Model estimate for 4:00 AM PDT (no recent station report)
Simi Valley, CA weather
Mostly cloudy and 50°10°, 9°5° colder than a typical Oct 23.
Today: low 48°9° (likely 48°9° to 55°13°), high 73°23° (likely 66°19° to 73°23°).
Now 50°10°
Mostly cloudy
- Wind
- 5 mph8 km/h
- From the east-southeast. Up to 5 mph8 km/h through 4 PM
- Dew point
- 50°10°
- Comfortable
- Humidity
- 100%
- Air 50°10°, dew point 50°10° · fog or dew likely
- UV index
- 0Low
- Moderate 11 AM–4 PM · peak 5
- Air quality
- 22Good
- Main pollutant: Ozone
Next 2 hours
None rain starting around 7:15 AM.
From forecast models
Next 48 hours
TonightNear 52°11° · Mostly cloudy
This morningUp to 66°19° by 11 AM · rain chance 10% · Partly cloudy
This afternoonUp to 73°23° by 2 PM · rain chance 10% · Partly cloudy
TonightDown to 52°11° by 4 AM · Clear
Tomorrow morningUp to 70°21° by 11 AM · Clear
Tomorrow afternoonUp to 77°25° by 2 PM · Clear
Tomorrow nightDown to 53°12° by midnight · Clear
| Hour | Conditions | Temperature | Feels like | Precipitation | Wind | Humidity | Cloud cover | UV index |
|---|---|---|---|---|---|---|---|---|
| Fri 4a | Mostly cloudy | 50°10° (likely 50°10° to 56°13°) | 49°9° | 10% | 5 mph8 km/h from ESE, gusts 4 mph6 km/h | 100% | 50% | 0 |
| Fri 5a | Partly cloudy | 53°12° (likely 53°12° to 56°13°) | 53°12° | 0% | 0 mph0 km/h, gusts 4 mph7 km/h | 100% | 73% | 0 |
| Fri 6a | Cloudy | 48°9° (likely 48°9° to 57°14°) | 48°9° | 0% | 0 mph0 km/h, gusts 5 mph8 km/h | 100% | 83% | 0 |
| Fri 7a | Partly sunny | 48°9° (likely 48°9° to 56°13°) | 48°9° | 0% | 0 mph0 km/h, gusts 6 mph9 km/h | 100% | 58% | 0 |
| Fri 8a | Sunny | 55°13° (likely 55°13° to 57°14°) | 55°13° | 0% | 5 mph8 km/h from ENE, gusts 6 mph9 km/h | 100% | 37% | 0 |
| Fri 9a | Partly sunny | 58°14° (likely 58°14° to 61°16°) | 58°14° | 0% | 5 mph8 km/h from ENE, gusts 4 mph6 km/h | 94% | 22% | 1 |
| Fri 10a | Partly sunny | 61°16° (likely 60°16° to 64°18°) | 61°16° | 0% | 5 mph8 km/h from ENE, gusts 3 mph4 km/h | 79% | 28% | 2 |
| Fri 11a | Partly sunny | 66°19° (likely 62°17° to 66°19°) | 66°19° | 10% | 5 mph8 km/h from S, gusts 3 mph5 km/h | 64% | 39% | 3 |
| Fri 12p | Partly sunny | 68°20° (likely 64°18° to 68°20°) | 68°20° | 10% | 5 mph8 km/h from S, gusts 4 mph7 km/h | 55% | 44% | 4 |
| Fri 1p | Partly sunny | 70°21° (likely 65°18° to 70°21°) | 70°21° | 10% | 5 mph8 km/h from S, gusts 6 mph9 km/h | 52% | 34% | 5 |
| Fri 2p | Partly sunny | 73°23° (likely 66°19° to 73°23°) | 73°23° | 10% | 5 mph8 km/h from WSW, gusts 7 mph11 km/h | 52% | 38% | 4 |
| Fri 3p | Mostly sunny | 71°22° (likely 65°18° to 71°22°) | 71°22° | 10% | 5 mph8 km/h from WSW, gusts 9 mph15 km/h | 54% | 43% | 3 |
| Fri 4p | Mostly sunny | 69°21° (likely 65°18° to 70°21°) | 69°21° | 10% | 5 mph8 km/h from WSW, gusts 10 mph17 km/h | 54% | 35% | 1 |
| Fri 5p | Mostly sunny | 67°19° (likely 63°17° to 70°21°) | 67°19° | 5% | 5 mph8 km/h from W, gusts 10 mph16 km/h | 75% | 53% | 1 |
| Fri 6p | Clear | 60°16° (likely 60°16° to 67°19°) | 60°16° | 5% | 5 mph8 km/h from W, gusts 9 mph15 km/h | 79% | 19% | 0 |
| Fri 7p | Clear | 58°14° (likely 58°14° to 64°18°) | 58°14° | 5% | 5 mph8 km/h from W, gusts 16 mph25 km/h | 85% | 1% | 0 |
| Fri 8p | Clear | 58°14° (likely 56°13° to 63°17°) | 58°14° | 5% | 10 mph16 km/h from N, gusts 14 mph22 km/h | 88% | 0% | 0 |
| Fri 9p | Clear | 56°13° (likely 55°13° to 61°16°) | 56°13° | 5% | 10 mph16 km/h from N, gusts 7 mph11 km/h | 94% | 0% | 0 |
| Fri 10p | Clear | 56°13° (likely 54°12° to 61°16°) | 56°13° | 5% | 10 mph16 km/h from N, gusts 6 mph10 km/h | 94% | 0% | 0 |
| Fri 11p | Clear | 56°13° (likely 54°12° to 61°16°) | 56°13° | 0% | 10 mph16 km/h from NNE, gusts 6 mph10 km/h | 96% | 0% | 0 |
| Sat 12a | Clear | 56°13° (likely 53°12° to 61°16°) | 56°13° | 0% | 10 mph16 km/h from NNE, gusts 6 mph10 km/h | 96% | 0% | 0 |
| Sat 1a | Clear | 54°12° (likely 53°12° to 59°15°) | 54°12° | 0% | 10 mph16 km/h from NNE, gusts 6 mph10 km/h | 92% | 0% | 0 |
| Sat 2a | Clear | 56°13° (likely 53°12° to 58°14°) | 56°13° | 0% | 10 mph16 km/h from NNE, gusts 6 mph9 km/h | 89% | 0% | 0 |
| Sat 3a | Clear | 54°12° (likely 52°11° to 58°14°) | 54°12° | 0% | 10 mph16 km/h from NNE, gusts 5 mph9 km/h | 89% | 0% | 0 |
| Sat 4a | Clear | 52°11° (likely 52°11° to 59°15°) | 52°11° | 0% | 10 mph16 km/h from NNE, gusts 6 mph9 km/h | 87% | 0% | 0 |
| Sat 5a | Clear | 52°11° (likely 52°11° to 58°14°) | 52°11° | 0% | 15 mph24 km/h from NNE, gusts 6 mph10 km/h | 85% | 0% | 0 |
| Sat 6a | Clear | 50°10° (likely 50°10° to 59°15°) | 45°7° | 0% | 15 mph24 km/h from NNE, gusts 6 mph10 km/h | 86% | 0% | 0 |
| Sat 7a | Sunny | 50°10° (likely 50°10° to 59°15°) | 45°7° | 0% | 15 mph24 km/h from NNE, gusts 6 mph10 km/h | 86% | 0% | 0 |
| Sat 8a | Sunny | 54°12° (likely 54°12° to 61°16°) | 54°12° | 0% | 15 mph24 km/h from NE, gusts 8 mph13 km/h | 81% | 0% | 0 |
| Sat 9a | Sunny | 61°16° (likely 59°15° to 68°20°) | 61°16° | 0% | 15 mph24 km/h from NE, gusts 20 mph31 km/h | 70% | 0% | 1 |
| Sat 10a | Sunny | 66°19° (likely 65°18° to 72°22°) | 66°19° | 0% | 15 mph24 km/h from NE, gusts 20 mph33 km/h | 58% | 0% | 3 |
| Sat 11a | Sunny | 70°21° (likely 69°21° to 75°24°) | 70°21° | 0% | 20 mph32 km/h from NE, gusts 22 mph35 km/h | 46% | 0% | 4 |
| Sat 12p | Sunny | 72°22° (likely 71°22° to 77°25°) | 72°22° | 0% | 20 mph32 km/h from NE, gusts 22 mph35 km/h | 40% | 0% | 5 |
| Sat 1p | Sunny | 74°23° (likely 73°23° to 79°26°) | 74°23° | 0% | 20 mph32 km/h from NE, gusts 20 mph32 km/h | 37% | 0% | 5 |
| Sat 2p | Sunny | 77°25° (likely 74°23° to 80°27°) | 77°25° | 0% | 10 mph16 km/h from NNE, gusts 16 mph26 km/h | 36% | 0% | 5 |
| Sat 3p | Sunny | 76°24° (likely 74°23° to 81°27°) | 76°24° | 0% | 10 mph16 km/h from NNE, gusts 14 mph23 km/h | 37% | 0% | 4 |
| Sat 4p | Sunny | 76°24° (likely 73°23° to 81°27°) | 76°24° | 0% | 10 mph16 km/h from NNE, gusts 13 mph20 km/h | 38% | 0% | 3 |
| Sat 5p | Sunny | 75°24° (likely 72°22° to 79°26°) | 75°24° | 0% | 5 mph8 km/h from NNE, gusts 11 mph17 km/h | 46% | 1% | 2 |
| Sat 6p | Clear | 69°21° (likely 67°19° to 73°23°) | 69°21° | 0% | 5 mph8 km/h from NNE, gusts 10 mph17 km/h | 56% | 0% | 0 |
| Sat 7p | Clear | 65°18° (likely 62°17° to 68°20°) | 65°18° | 0% | 5 mph8 km/h from NNE, gusts 8 mph13 km/h | 63% | 0% | 0 |
| Sat 8p | Clear | 62°17° (likely 59°15° to 66°19°) | 62°17° | 0% | 5 mph8 km/h from NNW, gusts 4 mph6 km/h | 69% | 0% | 0 |
| Sat 9p | Clear | 60°16° (likely 57°14° to 64°18°) | 60°16° | 0% | 5 mph8 km/h from NNW, gusts 4 mph7 km/h | 74% | 0% | 0 |
| Sat 10p | Clear | 57°14° (likely 55°13° to 64°18°) | 57°14° | 0% | 5 mph8 km/h from NNW, gusts 4 mph7 km/h | 77% | 0% | 0 |
| Sat 11p | Clear | 54°12° (likely 53°12° to 64°18°) | 54°12° | 0% | 10 mph16 km/h from NNE, gusts 5 mph8 km/h | 79% | 0% | 0 |
| Sun 12a | Clear | 53°12° (likely 50°10° to 62°17°) | 53°12° | 0% | 10 mph16 km/h from NNE, gusts 4 mph7 km/h | 78% | 0% | 0 |
| Sun 1a | Clear | 53°12° (likely 49°9° to 61°16°) | 53°12° | 0% | 10 mph16 km/h from NNE, gusts 5 mph7 km/h | 76% | 0% | 0 |
| Sun 2a | Clear | 53°12° (likely 48°9° to 61°16°) | 53°12° | 0% | 10 mph16 km/h from NNE, gusts 5 mph8 km/h | 74% | 0% | 0 |
| Sun 3a | Clear | 53°12° (likely 48°9° to 61°16°) | 53°12° | 0% | 10 mph16 km/h from NNE, gusts 5 mph8 km/h | 73% | 0% | 0 |
Days ahead
Today, Oct 23. Partly sunny. High 73°23°, low 48°9°. Typical 82°28° / 55°13°. Dry. Mostly agree.
Morning
6 AM–noon
Partly sunny, 55°13°Dry
Afternoon
noon–6 PM
Mostly sunny, 73°23°Dry
Evening
6 PM–midnight
Clear, 58°14°Dry
Overnight
midnight–6 AM
Clear, 52°11°Dry
Official NWS forecast
Today: Mostly sunny, with a high near 73. West wind 0 to 5 mph.
Tonight: Mostly cloudy, with a low around 48. East northeast wind 0 to 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 66°19°–73°23°
- Low, likely
- 48°9°–55°13°
- Typical high / low
- 82°28° / 55°13°
- Wind
- 9 mph14 km/h, gusts 25 mph41 km/h
- UV peak
- 5
Tomorrow, Oct 24. Sunny. High 77°25°, low 51°11°. Typical 81°27° / 55°13°. Dry. Forecasts differ.
Morning
6 AM–noon
Sunny, 54°12°Dry
Afternoon
noon–6 PM
Sunny, 77°25°Dry
Evening
6 PM–midnight
Clear, 62°17°Dry
Overnight
midnight–6 AM
Clear, 53°12°Dry
Official NWS forecast
Day: Sunny, with a high near 77. North northeast wind 5 to 20 mph, with gusts as high as 30 mph.
Night: Clear, with a low around 51. North wind 5 to 10 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 75°24°–81°27°
- Low, likely
- 51°11°–58°14°
- Typical high / low
- 81°27° / 55°13°
- Wind
- 17 mph28 km/h, gusts 34 mph55 km/h
- UV peak
- 5
Sunday, Oct 25. Mostly sunny. High 78°26°, low 52°11°. Typical 81°27° / 55°13°. Dry. Mostly agree.
Morning
6 AM–noon
Sunny, 56°13°Dry
Afternoon
noon–6 PM
Sunny, 78°25°Dry
Evening
6 PM–midnight
Clear, 63°17°Dry
Overnight
midnight–6 AM
Clear, 55°13°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 78.
Night: Mostly clear, with a low around 52.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 75°24°–80°27°
- Low, likely
- 49°9°–57°14°
- Typical high / low
- 81°27° / 55°13°
- Wind
- 10 mph16 km/h, gusts 16 mph26 km/h
- UV peak
- 5
Monday, Oct 26. Mostly sunny. High 79°26°, low 54°12°. Typical 81°27° / 54°12°. Dry. Mostly agree.
Morning
6 AM–noon
Sunny, 56°13°Dry
Afternoon
noon–6 PM
Sunny, 78°26°Dry
Evening
6 PM–midnight
Clear, 61°16°Dry
Overnight
midnight–6 AM
Clear, 54°12°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 79.
Night: Mostly clear, with a low around 54.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 75°24°–80°27°
- Low, likely
- 49°9°–58°14°
- Typical high / low
- 81°27° / 54°12°
- Wind
- 13 mph22 km/h, gusts 28 mph45 km/h
- UV peak
- 5
Tuesday, Oct 27. Mostly sunny. High 78°26°, low 53°12°. Typical 81°27° / 54°12°. Dry. Mostly agree.
Morning
6 AM–noon
Sunny, 55°13°Dry
Afternoon
noon–6 PM
Sunny, 76°25°Dry
Evening
6 PM–midnight
Clear, 60°16°Dry
Overnight
midnight–6 AM
Clear, 53°12°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 78.
Night: Partly cloudy, with a low around 53.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 73°23°–78°26°
- Low, likely
- 48°9°–56°13°
- Typical high / low
- 81°27° / 54°12°
- Wind
- 11 mph18 km/h, gusts 20 mph31 km/h
- UV peak
- 5
Wednesday, Oct 28. Partly sunny. High 75°24°, low 52°11°. Typical 81°27° / 54°12°. Dry. Forecasts differ.
Morning
6 AM–noon
Partly sunny, 54°12°Dry
Afternoon
noon–6 PM
Cloudy, 75°24°Dry
Evening
6 PM–midnight
Cloudy, 62°16°Dry
Overnight
midnight–6 AM
Clear, 54°12°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 75.
Night: Partly cloudy, with a low around 52.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 70°21°–80°27°
- Low, likely
- 48°9°–56°13°
- Typical high / low
- 81°27° / 54°12°
- Wind
- 11 mph18 km/h
- UV peak
- 4
Thursday, Oct 29. Cloudy. High 72°22°, low 54°12°. Typical 80°27° / 54°12°. Dry. Forecasts differ.
Morning
6 AM–noon
Sunny, 57°14°Dry
Afternoon
noon–6 PM
Cloudy, 71°22°Dry
Evening
6 PM–midnight
Clear, 60°16°Dry
Overnight
midnight–6 AM
Cloudy, 55°13°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 72.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 67°19°–74°23°
- Low, likely
- 50°10°–57°14°
- Typical high / low
- 80°27° / 54°12°
- Wind
- 10 mph17 km/h, gusts 18 mph28 km/h
- UV peak
- 5
Friday, Oct 30. Sunny. High 70°21°, low 54°12°. Typical 80°27° / 54°12°. Dry. Forecasts differ.
Morning
6 AM–noon
Sunny, 56°13°Dry
Afternoon
noon–6 PM
Sunny, 71°22°Dry
Evening
6 PM–midnight
Clear, 60°16°Dry
Overnight
midnight–6 AM
Cloudy, 55°13°Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 64°18°–72°22°
- Low, likely
- 48°9°–59°15°
- Typical high / low
- 80°27° / 54°12°
- Wind
- 7 mph11 km/h, gusts 19 mph31 km/h
- UV peak
- 5
Saturday, Oct 31. Cloudy. High 67°19°, low 54°12°. Typical 80°27° / 53°12°. Rain 0.5 in13 mm, 30% chance. Forecasts differ.
Morning
6 AM–noon
Cloudy, 59°15°20% chance · 0.05 in1.4 mm
Afternoon
noon–6 PM
Cloudy, 68°20°20% chance · 0.29 in7.4 mm
Evening
6 PM–midnight
Cloudy, 62°17°30% chance · 0.21 in5.4 mm
Overnight
midnight–6 AM
Drizzle, 59°15°40% chance · 0.13 in3.3 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
- High, likely
- 57°14°–75°24°
- Low, likely
- 52°11°–58°14°
- Typical high / low
- 80°27° / 53°12°
- Wind
- 10 mph17 km/h, gusts 18 mph29 km/h
- UV peak
- 4
Sunday, Nov 1. Cloudy. High 69°21°, low 57°14°. Typical 80°27° / 53°12°. Rain 0.49 in12 mm, 40% chance. Mostly agree.
Morning
6 AM–noon
Cloudy, 60°16°40% chance · 0.28 in7 mm
Afternoon
noon–6 PM
Cloudy, 69°21°40% chance · 0.02 in0.6 mm
Evening
6 PM–midnight
Cloudy, 65°19°40% chance
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 67°19°–72°22°
- Low, likely
- 52°11°–60°16°
- Typical high / low
- 80°27° / 53°12°
- Wind
- 11 mph18 km/h, gusts 31 mph50 km/h
- UV peak
- 3
The outlook
Today
Dry, high 73°, low 48°.
Tomorrow
Dry, high 77°, low 51°, warming up.
Sunday
Dry, high 78°, low 52°.
Rest of week
Mostly dry, highs 67–79°.
Want the meteorologists’ reasoning? Read the NWS forecast discussion (LOX) (opens in a new tab)
What changed since yesterday
No meaningful changes from yesterday’s forecast.
Radar
For your home
What this week’s weather means for heating, cooling, pipes and fresh air.
Heating this week
Heating degree days, base 65°F
Comfort
Dry air outside (dew point 50°F).
Open the windows?
Today, 10:00 AM–6:00 PM
Good stretch to open the windows.
Is this typical?
Oct 23, today vs a typical year
Today’s expected high is 9°5° colder than typical.
- Normal high / low
- 82°28° / 55°13°
- Forecast high / low
- 73°23° / 48°9°
- Record high
- 104°40° in 2017
- Record low
- 37°3° in 1949
Last 7 days vs normal
On average 4°2° warmer than normal (daily mean temperature).
- +11°+6°SatOct 17
- +6°+3°SunOct 18
- +5°+3°MonOct 19
- +2°+1°TueOct 20
- −5°−3°WedOct 21
- —ThuOct 22
- —FriOct 23
Simi Valley weather by month: normals, records, snow and freeze dates
Sun & moon
Sun
Sunrise 7:07 AM, sunset 6:10 PM.
- Daylight
- 11 h 4 min
- Losing 1 min 57 s a day; shortest Dec 21, 1 h 12 min less
- Golden hour
- 5:36–6:26 PM
- Morning 6:51–7:41 AM
- Blue hour
- 6:26–6:36 PM
- Morning 6:41–6:51 AM; first light 6:41 AM
Stars tonight? Poor
Clouds most of the night (about 69% cover).
Moon
Waxing gibbous
91% lit · growing
- Today
- sets 4:26 AM · rises 4:39 PM
- Full moon
- Oct 25
- New moon
- Nov 8
