Normal weather for New Hampshire in September
It's warm in September in New Hampshire with an average temperature of 24°C. Temperatures this month range from a low of 18°C to a high of 28°C. At night, you can expect temperatures between 8°C and 16°C.
In September, there is an average of 80 mm of precipitation, spread over 11 days. The wind speed is around 3 Bft, mostly coming from the South.
The UV index is a maximum of 6 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
New Hampshire in September |
UK | ||
|---|---|---|---|
 Average Temperature |
24°C | 20°C | |
 High Temp |
28°C | 22°C | |
| Low Temp |
18°C | 17°C | |
 Total Precipitation |
80 mm | 44 mm | |
| Rainy Days |
11 days | 8 days | |
The climate of New Hampshire is based on weather data from . Other spots, like New York City, Miami or Los Angeles, might have different weather. You can check out all destinations in New Hampshire for a full picture of the climate.
Start of September
The month of September starts in New Hampshire with hot temperatures, averaging around 27°C during the day and nights close to 14°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.
Mid-September
By mid-September, the average daytime temperature drops to around 24°C, with nights close to 12°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
End of September
By the end of September, the average daytime temperature in New Hampshire will be around 23°C, with nights close to 10°C. A shower might show up, but overall the weather will be dry and sunny.
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Is September a good time to visit New Hampshire?
Want nice weather? Then September is a great time to be in New Hampshire. You’ll have pleasant temperatures and not too much rain this month.
Temperature records for New Hampshire in September
With 34°C, New Hampshire hit the highest temperature in the last 10 years in September 2023. The lowest daytime temperature in this month was 11°C in 2017. The extreme night temperatures ranged from a low of -2°C to a high of 22°C.
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Daily Temperature in September in New Hampshire
This chart shows the average daily temperatures, both day and night, for each day in September in New Hampshire, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in September in New Hampshire
The chart below shows the average daily precipitation in September for New Hampshire, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect around 11 days of rain in New Hampshire.
Daily UV Index in September in New Hampshire
This chart shows the average daily UV index in September in New Hampshire, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in New Hampshire Over the Years
This chart shows the average temperature in September in New Hampshire, measured in degrees Celsius, over the past years.
Total Precipitation in September in New Hampshire Over the Years
This chart shows the average precipitation in September in New Hampshire, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in September for New Hampshire
Click on a specific day in September for detailed info on the typical weather on that day in New Hampshire. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in New Hampshire
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Average Weather in New Hampshire by Month
Click on a month below to see detailed weather info for New Hampshire. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of New Hampshire for all months at once
