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

El Cajon registers an average high-temperature of a still warm 81.7°F (27.6°C) at the commencement of July, closely related to the preceding month. During July, El Cajon's temperature falls to a steady low-temperature average of 63.9°F (17.7°C).

Heat index

For most parts of July, the heat index is calculated to be 84.2°F (29°C). With sustained exposure and activity, exhaustion becomes probable, resulting in heat cramps.
Note that heat index values are valued for light wind and location in the shade. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'real feel' or 'feels like', is an estimation of the warmth sensation when considering humidity levels. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.

Humidity

In July, the average relative humidity in El Cajon, California, is 62%.

Rainfall

In El Cajon, during July, the rain falls for 4.9 days and regularly aggregates up to 0.39" (10mm) of precipitation. In El Cajon, during the entire year, the rain falls for 56.1 days and collects up to 8.27" (210mm) of precipitation.

Daylight

In El Cajon, the average length of the day in July 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, in El Cajon, sunrise is at 6:01 am and sunset at 7:46 pm PDT.

Sunshine

With an average of 12.1h of sunshine, July has the most sunshine of the year in El Cajon.

UV index

June through September, with an average maximum UV index of 6, are months with the highest UV index in El Cajon. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the average person.
Note: In July, the average maximum UV index of 6 translates into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.