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 ushers in a minor alteration in Cottonwood's climate, with the average high-temperature moving from August's 93.9°F (34.4°C) to a still tropical 86.7°F (30.4°C). Cottonwood registers a significant drop in temperature in September, with average nighttime lows of 59.5°F (15.3°C).Humidity
In Cottonwood, the average relative humidity in September is 35%.Rainfall
In September, the rain falls for 3.3 days. Throughout September, 0.28" (7mm) of precipitation is accumulated. Throughout the year, there are 88.3 rainfall days, and 21.5" (546mm) of precipitation is accumulated.Snowfall
In Cottonwood, snow does not fall in January, March through October.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 7:40 pm. On the last day of September, sunrise is at 7:05 am and sunset at 6:52 pm PDT.
Sunshine
In September, the average sunshine is 11.1h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 5 suggests these recommendations:
Heed the precautions - It is counselled to guard against solar damage. The Sun's radiation is especially intense around midday; try to stay in shade during this period. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during 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 Cottonwood have in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Cottonwood, CA
- Average high temperature in September: 86.7°F
The warmest month (with the highest average high temperature) is July (95.2°F).
The month with the lowest average high temperature is December (52.3°F).
- Average low temperature in September: 59.5°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is December (38.3°F).
Average pressure in September
Cottonwood, CA
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).
Average wind speed in September
Cottonwood, CA
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is March (5.6mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in September
Cottonwood, CA
- Average humidity in September: 35%
The month with the highest relative humidity is March (72%).
The month with the lowest relative humidity is August (31%).
Average rainfall in September
Cottonwood, CA
- Average rainfall in September: 0.28"
The wettest month (with the highest rainfall) is March (4.02").
The driest months (with the least rainfall) are July and August (0.08").
Average rainfall days in September
Cottonwood, CA
- Average rainfall days in September: 3.3 days
The month with the highest number of rainy days is March (14.8 days).
The month with the least rainy days is August (1.4 days).
Average snowfall in September
Cottonwood, CA
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.24").
The months with the least snowfall are January, March, April, May, June, July, August, September and October (0").
Average snowfall days in September
Cottonwood, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.3 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Cottonwood, 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 42min).
Average sunshine days in September
Cottonwood, CA
- Average sunshine days in September: 25.9 days
The month with the most sunshine days is July (28.7 days).
The month with the least sunshine days is March (14.6 days).
Average UV index in September
Cottonwood, CA
- Average UV index in September: 5
The months with the highest UV index are June and 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
Cottonwood, CA
- Average cloud cover in September: 8
The month with the most cloud cover is March (Cloud cover 39).
The months with the least cloud cover are July and August (Cloud cover 5).
Average visibility in September
Cottonwood, 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).
Cottonwood, California, USA
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