United StatesThe weather in September in New Hampshire
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.
Looking for great weather? September is a good time to be in New Hampshire. The temperatures are nice, and there’s not too much rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for New Hampshire, United States. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 34°C in 2023, New Hampshire reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 11°C in 2017. The extreme nighttime temperatures ranged from a lowest recorded value of -2°C to a highest value of 22°C.
Rainfall amount
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.
Daily weather in September for New Hampshire
Click on any day in September to get detailed info about the usual weather on that day in New Hampshire. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| New Hampshire | New York | |
|---|---|---|
| Average temperature | 24°C | 27°C |
| Max. temperature | 28°C | 31°C |
| Min. temperature | 8°C | -5°C |
| Total precipitation | 80 mm | 57 mm |
| Rainy days | 11 days | 9 days |
Start of September
The month of September starts in New Hampshire with hot temps, averaging around 27°C during the day and nights around 14°C.
Mid September
By mid-September, daytime temps drop to around 24°C, with nights around 12°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of September
By the end of September, the average daytime temperature in New Hampshire is around 23°C, while nighttime temps are about 10°C. A shower might pop up, but overall, the weather will be dry and sunny.
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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.
Check out the climate of New Hampshire for all months and discover the best travel time
The climate in New Hampshire is based on weather data from . Other places, like New York City, Miami or Los Angeles, might have different weather. You can check out all destinations in New Hampshire to get the full picture of the climate.
Temperature charts
These charts show the average temperatures in September in New Hampshire, United States. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in New Hampshire
Temperature in September in New Hampshire over the years
Precipitation charts
These charts show the average amount of precipitation in September in New Hampshire, United States. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in New Hampshire
Total precipitation in September in New Hampshire over the years
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.
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.