September weather forecastMorongo Valley, CA
September
Weather in September
The first month of the autumn, September, is also a hot month in Morongo Valley, California, with temperature in the range of an average high of 86.2°F (30.1°C) and an average low of 66.6°F (19.2°C).Temperature
As September begins, there is a minor decrease in the average high-temperature, softly falling from 92.1°F (33.4°C) in August to a still hot 86.2°F (30.1°C). Morongo Valley's average low-temperature in the month of September is recorded at a refreshing 66.6°F (19.2°C).Humidity
In September, the average relative humidity is 30%.Rainfall
In Morongo Valley, in September, during 2.3 rainfall days, 0.16" (4mm) of precipitation is typically accumulated. Throughout the year, there are 33.5 rainfall days, and 2.83" (72mm) of precipitation is accumulated.Snowfall
January, March through November 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 6:20 am and sunset at 7:11 pm. On the last day of the month, sunrise is at 6:40 am and sunset at 6:31 pm PDT.
Sunshine
In September, the average sunshine is 10.5h.UV index
In Morongo Valley, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: A typical high UV index of 6 in September suggests the following recommendations:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Morongo Valley, CA
- Average high temperature in September: 86.2°F
The warmest month (with the highest average high temperature) is July (92.8°F).
The month with the lowest average high temperature is December (55.9°F).
- Average low temperature in September: 66.6°F
The month with the highest average low temperature is August (70.9°F).
The coldest month (with the lowest average low temperature) is December (41.4°F).
Average pressure in September
Morongo Valley, CA
- Average pressure in September: 29.84"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.81"Hg).
Average wind speed in September
Morongo Valley, CA
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is April (8.9mph).
The calmest month (with the lowest average wind speed) is January (6.5mph).
Average humidity in September
Morongo Valley, CA
- Average humidity in September: 30%
The month with the highest relative humidity is December (47%).
The month with the lowest relative humidity is August (26%).
Average rainfall in September
Morongo Valley, CA
- Average rainfall in September: 0.16"
The wettest month (with the highest rainfall) is December (0.47").
The driest month (with the least rainfall) is June (0").
Average rainfall days in September
Morongo Valley, CA
- Average rainfall days in September: 2.3 days
The months with the highest number of rainy days are July and December (4 days).
The month with the least rainy days is June (0.8 days).
Average snowfall in September
Morongo Valley, CA
- Average snowfall in September: 0"
The month with the highest snowfall is December (0.35").
The months with the least snowfall are January, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Morongo Valley, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.3 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Morongo Valley, 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 months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).
Average sunshine days in September
Morongo Valley, CA
- Average sunshine days in September: 26.6 days
The month with the most sunshine days is October (28.8 days).
The month with the least sunshine days is July (24.5 days).
Average UV index in September
Morongo Valley, CA
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are November and December (UV index 3).
Average cloud cover in September
Morongo Valley, CA
- Average cloud cover in September: 6
The month with the most cloud cover is December (Cloud cover 19).
The month with the least cloud cover is June (Cloud cover 5).
Average visibility in September
Morongo Valley, 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).
