Updated October 2026
Morristown National Historical Park Weather by Month
Morristown National Historical Park is warmest in July, when the nearest NOAA climate station averages a high of 86°F and a low of 66°F, and coldest in January, with an average high of 40°F and an average low of 22°F. August is the wettest month, with about 4.9 inches of precipitation. Snowfall is heaviest in February, at about 8.4 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, 9.6 miles from the park's reference point. A single station cannot describe a whole park: temperatures elsewhere in Morristown National Historical Park can differ from these, particularly with elevation.
Warmest month
Jul
86°F avg high
Coldest month
Jan
22°F avg low
Wettest month
Aug
4.9 in avg
Snowiest month
Feb
8.4 in avg
Longest days
Jun
14.9 h of daylight
Average weather at Morristown by month
| Month | Avg high | Avg low | Precipitation | Snowfall | Daylight |
|---|---|---|---|---|---|
| January | 40°F | 22°F | 3.5 in | 5.8 in | 9.4 h |
| February | 42°F | 23°F | 3.0 in | 8.4 in | 10.4 h |
| March | 50°F | 31°F | 4.2 in | 4.6 in | 11.7 h |
| April | 62°F | 41°F | 4.0 in | 0.4 in | 13.1 h |
| May | 72°F | 50°F | 4.1 in | 0.0 in | 14.3 h |
| June | 82°F | 60°F | 4.8 in | 0.0 in | 14.9 h |
| July | 86°F | 66°F | 4.7 in | 0.0 in | 14.6 h |
| August | 85°F | 64°F | 4.9 in | 0.0 in | 13.6 h |
| September | 78°F | 56°F | 4.6 in | 0.0 in | 12.3 h |
| October | 66°F | 44°F | 4.6 in | 0.0 in | 10.9 h |
| November | 54°F | 35°F | 3.6 in | 0.7 in | 9.7 h |
| December | 44°F | 28°F | 4.4 in | 4.1 in | 9.1 h |
| Year total | 50.4 in | 24.0 in |
NOAA 1991–2020 climate normals from station USC00281335, 9.6 miles from the park's reference point. Daylight is the monthly average, computed from the park's latitude. Each month links to how crowded Morristown is at that time of year.
Morristown weather by season
Winter: December to February
Average highs bottom out at 40°F in January, between 44°F in December and 42°F in February, with average lows between 22°F and 28°F. The average low is at or below freezing in all three months. Together the three months average 10.9 inches of precipitation, about 22% of the yearly total and less than in any other season. Snowfall averages about 18 inches for the season. Daylight is at its shortest, about 9.1 hours in December.
Spring: March to May
Average highs climb from 50°F in March to 72°F in May, with average lows between 31°F and 50°F. The average low is at or below freezing in March. Together the three months average 12.3 inches of precipitation, about 24% of the yearly total. Snowfall averages about 5 inches for the season, most of it in March. Daylight lengthens from about 11.7 hours in March to 14.3 in May.
Summer: June to August
Average highs peak at 86°F in July, between 82°F in June and 85°F in August, with average lows between 60°F and 66°F. Together the three months average 14.4 inches of precipitation, about 29% of the yearly total and more than in any other season. Daylight is at its longest, about 14.9 hours in June.
Fall: September to November
Average highs fall from 78°F in September to 54°F in November, with average lows between 35°F and 56°F. Together the three months average 12.8 inches of precipitation, about 25% of the yearly total. Snowfall averages about 0.7 inches for the season. Daylight shortens from about 12.3 hours in September to 9.7 in November.
What the National Park Service says about the weather
Weather in this part of New Jersey is typical of the mid-Atlantic region--a humid continental climate with hot, humid summers and moderately cold winters.
Weather description courtesy of the National Park Service — official park site.
Today's forecast for Morristown
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 40.77°N, 74.53°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 Morristown National Historical 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 Morristown National Historical Park. For hotels, cabins and rentals close to the park, see where to stay near Morristown.
Where to stay near Morristown
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Top-rated places to stay near Morristown
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Frequently Asked Questions
July is the warmest month at Morristown National Historical Park, with an average high of 86°F and an average low of 66°F. That is the 1991–2020 average at the nearest long-record NOAA station, 9.6 miles from the park's reference point. Temperatures inside the park can differ, particularly with elevation.
January is the coldest month at Morristown National Historical Park, with an average low of 22°F and an average high of 40°F, based on NOAA 1991–2020 climate normals.
August is the wettest month, with about 4.9 inches of precipitation. February is the driest, at about 3 inches. The station records about 50.4 inches of precipitation in an average year.
Yes. The nearest long-record NOAA station, 9.6 miles from the park's reference point, averages about 24 inches of snow a year. February is the snowiest month, at about 8.4 inches. The station averages at least a tenth of an inch of snow in 6 of the 12 months.
Weather at nearby parks
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28 mi away · warmest in July (85°F)
28 mi away · warmest in July (85°F)
Keep exploring
Sources: NOAA NCEI U.S. Climate Normals 1991–2020 (station USC00281335), 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.