How much rain and snow fell in Costa Mesa, California?

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Costa Mesa got 0.34 in of rain in the last 24 hours (to 12 PM PDT, Oct 11). Past 7 days: 0.34 in. This year: 4.30 in.

Yesterday and last night (24 hours to 5 AM PDT, Oct 10): no rain.

0.34

inches

of rain

In the 24 hours to 12:00 PM PDT, Sunday, October 11, 2026

radar estimate

Estimated from weather radar (NOAA)?. Usually within 10 to 15 percent of what a rain gauge? in your yard would catch.
New snow: 0.0 in in the last 24 hours and not measured this season (NOAA snow estimate)

Compared with normal

Last 7 days0.27 in wetter than normal (normal 0.07 in, Oct 5 to 11, Santa Ana John Wayne Airport, 1991 to 2020)1991 to 2020 average (the official normal), NOAA station records, Santa Ana John Wayne Airport
This month0.26 in wetter than normal (normal 0.09 in, Oct 1 to 11, Santa Ana John Wayne Airport, 1991 to 2020)1991 to 2020 average, NOAA station records, Santa Ana John Wayne Airport

Will this match my gauge? Each day here ends at 5:00 AM PDT, close to when volunteers read their rain gauges (about 7 AM). How close we usually are

Updated 1:25 PM PDT

Costa Mesa 0.34Los Angeles dryIrvine 0.63Rancho Cucamonga 0.89San Clemente 1.17Costa Mesa 0.34Los Angeles dryLong Beach 0.06Anaheim 0.70

Rain, inches

0.01

0.10

0.25

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1.00

1.50

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6.00+

Rain in the 24 hours to 12 PM Sunday, Oct 11. Radar estimate from NOAA.

Labels: Costa Mesa and nearby towns within 40 miles, in inches. Cut from the state map.

The most rain in a day in Costa Mesa since January 26, 2025, and the 265th wettest day at Santa Ana John Wayne Airport since 1999, tied with 4 other days.

NOAA station records · Santa Ana John Wayne Airport (USW00093184), 2.7 mi away · 264 wetter days out of 9,476 on record, 4 tied days. This storm: Oct 11 to Oct 11, 0.28 in of rain; its biggest day, Oct 11, was 0.28 in.

The last 14 days

Sep 27 to Oct 10, 2026

Rain, inches (radar estimate)

0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00

Each bar is one day ending 5:00 AM PDT. T = a trace, too little to measure; n/m = not measured.? Every value is printed, so the chart reads without color.

October 2026, day by day

Tap a day to see its total

Sun

Mon

Tue

Wed

Thu

Fri

Sat

Tap a day for its total.

Figures: rain, inches (radar estimate); new snow, inches (NOAA snow estimate). Striped days are not measured or not in the data; days marked not yet are after the latest day. Each day ends 5:00 AM PDT.

Total for a date range

FromTo

Loading the total.

Rain goes back to Oct 14, 2020; snow to Oct 1, 2008. Days labeled by the date they end.

Every rain total for Costa Mesa

Period	Rain
Last 24 hours, to 12:00 PM PDT Oct 11	0.34 in radar estimate
Last 72 hours	0.34 in radar estimate
Last 7 days	0.34 in radar estimate
This month so far	0.35 in radar estimate
This year, 2026 so far	4.30 in radar estimate

Every snow total

Period	New snow
Last 24 hours	0.0 in NOAA snow estimate
Last 72 hours	0.0 in NOAA snow estimate
Last 7 days	not measured
This month so far	not measured
This season so far	not measured

How months count

Costa Mesa at a glance

Costa Mesa is in California, at about 72 ft above sea level at its Census center point and had an estimated 109,131 residents in 2024.

The weather station's records since 1999 come from Santa Ana John Wayne Airport, 2.7 miles away.

The wettest day on record at Santa Ana John Wayne Airport was 3.24 in on December 6, 2018.

From Sep 27 to Oct 10, Costa Mesa had no measurable rain on any of the 14 days with data, by weather radar.

Nearby California towns

Town	From Costa Mesa	24 hours	7 days
Fountain Valley rain totals (3.8 mi)	3.8 mi northwest	0.33 in	0.33 in
Newport Beach rain totals (4.9 mi)	4.9 mi south	0.43 in	0.43 in
Santa Ana rain totals (5.2 mi)	5.2 mi north	0.33 in	0.34 in
Huntington Beach rain totals (5.7 mi)	5.7 mi northwest	0.42 in	0.42 in
Tustin rain totals (7.4 mi)	7.4 mi northeast	0.46 in	0.47 in
Westminster rain totals (7.6 mi)	7.6 mi northwest	0.43 in	0.43 in

Rain totals are estimated from weather radar (NOAA). Distance is in a straight line between Census center points.

Nearby rain gauges (read by volunteers)

3 closest

Rain gauge	Distance	Read at	Melted to water	New snow	Snow depth
Costa Mesa 1.2 WNW Station CA-OR-108. Read at 8:00 AM on October 11, 2026.	1.2 mi	8:00 AM	0.35 in	not reported	not reported
Huntington Beach 2.0 ESE Station CA-OR-43. Read at 7:00 AM on October 11, 2026.	3.8 mi	7:00 AM	0.30 in	not reported	not reported
Newport Beach 1.2 E Station CA-OR-79. Read at 7:00 AM on October 11, 2026.	3.9 mi	7:00 AM	0.37 in	not reported	not reported

Volunteer gauge reports: CoCoRaHS (cocorahs.org), CC BY 3.0. Measured by hand once a day; report date October 11, 2026. Shown as measured, not edited.

How close? Radar rain estimates are usually within about 10 to 15 percent of a rain gauge in your yard. City snow totals are usually within about 25 percent or 1 inch of what volunteers measure. Method and accuracy