Simi Valley and its surrounding mountains

Weather · August

Simi Valley weather in August

Average highs of 97°F, lows of 61°F and 0.00 in of rain, from 30 years of weather records.

August is Simi Valley’s warmest month, with average highs of 97°F and lows of 61°F. That is 2° warmer than July, and 16° above the yearly average high.

Average high
97°F
Average low
61°F
Precipitation
0.00 in
Wet days
0
Sunrise · sunset
6:16 AM · 7:43 PM

August across the year

  1. 70°43°Jan
  2. 70°44°Feb
  3. 74°46°Mar
  4. 78°48°Apr
  5. 82°53°May
  6. 89°57°Jun
  7. 95°61°Jul
  8. 97°61°Aug
  9. 94°59°Sep
  10. 85°53°Oct
  11. 76°46°Nov
  12. 69°42°Dec

High and low Rain

What to wear in August

  • Hot days: light, breathable clothes, a sun hat, sunscreen and plenty of water for anything outdoors.

August is good for

  • Early-morning or evening outings, with indoor plans for the afternoon heat

Around Simi Valley

Tree One, Simi Valley
Tree Onezoltansoos · CC BY-SA 3.0
View from a trail in Oak Park, Simi Valley
Oak-Park-Simi-ValleyUser:Niceley · CC BY-SA 4.0
Simi Adobe, Simi Valley
Simi Adobe, Simi ValleyLos Angeles · CC BY-SA 3.0

See Simi Valley

A look around town before you go.

August compared with the months around it

MonthHighLowRain
July95°F61°F0.00 in
August97°F61°F0.00 in
September94°F59°F0.10 in

Planning a trip? See the best time to visit Simi Valley and today’s forecast.

Questions

How hot does it get in Simi Valley in August?

Average highs are 97°F and average lows 61°F, for a daily mean of 79°F. Individual days run hotter or colder than these 30-year averages.

Does it rain in Simi Valley in August?

August averages 0.00 in of precipitation over about 0 days with at least 0.01 in. It is the 12th wettest month of the year.

What time is sunset in Simi Valley in August?

Around mid-August the sun rises about 6:16 AM and sets about 7:43 PM, for roughly 13.5 hours of daylight.

Is August a good time to visit Simi Valley?

The mildest months for visiting are April, May, November. August is hot.

NOAA U.S. Climate Normals 1991–2020, Woodland Hills Pierce College station (11.3 mi from downtown). Sunrise and sunset are calculated for August 15 at the city’s coordinates.

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