High Surf Advisory — San Diego County Coastal Areas, CA, Orange County Coastal, CA 1:00 AM Heat Advisory — Los Angeles County Inland Coast including Downtown Los Angeles, CA 10:00 PM

Fountain Valley, California

Last updated: 11:17 AM CDT  ·  Refresh
23°C
Feels like 24°
Mostly Clear
▲ 27°  /  ▼ 19°
Wind
5 mph SSW
Humidity
67%
Dew Point
18°
Pressure
29.92 inHg
Visibility
10 mi
UV Index
7.4
Cloud Cover
12%
Sunrise
5:55 AM
Sunset
7:59 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Fountain Valley is currently mostly clear at 24°C. Dry conditions are expected through the next 24 hours. Sunrise: 5:55AM · Sunset: 7:59PM.

Alerts

High Surf Advisory
San Diego County Coastal Areas, CA, Orange County Coastal, CA
Expires 1:00 AM
Heat Advisory
Los Angeles County Inland Coast including Downtown Los Angeles, CA
Expires 10:00 PM
52 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
23°
3%
10 AM
23°
3%
11 AM
23°
3%
12 PM
23°
3%
1 PM
26°
3%
2 PM
26°
3%
3 PM
26°
3%
4 PM
26°
3%
5 PM
27°
3%
6 PM
26°
3%
7 PM
25°
3%
8 PM
24°
3%
9 PM
23°
3%
10 PM
23°
3%
11 PM
23°
3%
12 AM
23°
3%
1 AM
22°
7%
2 AM
22°
6%
3 AM
22°
6%
4 AM
21°
6%
5 AM
19°
6%
6 AM
19°
6%
7 AM
19°
7%
8 AM
19°
7%
7-Day Forecast
Today
27° 19°
Clear.
Wed
26° 19°
Partly Cloudy.
Thu
28° 19°
Mostly Clear.
Fri
28° 19°
Partly Cloudy.
Sat
29° 21°
Clear.
Sun
29° 21°
Clear.
Mon
28° 21°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 23° Mostly Clear 3% 5 mph SSW 67%
10 AM 23° Clear 3% 7 mph SW 63%
11 AM 23° Clear 3% 8 mph SW 59%
12 PM 23° Clear 3% 9 mph SW 56%
1 PM 26° Clear 3% 10 mph WSW 54%
2 PM 26° Clear 3% 10 mph WSW 52%
3 PM 26° Clear 3% 11 mph W 52%
4 PM 26° Clear 3% 12 mph W 52%
5 PM 27° Clear 3% 12 mph W 55%
6 PM 26° Clear 3% 11 mph W 61%
7 PM 25° Mostly Clear 3% 10 mph W 69%
8 PM 24° Mostly Clear 3% 9 mph W 76%
9 PM 23° Mostly Clear 3% 8 mph W 80%
10 PM 23° Mostly Clear 3% 7 mph W 83%
11 PM 23° Partly Cloudy 3% 6 mph W 86%
12 AM 23° Partly Cloudy 3% 6 mph W 88%
1 AM 22° Mostly Cloudy 7% 6 mph W 89%
2 AM 22° Mostly Cloudy 6% 6 mph W 90%
3 AM 22° Mostly Cloudy 6% 6 mph W 90%
4 AM 21° Mostly Cloudy 6% 5 mph W 90%
5 AM 19° Mostly Cloudy 6% 5 mph W 90%
6 AM 19° Mostly Cloudy 6% 5 mph W 89%
7 AM 19° Mostly Cloudy 7% 5 mph W 87%
8 AM 19° Mostly Cloudy 7% 5 mph W 86%
15-Day Forecast
Today
7/21
Clear
3%
19°
27°
Wed
7/22
Partly Cloudy
7%
19°
26°
Thu
7/23
Mostly Clear
3%
19°
28°
Fri
7/24
Partly Cloudy
14%
19°
28°
Sat
7/25
Clear
3%
21°
29°
Sun
7/26
Clear
3%
21°
29°
Mon
7/27
Clear
8%
21°
28°
Tue
7/28
Clear
18%
20°
28°
Wed
7/29
Clear
19%
21°
29°
Thu
7/30
Clear
21%
22°
31°
Fri
7/31
Clear
25%
22°
27°
Sat
8/1
Clear
3%
22°
26°
Sun
8/2
Clear
3%
22°
26°
Mon
8/3
Clear
3%
22°
26°
Tue
8/4
Clear
25%
22°
26°
52
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
52 AQI 9.9 µg/m³
O3
Ground-level ozone
36 AQI 39 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Wed 52 Moderate 36 52
Thu 52 Moderate 29 52
Fri 60 Moderate 38 60
About the Air Quality Index
0–50 Good
51–100 Moderate
101–150 Unhealthy for Sensitive Groups
151–200 Unhealthy
201–300 Very Unhealthy
301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Tue Jul 21, 15:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE0 J/kg
MLCAPE20 J/kg
MUCAPE0 J/kg
SBCIN-6531 J/kg
MLCIN0 J/kg
Lifted Index3.3
Kinematics
0–6 km Shear3 kt
0–1 km Shear10 kt
Eff. Shear—
0–1 km SRH-15
0–3 km SRH-10
Eff. SRH—
Storm Motion284° @ 19 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado-0.0
STP (eff)—
Supercell—
K-Index25.0
Thermo & Levels
PWAT1.58 in
0–3 km LR3.7 °C/km
700–500 LR6.4 °C/km
Total Totals38.3
LCL937 hPa
LFC—
EL—
Freezing Lvl16,198 ft