Weather in Irwindale, CA
Irwindale, Saturday, 10 October, 03:54
Overcast. Feels like 71°. High 86°, low 70°.
Monthly outlook for Irwindale, CA: average high 84.3°, average low 67.8°. That is 2.1° above the climate normal for October. Precipitation is expected on 2 days (about 2.0 inches), against a normal of 1 days and 0.3 inches. The warmest day looks like 24 October (97.3°), the coolest 13 October (45.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 10 October – 19 October | 80.6° | 81° | -0.2° |
| 20 October – 29 October | 90.4° | 78.7° | +6.5° |
| 30 October – 8 November | at normal | 75.9° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — South Monrovia Island (2 mi).
0.94
Irwindale, Sunday, 11 October
Rain. High 70°, low 57°.
1.04Irwindale, Monday, 12 October
Rain. High 58°, low 52°.
0.02Irwindale, Tuesday, 13 October
Light rain. High 64°, low 46°.
0
Irwindale, Wednesday, 14 October
Clear. High 71°, low 48°.
0Irwindale, Thursday, 15 October
Clear. High 80°, low 53°.
0Irwindale, Friday, 16 October
Clear. High 94°, low 75°.
0Irwindale, Saturday, 17 October
Clear. High 97°, low 77°.
0Irwindale, Sunday, 18 October
Clear. High 96°, low 82°.
0Irwindale, Monday, 19 October
Clear. High 90°, low 78°.
0Irwindale, Tuesday, 20 October
Clear. High 87°, low 72°.
0Irwindale, Wednesday, 21 October
Clear. High 83°, low 68°.
0
Irwindale, Thursday, 22 October
Partly cloudy. High 91°, low 72°.
0
Irwindale, Friday, 23 October
Mostly clear. High 94°, low 77°.
0Irwindale, Saturday, 24 October
Clear. High 97°, low 79°.
0Irwindale, Sunday, 25 October
Partly cloudy. High 89°, low 78°.
0.01Irwindale, Monday, 26 October
Climate normal for this date — 60-year average.
0.05Irwindale, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.01Irwindale, Wednesday, 28 October
Climate normal for this date — 60-year average.
0Irwindale, Thursday, 29 October
Climate normal for this date — 60-year average.
0.05Irwindale, Friday, 30 October
Climate normal for this date — 60-year average.
0.02Irwindale, Saturday, 31 October
Climate normal for this date — 60-year average.
0.03Irwindale, Sunday, 1 November
Climate normal for this date — 60-year average.
0.02Irwindale, Monday, 2 November
Climate normal for this date — 60-year average.
0Irwindale, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.02Irwindale, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.01Irwindale, Thursday, 5 November
Climate normal for this date — 60-year average.
0.02Irwindale, Friday, 6 November
Climate normal for this date — 60-year average.
0.06Irwindale, Saturday, 7 November
Climate normal for this date — 60-year average.
0.08Irwindale, Sunday, 8 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 Irwindale, 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 Irwindale, 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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