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
September
Weather in September
Temperature
Redding's transition into September involves a gentle shift in temperature, receding from a tropical 34.2°C in August to a still hot 30°C. Redding registers a significant reduction from the day's heat, with an average temperature drop to a moderate 14.3°C in September.Humidity
In Redding, the average relative humidity in September is 37%.Rainfall
In Redding, California, in September, it is raining for 3.5 days, with typically 7mm of accumulated precipitation. Throughout the year, there are 92.2 rainfall days, and 512mm of precipitation is accumulated.Snowfall
January, April through November are months without snowfall.Daylight
In September, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 6:37 am and sunset at 7:41 pm. On the last day of September, sunrise is at 7:05 am and sunset at 6:52 pm PDT.
Sunshine
The average sunshine in September is 11.1h.UV index
In Redding, California, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: An average maximum UV index of 5 in September leads to these recommendations:
Undertake protective steps - Preventing sun damage is advised. Around midday, solar radiation is most harmful; hence, exposure should be limited. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow in Redding?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Redding, CA
- Average high temperature in September: 30°C
The warmest month (with the highest average high temperature) is July (34.8°C).
The month with the lowest average high temperature is December (10.5°C).
- Average low temperature in September: 14.3°C
The month with the highest average low temperature is July (16.9°C).
The coldest month (with the lowest average low temperature) is December (2.6°C).
Average pressure in September
Redding, CA
- Average pressure in September: 1013.8mbar
The month with the highest atmospheric pressure is January (1021.5mbar).
The months with the lowest atmospheric pressure are June and August (1013.2mbar).
Average wind speed in September
Redding, CA
- Average wind speed in September: 7.6km/h
The windiest month (with the highest average wind speed) is March (8.4km/h).
The calmest months (with the lowest average wind speed) are August and November (7km/h).
Average humidity in September
Redding, 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
Redding, CA
- Average rainfall in September: 7mm
The wettest month (with the highest rainfall) is March (100mm).
The driest month (with the least rainfall) is July (2mm).
Average rainfall days in September
Redding, 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
Redding, CA
- Average snowfall in September: 0mm
The month with the highest snowfall is December (8mm).
The months with the least snowfall are January, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Redding, 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
Redding, 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
Redding, 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
Redding, 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
Redding, 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
Redding, CA
- Average visibility in September: 10km
The months with the highest visibility are May, June, July, August, September and October (10km).
The months with the lowest visibility are January, February, March, April, November and December (9km).