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 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
The shift from August to September is characterized by an average high-temperature of a warm 85.6°F (29.8°C), not significantly different from the 91°F (32.8°C) of August. From significant daily highs, Mountain Ranch's nights in September cool down to an average low-temperature of 57°F (13.9°C).Humidity
The average relative humidity in September is 39%.Rainfall
In Mountain Ranch, in September, it is raining for 3.3 days, with typically 0.2" (5mm) of accumulated precipitation. Throughout the year, there are 73.3 rainfall days, and 16.42" (417mm) of precipitation is accumulated.Daylight
The average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 6:32 am and sunset at 7:31 pm. On the last day of September, sunrise is at 6:57 am and sunset at 6:46 pm PDT.
Sunshine
The average sunshine in September is 11.3h.UV index
In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index of 5 during September leads to these instructions:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in September?
What is the average humidity in September?
How much does it rain in September?
How many hours of daylight does Mountain Ranch have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Mountain Ranch, CA
- Average high temperature in September: 85.6°F
The warmest month (with the highest average high temperature) is July (92.1°F).
The month with the lowest average high temperature is December (53.6°F).
- Average low temperature in September: 57°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is December (37.8°F).
Average pressure in September
Mountain Ranch, CA
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Mountain Ranch, CA
- Average wind speed in September: 4.4mph
The windiest month (with the highest average wind speed) is February (5.6mph).
The calmest months (with the lowest average wind speed) are August and September (4.4mph).
Average humidity in September
Mountain Ranch, CA
- Average humidity in September: 39%
The month with the highest relative humidity is March (72%).
The month with the lowest relative humidity is July (37%).
Average rainfall in September
Mountain Ranch, CA
- Average rainfall in September: 0.2"
The wettest month (with the highest rainfall) is March (3.39").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in September
Mountain Ranch, CA
- Average rainfall days in September: 3.3 days
The month with the highest number of rainy days is March (13.3 days).
The month with the least rainy days is July (1.7 days).
Average daylight in September /
Average sunshine in September
Mountain Ranch, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 11h and 2min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in September
Mountain Ranch, CA
- Average sunshine days in September: 26.4 days
The month with the most sunshine days is July (28.2 days).
The month with the least sunshine days is March (16.9 days).
Average UV index in September
Mountain Ranch, CA
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Mountain Ranch, CA
- Average cloud cover in September: 7
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in September
Mountain Ranch, 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).
Mountain Ranch, California, USA
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