Greenbelt Park in September
September at Greenbelt Park averages a daytime high near 79°F and an overnight low around 59°F, with about 4.4" of precipitation. Visitation runs about 0.8× the park's average month, which makes September a quiet month here.
- Average low
- 59°F
- Average high
- 79°F
Range across the year: 25°F to 87°F
- Precipitation
- 4.4 in
- Daylight
- 12.2 hours
Roughly 6% of the park's yearly visitors come in September: roughly 6,300 recreation visits in a typical year, based on National Park Service monthly counts from 1979 to 2025.
That makes September the 8th-busiest of the park's twelve months, sitting between the May peak (1.8×) and the January low (0.4×).
September is our recommended month at Greenbelt: pleasant weather with noticeably thinner crowds (shoulder season).
The daily average of about 69°F is a comfortable range for hiking and being outdoors all day. These figures are 1991–2020 NOAA climate normals from the nearest station, about 3.7 miles from the park.
Because June, July and August together draw about 36% of annual visitors, choosing September instead steps outside that summer crush — the single biggest lever on how crowded the park feels.
You'll have about 12.2 hours of daylight in September to explore — between the 9.3-hour midwinter low and the 14.7-hour summer high.
Park-wide, 2025 drew 130,314 recreation visits, up 67.8% from 77,642 in 2024.
Across the past decade overall visitation has eased about 44%, so September may feel a touch quieter than it once did.
How September compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| August | 86°F / 66°F | 1.3× Busy | 52 Fair |
| September | 79°F / 59°F | 0.8× Quiet | 73 Good |
| October | 68°F / 47°F | 0.9× Average | 57 Fair |
All twelve months at Greenbelt, with the best time to visit.
Things to do at Greenbelt in September
The National Park Service tags 9 Greenbelt activities for fall. Here are 8 of them. Each links to the park's own page for it.
- Spring and Fall Campfire programs · 45 minutes
- Azalea Trail 1.2 miles · 30-60 minutes
- Camping in Greenbelt Park, Maryland · reservation required
- Collect all the National Capital Parks - East Passport Stamps · 5-10 minutes
- Experience an Urban Oasis at Greenbelt Park · 1-2 days · reservation required
- Green Line - DC Metro · 1-2 days
- Junior Ranger Programs at National Capital Parks - East · 30-90 minutes
- Perimeter Trail 5.2 miles · 60-120 minutes
Frequently Asked Questions
September averages a daytime high near 79°F and an overnight low around 59°F at Greenbelt Park, with about 4.4 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 3.7 miles from the park, so conditions inside the park can differ, especially at other elevations.
September is quiet at Greenbelt Park (about 0.8× the average month). Our best-time score rates it "Good" at 73/100. September is our recommended month for this park.
The busiest month is May and the quietest is January. September sits at about 0.8× the park's average, or 6% of annual visitation.
A typical September sees about 6,000 recreation visits at Greenbelt Park, based on National Park Service monthly counts from 1979–2025.
Where to stay near Greenbelt in September
Booking a September trip to Greenbelt Park? Compare hotels, cabins and vacation rentals near the park with live September availability and prices.
Top-rated places to stay near Greenbelt
Prices for Oct 30–Nov 1, 4 adults. Change dates on the map below.
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See the full ranking of the best national parks to visit in September.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-10-11.