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September Weather in North Valley Stream, United States

Last updated: June 24, 2025

In September, the average temperature in North Valley Stream, United States is a pleasant 21°C (70°F). You can expect a minimum of 10°C (49°F) and a maximum of 32°C (91°F), making it a versatile month for outdoor activities. However, be prepared for some rain, as precipitation averages around 91 mm (3.6 in) over 10 days. The average humidity remains at a comfortable 68%, ensuring a refreshing atmosphere throughout the month.

September Temperature in North Valley Stream

In September in North Valley Stream, the average temperature is 21°C (70°F). Maximums can reach 32°C (91°F), and minimums can be as low as 10°C (49°F). This makes North Valley Stream an ideal destination for travelers looking to enjoy mild weather and comfortable outdoor activities.

September Weather in North Valley Stream: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in North Valley Stream, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In North Valley Stream, September typically has an average temperature of 21°C (70°F), with highs reaching up to 32°C (91°F) and lows dropping to around 10°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec343641516171777670614739
Data source: Temperature data for North Valley Stream generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in North Valley Stream

In North Valley Stream in September, the precipitation amount totals 91 mm (3.6 in) over a span of 10 days.

September Precipitation Trends in North Valley Stream

The chart displays monthly precipitation patterns in North Valley Stream, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In North Valley Stream, September typically receives around 91 mm (3.6 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec7210698115117891421249113090117
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in North Valley Stream

In North Valley Stream in September humidity is 68%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace, making the air feel slightly heavy and sticky, which can be quite exhausting for travelers.

September Average Humidity in North Valley Stream

This chart illustrates the average monthly humidity levels in North Valley Stream, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in North Valley Stream is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in North Valley Stream

In North Valley Stream in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in North Valley Stream.

Maximum UV Index Levels in North Valley Stream for September

The chart shows the monthly maximum UV Index (UVI) for North Valley Stream in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in North Valley Stream typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: North Valley Stream September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in North Valley Stream Compares to Other Months

Weather in North Valley Stream varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in North Valley Stream, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in North Valley Stream, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (35°F)72 mm (2.8 inches)84%moderate
February Weather2°C (37°F)106 mm (4.2 inches)82%moderate
March Weather5°C (42°F)98 mm (3.9 inches)81%high
April Weather10°C (51°F)115 mm (4.5 inches)78%very high
May Weather16°C (61°F)117 mm (4.6 inches)69%very high
June Weather22°C (71°F)89 mm (3.5 inches)69%very high
July Weather25°C (78°F)142 mm (5.6 inches)62%very high
August Weather24°C (76°F)124 mm (4.9 inches)65%very high
September Weather21°C (70°F)91 mm (3.6 inches)68%very high
October Weather16°C (61°F)130 mm (5.1 inches)74%high
November Weather8°C (47°F)90 mm (3.5 inches)82%moderate
December Weather4°C (39°F)117 mm (4.6 inches)80%low

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