United StatesAverage weather for Mount Vernon in September
It's pleasantly warm in September in Mount Vernon with an average temperature of 21°C. Temperatures this month range from a low of 18°C to a high of 24°C. At night, you can expect temperatures between 10°C and 13°C.
Start of September
The month of September starts in Mount Vernon with warm temps, averaging around 23°C during the day and nights around 13°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 21°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 Mount Vernon is around 20°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 77 mm of precipitation, spread over 8 days. The wind speed is around 3 Bft, mostly coming from the Southwest.
Mount Vernon in September |
New York | ||
|---|---|---|---|
 Average temperature |
21°C | 27°C | |
 Max. temperature |
24°C | 31°C | |
| Min. temperature |
18°C | -5°C | |
 Total precipitation |
77 mm | 57 mm | |
| Rainy days |
8 days | 9 days | |
August
UV index
The UV index is a maximum of 4 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Is September a good time to visit Mount Vernon?
Looking for great weather? September is a good time to be in Mount Vernon. The temperatures are nice, and there’s not too much rain.
Temperature records
With 30°C in 2020, Mount Vernon reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 14°C in 2017. The extreme nighttime temperatures ranged from a lowest recorded value of 4°C to a highest value of 17°C.
Check out the climate of Mount Vernon for all months and discover the best travel time
Daily Temperature in September in Mount Vernon
This chart shows the average daily high and low temperatures in September for Mount Vernon, 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 Mount Vernon
The chart below shows the average daily precipitation in September for Mount Vernon, 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 Mount Vernon.
Daily UV index in September in Mount Vernon
This chart shows the average daily UV index in September in Mount Vernon, 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 Mount Vernon over the years
This chart shows the average temperature in September in Mount Vernon, measured in degrees Celsius, over the past few years.
Total precipitation in September in Mount Vernon over the years
This chart shows the average precipitation in September in Mount Vernon, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in September for Mount Vernon
Click on any day in September to get detailed info about the usual weather on that day in Mount Vernon. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Mount Vernon
Have you been to Mount Vernon in September?
Share your weather experience in September in Mount Vernon.
Average weather in Mount Vernon by month
Click on a month below to see detailed weather info for Mount Vernon. 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 Mount Vernon for all months at once
