nomadseason

September Weather in Palos Altos, Mexico

Last updated: August 27, 2025

In Palos Altos, Mexico, the average temperature in September hovers around 26°C (79°F), with daily highs reaching up to 33°C (92°F) and lows dipping to 20°C (68°F). This month experiences significant precipitation, with an average of 282 mm (11.1 in) falling over 25 days, resulting in a notably high average humidity of 85%.

September Temperature in Palos Altos

In September in Palos Altos, the average temperature is 26°C (79°F), with maximums reaching up to 33°C (92°F) and minimums dropping as low as 20°C (68°F). This pleasant climate makes it an ideal time for travelers to explore and enjoy outdoor activities.

September Weather in Palos Altos: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Palos Altos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Palos Altos, September typically has an average temperature of 26°C (79°F), with highs reaching up to 33°C (92°F) and lows dropping to around 20°C (68°F).
JanFebMarAprMayJunJulAugSepOctNovDec778084868781797978787776
Data source: Temperature data for Palos Altos generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Palos Altos

In Palos Altos in September, the precipitation amount is 282 mm (11.1 in) over the course of 25 days.

September Precipitation Trends in Palos Altos

The chart displays monthly precipitation patterns in Palos Altos, 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 Palos Altos, September typically receives around 282 mm (11.1 inches) of precipitation spread over approximately 25 days.
JanFebMarAprMayJunJulAugSepOctNovDec120126197240288282198252
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Palos Altos

In Palos Altos in September, humidity is 85%. With an average temperature of 26°C (79°F), this humidity feels like a heavy blanket enveloping you, making outdoor activities feel stifling and exhausting for travelers.

September Average Humidity in Palos Altos

This chart illustrates the average monthly humidity levels in Palos Altos, 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 Palos Altos is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec70%64%54%61%75%83%83%85%85%79%76%75%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Palos Altos

In Palos Altos in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Palos Altos.

Maximum UV Index Levels in Palos Altos for September

The chart shows the monthly maximum UV Index (UVI) for Palos Altos 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 Palos Altos typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911131313141413131188
Data source: Palos Altos 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 Palos Altos Compares to Other Months

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

This table compares monthly weather conditions in Palos Altos, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (78°F)1 mm (0.0 inches)70%very high
February Weather27°C (81°F)2 mm (0.1 inches)64%extreme
March Weather29°C (84°F)0 mm (0.0 inches)54%extreme
April Weather30°C (86°F)1 mm (0.0 inches)61%extreme
May Weather30°C (87°F)25 mm (1.0 inches)75%extreme
June Weather27°C (82°F)197 mm (7.7 inches)83%extreme
July Weather26°C (80°F)240 mm (9.4 inches)83%extreme
August Weather26°C (79°F)288 mm (11.3 inches)85%extreme
September Weather26°C (79°F)282 mm (11.1 inches)85%extreme
October Weather26°C (78°F)198 mm (7.8 inches)79%extreme
November Weather25°C (77°F)25 mm (1.0 inches)76%very high
December Weather24°C (76°F)2 mm (0.1 inches)74%very high

Compare Palos Altos's Climate with Cities Worldwide