September weather forecastJoshua Tree, CA
September
Weather in September
September, the first month of the autumn in Joshua Tree, is still a tropical month, with an average temperature ranging between max 88°F (31.1°C) and min 70°F (21.1°C).Temperature
The arrival of September corresponds with a minor reduction in the average high-temperature, down from August's tropical 94.3°F (34.6°C) to a still hot 88°F (31.1°C). September's nights observe an average temperature of 70°F (21.1°C).Humidity
The average relative humidity in September is 27%.Rainfall
In September, in Joshua Tree, the rain falls for 4.7 days. Throughout September, 0.35" (9mm) of precipitation is accumulated. Throughout the year, in Joshua Tree, there are 41.7 rainfall days, and 4.72" (120mm) of precipitation is accumulated.Snowfall
March through November are months without snowfall in Joshua Tree, California.Daylight
In Joshua Tree, the average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:19 am and sunset at 7:10 pm. On the last day of September, in Joshua Tree, sunrise is at 6:39 am and sunset at 6:30 pm PDT.
Sunshine
In September, the average sunshine is 10.5h.UV index
In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum high daily UV index of 6 during September translates into the following directions:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Joshua Tree, CA
- Average high temperature in September: 88°F
The warmest month (with the highest average high temperature) is July (95°F).
The month with the lowest average high temperature is December (55.6°F).
- Average low temperature in September: 70°F
The month with the highest average low temperature is August (75.7°F).
The coldest month (with the lowest average low temperature) is December (41.9°F).
Average pressure in September
Joshua Tree, 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 (29.79"Hg).
Average wind speed in September
Joshua Tree, CA
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is April (8.9mph).
The calmest month (with the lowest average wind speed) is November (6.4mph).
Average humidity in September
Joshua Tree, CA
- Average humidity in September: 27%
The month with the highest relative humidity is December (45%).
The month with the lowest relative humidity is June (23%).
Average rainfall in September
Joshua Tree, CA
- Average rainfall in September: 0.35"
The wettest month (with the highest rainfall) is July (0.91").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in September
Joshua Tree, CA
- Average rainfall days in September: 4.7 days
The month with the highest number of rainy days is July (7.2 days).
The month with the least rainy days is June (1.4 days).
Average snowfall in September
Joshua Tree, CA
- Average snowfall in September: 0"
The month with the highest snowfall is December (1.06").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Joshua Tree, CA
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are February and December (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Joshua Tree, CA
- Average daylight in September: 12h and 24min
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 30min
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
Joshua Tree, CA
- Average sunshine days in September: 23.4 days
The month with the most sunshine days is May (28.4 days).
The month with the least sunshine days is July (19.6 days).
Average UV index in September
Joshua Tree, CA
- Average UV index in September: 6
The month with the highest UV index is June (UV index 8).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Joshua Tree, 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
Joshua Tree, 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).
