NWS, American, European side by side around San Bernardino and nearby towns.Live rain radar →
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Next 14 hours
consensus of the three models
7-day forecast
where the models agree, and where they split
San Bernardino, CA is at its warmest in Jul (average highs near 98°F) and coldest in Jan (lows around 42°F), with roughly 23 in of precipitation across the year. Below, compare what NWS, American, European forecast for San Bernardino right now, and see exactly where they disagree.
San Bernardino climate by month
average daytime high and overnight low across a typical year
Jan
60°
42°
Feb
61°
42°
Mar
61°
44°
Apr
73°
47°
May
78°
52°
Jun
85°
58°
Jul
98°
67°
Aug
96°
67°
Sep
89°
62°
Oct
86°
57°
Nov
72°
47°
Dec
69°
44°
Common questions
What's the weather in San Bernardino today?
On this page we show what NWS, American, European each forecast for San Bernardino today, side by side and updated live. When all three agree the forecast is reliable; when they split, we flag it so you know the day is genuinely less certain.
Will it rain in San Bernardino today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for San Bernardino and flag the days where the models disagree on whether showers actually arrive, which is exactly when a single app can catch you out.
Which forecast is most accurate for San Bernardino?
No single model is always right. NWS, American, European each run their own physics, so we line all three up: when they agree the San Bernardino forecast is reliable, and when they split you should expect surprises. See our tested US accuracy scoreboard for how the models compare.
What is the warmest month in San Bernardino?
Jul is typically the warmest month in San Bernardino, with average highs around 98°F.
How cold does San Bernardino get?
The coldest month in San Bernardino is Jan, when overnight lows average about 42°F.
How much rain does San Bernardino get?
San Bernardino sees roughly 23 in of precipitation a year, with Feb usually the wettest month.
The forecasts Americans check
The two biggest apps keep their model a secret, so we can't show their numbers, only link you to them. The National Weather Service is public, so its data sits right in the comparison above.