Weather in Rialto, CA
Rialto, Friday, 16 October, 03:38
Clear. Feels like 73°. High 88°, low 71°.
Monthly outlook for Rialto, CA: average high 76.2°, average low 61.1°. That is 0.1° below the climate normal for October. Precipitation is expected on 4 days (about 1.4 inches), against a normal of 2 days and 0.5 inches. The warmest day looks like 16 October (88.1°), the coolest 21 October (53.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 16 October – 25 October | 75.4° | 77.7° | -1.3° |
| 26 October – 4 November | 77.6° | 74.2° | +1.9° |
| 5 November – 14 November | at normal | 70.4° | — |
October records over 66 years
0
Rialto, Saturday, 17 October
Overcast. High 86°, low 63°.
0
Rialto, Sunday, 18 October
Clear. High 82°, low 60°.
0Rialto, Monday, 19 October
Clear. High 78°, low 61°.
0.12
Rialto, Tuesday, 20 October
Light rain. High 67°, low 56°.
0.75Rialto, Wednesday, 21 October
Rain. High 59°, low 53°.
0.45Rialto, Thursday, 22 October
Light rain. High 69°, low 61°.
0.06Rialto, Friday, 23 October
Light rain. High 66°, low 58°.
0Rialto, Saturday, 24 October
Clear. High 77°, low 59°.
0Rialto, Sunday, 25 October
Clear. High 81°, low 64°.
0Rialto, Monday, 26 October
Clear. High 80°, low 62°.
0Rialto, Tuesday, 27 October
Clear. High 83°, low 64°.
0Rialto, Wednesday, 28 October
Overcast. High 74°, low 63°.
0Rialto, Thursday, 29 October
Clear. High 74°, low 59°.
0Rialto, Friday, 30 October
Clear. High 78°, low 60°.
0
Rialto, Saturday, 31 October
Mostly clear. High 77°, low 63°.
0.04Rialto, Sunday, 1 November
Climate normal for this date — 60-year average.
0.03Rialto, Monday, 2 November
Climate normal for this date — 60-year average.
0.01Rialto, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.03Rialto, 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.
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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