Updated October 2026
Hopewell Furnace National Historic Site Weather by Month
Hopewell Furnace National Historic Site is warmest in July, when the nearest NOAA climate station averages a high of 85°F and a low of 64°F, and coldest in January, with an average high of 37°F and an average low of 21°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, 7 miles from the park's reference point. A single station cannot describe a whole park: temperatures elsewhere in Hopewell Furnace National Historic Site can differ from these, particularly with elevation.
Warmest month
Jul
85°F avg high
Coldest month
Jan
21°F avg low
Longest days
Jun
14.8 h of daylight
Average weather at Hopewell Furnace by month
| Month | Avg high | Avg low | Daylight |
|---|---|---|---|
| January | 37°F | 21°F | 9.4 h |
| February | 41°F | 22°F | 10.5 h |
| March | 49°F | 31°F | 11.7 h |
| April | 62°F | 39°F | 13.1 h |
| May | 72°F | 50°F | 14.2 h |
| June | 80°F | 59°F | 14.8 h |
| July | 85°F | 64°F | 14.6 h |
| August | 82°F | 62°F | 13.6 h |
| September | 76°F | 55°F | 12.3 h |
| October | 64°F | 44°F | 10.9 h |
| November | 53°F | 34°F | 9.7 h |
| December | 42°F | 27°F | 9.1 h |
NOAA 1991–2020 climate normals from station USC00364076, 7 miles from the park's reference point. Daylight is the monthly average, computed from the park's latitude. Each month links to how crowded Hopewell Furnace is at that time of year.
Hopewell Furnace weather by season
Winter: December to February
Average highs bottom out at 37°F in January, between 42°F in December and 41°F in February, with average lows between 21°F and 27°F. The average low is at or below freezing in all three months. Daylight is at its shortest, about 9.1 hours in December.
Spring: March to May
Average highs climb from 49°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. Daylight lengthens from about 11.7 hours in March to 14.2 in May.
Summer: June to August
Average highs peak at 85°F in July, between 80°F in June and 82°F in August, with average lows between 59°F and 64°F. Daylight is at its longest, about 14.8 hours in June.
Fall: September to November
Average highs fall from 76°F in September to 53°F in November, with average lows between 34°F and 55°F. Daylight shortens from about 12.3 hours in September to 9.7 in November.
What the National Park Service says about the weather
Summers are generally humid with daily temps. averaging 83 degrees (F) for a high and 60 degrees (F) for a low. Daily temps. in January average 38 degrees (F) for a high and 20 degrees (F) for a low. Precipitation averages 3-5 inches of rain per month during spring, summer and autumn. During winter conditions can be icy with snow accumulating up to several inches.
Weather description courtesy of the National Park Service — official park site.
Today's forecast for Hopewell Furnace
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 40.21°N, 75.77°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 Hopewell Furnace National Historic Site →
Weather and crowds together
July, the warmest month, sees about 1.5× the visitors of the park's average month. August 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 Hopewell Furnace National Historic Site. For hotels, cabins and rentals close to the park, see where to stay near Hopewell Furnace.
Where to stay near Hopewell Furnace
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Top-rated places to stay near Hopewell Furnace
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Frequently Asked Questions
July is the warmest month at Hopewell Furnace National Historic Site, with an average high of 85°F and an average low of 64°F. That is the 1991–2020 average at the nearest long-record NOAA station, 7 miles from the park's reference point. Temperatures inside the park can differ, particularly with elevation.
January is the coldest month at Hopewell Furnace National Historic Site, with an average low of 21°F and an average high of 37°F, based on NOAA 1991–2020 climate normals.
Daylight at Hopewell Furnace National Historic Site runs from about 9.1 hours a day in December to about 14.8 hours in June, computed from the park's latitude.
Weather at nearby parks
18 mi away · warmest in July (88°F)
28 mi away · warmest in July (84°F)
37 mi away · warmest in July (89°F)
37 mi away · warmest in July (89°F)
37 mi away · warmest in July (89°F)
38 mi away · warmest in July (84°F)
Keep exploring
Sources: NOAA NCEI U.S. Climate Normals 1991–2020 (station USC00364076), 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.