July weather forecast
El Cajon, CA

July marks the zenith of summer in El Cajon, with temperatures reaching their annual peak. With the absence of rainfall and high sunshine hours, watersports and sunbathing activities are quite prevalent. Evenings are balmy, making it enjoyable to wander around the City or dine al fresco in the pleasant weather. It's of note that July showcases the lowest wind speed of 4.7mph (7.6km/h), ensuring extended calm periods. Simultaneously, temperatures can climb as high as 81.7°F (27.6°C) while maintaining a comfortable low of 63.9°F (17.7°C), making it the warmest month of the year.

Temperature

The commencement of July introduces an average high-temperature of a still moderately hot 81.7°F (27.6°C), closely mirroring the preceding month. During the month of July, an average temperature of 63.9°F (17.7°C) is noted during the nights.

Heat index

July's mean heat index is computed to be 84.2°F (29°C). With extended exposure and activity, one might feel exhausted and experience heat cramps.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', gives a temperature feeling by integrating air temperature and humidity. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.

Humidity

In July, the average relative humidity is 62%.

Rainfall

In El Cajon, in July, it is raining for 4.9 days, with typically 0.39" (10mm) of accumulated precipitation. Throughout the year, there are 56.1 rainfall days, and 8.27" (210mm) of precipitation is accumulated.

Daylight

In July, the average length of the day is 14h and 4min.
On the first day of the month, sunrise is at 5:43 am and sunset at 8:00 pm. On the last day of July, sunrise is at 6:01 am and sunset at 7:46 pm PDT.

Sunshine

July has the most sunshine of the year, with an average of 12.1h of sunshine.

UV index

The months with the highest UV index are June through September, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.
Note: A maximum high daily UV index of 6 during July translates into the following directions:
Fend off overexposure. Sun protection is vital. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.