Merrimack Weather in September

September is one of the perfect months to visit Merrimack, with daytime temperatures of 24°C (75°F) and lows of 11°C (52°F) at night. Do note that quite a bit of rainfall is typical, averaging around 92 mm (3.6 in).

Rainfall in Merrimack in September

Historically, the month has about 10 days of rain, averaging 92 mm (3.6 in) in total. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.

Temperature in Merrimack in September

September is one of the better months to visit Merrimack. Expect 24°C (75°F) during the day and 11°C (52°F) at night. Overall, the month follows a fairly predictable daily temperature pattern. With lows of 11°C (52°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in Merrimack in September

With approximately 214 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.

If your ideal day consists of dry skies and pleasant temperatures, May, July and September typically offer the best circumstances for Merrimack.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Merrimack's climate page.

Merrimack Temperature in September

Min Temperature 11°C (52°F)  

Max Temperature 24°C (75°F)  

Chance of Rain 32%  

Precipitation 92 mm (3.6 in)  

Rainy days 10 days  

Humidity 76% *  

Sunshine 214 hours *  

Percentage Sunshine *  

* Data from: Concord, the United States of America (38 KM, 23 Miles).

What to Wear in Merrimack in September

Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Merrimack in September

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

Swimming

9/10

Cycling

9/10

Walking

9/10

Barbeque

8/10

Camping

8/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Merrimack's climate page.

More climate data for Merrimack

Temperature Rainfall Sunshine Humidity

See the full Merrimack climate overview or explore weather in the United States of America.