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
The onset of September notes an average high-temperature of a warm 84.4°F (29.1°C), subtly shifted from August's 88.7°F (31.5°C). September nights report a substantial dip from daytime highs to an average of 61.2°F (16.2°C).Heat index
The heat index value for September is evaluated at 84.2°F (29°C). Uninterrupted exposure and activity might result in fatigue, potentially causing heat cramps.It is crucial to understand that heat index figures are for shade and gentle wind conditions. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are quite important for children. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
Humidity
In Cherry Valley, California, the average relative humidity in September is 40%.Rainfall
In Cherry Valley, California, during September, the rain falls for 2.7 days and regularly aggregates up to 0.16" (4mm) of precipitation. In Cherry Valley, during the entire year, the rain falls for 47.7 days and collects up to 6.69" (170mm) of precipitation.Snowfall
In Cherry Valley, snow does not fall in January, April through October.Daylight
In September, the average length of the day is 12h and 22min.On the first day of the month, sunrise is at 6:22 am and sunset at 7:13 pm. On the last day of September, in Cherry Valley, sunrise is at 6:42 am and sunset at 6:33 pm PDT.
Sunshine
In September, the average sunshine is 10.5h.UV index
In Cherry Valley, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The UV index of 5 in September translates into these instructions:
Exercise care. People with light skin might get burns in fewer than 30 minutes. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Stay sun-safe with clothing that is both closely woven and worn loosely.
Frequently asked questions
How hot is it in Cherry Valley in September?
What is the average humidity in September in Cherry Valley?
How many days does it rain in September in Cherry Valley?
When it does not snow in Cherry Valley?
What is the average length of the day in September in Cherry Valley?
When is the sunrise / sunset in September in Cherry Valley?
How many hours of sunshine does Cherry Valley have in September?
What is the UV index reading in September in Cherry Valley?
Average temperature in September
Cherry Valley, CA
- Average high temperature in September: 84.4°F
The warmest month (with the highest average high temperature) is August (88.7°F).
The month with the lowest average high temperature is December (56.5°F).
- Average low temperature in September: 61.2°F
The month with the highest average low temperature is August (64.2°F).
The coldest month (with the lowest average low temperature) is December (40.1°F).
Average pressure in September
Cherry Valley, CA
- Average pressure in September: 29.86"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in September
Cherry Valley, CA
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is April (6.8mph).
The calmest month (with the lowest average wind speed) is September (5.2mph).
Average humidity in September
Cherry Valley, CA
- Average humidity in September: 40%
The month with the highest relative humidity is February (54%).
The month with the lowest relative humidity is August (37%).
Average rainfall in September
Cherry Valley, CA
- Average rainfall in September: 0.16"
The wettest month (with the highest rainfall) is February (1.38").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in September
Cherry Valley, CA
- Average rainfall days in September: 2.7 days
The month with the highest number of rainy days is December (5.9 days).
The month with the least rainy days is June (1.2 days).
Average snowfall in September
Cherry Valley, CA
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.83").
The months with the least snowfall are January, April, May, June, July, August, September and October (0").
Average snowfall days in September
Cherry Valley, CA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are January, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Cherry Valley, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 10h and 3min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in September
Cherry Valley, CA
- Average sunshine days in September: 25.1 days
The month with the most sunshine days is June (28.4 days).
The month with the least sunshine days is February (21.8 days).
Average UV index in September
Cherry Valley, CA
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are February, November and December (UV index 3).
Average cloud cover in September
Cherry Valley, CA
- Average cloud cover in September: 7
The month with the most cloud cover is December (Cloud cover 25).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in September
Cherry 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).
Cherry Valley, California, USA
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