Costa Mesa, CA 92627 Monthly Weather

Orange County10:52 AM PDT33.65°N, 117.92°W
← September

October 2026

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Mon
Tue
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187°/65°Avg 81°/62°
2105°/66°Avg 81°/62°
3107°/72°Avg 81°/62°
4103°/77°Avg 81°/62°
5106°/75°Avg 81°/61°
699°/74°Avg 81°/61°
797°/72°Avg 80°/61°
893°/71°Avg 80°/61°
990°/68°Avg 80°/61°
1078°/67°0.09 inAvg 80°/60°
1172°/66°0.35 inAvg 80°/60°
1271°/60°0.13 inAvg 80°/60°
1379°/55°Avg 80°/60°
1485°/57°Avg 80°/60°
15Avg 80°/60°
16Avg 79°/60°
17Avg 79°/59°
18Avg 79°/59°
19Avg 79°/59°
20 Mostly Sunny 77°/61°Avg 79°/59°
21 Showers And Thunderstorms 72°/62°Avg 79°/58°
22 Showers And Thunderstorms 69°/57°Avg 79°/58°
23 Sunny 71°/58°Avg 79°/58°
24 Sunny 78°/61°Avg 78°/58°
25 Mostly Sunny 79°/61°Avg 78°/58°
26 Sunny 79°/61°Avg 78°/58°
27 Cloudy 83°/60°Avg 78°/57°
28 Cloudy 79°/60°Avg 78°/57°
29Avg 78°/57°
30Avg 78°/57°
31Avg 78°/56°
Average high91° (normal 80°)
Average low67° (normal 61°)
Warmest / coldest107° / 55°
Precipitation0.57 in (normal 0.17 in to date)
Record high today102° (1940)
Record low today35° (1949)

Observed: Santa Ana Fire Station, 12 km away, records since 1916. Normals 1991–2020. Climate data from NOAA's Regional Climate Centers (ACIS); recent days are preliminary. Days ahead: the forecast.

Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Conservative index and reflects what the press published. Terms of use.