Updated October 2026
Pennsylvania Avenue Weather by Month
Pennsylvania Avenue is warmest in July, when the nearest NOAA climate station averages a high of 90°F and a low of 71°F, and coldest in January, with an average high of 45°F and an average low of 28°F. June and July are the wettest months, with about 4.6 inches of precipitation each. Snowfall is heaviest in January, at about 4.7 inches.
These figures are NOAA's 1991–2020 climate normals, the 30-year average for each calendar month, from the nearest long-record weather station, 3.2 miles from the park's reference point. A single station cannot describe a whole park: temperatures elsewhere in Pennsylvania Avenue can differ from these, particularly with elevation.
Warmest month
Jul
90°F avg high
Coldest month
Jan
28°F avg low
Snowiest month
Jan
4.7 in avg
Longest days
Jun
14.7 h of daylight
Average weather at Pennsylvania Avenue by month
| Month | Avg high | Avg low | Precipitation | Snowfall | Daylight |
|---|---|---|---|---|---|
| January | 45°F | 28°F | 3.0 in | 4.7 in | 9.6 h |
| February | 48°F | 30°F | 2.8 in | 2.3 in | 10.5 h |
| March | 56°F | 37°F | 4.0 in | 1.4 in | 11.7 h |
| April | 68°F | 46°F | 3.4 in | 0.0 in | 13.0 h |
| May | 77°F | 57°F | 4.3 in | 0.0 in | 14.1 h |
| June | 85°F | 66°F | 4.6 in | 0.0 in | 14.7 h |
| July | 90°F | 71°F | 4.6 in | 0.0 in | 14.5 h |
| August | 88°F | 69°F | 3.7 in | 0.0 in | 13.5 h |
| September | 82°F | 62°F | 4.1 in | 0.0 in | 12.2 h |
| October | 70°F | 49°F | 4.2 in | 0.0 in | 11.0 h |
| November | 58°F | 39°F | 3.2 in | 0.0 in | 9.8 h |
| December | 49°F | 32°F | 3.7 in | 1.3 in | 9.3 h |
| Year total | 45.6 in | 9.7 in |
NOAA 1991–2020 climate normals from station USC00186350, 3.2 miles from the park's reference point. Daylight is the monthly average, computed from the park's latitude. Each month links to how crowded Pennsylvania Avenue is at that time of year.
Pennsylvania Avenue weather by season
Winter: December to February
Average highs bottom out at 45°F in January, between 49°F in December and 48°F in February, with average lows between 28°F and 32°F. The average low is at or below freezing in all three months. Together the three months average 9.5 inches of precipitation, about 21% of the yearly total and less than in any other season. Snowfall averages about 8.3 inches for the 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 77°F in May, with average lows between 37°F and 57°F. Together the three months average 11.7 inches of precipitation, about 26% of the yearly total. Snowfall averages about 1.4 inches for the season, most of it in March. Daylight lengthens from about 11.7 hours in March to 14.1 in May.
Summer: June to August
Average highs peak at 90°F in July, between 85°F in June and 88°F in August, with average lows between 66°F and 71°F. The average high is 90°F or hotter in July. Together the three months average 12.9 inches of precipitation, about 28% 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 82°F in September to 58°F in November, with average lows between 39°F and 62°F. Together the three months average 11.5 inches of precipitation, about 25% 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
Washington DC gets to see all four seasons. Humidity will make the temps feel hotter in summer and colder in winter. Spring (March - May) Temp: Average high is 65.5 degrees with a low of 46.5 degrees Summer (June - August) Temp: Average high is 86 degrees with a low of 68.5 degrees Fall (September - November) Temp: Average high is 68 degrees with a low of 51.5 degrees Winter (December - February) Temp: Average high is 45 degrees with a low of 30 degrees (Source: www.usclimatedata.com)
Weather description courtesy of the National Park Service — official park site.
Today's forecast for Pennsylvania Avenue
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 38.89°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.
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 Pennsylvania Avenue. For hotels, cabins and rentals close to the park, see where to stay near Pennsylvania Avenue.
Where to stay near Pennsylvania Avenue
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Top-rated places to stay near Pennsylvania Avenue
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Frequently Asked Questions
July is the warmest month at Pennsylvania Avenue, with an average high of 90°F and an average low of 71°F. That is the 1991–2020 average at the nearest long-record NOAA station, 3.2 miles from the park's reference point. Temperatures inside the park can differ, particularly with elevation.
January is the coldest month at Pennsylvania Avenue, with an average low of 28°F and an average high of 45°F, based on NOAA 1991–2020 climate normals.
June and July are the wettest months, with about 4.6 inches of precipitation each. February is the driest, at about 2.8 inches. The station records about 45.6 inches of precipitation in an average year.
Yes. The nearest long-record NOAA station, 3.2 miles from the park's reference point, averages about 9.7 inches of snow a year. January is the snowiest month, at about 4.7 inches. The station averages at least a tenth of an inch of snow in 4 of the 12 months.
Weather at nearby parks
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1 mi away · warmest in July (90°F)
1 mi away · warmest in July (90°F)
1 mi away · warmest in July (90°F)
Keep exploring
Sources: NOAA NCEI U.S. Climate Normals 1991–2020 (station USC00186350), daylight computed from latitude, weather description from the National Park Service, crowd levels from National Park Service Visitor Use Statistics (1986–2025). Updated 2026-10-11. Lodging results are provided by Stay22; WhenToVisitParks may earn a commission from bookings, at no extra cost to you.