September weather forecast and climate
New Hampshire, USA

Flag of New Hampshire, USA
Flag of New Hampshire, USA

Weather in September

September transitions to the beautiful autumn season with delectably warm temperatures. The atmosphere is damp, and the sun peeks out of the cloud cover now and then. Sunny days are plenty, and the daylight hours are long. The average high temperatures are in the ideal 65°F (18.3°C) to 75°F (23.9°C) range, while the nights are relatively cooler in the average low-temperature range of 45°F (7.2°C) to 55°F (12.8°C).
Summer thunderstorms extend to the early fall season, and there is an outside chance of a hurricane or tornado with its origins in the Atlantic Ocean. Cloudy skies give rise to a maximum humidity of the year of 76% as rain marks its presence regularly in small quantities.
The leaves start to change colors by September as the colorful fall season spreads its wings over New Hampshire. Wildlife is active during the autumn, especially hibernating animals that feed before the winter, and these make for pleasant sightings along with the beautiful flora!
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