Early autumn · Weather & things to do
Mount Washington in September
Mount Washington cools off: highs slip to 77°F (25°C), from 84°F in August, with lows of 53°F (12°C) and about 3.3 in (85 mm) of rain.
September opens the best stretch on our comfort score, at 87/100 (the top score of the year).
- Avg high
- 77°F (25°C)
- Avg low
- 53°F (12°C)
- Rain
- 3.3 in (85 mm)
- Humidity
- 71%
- Cloud cover
- 51%
- Daylight
- ~12 h 15 min
- Comfort score
- 87/100 · Great
What September feels like
Days are warm, averaging 77°F (25°C), easy weather for being outside from morning to evening.
There's a big swing between day and night, about 13°C (24°F), so mornings and evenings feel much cooler than the afternoon.
Some rain is likely, about 3.3 in (85 mm) in the month, so pack for a shower or two.
Plan around September
September is one of Mount Washington's best months on the climate data.
- Last warm month for a while: October highs fall to 63°F.
- Opens the best-scoring stretch on our comfort score: May and September & October.
- Comfort improves from 79/100 in August to 87/100.
- Our Pittsburgh New Year's Eve route is planned for Dec 30 – Jan 1, a window set by the holiday season rather than the weather — September falls outside it.
What to pack for September
- Light, breathable clothes77°F afternoons
- A warm layer for eveningsnights drop to 53°F
- Packable rain jacket or umbrellaa shower or two is likely
- Comfortable walking shoesmost places below are best reached on foot or with short walks
What to do in Mount Washington in September
With conditions on your side, the picks below favor time outside.
Monongahela Incline
Oldest operating funicular in the US, from 1870, running down the hill to Station Square.
Why now September scores 87/100 for comfort, good conditions for being outside.
Strip District
Old wholesale produce district along Penn Avenue, now full of food shops, coffee roasters and markets.
Station Square
Old Pittsburgh & Lake Erie Railroad station and freight buildings on the riverbank, now shops and restaurants.
Why now Highs near 77°F and 3.3 in of monthly rain make this an easy outdoor pick.
Grandview Avenue overlooks
Row of overlook platforms along the ridge with a full view of downtown, the Point and the bridges.
Why now One to do outside while the weather is on your side.
Nearby in September
- Cleveland in September~115 mi · highs 73°F, 3.5 in rain · 3°C (5°F) cooler by day, about as wet
- German Village in September~161 mi · highs 79°F, 3.0 in rain · similar daytime temperatures, about as wet
- Shenandoah in September~164 mi · highs 74°F, 4.1 in rain · 2°C (3°F) cooler by day, wetter
- Washington, DC in September~190 mi · highs 80°F, 4.2 in rain · 2°C (3°F) warmer by day, wetter
These averages also cover Downtown & the Cultural District.
NASA POWER 2001–2025 monthly averages on a ~50 km grid. Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Mount Washington in September: quick answers
Is September a good time to visit Mount Washington?
Yes. On the climate data it's one of the best months, scoring 87/100. Expect highs of 77°F (25°C) and 3.3 in (85 mm) of rain.
How hot is Mount Washington in September?
Average highs are 77°F (25°C) and average lows 53°F (12°C), making it the 4th-warmest month by daytime highs.
Does it rain a lot in Mount Washington in September?
Some: about 3.3 in (85 mm) of rain falls across September on average, the 5th-wettest month of the year. The annual total is about 39.0 in (991 mm).
What should I pack for Mount Washington in September?
Bring light, breathable clothes (77°F afternoons), a warm layer for evenings (nights drop to 53°F), packable rain jacket or umbrella (a shower or two is likely) and comfortable walking shoes (most places below are best reached on foot or with short walks).
More on Mount Washington
Planning Mount Washington in September?
Bring the crew into one shared trip: vote on dates, build the day-by-day plan, split costs and share one packing list.