Weather in Rialto, CA
Rialto, Friday, 16 October, 01:10
Clear. Feels like 76°. High 88°, low 67°.
Monthly outlook for Rialto, CA: average high 75.6°, average low 60°. That is 0.4° below the climate normal for October. Precipitation is expected on 2 days (about 0.8 inches), against a normal of 2 days and 0.5 inches. The warmest day looks like 16 October (88.1°), the coolest 21 October (49.2°).
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 | 75.9° | 74.2° | +1° |
| 5 November – 14 November | at normal | 70.4° | — |
October records over 66 years
0
Rialto, Saturday, 17 October
Overcast. High 86°, low 62°.
0
Rialto, Sunday, 18 October
Clear. High 81°, low 58°.
0Rialto, Monday, 19 October
Clear. High 78°, low 61°.
0.2
Rialto, Tuesday, 20 October
Light rain. High 64°, low 50°.
0.57Rialto, Wednesday, 21 October
Rain. High 64°, low 49°.
0.02Rialto, Thursday, 22 October
Light rain. High 64°, low 56°.
0Rialto, Friday, 23 October
Clear. High 73°, low 57°.
0Rialto, Saturday, 24 October
Clear. High 79°, low 63°.
0Rialto, Sunday, 25 October
Clear. High 76°, low 61°.
0Rialto, Monday, 26 October
Clear. High 80°, low 61°.
0Rialto, Tuesday, 27 October
Clear. High 80°, low 63°.
0
Rialto, Wednesday, 28 October
Partly cloudy. High 78°, low 66°.
0Rialto, Thursday, 29 October
Overcast. High 75°, low 64°.
0Rialto, Friday, 30 October
Clear. High 72°, low 61°.
0Rialto, Saturday, 31 October
Overcast. High 71°, low 62°.
0.04
Rialto, 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.
0.09Rialto, 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.
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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