Chatham Weather in September

With daytime temperatures of 22°C (72°F) and nighttime lows of 15°C (59°F), September in Chatham brings pleasant temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 82 mm (3.2 in) falls on average.

Rainfall in Chatham in September

Based on our climate data of the past 30 years, about 8 days of rain are anticipated, with 82 mm (3.2 in) on average. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in Chatham in September

Chatham in September has perfect weather. Days reach 22°C (72°F) and nights cool to 15°C (59°F). Summer occurs in September. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. At 15°C (59°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in Chatham in September

The days are predominantly sunny, with an estimated total of around 231 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Chatham.

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 Chatham's climate page.

Chatham Temperature in September

Min Temperature 15°C (59°F)  

Max Temperature 22°C (72°F)  

Chance of Rain 25%  

Precipitation 82 mm (3.2 in)  

Rainy days 8 days  

Sunshine 231 hours *  

Percentage Sunshine *  

* Data from: Nantucket, the United States of America (45 KM, 28 Miles).

What to Wear in Chatham in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Chatham in September

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

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 Chatham's climate page.

More climate data for Chatham

Temperature Rainfall Sunshine

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