Updated October 2026
Catoctin Mountain Park Weather by Month
Catoctin Mountain Park is warmest in July, when the nearest NOAA climate station averages a high of 84°F and a low of 65°F, and coldest in January, with an average high of 39°F and an average low of 23°F. September is the wettest month, with about 5.3 inches of precipitation.
These figures are NOAA's 1991–2020 climate normals, the 30-year average for each calendar month, from the nearest long-record weather station, 1.1 miles from the park's reference point. A single station cannot describe a whole park: temperatures elsewhere in Catoctin Mountain Park can differ from these, particularly with elevation.
Warmest month
Jul
84°F avg high
Coldest month
Jan
23°F avg low
Wettest month
Sep
5.3 in avg
Longest days
Jun
14.8 h of daylight
Average weather at Catoctin Mountain by month
| Month | Avg high | Avg low | Precipitation | Daylight |
|---|---|---|---|---|
| January | 39°F | 23°F | 3.8 in | 9.5 h |
| February | 42°F | 25°F | 3.0 in | 10.5 h |
| March | 52°F | 31°F | 4.4 in | 11.7 h |
| April | 65°F | 42°F | 4.0 in | 13.1 h |
| May | 73°F | 52°F | 4.9 in | 14.2 h |
| June | 80°F | 60°F | 4.2 in | 14.8 h |
| July | 84°F | 65°F | 3.7 in | 14.5 h |
| August | 81°F | 63°F | 4.0 in | 13.6 h |
| September | 75°F | 58°F | 5.3 in | 12.2 h |
| October | 65°F | 46°F | 4.1 in | 10.9 h |
| November | 54°F | 36°F | 3.7 in | 9.8 h |
| December | 43°F | 28°F | 3.5 in | 9.2 h |
| Year total | 48.6 in |
NOAA 1991–2020 climate normals from station USC00181530, 1.1 miles from the park's reference point. Daylight is the monthly average, computed from the park's latitude. Each month links to how crowded Catoctin Mountain is at that time of year.
Catoctin Mountain weather by season
Winter: December to February
Average highs bottom out at 39°F in January, between 43°F in December and 42°F in February, with average lows between 23°F and 28°F. The average low is at or below freezing in all three months. Together the three months average 10.3 inches of precipitation, about 21% of the yearly total and less than in any other season. Daylight is at its shortest, about 9.2 hours in December.
Spring: March to May
Average highs climb from 52°F in March to 73°F in May, with average lows between 31°F and 52°F. The average low is at or below freezing in March. Together the three months average 13.3 inches of precipitation, about 27% of the yearly total and more than in any other season. Daylight lengthens from about 11.7 hours in March to 14.2 in May.
Summer: June to August
Average highs peak at 84°F in July, between 80°F in June and 81°F in August, with average lows between 60°F and 65°F. Together the three months average 11.9 inches of precipitation, about 24% of the yearly total. Daylight is at its longest, about 14.8 hours in June.
Fall: September to November
Average highs fall from 75°F in September to 54°F in November, with average lows between 36°F and 58°F. Together the three months average 13.1 inches of precipitation, about 27% of the yearly total. Daylight shortens from about 12.2 hours in September to 9.8 in November.
What the National Park Service says about the weather
Summer (June-Aug) average temperature is between 61 and 81 degrees Fahrenheit. Fall (Sep-Nov) average temperature is between 45 and 64 degrees Fahrenheit. Fall foliage is at its peak in mid-October Winter (Dec-Feb) average temperature is between 24 and 41 degrees Fahrenheit. Winter snowfall is between 5-12" per month. Spring (March-May) average temperature is between 41 and 63 degrees Fahrenheit. Average precipitation is approximately 4 inches per month. (Source: usclimatedata.com)
Weather description courtesy of the National Park Service — official park site.
Today's forecast for Catoctin Mountain
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 39.65°N, 77.46°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 Catoctin Mountain Park →
Weather and crowds together
July, the warmest month, sees about 1.2× the visitors of the park's average month. October is the busiest month of the year and February the quietest. To see those crowds set against the weather for all twelve months, read the best time to visit Catoctin Mountain Park. For hotels, cabins and rentals close to the park, see where to stay near Catoctin Mountain.
Where to stay near Catoctin Mountain
Picked a month for Catoctin Mountain Park? Compare hotels, cabins and vacation rentals near the park with live availability and prices.
Top-rated places to stay near Catoctin Mountain
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 Catoctin Mountain Park, with an average high of 84°F and an average low of 65°F. That is the 1991–2020 average at the nearest long-record NOAA station, 1.1 miles from the park's reference point. Temperatures inside the park can differ, particularly with elevation.
January is the coldest month at Catoctin Mountain Park, with an average low of 23°F and an average high of 39°F, based on NOAA 1991–2020 climate normals.
September is the wettest month, with about 5.3 inches of precipitation. February is the driest, at about 3 inches. The station records about 48.6 inches of precipitation in an average year.
Daylight at Catoctin Mountain Park runs from about 9.2 hours a day in December to about 14.8 hours in June, computed from the park's latitude.
Weather at nearby parks
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46 mi away · warmest in July (84°F)
Keep exploring
Sources: NOAA NCEI U.S. Climate Normals 1991–2020 (station USC00181530), 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.