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
Alpine Meadows's transition into September involves a gentle shift in temperature, receding from a warm 77°F (25°C) in August to a pleasant 70.7°F (21.5°C). A steep decline to a frosty 44.2°F (6.8°C) characterizes the September nights.Humidity
In Alpine Meadows, the average relative humidity in September is 45%.Rainfall
In Alpine Meadows, California, in September, during 4.1 rainfall days, 0.39" (10mm) of precipitation is typically accumulated. Throughout the year, in Alpine Meadows, there are 62.8 rainfall days, and 20.47" (520mm) of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall. September is the first month it typically snows in Alpine Meadows, California. Throughout September, in the average 0.8 snowfall days, it receives 0.79" (20mm) of snow. Throughout the year, there are 75.2 snowfall days, and 112.83" (2866mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 26min.On the first day of September, sunrise is at 6:30 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:44 pm PDT.
Sunshine
In Alpine Meadows, the average sunshine in September is 11.2h.UV index
In Alpine Meadows, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the maximum UV index of 3 suggests these recommendations:
Put precautions into practice - Guidance to elude sunburn is provided. Direct Sun exposure should be minimized especially during midday when radiation is most intense. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Frequently asked questions
What are September temperatures in Alpine Meadows?
What is the average humidity in September in Alpine Meadows?
How many days does it rain in September in Alpine Meadows?
When does it start snowing in Alpine Meadows?
What is the average length of the day in September in Alpine Meadows?
What time are sunrise and sunset in September in Alpine Meadows?
How many hours of sunshine does Alpine Meadows have in September?
What is the UV index reading in September in Alpine Meadows?
Average temperature in September
Alpine Meadows, CA
- Average high temperature in September: 70.7°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is December (37.2°F).
- Average low temperature in September: 44.2°F
The month with the highest average low temperature is July (48.7°F).
The coldest month (with the lowest average low temperature) is December (22.5°F).
Average pressure in September
Alpine Meadows, CA
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Alpine Meadows, CA
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is March (6.7mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in September
Alpine Meadows, CA
- Average humidity in September: 45%
The month with the highest relative humidity is March (81%).
The months with the lowest relative humidity are July and August (40%).
Average rainfall in September
Alpine Meadows, CA
- Average rainfall in September: 0.39"
The wettest month (with the highest rainfall) is March (3.7").
The driest month (with the least rainfall) is August (0.24").
Average rainfall days in September
Alpine Meadows, CA
- Average rainfall days in September: 4.1 days
The month with the highest number of rainy days is May (10.1 days).
The month with the least rainy days is February (3.4 days).
Average snowfall in September
Alpine Meadows, CA
- Average snowfall in September: 0.79"
The month with the highest snowfall is March (25.98").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Alpine Meadows, CA
- Average snowfall days in September: 0.8 days
The month with the highest number of snowfall days is March (14.8 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Alpine Meadows, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 11h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in September
Alpine Meadows, CA
- Average sunshine days in September: 25.1 days
The month with the most sunshine days is October (25.4 days).
The month with the least sunshine days is March (14 days).
Average UV index in September
Alpine Meadows, CA
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Alpine Meadows, CA
- Average cloud cover in September: 9
The month with the most cloud cover is March (Cloud cover 40).
The months with the least cloud cover are July and August (Cloud cover 7).
Average visibility in September
Alpine Meadows, CA
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Alpine Meadows, California, USA
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