11-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Mainly clear
23°
Feels like 23°
Wind↑ NW 3 km/h
Humidity 28 %
Evening
Mainly clear
20°
Feels like 21°
Wind↑ SW 3 km/h
Humidity 46 %
12-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Partly cloudy
21°
Feels like 22°
Wind↑ SSW 4 km/h
Humidity 46 %
Evening
Mainly clear
18°
Feels like 18°
Wind↑ SSE 8 km/h
Humidity 72 %
13-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Clear sky
19°
Feels like 19°
Wind↑ SSW 17 km/h
Humidity 54 %
💧 0.1 mm
Evening
Light rain
17°
Feels like 17°
Wind↑ SW 31 km/h
Gusts47 km/h
Humidity 92 %
💧 3.9 mm
14-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Santa Ana forecast in charts · next 7 days
The week ahead: highs and lows
≈ A week close to the usual temperatures
Highs Lows Usual for the season (1991–2020 average)
Hourly detail
Temperature (°C) Rain (mm) Wind (km/h)
Santa Ana climate: what a normal year looks like
A normal year brings roughly 360 mm of rain — less than 92% of the towns of 20,000+ people we compared it with.
The wet season is concentrated from January to March, which brings 61% of the annual total; February by itself averages 88 mm.
The hottest stretch is August, when afternoons average 28 °C; the coldest is December, when nights average 9 °C.
From 14 h 23 min of daylight in late June to 9 h 54 min in late December.
Forecast highs for the coming week average 22 °C, 2 °C cooler than a normal October (24 °C).
30-year averages (1991–2020)
Month
Typical high
Typical low
Rainfall
Jan
18 °C
9 °C
77 mm
Feb
18 °C
10 °C
88 mm
Mar
19 °C
11 °C
55 mm
Apr
20 °C
12 °C
24 mm
May
21 °C
14 °C
11 mm
Jun
24 °C
16 °C
3 mm
Jul
27 °C
18 °C
2 mm
Aug
28 °C
19 °C
1 mm
Sep
28 °C
18 °C
5 mm
Oct
24 °C
16 °C
18 mm
Nov
21 °C
12 °C
23 mm
Dec
18 °C
9 °C
54 mm
Whole year
22 °C
13 °C
360 mm
Source: our own processing of the ERA5 reanalysis (Copernicus/ECMWF) for 33.75° N, 117.87° W, 1991–2020. ERA5 averages over a 0.25° grid (about 25 km): hills, a coastline or the heat of the city itself can shift local values by a degree or two.
Air you breathe in Santa Ana: pollution and pollen
1/6
Good
European Air Quality Index (EAQI), from Copernicus CAMS
PM2.53µg/m³
PM105µg/m³
Copernicus CAMS model, updated several times a day.
Rain radar around Santa Ana
Rain observed over the last two hours by official weather radars around Santa Ana, followed by the radar forecast for the next hour where the weather service provides one.
--:--
Rain radarLast two hours, then forecast where available · drag the timeline
Moon over Santa Ana
Waning gibbous
87 % illuminated · 18.3 days
Rise 22:44 Set 13:15
Fri30/1079%
Sat31/1069%
Sun1/1159%
Mon2/1149%Last quarter
Tue3/1138%
Wed4/1128%
Thu5/1119%
Fri6/1112%
Sat7/116%
Sun8/112%
Mon9/110%
Tue10/111%New moon
Moonrise and moonset in local time (America/Los_Angeles); phase and lit fraction from a synodic calculation.
Look up a past day in Santa Ana
Curious about the weather in Santa Ana on a given day? Choose a date: we read it from the ERA5 reanalysis (ECMWF / Copernicus C3S), which runs until about a week ago.
Santa Ana weather at a glance
This page gathers everything about the weather in Santa Ana, CA: conditions now, the forecast for each part of the day and the trend for the coming week. At the moment the sky is “partly cloudy”, it is 16 °C (feels like 16 °C) and the wind blows at 3 km/h.
Expected range today: 16 °C to 20 °C and a dry sky. The forecast comes from the AtmoAtlas engine, which combines ECMWF-AIFS, NOAA GFS and DWD ICON, adjusts cloud cover with METAR reports and uses convective energy (CAPE) to flag storms.
Use the Santa Ana forecast in your own website or app: one JSON call returns weather, air quality, tides and sun and moon times. The free key needs no card.
