Weather in Rialto, CA
Rialto, Wednesday, 21 October, 18:19
Overcast. Feels like 72°. High 72°, low 59°.
Monthly outlook for Rialto, CA: average high 75.3°, average low 60.1°. That is 0.2° above the climate normal for October. Precipitation is expected on 2 days (about 1.6 inches), against a normal of 2 days and 0.5 inches. The warmest day looks like 28 October (84.5°), the coolest 25 October (50°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 21 October – 30 October | 73.6° | 75.5° | -1.1° |
| 31 October – 9 November | 78.2° | 72.6° | +3.1° |
| 10 November – 19 November | at normal | 68.8° | — |
October records over 66 years
0.65
Rialto, Thursday, 22 October
Heavy rain. High 61°, low 54°.
0.01Rialto, Friday, 23 October
Light rain. High 63°, low 51°.
0
Rialto, Saturday, 24 October
Clear. High 69°, low 51°.
0Rialto, Sunday, 25 October
Clear. High 72°, low 50°.
0Rialto, Monday, 26 October
Clear. High 76°, low 54°.
0
Rialto, Tuesday, 27 October
Partly cloudy. High 81°, low 57°.
0Rialto, Wednesday, 28 October
Overcast. High 85°, low 70°.
0Rialto, Thursday, 29 October
Overcast. High 82°, low 69°.
0Rialto, Friday, 30 October
Overcast. High 75°, low 63°.
0Rialto, Saturday, 31 October
Overcast. High 67°, low 60°.
0Rialto, Sunday, 1 November
Clear. High 75°, low 59°.
0Rialto, Monday, 2 November
Clear. High 81°, low 65°.
0Rialto, Tuesday, 3 November
Clear. High 82°, low 67°.
0Rialto, Wednesday, 4 November
Clear. High 82°, low 67°.
0Rialto, Thursday, 5 November
Clear. High 83°, low 67°.
0.02
Rialto, Friday, 6 November
Climate normal for this date — 60-year average.
0.07Rialto, Saturday, 7 November
Climate normal for this date — 60-year average.
0.09Rialto, Sunday, 8 November
Climate normal for this date — 60-year average.
0.06Rialto, Monday, 9 November
Climate normal for this date — 60-year average.
0.04Rialto, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.07Rialto, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.04Rialto, Thursday, 12 November
Climate normal for this date — 60-year average.
0.04Rialto, Friday, 13 November
Climate normal for this date — 60-year average.
0.05Rialto, Saturday, 14 November
Climate normal for this date — 60-year average.
0.08Rialto, Sunday, 15 November
Climate normal for this date — 60-year average.
0.06Rialto, Monday, 16 November
Climate normal for this date — 60-year average.
0.04Rialto, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.07Rialto, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.06Rialto, Thursday, 19 November
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 Rialto, 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 Rialto, 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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