🇺🇸 Weather in Simi Valley
Map Overlays:
Hourly Forecast for Simi Valley
05:00
13°
26%
06:00
13°
36%
07:00
15°
23%
08:00
18°
6%
09:00
22°
1%
10:00
25°
0%
11:00
27°
0%
12:00
29°
0%
13:00
30°
0%
14:00
30°
0%
15:00
30°
0%
16:00
30°
0%
17:00
29°
0%
18:00
27°
0%
19:00
23°
0%
20:00
20°
1%
21:00
18°
1%
22:00
17°
1%
23:00
17°
1%
00:00
16°
1%
01:00
16°
2%
02:00
15°
2%
03:00
15°
3%
04:00
14°
3%
14-Day Forecast for Simi Valley
2026-06-04
Sunny
31° /
12°
2026-06-05
Sunny
32° /
14°
2026-06-06
Overcast
28° /
14°
2026-06-07
Sunny
27° /
11°
2026-06-08
Sunny
29° /
12°
2026-06-09
Sunny
27° /
12°
2026-06-10
Sunny
25° /
14°
Additional Forecasts for Simi Valley
Air Quality
💨 US EPA Index 2 (Moderate)
CO (Carbon Monoxide) 162.0 μg/m³
O₃ (Ozone) 24.0 μg/m³
NO₂ (Nitrogen Dioxide) 20.6 μg/m³
SO₂ (Sulphur Dioxide) 0.7 μg/m³
PM2.5 (Fine particles) 15.7 μg/m³
PM10 (Coarse particles) 22.0 μg/m³
Historical Weather
Weather Forecasts for Other Cities in United States
Weather in Simi Valley — FAQ
Answers refreshed each request based on current conditions in Simi Valley.
What is the weather like right now in Simi Valley?
Right now in Simi Valley, United States the temperature is 15.2°C (feels like 15.2°C), with clear. Relative humidity is 90% and wind is 3.6 km/h.
What is today's high and low temperature in Simi Valley?
Today's forecast high in Simi Valley is 31.0°C and the overnight low is 12.5°C. The diurnal range — high minus low — depends on cloud cover; clear days swing more than overcast ones.
Will it rain in Simi Valley today?
The chance of precipitation in Simi Valley today is 1%. Forecast accuracy is highest within the next 6 hours and decreases steadily out to 14 days.
How often does the weather here update?
Current observations refresh every 15-60 minutes from the nearest monitoring stations operated by national meteorological agencies. The hourly forecast updates approximately every hour; the 7- and 14-day outlook is recomputed several times per day.
What does 'feels like' temperature mean?
Feels-like (apparent) temperature accounts for humidity, wind chill and direct sunshine — variables that change how the human body perceives heat or cold. On hot, humid days it can be 3-7°C above the actual reading; on cold windy days it can be 5-15°C below.
Why does the temperature in Simi Valley differ from nearby cities?
Even short distances can change temperatures noticeably. Simi Valley's reading reflects altitude, proximity to large bodies of water, urban heat island effects, and the exact location of the monitoring stations supplying the data. Coastal cities are typically milder and more humid than inland equivalents.