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 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 heralds a minor drop in average high-temperature, sliding from August's torrid 97.9°F (36.6°C) to a hot 92.3°F (33.5°C). September nights are characterized by a significant departure from the daytime highs, dropping to an average temperature of 62.2°F (16.8°C).Humidity
In September, the average relative humidity in Catheys Valley is 36%.Rainfall
In September, in Catheys Valley, the rain falls for 2.5 days. Throughout September, 0.12" (3mm) of precipitation is accumulated. Throughout the year, there are 62.9 rainfall days, and 11.69" (297mm) of precipitation is accumulated.Daylight
The average length of the day in September is 12h and 25min.On the first day of September in Catheys Valley, sunrise is at 6:31 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:44 pm PDT.
Sunshine
In Catheys Valley, the average sunshine in September is 11.4h.UV index
In Catheys Valley, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the ordinary person.Note: A maximum daily UV index of 6 during September morphs into the following directions:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Catheys Valley in September?
What is the average humidity in September in Catheys Valley?
How many days does it rain in September in Catheys Valley?
What is the average length of the day in September in Catheys Valley?
When are sunrise and sunset in September in Catheys Valley?
How long on average sun shines in September in Catheys Valley?
How high is the UV index in September in Catheys Valley?
Average temperature in September
Catheys Valley, CA
- Average high temperature in September: 92.3°F
The warmest month (with the highest average high temperature) is July (99.1°F).
The month with the lowest average high temperature is December (55.9°F).
- Average low temperature in September: 62.2°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is December (41.9°F).
Average pressure in September
Catheys Valley, CA
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Catheys Valley, CA
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is June (8.3mph).
The calmest months (with the lowest average wind speed) are January and November (5.2mph).
Average humidity in September
Catheys Valley, CA
- Average humidity in September: 36%
The month with the highest relative humidity is January (70%).
The month with the lowest relative humidity is July (32%).
Average rainfall in September
Catheys Valley, CA
- Average rainfall in September: 0.12"
The wettest month (with the highest rainfall) is March (2.44").
The driest month (with the least rainfall) is August (0.04").
Average rainfall days in September
Catheys Valley, CA
- Average rainfall days in September: 2.5 days
The month with the highest number of rainy days is March (11.3 days).
The month with the least rainy days is June (1.1 days).
Average daylight in September /
Average sunshine in September
Catheys Valley, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 11h and 2min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 6min).
Average sunshine days in September
Catheys Valley, CA
- Average sunshine days in September: 27.1 days
The month with the most sunshine days is August (28.8 days).
The month with the least sunshine days is March (18.8 days).
Average UV index in September
Catheys Valley, CA
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Catheys Valley, CA
- Average cloud cover in September: 6
The month with the most cloud cover is March (Cloud cover 32).
The months with the least cloud cover are July and August (Cloud cover 5).
Average visibility in September
Catheys 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).
Catheys Valley, California, USA
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