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
Crest notes an average high-temperature of a still moderately hot 83.3°F (28.5°C) in September, displaying minor variation from August. September brings Crest a consistent average low-temperature of 63.5°F (17.5°C).Heat index
For most parts of September, the heat index is evaluated at a hot 86°F (30°C). Persistent activity under exposure might lead to a feeling of weariness, with subsequent heat cramps.When referencing the heat index, its values are suitable for shady environments and light breezes. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is an aggregate value of air's warmth and moisture to show the human-felt temperature. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
Humidity
In Crest, California, the average relative humidity in September is 57%.Rainfall
In Crest, in September, it is raining for 3.9 days, with typically 0.31" (8mm) of accumulated precipitation. Throughout the year, in Crest, there are 49.6 rainfall days, and 5.16" (131mm) of precipitation is accumulated.Daylight
In September, the average length of the day in Crest is 12h and 22min.On the first day of the month, sunrise is at 6:22 am and sunset at 7:11 pm. On the last day of September, sunrise is at 6:41 am and sunset at 6:32 pm PDT.
Sunshine
The average sunshine in September is 10.4h.UV index
The months with the highest UV index are June through September, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for average individuals.Note: A daily maximum UV index of 6 in September translates into the following instructions:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Experience reduced UV exposure by about half when donning a wide-brim hat.
Frequently asked questions
How hot is September in Crest?
What is the average humidity in September in Crest?
How much does it rain in Crest in September?
How many hours of daylight does Crest have in September?
When are sunrise and sunset in September in Crest?
How many hours of sunshine does Crest have in September?
What are the months with the highest UV index in Crest?
What is the UV index intensity in September in Crest?
Average temperature in September
Crest, CA
- Average high temperature in September: 83.3°F
The warmest month (with the highest average high temperature) is August (85.5°F).
The month with the lowest average high temperature is December (63.7°F).
- Average low temperature in September: 63.5°F
The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (46°F).
Average pressure in September
Crest, CA
- Average pressure in September: 29.87"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Crest, CA
- Average wind speed in September: 4.2mph
The windiest months (with the highest average wind speed) are April and May (5.3mph).
The calmest months (with the lowest average wind speed) are August, September and October (4.2mph).
Average humidity in September
Crest, CA
- Average humidity in September: 57%
The month with the highest relative humidity is May (65%).
The month with the lowest relative humidity is November (52%).
Average rainfall in September
Crest, CA
- Average rainfall in September: 0.31"
The wettest month (with the highest rainfall) is February (1.06").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in September
Crest, CA
- Average rainfall days in September: 3.9 days
The month with the highest number of rainy days is March (6.8 days).
The month with the least rainy days is June (1.4 days).
Average daylight in September /
Average sunshine in September
Crest, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 10h and 2min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in September
Crest, CA
- Average sunshine days in September: 23.1 days
The month with the most sunshine days is June (28 days).
The month with the least sunshine days is July (20.7 days).
Average UV index in September
Crest, CA
- Average UV index in September: 6
The months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Crest, CA
- Average cloud cover in September: 9
The months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in September
Crest, 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).
Crest, California, USA
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