Temperatures 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.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for New Hampshire in September. The red line indicates the max temperatures, and the blue line shows the minimums.
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.
Since temperatures can differ between day and night, it’s a good idea to dress in layers.
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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Precipitation in September
In September, there is an average of 80 mm of precipitation, spread over 7 days. The wind speed is around 3 Bft, mostly coming from the South.
The average precipitation chance is 23% per day this month. Though that seems low, there are also a few days with a higher chance of precipitation.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in September for New Hampshire. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
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 |
7 days | 8 days | |
August
UV index
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.
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.
Check out the climate of New Hampshire for all months and discover the best travel time
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.
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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 7 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
Have you been to New Hampshire in September?
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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
