Walnut, CA Weather Forecast
Local 7-day forecast
Patchy Fog then Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Walnut, CA in one place.
Patchy fog before 11am. Mostly sunny, with a high near 80. South southwest wind 5 to 10 mph.
Local Weather Overview
This forecast page for Walnut, 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: Sep 16, 2026 8:52 PM PDT.
The active forecast window currently covers Sep 17 to Sep 23, 2026 for Walnut, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 17 to Sep 23, 2026
- Latest sync
- Sep 16, 2026 8:52 PM PDT
- Forecast office
- LOX
- Source
- NOAA / NWS
Daily Outlook
This Week in Walnut
Wednesday looks like the warmest upcoming period in Walnut at 86 degrees F.
Thursday Night is the coolest period ahead with temperatures near 61 degrees F.
The strongest winds are forecast for Thursday at about 5 to 10 mph SSW.
The forecast from Sep 17 through Sep 23 stays mostly dry.
Forecast Details
- Last updated
- Sep 16, 2026 8:52 PM PDT
- Coverage
- 7 days
- Time zone
- America/Los_Angeles
- Forecast office
- LOX
- Radar station
- KSOX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Partly cloudy, with a low around 61. South southwest wind 5 to 10 mph.
Sunny, with a high near 82. South southwest wind 5 to 10 mph.
Patchy fog after 5am. Partly cloudy, with a low around 62. South southeast wind 0 to 10 mph.
Patchy fog before 11am. Mostly sunny, with a high near 85.
Mostly clear, with a low around 63.
Mostly sunny, with a high near 83.
Partly cloudy, with a low around 63.
Mostly sunny, with a high near 82.
Mostly clear, with a low around 62.
Sunny, with a high near 84.
Mostly clear, with a low around 62.
Sunny, with a high near 86.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Sep 17
|
Patchy Fog then Mostly Sunny
|
80°F |
5 to 10 mph
SSW
|
|
Thursday Night
Sep 17
|
Partly Cloudy
|
61°F |
5 to 10 mph
SSW
|
|
Friday
Sep 18
|
Sunny
|
82°F |
5 to 10 mph
SSW
|
|
Friday Night
Sep 18
|
Partly Cloudy then Patchy Fog
|
62°F |
0 to 10 mph
SSE
|
|
Saturday
Sep 19
|
Patchy Fog then Mostly Sunny
|
85°F |
0 to 10 mph
SSW
|
|
Saturday Night
Sep 19
|
Mostly Clear
|
63°F |
0 to 10 mph
S
|
|
Sunday
Sep 20
|
Mostly Sunny
|
83°F |
0 to 10 mph
SSW
|
|
Sunday Night
Sep 20
|
Partly Cloudy
|
63°F |
0 to 10 mph
SSW
|
|
Monday
Sep 21
|
Mostly Sunny
|
82°F |
0 to 10 mph
SSW
|
|
Monday Night
Sep 21
|
Mostly Clear
|
62°F |
0 to 10 mph
SSW
|
|
Tuesday
Sep 22
|
Sunny
|
84°F |
0 to 10 mph
SW
|
|
Tuesday Night
Sep 22
|
Mostly Clear
|
62°F |
0 to 10 mph
SSW
|
|
Wednesday
Sep 23
|
Sunny
|
86°F |
0 to 10 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Walnut.
