9+ Best New Hampshire September Weather Forecasts

new hampshire september weather

9+ Best New Hampshire September Weather Forecasts

Early autumn in this New England state offers a transition from summer’s warmth to the crisp air of fall. Days are typically mild and sunny, with average highs ranging from the low 60s (F) to low 70s (F) in the southern regions, gradually decreasing as one travels north. Nights become noticeably cooler, often dipping into the 40s (F) and even 30s (F) in the higher elevations and northern valleys. This period experiences diminishing humidity and increasingly clear skies, making it a popular time for outdoor activities.

This time of year offers a pleasant climate for enjoying the state’s vibrant fall foliage, which begins its transformation in the northern mountains and gradually spreads southward throughout the month. The combination of comfortable temperatures and colorful landscapes attracts many visitors, boosting tourism and providing ideal conditions for hiking, camping, and other recreational pursuits. Historically, this period marked the beginning of harvest season, a time of significant importance for local communities.

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