United StatesAverage weather for Valley Stream in September
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.
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. You can expect regular precipitation, but there will also be some sunny days in the early part of the month.
With the temperature difference between day and night, it’s smart to wear layers.
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.
Since it cools down at night, it’s a good idea to wear layers.
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.
In September, there is an average of 110 mm of precipitation, spread over 7 days. The wind speed is around 4 Bft, mostly coming from the South.
Valley Stream in September |
New York | ||
|---|---|---|---|
 Average temperature |
25°C | 27°C | |
 Max. temperature |
29°C | 31°C | |
| Min. temperature |
20°C | -5°C | |
 Total precipitation |
110 mm | 57 mm | |
| Rainy days |
7 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 Valley Stream?
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.
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.
Check out the climate of Valley Stream for all months and discover the best travel time
Daily Temperature in September in Valley Stream
This chart shows the average daily high and low temperatures in September for Valley Stream, 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 Valley Stream
The chart below shows the average daily precipitation in September for Valley Stream, 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 7 days of precipitation in Valley Stream.
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.
Temperature in September in Valley Stream over the years
This chart shows the average temperature in September in Valley Stream, measured in degrees Celsius, over the past few years.
Total precipitation in September in Valley Stream over the years
This chart shows the average precipitation in September in Valley Stream, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
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.
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.
Or check out the climate of Valley Stream for all months at once
