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
Yorba Linda's weather, upon September's arrival, documents an average high-temperature of a warm 84.4°F (29.1°C), nearly identical to the prior month. Throughout September nights, Yorba Linda registers an average low-temperature of 64.6°F (18.1°C).Heat index
September's mean heat index is estimated at a tropical 86°F (30°C). Prolonged exposure and physical activity might induce exhaustion, potentially causing heat cramps.Know that the heat index computations account for shaded terrains and slight winds. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', combines both the air temperature and the humidity level to give a perceived human temperature. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Humidity
In Yorba Linda, California, the average relative humidity in September is 54%.Rainfall
In Yorba Linda, in September, it is raining for 2.6 days, with typically 0.16" (4mm) of accumulated precipitation. In Yorba Linda, California, during the entire year, the rain falls for 49 days and collects up to 6.97" (177mm) of precipitation.Daylight
In Yorba Linda, the average length of the day in September is 12h and 22min.On the first day of September, sunrise is at 6:25 am and sunset at 7:16 pm. On the last day of the month, sunrise is at 6:45 am and sunset at 6:36 pm PDT.
Sunshine
In Yorba Linda, the average sunshine in September is 10.6h.UV index
In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 6 in September interprets into the following recommendations:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Frequently asked questions
How hot does it get in Yorba Linda in September?
What is the average humidity in September in Yorba Linda?
How many days does it rain in September in Yorba Linda?
What is the average length of the day in September in Yorba Linda?
When are sunrise and sunset in September in Yorba Linda?
How long on average sun shines in September in Yorba Linda?
How high is the UV index in September in Yorba Linda?
Average temperature in September
Yorba Linda, CA
- Average high temperature in September: 84.4°F
The warmest month (with the highest average high temperature) is August (86.7°F).
The month with the lowest average high temperature is December (64°F).
- Average low temperature in September: 64.6°F
The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is February (48.9°F).
Average pressure in September
Yorba Linda, CA
- Average pressure in September: 29.88"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.88"Hg).
Average wind speed in September
Yorba Linda, CA
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is April (5.7mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).
Average humidity in September
Yorba Linda, CA
- Average humidity in September: 54%
The months with the highest relative humidity are May and June (61%).
The month with the lowest relative humidity is November (49%).
Average rainfall in September
Yorba Linda, CA
- Average rainfall in September: 0.16"
The wettest month (with the highest rainfall) is December (1.54").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in September
Yorba Linda, CA
- Average rainfall days in September: 2.6 days
The month with the highest number of rainy days is March (6.8 days).
The month with the least rainy days is June (1.2 days).
Average daylight in September /
Average sunshine in September
Yorba Linda, 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 4min
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 48min).
Average sunshine days in September
Yorba Linda, CA
- Average sunshine days in September: 24.1 days
The month with the most sunshine days is August (25.9 days).
The month with the least sunshine days is February (21.2 days).
Average UV index in September
Yorba Linda, CA
- Average UV index in September: 6
The month with the highest UV index is August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in September
Yorba Linda, CA
- Average cloud cover in September: 8
The months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in September
Yorba Linda, 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).
Yorba Linda, California, USA
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