O'Brien, CA Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for O'Brien, CA in one place.
Mostly sunny. High near 73, with temperatures falling to around 70 in the afternoon. North northwest wind 1 to 7 mph.
Local Weather Overview
This forecast page for O'Brien, CA is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Nov 5, 2026 3:12 PM PST.
The active forecast window currently covers Nov 6 to Nov 11, 2026 for O'Brien, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Nov 6 to Nov 11, 2026
- Latest sync
- Nov 5, 2026 3:12 PM PST
- Forecast office
- STO
- Source
- NOAA / NWS
Daily Outlook
This Week in O'Brien
Friday looks like the warmest upcoming period in O'Brien at 73 degrees F.
Saturday Night is the coolest period ahead with temperatures near 48 degrees F.
The strongest winds are forecast for Friday at about 1 to 7 mph NNW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Nov 5, 2026 3:12 PM PST
- Coverage
- 7 days
- Time zone
- America/Los_Angeles
- Forecast office
- STO
- Radar station
- KMAX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 50. North northwest wind 2 to 7 mph.
Mostly sunny, with a high near 68. East wind around 5 mph.
Mostly clear, with a low around 48.
Mostly sunny, with a high near 67.
Partly cloudy, with a low around 49.
Mostly sunny, with a high near 64.
Mostly clear, with a low around 49.
Mostly sunny, with a high near 67.
A slight chance of rain after 4am. Partly cloudy, with a low around 50.
A chance of rain. Mostly sunny, with a high near 63.
A chance of rain. Mostly cloudy, with a low around 49.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Nov 6
|
Mostly Sunny
|
73°F |
1 to 7 mph
NNW
|
|
Friday Night
Nov 6
|
Mostly Clear
|
50°F |
2 to 7 mph
NNW
|
|
Saturday
Nov 7
|
Mostly Sunny
|
68°F |
5 mph
E
|
|
Saturday Night
Nov 7
|
Mostly Clear
|
48°F |
5 mph
E
|
|
Sunday
Nov 8
|
Mostly Sunny
|
67°F |
1 to 6 mph
NNW
|
|
Sunday Night
Nov 8
|
Partly Cloudy
|
49°F |
3 mph
N
|
|
Monday
Nov 9
|
Mostly Sunny
|
64°F |
1 to 5 mph
E
|
|
Monday Night
Nov 9
|
Mostly Clear
|
49°F |
3 mph
N
|
|
Tuesday
Nov 10
|
Mostly Sunny
|
67°F |
1 to 5 mph
NNE
|
|
Tuesday Night
Nov 10
|
Partly Cloudy then Slight Chance Light Rain
|
50°F |
3 mph
N
|
|
Veterans Day
Nov 11
|
Chance Light Rain
|
63°F |
3 mph
ESE
|
|
Wednesday Night
Nov 11
|
Chance Light Rain
|
49°F |
3 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around O'Brien.