Simi Valley, California Weather:
Active Weather Warnings
Wednesday, July 22, 2026
Sunny Weather
Day 90°
Night 64°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 11
Weather Forecast History
Last Year's Weather on This Day (July 22, 2025)
Night

Day

75°

Night

55°

Wind

7 mph

Precipitation

0 %

Weather Alerts and Warnings for

Severe Future Likely

Extreme Heat Watch

Extreme Heat Watch issued July 21 at 12:11AM PDT until July 27 at 8:00PM PDT by NWS Los Angeles/Oxnard CA
Jul 22, 8:00 PM Jul 27, 8:00 PM
WHAT: For the Heat Advisory, temperatures between 93 to 103
expected. For the Extreme Heat Watch, dangerously hot conditions
with temperatures between 97 and 107 possible.

WHERE: A portion of southwest California.

WHEN: For the Heat Advisory, from 10 AM to 8 PM PDT Wednesday.
For the Extreme Heat Watch, from Wednesday evening through Monday
evening.

IMPACTS: There is a high risk for dangerous heat illness for
anyone, especially for the very young, the very old, those without
air conditioning, and those active outdoors. There is a high risk
for heat illness for sensitive populations including the very
young, the very old, those without air conditioning, and those
active outdoors.
+ Read More
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
Updated: Jul 21, 1:16 AM Source: NWS Alert
Moderate Expected Likely

Heat Advisory

Heat Advisory issued July 21 at 12:11AM PDT until July 22 at 8:00PM PDT by NWS Los Angeles/Oxnard CA
Jul 22, 10:00 AM Jul 22, 8:00 PM
WHAT: For the Heat Advisory, temperatures between 93 to 103
expected. For the Extreme Heat Watch, dangerously hot conditions
with temperatures between 97 and 107 possible.

WHERE: A portion of southwest California.

WHEN: For the Heat Advisory, from 10 AM to 8 PM PDT Wednesday.
For the Extreme Heat Watch, from Wednesday evening through Monday
evening.

IMPACTS: There is a high risk for dangerous heat illness for
anyone, especially for the very young, the very old, those without
air conditioning, and those active outdoors. There is a high risk
for heat illness for sensitive populations including the very
young, the very old, those without air conditioning, and those
active outdoors.
+ Read More
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
Updated: Jul 21, 1:16 AM Source: NWS Alert