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United StatesThe weather in September in Highland Park
It's warm in September in Highland Park with an average temperature of 25°C. Temperatures this month range from a low of 19°C to a high of 30°C. At night, you can expect temperatures between 10°C and 20°C.
Looking for sun? September isn’t a good month to be in Highland Park. The temperature is nice, but there’s too much chance of 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 Highland Park, Illinois. 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 2017, Highland Park reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 12°C in 2014. The extreme nighttime temperatures ranged from a lowest recorded value of 4°C to a highest value of 25°C.
Rainfall amount
In September, there is an average of 164 mm of precipitation, spread over 17 days. The wind speed is around 4 Bft, mostly coming from the Southeast.
Daily weather in September for Highland Park
Click on any day in September to get detailed info about the usual weather on that day in Highland Park. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Highland Park | New York | |
|---|---|---|
| Average temperature | 25°C | 27°C |
| Max. temperature | 30°C | 31°C |
| Min. temperature | 10°C | -5°C |
| Total precipitation | 164 mm | 57 mm |
| Rainy days | 17 days | 9 days |
Start of September
The month of September starts in Highland Park with hot temps, averaging around 27°C during the day and nights around 19°C.
Mid September
By mid-September, daytime temps drop to around 26°C, with nights around 16°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 Highland Park is around 23°C, while nighttime temps are about 14°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 Highland Park for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in September in Highland Park, Illinois. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Highland Park
Temperature in September in Highland Park over the years
Precipitation charts
These charts show the average amount of precipitation in September in Highland Park, Illinois. 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 Highland Park
Total precipitation in September in Highland Park over the years
Daily UV index in September in Highland Park
This chart shows the average daily UV index in September in Highland Park, 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 Highland Park
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Average weather in Highland Park by month
Click on a month below to see detailed weather info for Highland Park. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.