Weather in Rialto, CA
Rialto, Monday, 19 October, 01:56
Clear. Feels like 64°. High 83°, low 63°.
Monthly outlook for Rialto, CA: average high 73.8°, average low 60.4°. That is 1° below the climate normal for October. Precipitation is expected on 4 days (about 1.3 inches), against a normal of 2 days and 0.5 inches. The warmest day looks like 26 October (87.4°), the coolest 22 October (50.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 19 October – 28 October | 76.3° | 76.7° | -0.2° |
| 29 October – 7 November | 69.6° | 73.2° | -2° |
| 8 November – 17 November | at normal | 69.2° | — |
October records over 66 years
0
Rialto, Tuesday, 20 October
Clear. High 81°, low 63°.
0.22
Rialto, Wednesday, 21 October
Rain. High 71°, low 58°.
0.85Rialto, Thursday, 22 October
Rain. High 58°, low 51°.
0.08Rialto, Friday, 23 October
Light rain. High 62°, low 51°.
0Rialto, Saturday, 24 October
Clear. High 72°, low 52°.
0Rialto, Sunday, 25 October
Clear. High 86°, low 66°.
0
Rialto, Monday, 26 October
Overcast. High 87°, low 69°.
0Rialto, Tuesday, 27 October
Clear. High 83°, low 69°.
0Rialto, Wednesday, 28 October
Clear. High 80°, low 66°.
0Rialto, Thursday, 29 October
Overcast. High 74°, low 64°.
0Rialto, Friday, 30 October
Overcast. High 71°, low 61°.
0Rialto, Saturday, 31 October
Overcast. High 70°, low 61°.
0.2Rialto, Sunday, 1 November
Light rain. High 64°, low 58°.
0Rialto, Monday, 2 November
Clear. High 69°, low 56°.
0Rialto, Tuesday, 3 November
Overcast. High 70°, low 58°.
0.03
Rialto, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.01Rialto, Thursday, 5 November
Climate normal for this date — 60-year average.
0.02Rialto, Friday, 6 November
Climate normal for this date — 60-year average.
0.07Rialto, Saturday, 7 November
Climate normal for this date — 60-year average.
0.09
Rialto, 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.
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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