Weather in Irwindale, CA
Irwindale, Friday, 9 October, 01:58
Clear. Feels like 75°. High 91°, low 68°.
Monthly outlook for Irwindale, CA: average high 80°, average low 64.3°. That is 0.4° below the climate normal for October. Precipitation is expected on 2 days (about 1.7 inches), against a normal of 1 days and 0.3 inches. The warmest day looks like 17 October (94.8°), the coolest 14 October (49°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 October – 18 October | 82.1° | 81.2° | +0.5° |
| 19 October – 28 October | 76.4° | 79.1° | -1.5° |
| 29 October – 7 November | at normal | 76.2° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — South Monrovia Island (2 mi).
0
Irwindale, Saturday, 10 October
Light rain. High 86°, low 65°.
1.17Irwindale, Sunday, 11 October
Heavy rain. High 74°, low 57°.
0.54Irwindale, Monday, 12 October
Rain. High 61°, low 55°.
0Irwindale, Tuesday, 13 October
Light rain. High 65°, low 52°.
0
Irwindale, Wednesday, 14 October
Clear. High 76°, low 49°.
0Irwindale, Thursday, 15 October
Clear. High 88°, low 68°.
0Irwindale, Friday, 16 October
Clear. High 92°, low 74°.
0Irwindale, Saturday, 17 October
Clear. High 95°, low 76°.
0Irwindale, Sunday, 18 October
Clear. High 94°, low 78°.
0Irwindale, Monday, 19 October
Clear. High 90°, low 76°.
0Irwindale, Tuesday, 20 October
Clear. High 81°, low 67°.
0
Irwindale, Wednesday, 21 October
Overcast. High 72°, low 61°.
0
Irwindale, Thursday, 22 October
Partly cloudy. High 72°, low 61°.
0.01Irwindale, Friday, 23 October
Light rain. High 72°, low 62°.
0Irwindale, Saturday, 24 October
Partly cloudy. High 73°, low 61°.
0.02
Irwindale, Sunday, 25 October
Climate normal for this date — 60-year average.
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.
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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