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
September's onset introduces a mild reduction in the average high-temperature, from 93.6°F (34.2°C) in August to a still tropical 86°F (30°C). Shasta records a marked divergence from the day's high temperatures, with nights in September averaging at a moderate 57.7°F (14.3°C).Humidity
In September, the average relative humidity is 37%.Rainfall
In Shasta, during September, the rain falls for 3.5 days and regularly aggregates up to 0.28" (7mm) of precipitation. Throughout the year, there are 92.2 rainfall days, and 20.16" (512mm) of precipitation is accumulated.Snowfall
January, April through November are months without snowfall.Daylight
The average length of the day in September is 12h and 26min.On the first day of September in Shasta, sunrise is at 6:37 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:53 pm PDT.
Sunshine
In September, the average sunshine is 11.1h.UV index
In Shasta, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 5 during September translates into these guidelines:
Take measures. Individuals with light skin might experience burns in under 30 minutes. When the Sun is at its strongest around midday, find shade and limit exposure. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
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?
When it does not snow?
What is the average length of the day in September?
What time are sunrise and sunset in September in Shasta?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Shasta, CA
- Average high temperature in September: 86°F
The warmest month (with the highest average high temperature) is July (94.6°F).
The month with the lowest average high temperature is December (50.9°F).
- Average low temperature in September: 57.7°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is December (36.7°F).
Average pressure in September
Shasta, CA
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June and August (29.92"Hg).
Average wind speed in September
Shasta, CA
- Average wind speed in September: 4.7mph
The windiest months (with the highest average wind speed) are March and October (5.2mph).
The calmest months (with the lowest average wind speed) are August and November (4.3mph).
Average humidity in September
Shasta, CA
- Average humidity in September: 37%
The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is August (33%).
Average rainfall in September
Shasta, CA
- Average rainfall in September: 0.28"
The wettest month (with the highest rainfall) is March (3.94").
The driest month (with the least rainfall) is July (0.08").
Average rainfall days in September
Shasta, CA
- Average rainfall days in September: 3.5 days
The month with the highest number of rainy days is March (15.8 days).
The month with the least rainy days is August (1.3 days).
Average snowfall in September
Shasta, CA
- Average snowfall in September: 0"
The month with the highest snowfall is December (0.31").
The months with the least snowfall are January, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Shasta, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.5 days).
The months with the least snowfall days are January, April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Shasta, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- 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 30min).
Average sunshine days in September
Shasta, CA
- Average sunshine days in September: 25.5 days
The month with the most sunshine days is August (27.8 days).
The month with the least sunshine days is March (13.5 days).
Average UV index in September
Shasta, CA
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is February (UV index 2).
Average cloud cover in September
Shasta, CA
- Average cloud cover in September: 9
The month with the most cloud cover is March (Cloud cover 42).
The months with the least cloud cover are July and August (Cloud cover 5).
Average visibility in September
Shasta, 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).
Shasta, California, USA
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