Updated October 2026
Manassas National Battlefield Park Weather by Month
Manassas National Battlefield 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 42°F and an average low of 24°F.
These figures are NOAA's 1991–2020 climate normals, the 30-year average for each calendar month, from the nearest long-record weather station, 6.2 miles from the park's reference point. A single station cannot describe a whole park: temperatures elsewhere in Manassas National Battlefield Park can differ from these, particularly with elevation.
Warmest month
Jul
88°F avg high
Coldest month
Jan
24°F avg low
Longest days
Jun
14.7 h of daylight
Average weather at Manassas by month
| Month | Avg high | Avg low | Daylight |
|---|---|---|---|
| January | 42°F | 24°F | 9.6 h |
| February | 46°F | 26°F | 10.5 h |
| March | 54°F | 32°F | 11.7 h |
| April | 66°F | 43°F | 13.0 h |
| May | 74°F | 54°F | 14.1 h |
| June | 83°F | 64°F | 14.7 h |
| July | 88°F | 69°F | 14.5 h |
| August | 85°F | 67°F | 13.5 h |
| September | 78°F | 58°F | 12.2 h |
| October | 67°F | 46°F | 11.0 h |
| November | 56°F | 35°F | 9.8 h |
| December | 47°F | 29°F | 9.3 h |
NOAA 1991–2020 climate normals from station USC00445204, 6.2 miles from the park's reference point. Daylight is the monthly average, computed from the park's latitude. Each month links to how crowded Manassas is at that time of year.
Manassas weather by season
Winter: December to February
Average highs bottom out at 42°F in January, between 47°F in December and 46°F in February, with average lows between 24°F and 29°F. The average low is at or below freezing in all three months. Daylight is at its shortest, about 9.3 hours in December.
Spring: March to May
Average highs climb from 54°F in March to 74°F in May, with average lows between 32°F and 54°F. The average low is at or below freezing in March. 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 83°F in June and 85°F in August, with average lows between 64°F and 69°F. Daylight is at its longest, about 14.7 hours in June.
Fall: September to November
Average highs fall from 78°F in September to 56°F in November, with average lows between 35°F and 58°F. Daylight shortens from about 12.2 hours in September to 9.8 in November.
What the National Park Service says about the weather
Spring: Mild weather, with average low/high temperatures from 33 F to 75 F. Variable rainfall, with May being the wettest month of the year on average. Summer: Warm and humid weather, with average temperatures from 61 F to 88 F. Variable rainfall, with occasional downpours during storms. Fall: Mild weather, with average temperatures from 35 F to 79 F. Variable rainfall. Winter: Mild to cool weather, with average temperatures from 24 F to 47 F. Annual snowfall averages about 22 inches.
Weather description courtesy of the National Park Service — official park site.
Today's forecast for Manassas
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 38.82°N, 77.54°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 Manassas National Battlefield Park →
Weather and crowds together
July, the warmest month, sees about 1.3× the visitors of the park's average month. April is the busiest month of the year and January the quietest. To see those crowds set against the weather for all twelve months, read the best time to visit Manassas National Battlefield Park. For hotels, cabins and rentals close to the park, see where to stay near Manassas.
Where to stay near Manassas
Picked a month for Manassas National Battlefield Park? Compare hotels, cabins and vacation rentals near the park with live availability and prices.
Top-rated places to stay near Manassas
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 Manassas National Battlefield 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, 6.2 miles from the park's reference point. Temperatures inside the park can differ, particularly with elevation.
January is the coldest month at Manassas National Battlefield Park, with an average low of 24°F and an average high of 42°F, based on NOAA 1991–2020 climate normals.
Daylight at Manassas National Battlefield 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
17 mi away · warmest in July (84°F)
18 mi away · warmest in July (88°F)
20 mi away · warmest in July (84°F)
23 mi away · warmest in July (88°F)
24 mi away · warmest in July (88°F)
25 mi away · warmest in July (90°F)
Keep exploring
Sources: NOAA NCEI U.S. Climate Normals 1991–2020 (station USC00445204), 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.