Weather in Costa Mesa, CA
Costa Mesa, Wednesday, 4 November, 00:04
Clear. Feels like 62°. High 78°, low 56°.
Monthly outlook for Costa Mesa, CA: average high 74.3°, average low 63.4°. That is 2.9° above the climate normal for November. Precipitation is expected on 2 days (about 0.4 inches), against a normal of 1 days and 0.6 inches. The warmest day looks like 8 November (86.9°), the coolest 5 November (55.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 4 November – 13 November | 77.4° | 69.7° | +4.3° |
| 14 November – 23 November | 69.2° | 67.7° | +0.8° |
| 24 November – 3 December | at normal | 66.1° | — |
November records over 66 years
0
Costa Mesa, Thursday, 5 November
Clear. High 76°, low 56°.
0Costa Mesa, Friday, 6 November
Clear. High 82°, low 56°.
0Costa Mesa, Saturday, 7 November
Clear. High 87°, low 68°.
0Costa Mesa, Sunday, 8 November
Clear. High 87°, low 67°.
0
Costa Mesa, Monday, 9 November
Partly cloudy. High 78°, low 65°.
0
Costa Mesa, Tuesday, 10 November
Overcast. High 75°, low 69°.
0Costa Mesa, Wednesday, 11 November
Clear. High 74°, low 68°.
0Costa Mesa, Thursday, 12 November
Overcast. High 69°, low 67°.
0.05
Costa Mesa, Friday, 13 November
Light rain. High 68°, low 65°.
0
Costa Mesa, Saturday, 14 November
Mostly clear. High 69°, low 65°.
0.32Costa Mesa, Sunday, 15 November
Rain. High 67°, low 62°.
0Costa Mesa, Monday, 16 November
Clear. High 69°, low 61°.
0Costa Mesa, Tuesday, 17 November
Clear. High 71°, low 62°.
0Costa Mesa, Wednesday, 18 November
Overcast. High 71°, low 64°.
0Costa Mesa, Thursday, 19 November
Partly cloudy. High 68°, low 64°.
0.07Costa Mesa, Friday, 20 November
Climate normal for this date — 60-year average.
0.06Costa Mesa, Saturday, 21 November
Climate normal for this date — 60-year average.
0.04Costa Mesa, Sunday, 22 November
Climate normal for this date — 60-year average.
0.01Costa Mesa, Monday, 23 November
Climate normal for this date — 60-year average.
0.03Costa Mesa, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.05Costa Mesa, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.06Costa Mesa, Thursday, 26 November
Climate normal for this date — 60-year average.
0.03Costa Mesa, Friday, 27 November
Climate normal for this date — 60-year average.
0.07Costa Mesa, Saturday, 28 November
Climate normal for this date — 60-year average.
0.09Costa Mesa, Sunday, 29 November
Climate normal for this date — 60-year average.
0.05Costa Mesa, Monday, 30 November
Climate normal for this date — 60-year average.
0.02Costa Mesa, Tuesday, 1 December
Climate normal for this date — 60-year average.
0.02Costa Mesa, Wednesday, 2 December
Climate normal for this date — 60-year average.
0.05Costa Mesa, Thursday, 3 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 Costa Mesa, 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 Costa Mesa, 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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