Weather in Ontario, CA
Ontario, Friday, 13 November, 13:01
Overcast. Feels like 64°. High 65°, low 58°.
Monthly outlook for Ontario, CA: average high 68.1°, average low 56.9°. That is 0.1° below the climate normal for November. Precipitation is expected on 7 days (about 1.1 inches), against a normal of 2 days and 1.0 inches. The warmest day looks like 22 November (74.8°), the coolest 18 November (45.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 13 November – 22 November | 66° | 69.1° | -1.7° |
| 23 November – 2 December | 71.6° | 66.3° | +3° |
| 3 December – 12 December | at normal | 64.3° | — |
November records over 66 years
0.12
Ontario, Saturday, 14 November
Light rain. High 69°, low 55°.
0
Ontario, Sunday, 15 November
Clear. High 67°, low 51°.
0.06Ontario, Monday, 16 November
Light rain. High 64°, low 55°.
0.1Ontario, Tuesday, 17 November
Light rain. High 57°, low 48°.
0.13Ontario, Wednesday, 18 November
Rain. High 58°, low 45°.
0.44Ontario, Thursday, 19 November
Rain. High 66°, low 51°.
0.06Ontario, Friday, 20 November
Light rain. High 65°, low 59°.
0Ontario, Saturday, 21 November
Overcast. High 73°, low 59°.
0Ontario, Sunday, 22 November
Clear. High 75°, low 61°.
0
Ontario, Monday, 23 November
Partly cloudy. High 70°, low 60°.
0
Ontario, Tuesday, 24 November
Mostly clear. High 73°, low 60°.
0Ontario, Wednesday, 25 November
Overcast. High 74°, low 63°.
0Ontario, Thursday, 26 November
Overcast. High 71°, low 63°.
0Ontario, Friday, 27 November
Overcast. High 71°, low 60°.
0Ontario, Saturday, 28 November
Overcast. High 71°, low 62°.
0.14Ontario, Sunday, 29 November
Climate normal for this date — 60-year average.
0.08Ontario, Monday, 30 November
Climate normal for this date — 60-year average.
0.02Ontario, Tuesday, 1 December
Climate normal for this date — 60-year average.
0.03Ontario, Wednesday, 2 December
Climate normal for this date — 60-year average.
0.09Ontario, Thursday, 3 December
Climate normal for this date — 60-year average.
0.1Ontario, Friday, 4 December
Climate normal for this date — 60-year average.
0.08Ontario, Saturday, 5 December
Climate normal for this date — 60-year average.
0.11Ontario, Sunday, 6 December
Climate normal for this date — 60-year average.
0.13Ontario, Monday, 7 December
Climate normal for this date — 60-year average.
0.04Ontario, Tuesday, 8 December
Climate normal for this date — 60-year average.
0.03Ontario, Wednesday, 9 December
Climate normal for this date — 60-year average.
0.04Ontario, Thursday, 10 December
Climate normal for this date — 60-year average.
0.07Ontario, Friday, 11 December
Climate normal for this date — 60-year average.
0.07Ontario, Saturday, 12 December
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 Ontario, 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 Ontario, 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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