Last updated: June 24, 2025
In San Diego, United States, the average temperature in July hovers around a balmy 30°C (86°F). Expect a minimum of 20°C (68°F) and the mercury can soar to a sweltering 42°C (108°F) at times. During this month, you can anticipate 79 mm (3.1 in) of precipitation over about 8 days, accompanied by an average humidity of 66%. Stay hydrated and enjoy the warmth!
In July, in San Diego, the average temperature is 30°C (86°F). Maximums can reach 42°C (108°F) and minimums can be as low as 20°C (68°F). This warm climate makes San Diego an ideal destination for those seeking sun and outdoor activities during their travels.
In San Diego in July, the precipitation amount is 79 mm (3.1 in) during 8 days, indicating a relatively wet period for the area.
In San Diego in July humidity is 66%. With an average temperature of 30°C (86°F), this humidity feels like a warm, enveloping blanket that clings to your skin, making any outdoor activity more demanding and necessitating regular breaks to hydrate and cool off.
In San Diego in July, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in San Diego.
UV Risk Categories
Weather in San Diego varies notably across the year, with each month offering distinct climate conditions. This page compares July’s weather to other months in San Diego, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 14°C (58°F) | 27 mm (1.1 inches) | 83% | high |
February Weather | 16°C (61°F) | 24 mm (1.0 inches) | 79% | very high |
March Weather | 21°C (69°F) | 54 mm (2.1 inches) | 76% | very high |
April Weather | 24°C (75°F) | 41 mm (1.6 inches) | 77% | extreme |
May Weather | 27°C (81°F) | 99 mm (3.9 inches) | 80% | extreme |
June Weather | 29°C (84°F) | 88 mm (3.4 inches) | 73% | extreme |
July Weather | 30°C (86°F) | 79 mm (3.1 inches) | 66% | extreme |
August Weather | 30°C (87°F) | 52 mm (2.1 inches) | 65% | extreme |
September Weather | 28°C (82°F) | 104 mm (4.1 inches) | 73% | extreme |
October Weather | 24°C (76°F) | 44 mm (1.7 inches) | 76% | very high |
November Weather | 19°C (66°F) | 37 mm (1.4 inches) | 80% | high |
December Weather | 16°C (61°F) | 38 mm (1.5 inches) | 86% | moderate |