Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
A subtle change in temperatures is noted as August gives way to September, with average highs reducing from a very hot 97.2°F (36.2°C) to a tropical 90.3°F (32.4°C). Twentynine Palms's average low-temperature in September is measured at a pleasant 72.3°F (22.4°C).Humidity
In Twentynine Palms, the average relative humidity in September is 25%.Rainfall
In Twentynine Palms, in September, during 4.1 rainfall days, 0.28" (7mm) of precipitation is typically accumulated. Throughout the year, there are 42.3 rainfall days, and 4.45" (113mm) of precipitation is accumulated.Snowfall
January, March through December are months without snowfall.Daylight
In September, the average length of the day is 12h and 22min.On the first day of September, sunrise is at 6:18 am and sunset at 7:09 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 6:29 pm PDT.
Sunshine
In September, the average sunshine is 10.4h.UV index
The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 6 suggests this advice:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Twentynine Palms have in September?
What time are sunrise and sunset in September in Twentynine Palms?
How many hours of sunshine does Twentynine Palms have in September?
How high is the UV index in September?
Average temperature in September
Twentynine Palms, CA
- Average high temperature in September: 90.3°F
The warmest month (with the highest average high temperature) is July (98.1°F).
The month with the lowest average high temperature is December (56.5°F).
- Average low temperature in September: 72.3°F
The month with the highest average low temperature is August (78.4°F).
The coldest month (with the lowest average low temperature) is December (42.4°F).
Average pressure in September
Twentynine Palms, CA
- Average pressure in September: 29.83"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.78"Hg).
Average wind speed in September
Twentynine Palms, CA
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is April (8.6mph).
The calmest months (with the lowest average wind speed) are August and September (6.2mph).
Average humidity in September
Twentynine Palms, CA
- Average humidity in September: 25%
The month with the highest relative humidity is December (43%).
The month with the lowest relative humidity is June (20%).
Average rainfall in September
Twentynine Palms, CA
- Average rainfall in September: 0.28"
The wettest month (with the highest rainfall) is July (0.87").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in September
Twentynine Palms, CA
- Average rainfall days in September: 4.1 days
The month with the highest number of rainy days is July (6.9 days).
The month with the least rainy days is June (1.1 days).
Average snowfall in September
Twentynine Palms, CA
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.04").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Twentynine Palms, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.2 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Twentynine Palms, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 10h and 2min
The month with the most sunshine is June (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 7h and 6min).
Average sunshine days in September
Twentynine Palms, CA
- Average sunshine days in September: 24.3 days
The month with the most sunshine days is May (28.7 days).
The month with the least sunshine days is July (20.4 days).
Average UV index in September
Twentynine Palms, CA
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 8).
The months with the lowest UV index are November and December (UV index 3).
Average cloud cover in September
Twentynine Palms, CA
- Average cloud cover in September: 6
The month with the most cloud cover is December (Cloud cover 18).
The month with the least cloud cover is June (Cloud cover 4).
Average visibility in September
Twentynine Palms, CA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Twentynine Palms, California, USA
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