Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
San Ysidro's warmest month, August, generally records average temperatures ranging from a high of 81.1°F (27.3°C) to a low of 66.7°F (19.3°C).Heat index
The heat index value during August is estimated at 84.2°F (29°C). Remaining active during long-lasting exposure could cause fatigue, leading to heat cramps.Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
Humidity
In August, the average relative humidity is 63%.Rainfall
In August, the rain falls for 3.2 days. Throughout August, 0.35" (9mm) of precipitation is accumulated. Throughout the year, there are 57.8 rainfall days, and 7.28" (185mm) of precipitation is accumulated.Daylight
In August, the average length of the day is 13h and 19min.On the first day of August, sunrise is at 6:03 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 6:22 am and sunset at 7:13 pm PDT.
Sunshine
In August, the average sunshine in San Ysidro is 11.9h.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 vulnerability from unsafe exposure to UV radiation for average individuals.Note: An average UV index of 6 in August transforms into this advice:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Enhance your sun protection with tightly woven, yet airy clothing.
Frequently asked questions
What time of the year is the hottest in San Ysidro?
What are the temperatures in San Ysidro in August?
What is the average humidity in August in San Ysidro?
How much does it rain in San Ysidro in August?
How many hours of daylight does San Ysidro have in August?
What time are sunrise and sunset in August in San Ysidro?
How many hours of sunshine does San Ysidro have in August?
When is the highest UV index in San Ysidro?
What is the UV index reading in August in San Ysidro?
Average temperature in August
San Ysidro, CA
- Average high temperature in August: 81.1°F
The warmest month (with the highest average high temperature) is August (81.1°F).
The month with the lowest average high temperature is December (64°F).
- Average low temperature in August: 66.7°F
The month with the highest average low temperature is August (66.7°F).
The coldest month (with the lowest average low temperature) is February (50.2°F).
Average pressure in August
San Ysidro, CA
- Average pressure in August: 29.88"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.88"Hg).
Average wind speed in August
San Ysidro, CA
- Average wind speed in August: 5.1mph
The windiest months (with the highest average wind speed) are April and May (6mph).
The calmest month (with the lowest average wind speed) is October (4.8mph).
Average humidity in August
San Ysidro, CA
- Average humidity in August: 63%
The month with the highest relative humidity is May (68%).
The month with the lowest relative humidity is November (55%).
Average rainfall in August
San Ysidro, CA
- Average rainfall in August: 0.35"
The wettest month (with the highest rainfall) is February (1.5").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in August
San Ysidro, CA
- Average rainfall days in August: 3.2 days
The month with the highest number of rainy days is March (7.5 days).
The month with the least rainy days is June (1.8 days).
Average daylight in August /
Average sunshine in August
San Ysidro, CA
- Average daylight in August: 13h 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 6min).
- Average sunshine in August: 11h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days in August
San Ysidro, CA
- Average sunshine days in August: 24 days
The month with the most sunshine days is June (27.8 days).
The month with the least sunshine days is February (20.8 days).
Average UV index in August
San Ysidro, CA
- Average UV index in August: 6
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in August
San Ysidro, CA
- Average cloud cover in August: 8
The months with the most cloud cover are March and December (Cloud cover 25).
The month with the least cloud cover is August (Cloud cover 8).
Average visibility in August
San Ysidro, CA
- Average visibility in August: 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).
San Ysidro, California, USA
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