September weather forecastFort Rosecrans, CA
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Fort Rosecrans, California, with an average temperature varying between 65.3°F (18.5°C) and 75.2°F (24°C).Temperature
The transition from August to September sees average high-temperatures adjusting to a still moderately hot 75.2°F (24°C), from a not significantly different 75.6°F (24.2°C). Fort Rosecrans experiences a consistent average temperature of 65.3°F (18.5°C) throughout the nights in September.Humidity
In Fort Rosecrans, the average relative humidity in September is 70%.Rainfall
In Fort Rosecrans, in September, during 3.7 rainfall days, 0.31" (8mm) of precipitation is typically accumulated. In Fort Rosecrans, during the entire year, the rain falls for 64.5 days and collects up to 9.02" (229mm) of precipitation.Daylight
The average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:24 am and sunset at 7:13 pm. On the last day of September, sunrise is at 6:42 am and sunset at 6:34 pm PDT.
Sunshine
In Fort Rosecrans, the average sunshine in September is 10.3h.UV index
The months with the highest UV index are July through September, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum daily UV index of 6 during September morphs into the following directions:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Fort Rosecrans, CA
- Average high temperature in September: 75.2°F
The warmest month (with the highest average high temperature) is August (75.6°F).
The months with the lowest average high temperature are February and December (63°F).
- Average low temperature in September: 65.3°F
The month with the highest average low temperature is August (65.5°F).
The coldest month (with the lowest average low temperature) is February (53.1°F).
Average pressure in September
Fort Rosecrans, CA
- Average pressure in September: 29.88"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are June and September (29.88"Hg).
Average wind speed in September
Fort Rosecrans, CA
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is April (6.7mph).
The calmest month (with the lowest average wind speed) is October (5.5mph).
Average humidity in September
Fort Rosecrans, CA
- Average humidity in September: 70%
The month with the highest relative humidity is June (76%).
The months with the lowest relative humidity are January and November (61%).
Average rainfall in September
Fort Rosecrans, CA
- Average rainfall in September: 0.31"
The wettest month (with the highest rainfall) is December (1.81").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in September
Fort Rosecrans, CA
- Average rainfall days in September: 3.7 days
The month with the highest number of rainy days is March (8.4 days).
The month with the least rainy days is June (2.8 days).
Average daylight in September /
Average sunshine in September
Fort Rosecrans, CA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 10h and 18min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in September
Fort Rosecrans, CA
- Average sunshine days in September: 23.9 days
The month with the most sunshine days is August (24.8 days).
The month with the least sunshine days is February (20.1 days).
Average UV index in September
Fort Rosecrans, CA
- Average UV index in September: 6
The months with the highest UV index are July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in September
Fort Rosecrans, CA
- Average cloud cover in September: 12
The months with the most cloud cover are March, May and December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 9).
Average visibility in September
Fort Rosecrans, 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).
