United StatesAverage weather for Jefferson in September
It's warm in September in Jefferson with an average temperature of 23°C. Temperatures this month range from a low of 16°C to a high of 28°C. At night, you can expect temperatures between 10°C and 17°C.
Start of September
The month of September starts in Jefferson with warm temps, averaging around 25°C during the day and nights around 15°C. You can expect regular precipitation, but there will also be some sunny days in the early part of the month.
Mid September
By mid-September, daytime temps stay steady at around 25°C, with nights around 14°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of September
By the end of September, the average daytime temperature in Jefferson is around 22°C, while nighttime temps are about 12°C. A shower might pop up, but overall, the weather will be dry and sunny.
In September, there is an average of 138 mm of precipitation, spread over 8 days. The wind speed is around 3 Bft, mostly coming from the Southwest.
Jefferson in September |
New York | ||
|---|---|---|---|
 Average temperature |
23°C | 27°C | |
 Max. temperature |
28°C | 31°C | |
| Min. temperature |
16°C | -5°C | |
 Total precipitation |
138 mm | 57 mm | |
| Rainy days |
8 days | 9 days | |
August
UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is September a good time to visit Jefferson?
Looking for sun? September isn’t a good month to be in Jefferson. The temperature is nice, but there’s too much chance of rain.
Temperature records
With 34°C in 2023, Jefferson reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 13°C in 2018. The extreme nighttime temperatures ranged from a lowest recorded value of 1°C to a highest value of 23°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 8 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
