Weather in Costa Mesa, CA
Costa Mesa, Friday, 23 October, 09:13
Overcast. Feels like 64°. High 74°, low 60°.
Monthly outlook for Costa Mesa, CA: average high 72.7°, average low 62.6°. That is 0.4° above the climate normal for October. Precipitation is expected on 4 days (about 2.0 inches), against a normal of 1 days and 0.3 inches. The warmest day looks like 26 October (80.7°), the coolest 25 October (57.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 23 October – 1 November | 74.4° | 72.6° | +1° |
| 2 November – 11 November | 69.9° | 70.2° | -0.1° |
| 12 November – 21 November | at normal | 68.3° | — |
October records over 66 years
0
Costa Mesa, Saturday, 24 October
Clear. High 81°, low 59°.
0Costa Mesa, Sunday, 25 October
Clear. High 79°, low 57°.
0Costa Mesa, Monday, 26 October
Overcast. High 81°, low 58°.
0
Costa Mesa, Tuesday, 27 October
Mostly clear. High 76°, low 59°.
0Costa Mesa, Wednesday, 28 October
Overcast. High 76°, low 59°.
0Costa Mesa, Thursday, 29 October
Overcast. High 70°, low 66°.
0Costa Mesa, Friday, 30 October
Overcast. High 70°, low 66°.
0.37
Costa Mesa, Saturday, 31 October
Rain. High 68°, low 65°.
1.28Costa Mesa, Sunday, 1 November
Rain. High 69°, low 65°.
0.32Costa Mesa, Monday, 2 November
Light rain. High 67°, low 65°.
0.01Costa Mesa, Tuesday, 3 November
Light rain. High 67°, low 64°.
0Costa Mesa, Wednesday, 4 November
Overcast. High 67°, low 63°.
0
Costa Mesa, Thursday, 5 November
Partly cloudy. High 68°, low 63°.
0Costa Mesa, Friday, 6 November
Mostly clear. High 76°, low 65°.
0Costa Mesa, Saturday, 7 November
Overcast. High 74°, low 68°.
0.07Costa Mesa, Sunday, 8 November
Climate normal for this date — 60-year average.
0.04Costa Mesa, Monday, 9 November
Climate normal for this date — 60-year average.
0.03Costa Mesa, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.04Costa Mesa, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.04Costa Mesa, Thursday, 12 November
Climate normal for this date — 60-year average.
0.03Costa Mesa, Friday, 13 November
Climate normal for this date — 60-year average.
0.04Costa Mesa, Saturday, 14 November
Climate normal for this date — 60-year average.
0.06Costa Mesa, Sunday, 15 November
Climate normal for this date — 60-year average.
0.05Costa Mesa, Monday, 16 November
Climate normal for this date — 60-year average.
0.04Costa Mesa, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.04Costa Mesa, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.06Costa Mesa, Thursday, 19 November
Climate normal for this date — 60-year average.
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.
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
50°Weather in Annapolis, MD58°Weather in Atlanta, GA64°Weather in Augusta, ME45°Weather in Austin, TX74°Weather in Baton Rouge, LA74°Weather in Bismarck, ND59°Weather in Boise, ID46°Weather in Boston, MA51°Weather in Carson City, NV45°Weather in Charleston, WV56°Weather in Charlotte Amalie, VI88°Weather in Cheyenne, WY56°Weather in Columbia, SC63°Weather in Columbus, OH59°Weather in Concord, NH52°Weather in Denver, CO65°Weather in Des Moines, IA65°Weather in Dover, DE58°Weather in Frankfort, KY63°Weather in Harrisburg, PA57°Weather in Hartford, CT53°Weather in Helena, MT47°Weather in Honolulu, HI
71°Weather in Indianapolis, IN61°Weather in Jackson, MS69°Weather in Jefferson City, MO63°Weather in Juneau, AK
28°Weather in Lansing, MI
47°Weather in Lincoln, NE68°Weather in Little Rock, AR65°Weather in Madison, WI61°Weather in Montgomery, AL65°Weather in Montpelier, VT46°Weather in Nashville, TN60°Weather in Oklahoma City, OK66°Weather in Olympia, WA41°Weather in Phoenix, AZ66°Weather in Pierre, SD63°Weather in Providence, RI52°Weather in Raleigh, NC61°Weather in Richmond, VA60°Weather in Sacramento, CA57°Weather in Salem, OR39°Weather in Salt Lake City, UT52°Weather in San Juan, PR90°Weather in Santa Fe, NM55°Weather in Springfield, IL64°Weather in St. Paul, MN65°Weather in Tallahassee, FL69°Weather in Topeka, KS65°Weather in Trenton, NJ56°Weather in Washington, DC59°57°Weather in Archer, CA63°Weather in Arcilla, CA60°Weather in Arguello, CA58°Weather in Arlanza, CA62°Weather in Arlight, CA57°Weather in Arnold Heights, CA59°Weather in Arrowhead Springs, CA57°Weather in Ash Hill, CA58°Weather in Asuncion, CA57°Weather in Athens, CA64°Weather in Aurant, CA64°Weather in Azure Vista, CA62°Weather in Bannister, CA60°Weather in Bannock, CA60°Weather in Bard, CA67°Weather in Bicknell, CA58°Weather in Biskra Palms, CA68°Weather in Bissell, CA56°Weather in Bitterwater, CA54°