Early autumn · Weather & things to do
New Hampshire in September
New Hampshire cools off: highs slip to 74°F (23°C), from 80°F in August, with lows of 53°F (12°C) and about 3.7 in (93 mm) of rain.
September opens the best stretch on our comfort score, at 87/100 (the top score of the year).
- Avg high
- 74°F (23°C)
- Avg low
- 53°F (12°C)
- Rain
- 3.7 in (93 mm)
- Humidity
- 77%
- Cloud cover
- 51%
- Daylight
- ~12 h 17 min
- Comfort score
- 87/100 · Great
What September feels like
Days are warm, averaging 74°F (23°C), easy weather for being outside from morning to evening.
Nights cool to an average low of 53°F (12°C).
Some rain is likely, about 3.7 in (93 mm) in the month, so pack for a shower or two.
Plan around September
September is one of New Hampshire's best months on the climate data.
- Last warm month for a while: October highs fall to 60°F.
- Opens the best-scoring stretch on our comfort score: May and September.
- Last of the best-scoring months: by October, the score drops to 73/100.
- Comfort improves from 79/100 in August to 87/100.
- September sits inside the Sep – Oct window our New England Fall Foliage route recommends.
What to pack for September
- Light, breathable clotheshighs average 74°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 New Hampshire in September
With conditions on your side, the picks below favor time outside.
Kancamagus Highway
34.5-mile scenic road between Lincoln and Conway with no services and wide overlooks.
Why now Our curated notes say it's best late Sep–mid Oct.
Loon Mountain Scenic Gondola
12-minute gondola up Loon Peak with an observation tower over 24 of NH's 4,000-footers.
Why now September scores 87/100 for comfort, good conditions for being outside.
Woodstock Inn Brewery
Brewpub with an outdoor patio in North Woodstock, a natural end to a notch day.
Sabbaday Falls
Easy 0.7-mile walk to a tiered waterfall in a narrow flume off the Kancamagus.
Why now Highs near 74°F and 3.7 in of monthly rain make this an easy outdoor pick.
Moat Mountain Smokehouse & Brewing Co.
Barbecue and house beers in North Conway at the east end of the Kancamagus.
Nearby in September
- Portsmouth in September~42 mi · highs 69°F, 3.5 in rain · 3°C (6°F) cooler by day, about as wet
- Woodstock in September~56 mi · highs 71°F, 3.6 in rain · 2°C (3°F) cooler by day, about as wet
- Boston in September~63 mi · highs 75°F, 3.6 in rain · similar daytime temperatures, about as wet
- Portland, Maine in September~73 mi · highs 65°F, 3.8 in rain · 5°C (9°F) cooler by day, about as wet
NASA POWER 2001–2025 monthly averages on a ~50 km grid, temperatures adjusted from the grid cell's ~259 m to New Hampshire's ~91 m elevation (standard lapse rate). Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
New Hampshire in September: quick answers
Is September a good time to visit New Hampshire?
Yes. On the climate data it's one of the best months, scoring 87/100. Expect highs of 74°F (23°C) and 3.7 in (93 mm) of rain. September is inside the Sep – Oct window our New England Fall Foliage route recommends.
How hot is New Hampshire in September?
Average highs are 74°F (23°C) and average lows 53°F (12°C), making it the 4th-warmest month by daytime highs.
Does it rain a lot in New Hampshire in September?
Some: about 3.7 in (93 mm) of rain falls across September on average, the 5th-driest month of the year. The annual total is about 45.4 in (1153 mm).
What should I pack for New Hampshire in September?
Bring light, breathable clothes (highs average 74°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 New Hampshire
Routes in season in September
- New England Fall Foliage Sep – Oct
Planning New Hampshire in September?
Plan it together in TripsCircle: one itinerary, one shared packing list and costs split as you go.