The temperatures in San Bernardino in May are quite cold with temperatures between 9°C and 26°C, warm clothes are a must.
There is little to no rain in San Bernardino during May, so it’s a lot easier to explore the city. Just remember to dress in warm layers, as it can still get pretty chilly.
Our weather forecast can give you a great sense of what weather to expect in San Bernardino in May 2025.
If you’re planning to visit San Bernardino in the near future, we highly recommend that you review the 14 day weather forecast for San Bernardino before you arrive.
Temperatures
26° / 9°
Rainy Days
0
Snowy Days
0
Dry Days
31
Rainfall
7
mm
Sun Hours
11.9
Hrs
