The highest day temperature in July 2025 was 102°F. The lowest night temperature was 63°F. The average values for day and night temperatures during July were 91.1°F и 70.4°F respectivly.

Almost all days in July are sunny. There is very low probability of clouds or gloomy days.

Precipitation total in July for San Bernardino is 0.0 in. It makes july the least rainy month of the year.

The average wind speed in July is 4.3 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for San Bernardino in July is 13.4 hours.