Updated October 2026
Hamilton Grange National Memorial Weather by Month
Hamilton Grange National Memorial is warmest in July, when the nearest NOAA climate station averages a high of 85°F and a low of 70°F, and coldest in January, with an average high of 40°F and an average low of 28°F. July and August are the wettest months, with about 4.6 inches of precipitation each. Snowfall is heaviest in February, at about 10 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 miles from the park's reference point. A single station cannot describe a whole park: temperatures elsewhere in Hamilton Grange National Memorial can differ from these, particularly with elevation.
Warmest month
Jul
85°F avg high
Coldest month
Jan
28°F avg low
Snowiest month
Feb
10.1 in avg
Longest days
Jun
14.9 h of daylight
Average weather at Hamilton Grange by month
| Month | Avg high | Avg low | Precipitation | Snowfall | Daylight |
|---|---|---|---|---|---|
| January | 40°F | 28°F | 3.6 in | 8.8 in | 9.4 h |
| February | 42°F | 30°F | 3.2 in | 10.1 in | 10.4 h |
| March | 50°F | 36°F | 4.3 in | 5.0 in | 11.7 h |
| April | 62°F | 46°F | 4.1 in | 0.4 in | 13.1 h |
| May | 71°F | 55°F | 4.0 in | 0.0 in | 14.3 h |
| June | 80°F | 64°F | 4.5 in | 0.0 in | 14.9 h |
| July | 85°F | 70°F | 4.6 in | 0.0 in | 14.7 h |
| August | 83°F | 69°F | 4.6 in | 0.0 in | 13.6 h |
| September | 76°F | 62°F | 4.3 in | 0.0 in | 12.3 h |
| October | 65°F | 51°F | 4.4 in | 0.1 in | 10.9 h |
| November | 54°F | 42°F | 3.6 in | 0.5 in | 9.7 h |
| December | 44°F | 34°F | 4.4 in | 4.9 in | 9.1 h |
| Year total | 49.6 in | 29.8 in |
NOAA 1991–2020 climate normals from station USW00094728, 3 miles from the park's reference point. Daylight is the monthly average, computed from the park's latitude. Each month links to how crowded Hamilton Grange is at that time of year.
Hamilton Grange 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 28°F and 34°F. The average low is at or below freezing in January and February. Together the three months average 11.2 inches of precipitation, about 23% of the yearly total and less than in any other season. Snowfall averages about 24 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 71°F in May, with average lows between 36°F and 55°F. Together the three months average 12.4 inches of precipitation, about 25% of the yearly total. Snowfall averages about 5.4 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 85°F in July, between 80°F in June and 83°F in August, with average lows between 64°F and 70°F. Together the three months average 13.7 inches of precipitation, about 28% 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 76°F in September to 54°F in November, with average lows between 42°F and 62°F. Together the three months average 12.3 inches of precipitation, about 25% of the yearly total. Snowfall averages about 0.6 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
New York City has a temperate climate, and temperatures in northern Manhattan are frequently several degrees cooler than those in the southern part of the city.
Weather description courtesy of the National Park Service — official park site.
Today's forecast for Hamilton Grange
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 40.82°N, 73.95°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 Hamilton Grange National Memorial →
Weather and crowds together
July is both the warmest month and the busiest, with about 1.3× 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 Hamilton Grange National Memorial. For hotels, cabins and rentals close to the park, see where to stay near Hamilton Grange.
Where to stay near Hamilton Grange
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Top-rated places to stay near Hamilton Grange
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Frequently Asked Questions
July is the warmest month at Hamilton Grange National Memorial, with an average high of 85°F and an average low of 70°F. That is the 1991–2020 average at the nearest long-record NOAA station, 3 miles from the park's reference point. Temperatures inside the park can differ, particularly with elevation.
January is the coldest month at Hamilton Grange National Memorial, with an average low of 28°F and an average high of 40°F, based on NOAA 1991–2020 climate normals.
July and August are the wettest months, with about 4.6 inches of precipitation each. February is the driest, at about 3.2 inches. The station records about 49.6 inches of precipitation in an average year.
Yes. The nearest long-record NOAA station, 3 miles from the park's reference point, averages about 30 inches of snow a year. February is the snowiest month, at about 10 inches. The station averages at least a tenth of an inch of snow in 7 of the 12 months.
Weather at nearby parks
1 mi away · warmest in July (85°F)
6 mi away · warmest in July (85°F)
6 mi away · warmest in July (85°F)
8 mi away · warmest in July (85°F)
8 mi away · warmest in July (85°F)
8 mi away · warmest in July (86°F)
Keep exploring
Sources: NOAA NCEI U.S. Climate Normals 1991–2020 (station USW00094728), 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.