Updated October 2026
Fort Washington Park Weather by Month
Fort Washington Park is warmest in July, when the nearest NOAA climate station averages a high of 88°F and a low of 69°F, and coldest in January, with an average high of 44°F and an average low of 27°F. July is the wettest month, with about 5 inches of precipitation.
These figures are NOAA's 1991–2020 climate normals, the 30-year average for each calendar month, from the nearest long-record weather station, 6.1 miles from the park's reference point. A single station cannot describe a whole park: temperatures elsewhere in Fort Washington Park can differ from these, particularly with elevation.
Warmest month
Jul
88°F avg high
Coldest month
Jan
27°F avg low
Wettest month
Jul
5.0 in avg
Longest days
Jun
14.7 h of daylight
Average weather at Fort Washington by month
| Month | Avg high | Avg low | Precipitation | Daylight |
|---|---|---|---|---|
| January | 44°F | 27°F | 3.1 in | 9.6 h |
| February | 48°F | 28°F | 2.9 in | 10.5 h |
| March | 56°F | 35°F | 4.0 in | 11.7 h |
| April | 67°F | 45°F | 3.4 in | 13.0 h |
| May | 76°F | 55°F | 4.5 in | 14.1 h |
| June | 84°F | 64°F | 4.9 in | 14.7 h |
| July | 88°F | 69°F | 5.0 in | 14.5 h |
| August | 87°F | 67°F | 4.2 in | 13.5 h |
| September | 80°F | 61°F | 4.4 in | 12.2 h |
| October | 68°F | 48°F | 3.8 in | 11.0 h |
| November | 57°F | 39°F | 3.1 in | 9.8 h |
| December | 48°F | 31°F | 3.8 in | 9.3 h |
| Year total | 47.1 in |
NOAA 1991–2020 climate normals from station USC00186800, 6.1 miles from the park's reference point. Daylight is the monthly average, computed from the park's latitude. Each month links to how crowded Fort Washington is at that time of year.
Fort Washington weather by season
Winter: December to February
Average highs bottom out at 44°F in January, between 48°F in December and 48°F in February, with average lows between 27°F and 31°F. The average low is at or below freezing in all three months. Together the three months average 9.8 inches of precipitation, about 21% of the yearly total and less than in any other season. Daylight is at its shortest, about 9.3 hours in December.
Spring: March to May
Average highs climb from 56°F in March to 76°F in May, with average lows between 35°F and 55°F. Together the three months average 11.9 inches of precipitation, about 25% of the yearly total. Daylight lengthens from about 11.7 hours in March to 14.1 in May.
Summer: June to August
Average highs peak at 88°F in July, between 84°F in June and 87°F in August, with average lows between 64°F and 69°F. Together the three months average 14.1 inches of precipitation, about 30% of the yearly total and more than in any other season. Daylight is at its longest, about 14.7 hours in June.
Fall: September to November
Average highs fall from 80°F in September to 57°F in November, with average lows between 39°F and 61°F. Together the three months average 11.3 inches of precipitation, about 24% of the yearly total. Daylight shortens from about 12.2 hours in September to 9.8 in November.
What the National Park Service says about the weather
Summers are generally hot and humid, with daytime highs frequently above 90 degrees Fahrenheit and scattered afternoon thunderstorms. Please carry water while participating in physical activity and be prepared to take shelter from lightning. Winters are generally cold, with nighttime lows frequently near freezing and occasional snowfall. Weather during spring and fall is generally moderate, but can change quickly.
Weather description courtesy of the National Park Service — official park site.
Today's forecast for Fort Washington
Averages describe a typical month, not this week. For current conditions and the seven-day outlook, the National Weather Service issues a forecast for the park's reference point at 38.71°N, 77.03°W. It covers that one spot, so other elevations in the park can differ from it, as they do from the averages above.
National Weather Service forecast for Fort Washington Park →
Weather and crowds together
July is both the warmest month and the busiest, with about 1.5× the visitors of the park's average month. January is the quietest. To see those crowds set against the weather for all twelve months, read the best time to visit Fort Washington Park. For hotels, cabins and rentals close to the park, see where to stay near Fort Washington.
Where to stay near Fort Washington
Picked a month for Fort Washington Park? Compare hotels, cabins and vacation rentals near the park with live availability and prices.
Top-rated places to stay near Fort Washington
Prices for Oct 16–18, 4 adults. Change dates on the map below.
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Frequently Asked Questions
July is the warmest month at Fort Washington Park, with an average high of 88°F and an average low of 69°F. That is the 1991–2020 average at the nearest long-record NOAA station, 6.1 miles from the park's reference point. Temperatures inside the park can differ, particularly with elevation.
January is the coldest month at Fort Washington Park, with an average low of 27°F and an average high of 44°F, based on NOAA 1991–2020 climate normals.
July is the wettest month, with about 5 inches of precipitation. February is the driest, at about 2.9 inches. The station records about 47.1 inches of precipitation in an average year.
Daylight at Fort Washington Park runs from about 9.3 hours a day in December to about 14.7 hours in June, computed from the park's latitude.
Weather at nearby parks
2 mi away · warmest in July (88°F)
11 mi away · warmest in July (90°F)
12 mi away · warmest in July (90°F)
12 mi away · warmest in July (90°F)
12 mi away · warmest in July (90°F)
12 mi away · warmest in July (90°F)
Keep exploring
Sources: NOAA NCEI U.S. Climate Normals 1991–2020 (station USC00186800), daylight computed from latitude, weather description from the National Park Service, crowd levels from National Park Service Visitor Use Statistics (1979–2025). Updated 2026-10-11. Lodging results are provided by Stay22; WhenToVisitParks may earn a commission from bookings, at no extra cost to you.