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United StatesThe weather in September in River Road
It's cool to moderate in September in River Road with an average temperature of 18°C. Temperatures this month range from a low of 16°C to a high of 20°C. At night, you can expect temperatures between 10°C and 12°C.
Looking for great weather? September is a good time to be in River Road. 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 River Road, Washington. 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 27°C in 2017, River Road reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 12°C in 2019. The extreme nighttime temperatures ranged from a lowest recorded value of 6°C to a highest value of 17°C.
Rainfall amount
In September, there is an average of 37 mm of precipitation, spread over 7 days. The wind speed is around 3 Bft, mostly coming from the West.
Daily weather in September for River Road
Click on any day in September to get detailed info about the usual weather on that day in River Road. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| River Road | New York | |
|---|---|---|
| Average temperature | 18°C | 27°C |
| Max. temperature | 20°C | 31°C |
| Min. temperature | 10°C | -5°C |
| Total precipitation | 37 mm | 57 mm |
| Rainy days | 7 days | 9 days |
Start of September
The month of September starts in River Road with mild temps, averaging around 19°C during the day and nights around 12°C.
Mid September
By mid-September, daytime temps drop to around 18°C, with nights around 12°C. Not much precipitation expected during this period. It’s mostly dry and sunny.
End of September
By the end of September, the average daytime temperature in River Road is around 17°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 4 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Check out the climate of River Road for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in September in River Road, Washington. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in River Road
Temperature in September in River Road over the years
Precipitation charts
These charts show the average amount of precipitation in September in River Road, Washington. 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 River Road
Total precipitation in September in River Road over the years
Daily UV index in September in River Road
This chart shows the average daily UV index in September in River Road, 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 River Road
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Average weather in River Road by month
Click on a month below to see detailed weather info for River Road. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.