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September Weather in Lake Nacimiento, United States

Last updated: June 24, 2025

In September, the average temperature in Lake Nacimiento, United States is a comfortable 21°C (70°F), perfect for outdoor activities. However, temperatures can fluctuate, with minimums dipping to 9°C (49°F) and maximums soaring up to 39°C (103°F). Fortunately, you can expect dry conditions this month, as precipitation amounts to 0 mm (0.0 in) over 0 days, coupled with an average humidity of 70%.

September Temperature in Lake Nacimiento

In September in Lake Nacimiento, the average temperature is 21°C (70°F). Maximums can reach 39°C (103°F), while minimums can drop as low as 9°C (49°F). Be prepared for a diverse range of temperatures if you're planning to travel during this time.

September Weather in Lake Nacimiento: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Lake Nacimiento, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lake Nacimiento, September typically has an average temperature of 21°C (70°F), with highs reaching up to 39°C (103°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec525254596268707170655752
Data source: Temperature data for Lake Nacimiento 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 Lake Nacimiento

In Lake Nacimiento in September, the precipitation amount is 0 mm (0.0 in) during 0 days.

September Precipitation Trends in Lake Nacimiento

The chart displays monthly precipitation patterns in Lake Nacimiento, 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 Lake Nacimiento, September typically receives around 0 mm (0.0 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec114788624110000102972
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Lake Nacimiento

In Lake Nacimiento in September, humidity is 70%. With an average temperature of 21°C (70°F), this humidity feels like a warm, muggy embrace, making travel slightly uncomfortable, as the air clings to your skin and can leave you feeling sticky and in need of frequent breaks to cool down.

September Average Humidity in Lake Nacimiento

This chart illustrates the average monthly humidity levels in Lake Nacimiento, 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 Lake Nacimiento is approximately 70%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%83%80%76%75%74%75%72%70%70%74%77%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Lake Nacimiento

In Lake Nacimiento in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Lake Nacimiento.

Maximum UV Index Levels in Lake Nacimiento for September

The chart shows the monthly maximum UV Index (UVI) for Lake Nacimiento 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 Lake Nacimiento typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec4589111211119753
Data source: Lake Nacimiento 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 Lake Nacimiento Compares to Other Months

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

This table compares monthly weather conditions in Lake Nacimiento, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (52°F)114 mm (4.5 inches)80%moderate
February Weather11°C (52°F)78 mm (3.1 inches)83%moderate
March Weather12°C (54°F)86 mm (3.4 inches)80%very high
April Weather15°C (59°F)24 mm (0.9 inches)76%very high
May Weather17°C (63°F)11 mm (0.4 inches)75%extreme
June Weather20°C (68°F)0 mm (0.0 inches)74%extreme
July Weather21°C (71°F)0 mm (0.0 inches)75%extreme
August Weather22°C (71°F)0 mm (0.0 inches)72%extreme
September Weather21°C (70°F)0 mm (0.0 inches)70%very high
October Weather18°C (65°F)10 mm (0.4 inches)70%high
November Weather14°C (58°F)29 mm (1.2 inches)74%moderate
December Weather11°C (52°F)72 mm (2.8 inches)76%moderate

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