Heat Advisory — Santa Clarita Valley, CA, Santa Lucia Mountains, CA, Southern Salinas Valley, CA, Santa Ynez Valley, CA, Santa Barbara County Southwestern Coast, CA, Santa Ynez Mountains Western Range, CA, Santa Ynez Mountains Eastern Range, CA, Lake Casitas, CA, Ojai Valley, CA, Central Ventura County Valleys, CA, Palos Verdes Hills, CA, Los Angeles County Inland Coast including Downtown Los Angeles, CA, Western Santa Monica Mountains Recreational Area, CA, Eastern Santa Monica Mountains Recreational Area, CA, Calabasas and Agoura Hills, CA, Western San Fernando Valley, CA, Eastern San Fernando Valley, CA, Southeastern Ventura County Valleys, CA, Los Angeles County San Gabriel Valley, CA 10:00 PM

Fountain Valley, California

Last updated: 2:20 AM CDT  ·  Refresh
22°C
Feels like 23°
Mostly Clear
▲ 29°  /  ▼ 20°
Wind
4 mph WSW
Humidity
81%
Dew Point
19°
Pressure
29.90 inHg
Visibility
8 mi
UV Index
0.0
Cloud Cover
20%
Sunrise
6:08 AM
Sunset
7:45 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Fountain Valley is currently mostly clear at 22°C. Dry conditions are expected through the next 24 hours. Sunrise: 6:08AM · Sunset: 7:45PM.

Alerts

Heat Advisory
Santa Clarita Valley, CA, Santa Lucia Mountains, CA, Southern Salinas Valley, CA, Santa Ynez Valley, CA, Santa Barbara County Southwestern Coast, CA, Santa Ynez Mountains Western Range, CA, Santa Ynez Mountains Eastern Range, CA, Lake Casitas, CA, Ojai Valley, CA, Central Ventura County Valleys, CA, Palos Verdes Hills, CA, Los Angeles County Inland Coast including Downtown Los Angeles, CA, Western Santa Monica Mountains Recreational Area, CA, Eastern Santa Monica Mountains Recreational Area, CA, Calabasas and Agoura Hills, CA, Western San Fernando Valley, CA, Eastern San Fernando Valley, CA, Southeastern Ventura County Valleys, CA, Los Angeles County San Gabriel Valley, CA
Expires 10:00 PM
54 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
22°
5%
1 AM
22°
5%
2 AM
21°
7%
3 AM
21°
9%
4 AM
21°
3%
5 AM
19°
3%
6 AM
19°
3%
7 AM
20°
3%
8 AM
21°
3%
9 AM
21°
3%
10 AM
23°
3%
11 AM
23°
3%
12 PM
24°
3%
1 PM
27°
3%
2 PM
27°
3%
3 PM
27°
3%
4 PM
27°
3%
5 PM
29°
3%
6 PM
28°
3%
7 PM
26°
7%
8 PM
25°
6%
9 PM
23°
6%
10 PM
23°
6%
11 PM
22°
6%
7-Day Forecast
Today
29° 20°
Mostly Clear.
Sun
28° 20°
Partly Cloudy.
Mon
27° 19°
Partly Cloudy.
Tue
29° 19°
Mostly Cloudy.
Wed
28° 19°
Clear.
Thu
27° 18°
Clear.
Fri
27° 18°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 22° Mostly Clear 5% 4 mph WSW 81%
1 AM 22° Mostly Clear 5% 4 mph W 81%
2 AM 21° Mostly Clear 7% 4 mph W 84%
3 AM 21° Partly Cloudy 9% 3 mph WNW 85%
4 AM 21° Partly Cloudy 3% 2 mph WNW 86%
5 AM 19° Partly Cloudy 3% 2 mph WNW 85%
6 AM 19° Partly Cloudy 3% 2 mph W 84%
7 AM 20° Partly Cloudy 3% 2 mph W 82%
8 AM 21° Partly Cloudy 3% 2 mph W 78%
9 AM 21° Partly Cloudy 3% 4 mph W 72%
10 AM 23° Mostly Clear 3% 5 mph WSW 67%
11 AM 23° Mostly Clear 3% 7 mph WSW 63%
12 PM 24° Mostly Clear 3% 9 mph W 60%
1 PM 27° Mostly Clear 3% 10 mph W 57%
2 PM 27° Mostly Clear 3% 11 mph W 56%
3 PM 27° Mostly Clear 3% 11 mph W 56%
4 PM 27° Mostly Clear 3% 12 mph W 56%
5 PM 29° Mostly Clear 3% 11 mph W 58%
6 PM 28° Mostly Clear 3% 10 mph W 63%
7 PM 26° Mostly Clear 7% 9 mph W 68%
8 PM 25° Mostly Clear 6% 8 mph W 72%
9 PM 23° Mostly Clear 6% 8 mph WSW 74%
10 PM 23° Mostly Clear 6% 7 mph WSW 76%
11 PM 22° Mostly Clear 6% 7 mph WSW 78%
15-Day Forecast
Today
8/8
Mostly Clear
9%
20°
29°
Sun
8/9
Partly Cloudy
6%
20°
28°
Mon
8/10
Partly Cloudy
6%
19°
27°
Tue
8/11
Mostly Cloudy
10%
19°
29°
Wed
8/12
Clear
8%
19°
28°
Thu
8/13
Clear
3%
18°
27°
Fri
8/14
Clear
8%
18°
27°
Sat
8/15
Clear
18%
18°
28°
Sun
8/16
Clear
3%
18°
29°
Mon
8/17
Clear
21%
19°
30°
Tue
8/18
Clear
25%
21°
28°
Wed
8/19
Clear
25%
21°
23°
Thu
8/20
Clear
3%
21°
23°
Fri
8/21
Clear
25%
21°
24°
Sat
8/22
Clear
25%
22°
24°
54
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
54 AQI 10.8 µg/m³
O3
Ground-level ozone
42 AQI 46 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 54 Moderate 42 54
Sun 59 Moderate 45 59
Mon 54 Moderate 40 54
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 Sat Aug 8, 06:00'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
MLCAPE39 J/kg
MUCAPE0 J/kg
SBCIN-6833 J/kg
MLCIN0 J/kg
Lifted Index4.8
Kinematics
0–6 km Shear7 kt
0–1 km Shear3 kt
Eff. Shear—
0–1 km SRH8
0–3 km SRH-50
Eff. SRH—
Storm Motion99° @ 15 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index23.9
Thermo & Levels
PWAT1.19 in
0–3 km LR2.0 °C/km
700–500 LR6.8 °C/km
Total Totals41.7
LCL976 hPa
LFC—
EL—
Freezing Lvl17,415 ft