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United StatesThe weather in September in Valley Stream
It's warm in September in Valley Stream with an average temperature of 25°C. Temperatures this month range from a low of 20°C to a high of 29°C. At night, you can expect temperatures between 15°C and 21°C.
Looking for sun? September isn’t a good month to be in Valley Stream. 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 Valley Stream, New York. 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 2018, Valley Stream reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 15°C in 2023. The extreme nighttime temperatures ranged from a lowest recorded value of 8°C to a highest value of 26°C.
Rainfall amount
In September, there is an average of 110 mm of precipitation, spread over 12 days. The wind speed is around 4 Bft, mostly coming from the South.
Daily weather in September for Valley Stream
Click on any day in September to get detailed info about the usual weather on that day in Valley Stream. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Valley Stream | New York | |
|---|---|---|
| Average temperature | 25°C | 27°C |
| Max. temperature | 29°C | 31°C |
| Min. temperature | 15°C | -5°C |
| Total precipitation | 110 mm | 57 mm |
| Rainy days | 12 days | 9 days |
Start of September
The month of September starts in Valley Stream with hot temps, averaging around 27°C during the day and nights around 20°C.
Mid September
By mid-September, daytime temps drop to around 26°C, with nights around 18°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 Valley Stream is around 24°C, while nighttime temps are about 17°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
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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.
Check out the climate of Valley Stream for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in September in Valley Stream, New York. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Valley Stream
Temperature in September in Valley Stream over the years
Precipitation charts
These charts show the average amount of precipitation in September in Valley Stream, New York. 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 Valley Stream
Total precipitation in September in Valley Stream over the years
Daily UV index in September in Valley Stream
This chart shows the average daily UV index in September in Valley Stream, 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 Valley Stream
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Average weather in Valley Stream by month
Click on a month below to see detailed weather info for Valley Stream. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.