives moderate rainfall, averaging around 96 mm for the month. Records from the past 30 years suggest that around 9 days will experience rain.

Average sunshine

The city usually sees around 214 hours of sunlight, indicating many sunny days.

If you're inclined towards comfortable temperatures and drier conditions, September is a prime time to visit Portsmouth. September typically offers the best circumstances. While January, February, March, April, November and December tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Portsmouth climate page with graphs.

 

Portsmouth, monthly averages in September

Min Temperature 12°C  

Max Temperature 23°C  

Chance of Rain 30%  

Precipitation 96 mm  

Rainy days 9 days  

Humidity 76% *  

Sunshine 214 hours *  

Percentage Sunshine *  

* Data from: Concord, the United States of America (64 KM, 40 Miles).

Where to go in the United States of America in September

Find out more about the weather in the United States of America and which places have the best travel conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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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).

So, what should you wear in this month?

For visitors traveling to Portsmouth, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling

9/10

Walking

9/10

Barbeque

8/10

Camping

8/10

Outdoor sports

9/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Portsmouth.

Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find 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.