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September Weather in Surrey, United States

Last updated: June 24, 2025

In Surrey, United States, the average temperature in September hovers around 15°C (59°F). However, temperatures can range from a chilly -1°C (30°F) to a sweltering 34°C (94°F). Expect about 64 mm (2.5 in) of precipitation over 7 days, contributing to an average humidity of 71%.

September Temperature in Surrey

In September in Surrey, the average temperature is 15°C (59°F). Maximum temperatures can reach 34°C (94°F), while minimums can drop as low as -1°C (30°F). This climate makes Surrey a versatile destination for travelers, offering both warm days and cooler nights to enjoy different experiences.

September Weather in Surrey: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Surrey, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Surrey, September typically has an average temperature of 15°C (59°F), with highs reaching up to 34°C (94°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec12927385567716859422819
Data source: Temperature data for Surrey 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 Surrey

In Surrey in September, the precipitation amount is 64 mm (2.5 in) accumulated over a period of 7 days.

September Precipitation Trends in Surrey

The chart displays monthly precipitation patterns in Surrey, 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 Surrey, September typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec131723273572645364392523
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Surrey

In Surrey in September humidity is 71%. With an average temperature of 15°C (59°F), this humidity feels like a damp embrace, making outdoor activities slightly uncomfortable and encouraging travelers to seek shade or indoor attractions to escape the muggy air.

September Average Humidity in Surrey

This chart illustrates the average monthly humidity levels in Surrey, 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 Surrey is approximately 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%91%87%78%73%71%76%77%71%75%84%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Surrey

In Surrey in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Surrey.

Maximum UV Index Levels in Surrey for September

The chart shows the monthly maximum UV Index (UVI) for Surrey 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 Surrey typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245989987422
Data source: Surrey 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 Surrey Compares to Other Months

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

This table compares monthly weather conditions in Surrey, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-11°C (12°F)13 mm (0.5 inches)89%low
February Weather-13°C (10°F)17 mm (0.7 inches)91%moderate
March Weather-3°C (27°F)23 mm (0.9 inches)87%moderate
April Weather3°C (38°F)27 mm (1.1 inches)78%very high
May Weather13°C (55°F)35 mm (1.4 inches)73%very high
June Weather20°C (67°F)72 mm (2.8 inches)71%very high
July Weather22°C (71°F)64 mm (2.5 inches)76%very high
August Weather20°C (68°F)53 mm (2.1 inches)77%very high
September Weather15°C (59°F)64 mm (2.5 inches)71%high
October Weather6°C (43°F)39 mm (1.5 inches)75%moderate
November Weather-2°C (29°F)25 mm (1.0 inches)84%low
December Weather-7°C (19°F)23 mm (0.9 inches)92%low

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