Greenbelt Weather in September

September in Greenbelt sees daytime temperatures around 26°C (79°F) and lows of 15°C (59°F) at night. With around 100 mm (3.9 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in Greenbelt in September

Past climate data indicates that roughly 9 days will see rain, totalling around 100 mm (3.9 in) for the month. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.

Temperature in Greenbelt in September

Daytime temperatures in Greenbelt reach 26°C (79°F) in September, dropping to 15°C (59°F) at night. Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights cool down to 15°C (59°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Greenbelt in September

Expect a lot of sunshine this month, with about 225 hours of sun. These sunny conditions add to the overall experience.

Wind Speed in Greenbelt in September

In September, average wind speeds reach 4 m/s (8 knots), leading to light to moderate breezes. Conditions vary from day to day, with both calm and windier periods.

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

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 Greenbelt's climate page.

Greenbelt Temperature in September

Min Temperature 15°C (59°F)  

Max Temperature 26°C (79°F)  

Chance of Rain 30%  

Precipitation 100 mm (3.9 in)  

Rainy days 9 days  

Humidity 68% *  

Windspeed 4 m/s (8 knots) *  

Sunshine 225 hours *  

Percentage Sunshine 60% *  

* Data from: Washington DC, the United States of America (21 KM, 13 Miles).

What to Wear in Greenbelt in September

Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Greenbelt in September

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

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

8/10

Outdoor sports

7/10

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 Greenbelt's climate page.

More climate data for Greenbelt

Temperature Rainfall Sunshine Humidity Wind Speed

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