Weather in San Bernardino, CA
San Bernardino, Sunday, 9 August, 05:37
Clear. Feels like 76°. High 100°, low 72°.
Monthly outlook for San Bernardino, CA: average high 91.4°, average low 70°. That is 0.1° above the climate normal for August. Precipitation is expected on 1 day (about 0.0 inches), against a normal of 2 days and 0.4 inches. The warmest day looks like 9 August (100.2°), the coolest 16 August (66.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 90.1° | 91.5° | -0.8° |
| 19 August – 28 August | 93.6° | 91.5° | +1.2° |
| 29 August – 7 September | at normal | 92.5° | — |
August records over 66 years
0
San Bernardino, Monday, 10 August
Mostly clear. High 97°, low 73°.
0
San Bernardino, Tuesday, 11 August
Overcast. High 94°, low 73°.
0San Bernardino, Wednesday, 12 August
Mostly clear. High 91°, low 70°.
0San Bernardino, Thursday, 13 August
Mostly clear. High 87°, low 68°.
0San Bernardino, Friday, 14 August
Overcast. High 86°, low 68°.
0.04
San Bernardino, Saturday, 15 August
Light rain. High 78°, low 67°.
0San Bernardino, Sunday, 16 August
Overcast. High 87°, low 67°.
0San Bernardino, Monday, 17 August
Overcast. High 90°, low 69°.
0
San Bernardino, Tuesday, 18 August
Partly cloudy. High 91°, low 69°.
0San Bernardino, Wednesday, 19 August
Overcast. High 92°, low 70°.
0San Bernardino, Thursday, 20 August
Partly cloudy. High 94°, low 70°.
0San Bernardino, Friday, 21 August
Partly cloudy. High 93°, low 71°.
0
San Bernardino, Saturday, 22 August
Clear. High 95°, low 72°.
0San Bernardino, Sunday, 23 August
Clear. High 93°, low 71°.
0San Bernardino, Monday, 24 August
Clear. High 94°, low 70°.
0.02San Bernardino, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.02San Bernardino, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.01San Bernardino, Thursday, 27 August
Climate normal for this date — 60-year average.
0.01San Bernardino, Friday, 28 August
Climate normal for this date — 60-year average.
0.01San Bernardino, Saturday, 29 August
Climate normal for this date — 60-year average.
0.02San Bernardino, Sunday, 30 August
Climate normal for this date — 60-year average.
0.01San Bernardino, Monday, 31 August
Climate normal for this date — 60-year average.
0.02San Bernardino, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.04San Bernardino, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.02San Bernardino, Thursday, 3 September
Climate normal for this date — 60-year average.
0.01San Bernardino, Friday, 4 September
Climate normal for this date — 60-year average.
0.01San Bernardino, Saturday, 5 September
Climate normal for this date — 60-year average.
0.01San Bernardino, Sunday, 6 September
Climate normal for this date — 60-year average.
0.01San Bernardino, Monday, 7 September
Climate normal for this date — 60-year average.
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for San Bernardino, CA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in San Bernardino, CA since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.
Sun and moon today
Weather history
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