Palm Desert Weather in September
September in Palm Desert brings extremely high temperatures, with highs of 38°C (100°F) and nights dropping to 23°C (73°F). Rainfall is very low this month, averaging just 5.3 mm (0.2 in).
Rainfall in Palm Desert in September
On average, there are about a single day with rain during this month, averaging 5.3 mm (0.2 in). Any rain that does arrive is likely to be fairly light and short-lived.
Temperature in Palm Desert in September
Expect highs of 38°C (100°F) in Palm Desert in September, with nights dropping to around 23°C (73°F). The hottest part of the day is usually in the afternoon, so lighter clothing can help you stay comfortable. Nights stay warm at around 23°C (73°F), so light bedding and good ventilation are worth thinking about.
Average water temperature in September
The water is 20°C (68°F) this month — a comfortable temperature that most swimmers enjoy. Warm enough to stay in without getting cold quickly.If you're looking for dry conditions and comfortable temperatures, September may not be the ideal month to visit Palm Desert. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Palm Desert's climate page.
Palm Desert Temperature in September
Min Temperature
23°C (73°F)
Max Temperature
38°C (100°F)
Water Temperature
20°C (68°F) *
Chance of Rain
3%
Precipitation
5.3 mm (0.2 in)
Rainy days
a single day
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Palm Desert typically drop from around 40°C (104°F) at the start of September to approximately 36°C (97°F) by the end. Nights are warm, with lows typically ranging from 20°C (68°F) to 25°C (77°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Palm Desert in September
Browse day-by-day weather records for Palm Desert spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Palm Desert historical weather extremes in September
Based on weather observations in Palm Desert between 1976 and 2025, these are the recorded extremes during September.
- Palm Desert recorded its highest September temperature of 49°C (120°F) on September 5, 2020.
- The lowest overnight temperature recorded in September was 9°C (48°F) (September 20, 1985).
Best Places in the United States of America in September
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in September →
perfect weather
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tolerable
unpleasant
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What to Wear in Palm Desert in September
Get ready for hot weather in September! Lightweight, breathable fabrics are your best friend during this month. Cotton and linen shirts, shorts, sundresses, and sandals will keep you comfortable. Light colors help reflect the heat, avoid wearing black. Almost no rain is expected, so no need to bring rain gear. The water temperature sits at about 20°C (68°F), making it perfect for swimming and water activities. Don't forget to pack your favorite swimwear and perhaps some snorkel gear.What To Do in Palm Desert in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Palm Desert's climate page.
Temperature Rainfall Water Temp
See the full Palm Desert climate overview or explore weather in the United States of America.
