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
The shift from August to September includes a small decrease in the average high-temperature, from a warm 85.3°F (29.6°C) to a still moderately hot 79.3°F (26.3°C). Despite considerable daily temperature swings, a steady low-temperature average of 54.5°F (12.5°C) is noted throughout September.Humidity
In Squirrel Mountain Valley, the average relative humidity in September is 35%.Rainfall
In September, the rain falls for 3.4 days. Throughout September, 0.24" (6mm) of precipitation is accumulated. Throughout the year, there are 65.1 rainfall days, and 12.28" (312mm) of precipitation is accumulated.Snowfall
June through October are months without snowfall.Daylight
In Squirrel Mountain Valley, the average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:26 am and sunset at 7:20 pm. On the last day of September, sunrise is at 6:48 am and sunset at 6:38 pm PDT.
Sunshine
The average sunshine in September is 10.9h.UV index
In Squirrel Mountain Valley, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 5 transforms into these recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures 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 Squirrel Mountain Valley have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Squirrel Mountain Valley have in September?
What is the UV index reading in September?
Average temperature in September
Squirrel Mountain Valley, CA
- Average high temperature in September: 79.3°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is December (49.3°F).
- Average low temperature in September: 54.5°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is December (32.4°F).
Average pressure in September
Squirrel Mountain Valley, CA
- Average pressure in September: 29.89"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Squirrel Mountain Valley, CA
- Average wind speed in September: 5.4mph
The windiest month (with the highest average wind speed) is May (7.4mph).
The calmest month (with the lowest average wind speed) is September (5.4mph).
Average humidity in September
Squirrel Mountain Valley, CA
- Average humidity in September: 35%
The month with the highest relative humidity is February (61%).
The month with the lowest relative humidity is August (31%).
Average rainfall in September
Squirrel Mountain Valley, CA
- Average rainfall in September: 0.24"
The wettest month (with the highest rainfall) is January (2.24").
The driest month (with the least rainfall) is June (0.2").
Average rainfall days in September
Squirrel Mountain Valley, CA
- Average rainfall days in September: 3.4 days
The month with the highest number of rainy days is March (10.1 days).
The month with the least rainy days is June (1.5 days).
Average snowfall in September
Squirrel Mountain Valley, CA
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.98").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Squirrel Mountain Valley, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.7 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Squirrel Mountain Valley, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 10h and 5min
The months with the most sunshine are June and July (Average sunshine: 12h and 0min).
The months with the least sunshine are January and February (Average sunshine: 6h and 24min).
Average sunshine days in September
Squirrel Mountain Valley, CA
- Average sunshine days in September: 25.9 days
The month with the most sunshine days is June (27.4 days).
The month with the least sunshine days is February (19.2 days).
Average UV index in September
Squirrel Mountain Valley, CA
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are November and December (UV index 2).
Average cloud cover in September
Squirrel Mountain Valley, CA
- Average cloud cover in September: 6
The month with the most cloud cover is March (Cloud cover 31).
The months with the least cloud cover are August and September (Cloud cover 6).
Average visibility in September
Squirrel Mountain 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).
Squirrel Mountain Valley, California, USA
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