United StatesAverage weather for Union in September
It's pleasantly warm in September in Union with an average temperature of 22°C. Temperatures this month range from a low of 19°C to a high of 26°C. At night, you can expect temperatures between 8°C and 13°C.
Start of September
The month of September starts in Union with warm temps, averaging around 25°C during the day and nights around 12°C. There’s little chance of precipitation. The weather’s mostly sunny and dry.
Mid September
By mid-September, daytime temps drop to around 22°C, with nights around 11°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 Union is around 21°C, while nighttime temps are about 10°C. A shower might pop up, but overall, the weather will be dry and sunny.
In September, there is an average of 78 mm of precipitation, spread over 8 days. The wind speed is around 3 Bft, mostly coming from the South.
Union in September |
New York | ||
|---|---|---|---|
 Average temperature |
22°C | 27°C | |
 Max. temperature |
26°C | 31°C | |
| Min. temperature |
19°C | -5°C | |
 Total precipitation |
78 mm | 57 mm | |
| Rainy days |
8 days | 9 days | |
August
UV index
The UV index is a maximum of 5 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 Union?
Looking for great weather? September is a good time to be in Union. The temperatures are nice, and there’s not too much rain.
Temperature records
With 34°C in 2017, Union reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 12°C in 2021. The extreme nighttime temperatures ranged from a lowest recorded value of 1°C to a highest value of 17°C.
Check out the climate of Union for all months and discover the best travel time
Daily Temperature in September in Union
This chart shows the average daily high and low temperatures in September for Union, 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 Union
The chart below shows the average daily precipitation in September for Union, 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 Union.
Daily UV index in September in Union
This chart shows the average daily UV index in September in Union, 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 Union over the years
This chart shows the average temperature in September in Union, measured in degrees Celsius, over the past few years.
Total precipitation in September in Union over the years
This chart shows the average precipitation in September in Union, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in September for Union
Click on any day in September to get detailed info about the usual weather on that day in Union. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Union
Have you been to Union in September?
Share your weather experience in September in Union.
Average weather in Union by month
Click on a month below to see detailed weather info for Union. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
