Weathermondo.com
United StatesThe weather in September in Grassflat
It's warm in September in Grassflat with an average temperature of 23°C. Temperatures this month range from a low of 20°C to a high of 28°C. At night, you can expect temperatures between 10°C and 16°C.
Looking for great weather? September is a good time to be in Grassflat. The temperatures are nice, and there’s not too much 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 Grassflat, Pennsylvania. 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 33°C in 2018, Grassflat reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 12°C in 2023. The extreme nighttime temperatures ranged from a lowest recorded value of -1°C to a highest value of 22°C.
Rainfall amount
In September, there is an average of 96 mm of precipitation, spread over 12 days. The wind speed is around 3 Bft, mostly coming from the South.
Daily weather in September for Grassflat
Click on any day in September to get detailed info about the usual weather on that day in Grassflat. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Grassflat | New York | |
|---|---|---|
| Average temperature | 23°C | 27°C |
| Max. temperature | 28°C | 31°C |
| Min. temperature | 10°C | -5°C |
| Total precipitation | 96 mm | 57 mm |
| Rainy days | 12 days | 9 days |
Start of September
The month of September starts in Grassflat with warm temps, averaging around 25°C during the day and nights around 15°C.
Mid September
By mid-September, daytime temps drop to around 24°C, with nights around 13°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 Grassflat is around 22°C, while nighttime temps are about 11°C. A shower might pop up, but overall, the weather will be dry and sunny.
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.
Check out the climate of Grassflat for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in September in Grassflat, Pennsylvania. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Grassflat
Temperature in September in Grassflat over the years
Precipitation charts
These charts show the average amount of precipitation in September in Grassflat, Pennsylvania. 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 Grassflat
Total precipitation in September in Grassflat over the years
Daily UV index in September in Grassflat
This chart shows the average daily UV index in September in Grassflat, 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 Grassflat
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Average weather in Grassflat by month
Click on a month below to see detailed weather info for Grassflat. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.