Updated October 2026
Allegheny Portage Railroad National Historic Site Weather by Month
Allegheny Portage Railroad National Historic Site is warmest in July, when the nearest NOAA climate station averages a high of 81°F and a low of 61°F, and coldest in January, with an average high of 34°F and an average low of 19°F. May is the wettest month, with about 4.4 inches of precipitation. Snowfall is heaviest in February, at about 11 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, 7.2 miles from the park's reference point. A single station cannot describe a whole park: temperatures elsewhere in Allegheny Portage Railroad National Historic Site can differ from these, particularly with elevation.
Warmest month
Jul
81°F avg high
Coldest month
Jan
19°F avg low
Wettest month
May
4.4 in avg
Snowiest month
Feb
11.0 in avg
Longest days
Jun
14.9 h of daylight
Average weather at Allegheny Portage Railroad by month
| Month | Avg high | Avg low | Precipitation | Snowfall | Daylight |
|---|---|---|---|---|---|
| January | 34°F | 19°F | 2.9 in | 10.1 in | 9.4 h |
| February | 37°F | 20°F | 2.7 in | 11.0 in | 10.5 h |
| March | 46°F | 28°F | 3.5 in | 7.6 in | 11.7 h |
| April | 60°F | 39°F | 3.8 in | 0.6 in | 13.1 h |
| May | 70°F | 49°F | 4.4 in | 0.0 in | 14.2 h |
| June | 77°F | 57°F | 4.2 in | 0.0 in | 14.9 h |
| July | 81°F | 61°F | 4.2 in | 0.0 in | 14.6 h |
| August | 80°F | 60°F | 3.9 in | 0.0 in | 13.6 h |
| September | 73°F | 53°F | 4.3 in | 0.0 in | 12.3 h |
| October | 61°F | 42°F | 3.8 in | 0.0 in | 10.9 h |
| November | 49°F | 33°F | 3.6 in | 1.2 in | 9.7 h |
| December | 38°F | 24°F | 3.4 in | 7.6 in | 9.1 h |
| Year total | 44.7 in | 38.1 in |
NOAA 1991–2020 climate normals from station USC00360140, 7.2 miles from the park's reference point. Daylight is the monthly average, computed from the park's latitude. Each month links to how crowded Allegheny Portage Railroad is at that time of year.
Allegheny Portage Railroad weather by season
Winter: December to February
Average highs bottom out at 34°F in January, between 38°F in December and 37°F in February, with average lows between 19°F and 24°F. The average low is at or below freezing in all three months. Together the three months average 9 inches of precipitation, about 20% of the yearly total and less than in any other season. Snowfall averages about 29 inches for the season. Daylight is at its shortest, about 9.1 hours in December.
Spring: March to May
Average highs climb from 46°F in March to 70°F in May, with average lows between 28°F and 49°F. The average low is at or below freezing in March. Together the three months average 11.7 inches of precipitation, about 26% of the yearly total. Snowfall averages about 8.2 inches for the season, most of it in March. Daylight lengthens from about 11.7 hours in March to 14.2 in May.
Summer: June to August
Average highs peak at 81°F in July, between 77°F in June and 80°F in August, with average lows between 57°F and 61°F. Together the three months average 12.3 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 73°F in September to 49°F in November, with average lows between 33°F and 53°F. Together the three months average 11.7 inches of precipitation, about 26% of the yearly total. Snowfall averages about 1.2 inches for the season, most of it in November. Daylight shortens from about 12.3 hours in September to 9.7 in November.
What the National Park Service says about the weather
The park is located in Cambria County, PA, and is at the summit of the Allegheny Mountains. Therefore, the park often takes on winter extremes. If planning on traveling from a long distance, please contact the park beforehand to ensure that the facilities are open. Please consult weather forecasts to ensure conditions are safe to travel in. Spring, summer, and fall are generally uneventful, but severe thunderstorms can occur.
Weather description courtesy of the National Park Service — official park site.
Today's forecast for Allegheny Portage Railroad
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 40.43°N, 78.57°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 Allegheny Portage Railroad National Historic Site →
Weather and crowds together
July is both the warmest month and the busiest, with about 1.4× 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 Allegheny Portage Railroad National Historic Site. For hotels, cabins and rentals close to the park, see where to stay near Allegheny Portage Railroad.
Where to stay near Allegheny Portage Railroad
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Frequently Asked Questions
July is the warmest month at Allegheny Portage Railroad National Historic Site, with an average high of 81°F and an average low of 61°F. That is the 1991–2020 average at the nearest long-record NOAA station, 7.2 miles from the park's reference point. Temperatures inside the park can differ, particularly with elevation.
January is the coldest month at Allegheny Portage Railroad National Historic Site, with an average low of 19°F and an average high of 34°F, based on NOAA 1991–2020 climate normals.
May is the wettest month, with about 4.4 inches of precipitation. February is the driest, at about 2.7 inches. The station records about 44.7 inches of precipitation in an average year.
Yes. The nearest long-record NOAA station, 7.2 miles from the park's reference point, averages about 38 inches of snow a year. February is the snowiest month, at about 11 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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Keep exploring
Sources: NOAA NCEI U.S. Climate Normals 1991–2020 (station USC00360140), 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.