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September Weather in Cypress, United States

Last updated: June 24, 2025

The average temperature in Cypress, United States during September is a pleasant 22°C (72°F). Expect minimums around 15°C (58°F) and soaring highs of up to 38°C (102°F). With a meager 3 mm (0.1 in) of precipitation spread across 0 days, the weather is likely to be quite dry. Additionally, you can anticipate an average humidity of 68%, creating a warm and comfortable atmosphere.

September Temperature in Cypress

In September, in Cypress, the average temperature is 22°C (72°F). Maximums can reach 38°C (102°F), while minimums can drop as low as 15°C (58°F). This makes September a great time to visit Cypress, offering warm days ideal for outdoor activities and cooler nights perfect for comfortable evenings.

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

The chart illustrates September temperature patterns in Cypress, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cypress, September typically has an average temperature of 22°C (72°F), with highs reaching up to 38°C (102°F) and lows dropping to around 15°C (58°F).
JanFebMarAprMayJunJulAugSepOctNovDec575759636467727372696357
Data source: Temperature data for Cypress 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 Cypress

In Cypress in September, the precipitation amount is 3 mm (0.1 in) during a total of 0 days.

September Precipitation Trends in Cypress

The chart displays monthly precipitation patterns in Cypress, 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 Cypress, September typically receives around 3 mm (0.1 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec6552552312432391868
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Cypress

In Cypress in September humidity is 68%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, slightly stifling but still manageable for traveling, creating an atmosphere that encourages leisurely outdoor activities while prompting occasional breaks for refreshment.

September Average Humidity in Cypress

This chart illustrates the average monthly humidity levels in Cypress, 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 Cypress is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%79%75%71%70%72%73%69%68%67%68%71%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Cypress

In Cypress in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Cypress.

Maximum UV Index Levels in Cypress for September

The chart shows the monthly maximum UV Index (UVI) for Cypress 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 Cypress typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101011111010754
Data source: Cypress 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 Cypress Compares to Other Months

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

This table compares monthly weather conditions in Cypress, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather14°C (57°F)65 mm (2.5 inches)74%moderate
February Weather14°C (58°F)52 mm (2.0 inches)79%high
March Weather15°C (60°F)55 mm (2.2 inches)75%very high
April Weather17°C (63°F)23 mm (0.9 inches)70%very high
May Weather18°C (64°F)12 mm (0.5 inches)70%very high
June Weather20°C (68°F)4 mm (0.2 inches)72%extreme
July Weather22°C (72°F)3 mm (0.1 inches)73%extreme
August Weather23°C (73°F)2 mm (0.1 inches)69%very high
September Weather22°C (72°F)3 mm (0.1 inches)68%very high
October Weather20°C (69°F)9 mm (0.4 inches)67%high
November Weather17°C (63°F)18 mm (0.7 inches)68%moderate
December Weather14°C (58°F)68 mm (2.7 inches)71%moderate

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