September weather forecast
Death Valley National Park, CA

As Death Valley National Park steps into September, relief from the searing summer heat begins to materialize. While the daytime temperatures remain high at 106.5°F (41.4°C), it's a considerable decline from the peak summer heights. The UV index also drops down, indicating a decrease in the intensity of the sun's rays. A nominal presence of rainfall characterizes September weather. The gradual departure from the extreme summer heat suggests a transition towards the milder autumn season.

Temperature

September's onset in Death Valley National Park corresponds with a subtle shift in the average high-temperature, slightly moving from a burning hot 114.6°F (45.9°C) in August to an extremely hot 106.5°F (41.4°C). Throughout September, Death Valley National Park braces for a considerable drop from daytime highs, with an average low-temperature of 75.6°F (24.2°C).

Rainfall

In Death Valley National Park, California, in September, it is raining for 1 days, with typically 0.2" (5mm) of accumulated precipitation. In Death Valley National Park, during the entire year, the rain falls for 20 days and collects up to 2.36" (60mm) of precipitation.

Daylight

In September, the average length of the day is 12h and 24min.
On the first day of September, sunrise is at 6:20 am and sunset at 7:15 pm. On the last day of the month, sunrise is at 6:43 am and sunset at 6:32 pm PDT.

Sunshine

In Death Valley National Park, the average sunshine in September is 11h.

UV index

The average daily maximum UV index in September is 8. A UV Index of 8 to 10 symbolizes a very high threat to health from exposure to the Sun's UV radiation for the average person.
Note: A typical high UV index of 8 in September suggests the following recommendations:
Be proactive in protecting yourself; skin and eyes can be harmed if left unprotected. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.