United StatesAverage weather for Jefferson in September
It's hot in September in Jefferson with an average temperature of 31°C. Temperatures this month range from a low of 29°C to a high of 34°C. At night, you can expect temperatures between 17°C and 23°C.
Start of September
The month of September starts in Jefferson with hot temps, averaging around 33°C during the day and nights around 22°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
Mid September
By mid-September, daytime temps drop to around 32°C, with nights around 20°C. Not much precipitation expected during this period. It’s mostly dry and sunny.
End of September
By the end of September, the average daytime temperature in Jefferson is around 31°C, while nighttime temps are about 19°C. A shower might pop up, but overall, the weather will be dry and sunny.
Because temperatures drop in the evening, wearing layers is recommended.
In September, there is an average of 67 mm of precipitation, spread over 5 days. The wind speed is around 3 Bft, mostly coming from the Southeast.
Jefferson in September |
New York | ||
|---|---|---|---|
 Average temperature |
31°C | 27°C | |
 Max. temperature |
34°C | 31°C | |
| Min. temperature |
29°C | -5°C | |
 Total precipitation |
67 mm | 57 mm | |
| Rainy days |
5 days | 9 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 Jefferson?
September is a good month to be in Jefferson for sunny weather. You’ll have high temperatures and not too much rain.
The hurricane season in Jefferson runs from June to November.
Temperature records
With 41°C in 2023, Jefferson reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 19°C in 2014. The extreme nighttime temperatures ranged from a lowest recorded value of 7°C to a highest value of 26°C.
Check out the climate of Jefferson for all months and discover the best travel time
Daily Temperature in September in Jefferson
This chart shows the average daily high and low temperatures in September for Jefferson, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in Jefferson
The chart below shows the average daily precipitation in September for Jefferson, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed 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 it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 5 days of precipitation in Jefferson.
Daily UV index in September in Jefferson
This chart shows the average daily UV index in September in Jefferson, 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 Jefferson over the years
This chart shows the average temperature in September in Jefferson, measured in degrees Celsius, over the past few years.
Total precipitation in September in Jefferson over the years
This chart shows the average precipitation in September in Jefferson, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in September for Jefferson
Click on any day in September to get detailed info about the usual weather on that day in Jefferson. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Jefferson
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Average weather in Jefferson by month
Click on a month below to see detailed weather info for Jefferson. 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 Jefferson for all months at once
