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
With the arrival of September, Valley Wells notices a mild change in the average high-temperature, sliding from August's 93.7°F (34.3°C) to a still tropical 86.5°F (30.3°C). The temperature lowers to an average of 65.5°F (18.6°C) during September nights.Humidity
In Valley Wells, the average relative humidity in September is 23%.Rainfall
In Valley Wells, during September, the rain falls for 2.1 days and regularly aggregates up to 0.16" (4mm) of precipitation. In Valley Wells, during the entire year, the rain falls for 34.1 days and collects up to 2.64" (67mm) of precipitation.Snowfall
February through October and December are months without snowfall.Daylight
In September, the average length of the day is 12h and 23min.On the first day of September in Valley Wells, sunrise is at 6:21 am and sunset at 7:16 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 6:33 pm PDT.
Sunshine
The average sunshine in September is 10.8h.UV index
The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the average person.Note: In September, a daily maximum UV index of 6 leads to the following instructions:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
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?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September in Valley Wells?
Average temperature in September
Valley Wells, CA
- Average high temperature in September: 86.5°F
The warmest month (with the highest average high temperature) is July (95°F).
The month with the lowest average high temperature is December (52°F).
- Average low temperature in September: 65.5°F
The month with the highest average low temperature is July (72.1°F).
The coldest month (with the lowest average low temperature) is December (37°F).
Average pressure in September
Valley Wells, CA
- Average pressure in September: 29.87"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.82"Hg).
Average wind speed in September
Valley Wells, CA
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is May (9.1mph).
The calmest month (with the lowest average wind speed) is January (5.7mph).
Average humidity in September
Valley Wells, CA
- Average humidity in September: 23%
The months with the highest relative humidity are January and December (47%).
The month with the lowest relative humidity is August (20%).
Average rainfall in September
Valley Wells, CA
- Average rainfall in September: 0.16"
The wettest month (with the highest rainfall) is January (0.35").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in September
Valley Wells, CA
- Average rainfall days in September: 2.1 days
The month with the highest number of rainy days is March (4.3 days).
The month with the least rainy days is June (1.3 days).
Average snowfall in September
Valley Wells, CA
- Average snowfall in September: 0"
The month with the highest snowfall is November (0.16").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and December (0").
Average snowfall days in September
Valley Wells, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Valley Wells, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 10h and 5min
The month with the most sunshine is June (Average sunshine: 12h and 12min).
The months with the least sunshine are January and December (Average sunshine: 7h and 6min).
Average sunshine days in September
Valley Wells, CA
- Average sunshine days in September: 26 days
The month with the most sunshine days is December (28.1 days).
The month with the least sunshine days is July (23.6 days).
Average UV index in September
Valley Wells, CA
- Average UV index in September: 6
The month with the highest UV index is July (UV index 8).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Valley Wells, CA
- Average cloud cover in September: 5
The months with the most cloud cover are January, March and December (Cloud cover 17).
The months with the least cloud cover are June, August and September (Cloud cover 5).
Average visibility in September
Valley Wells, 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).
Valley Wells, California, USA
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