Current Conditions

Walnut Creek, California

65°F18°C
Partly Cloudy

Wind

SW 5 mph8 km/h

Humidity

71%

Cloud Cover

67%

As of Tuesday, September 22, 2026 at 9:40 AM PDT

Today's Outlook

Day

Partly cloudy and warm, with a high of 72°F22°C and morning low of 58°F14°C. Breezy from the SW at 6 to 8 mph10 to 12 km/h.

Night

Partly cloudy, with a low around 57°F14°C. Light wind from the SW around 6 mph9 km/h.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
Partly CloudyHigh 72°F22°CLow 57°F14°CPrecip 0 in0 mmCloud 42%Wind SW 6 mph10 km/hTuesday: Partly cloudy and warm, with a high of 72°F22°C and morning low of 58°F14°C. Breezy from the SW at 6 to 8 mph10 to 12 km/h. Tuesday Night: Partly cloudy, with a low around 57°F14°C. Light wind from the SW around 6 mph9 km/h.
ClearHigh 85°F30°CLow 56°F13°CPrecip 0 in0 mmCloud 31%Wind WSW 3 mph5 km/hWednesday: Partly cloudy and warm, with a high of 85°F30°C and morning low of 57°F14°C. Light wind from the NW around 3 mph4 km/h. Wednesday Night: Partly cloudy, with a low around 56°F13°C. Light wind from the SW around 4 mph6 km/h.
Partly CloudyHigh 82°F28°CLow 58°F14°CPrecip 0 in0 mmCloud 54%Wind SW 6 mph9 km/hThursday: Mostly cloudy and warm, with a high of 82°F28°C and morning low of 59°F15°C. Breezy from the WSW at 6 to 10 mph10 to 16 km/h. Thursday Night: Partly cloudy, with a low around 58°F14°C. Breezy from the SW at 5 to 7 mph8 to 12 km/h.
ClearHigh 77°F25°CLow 59°F15°CPrecip 0 in0 mmCloud 33%Wind WSW 7 mph11 km/hFriday: Partly cloudy and warm, with a high of 77°F25°C and morning low of 62°F17°C. Breezy from the WSW at 8 to 9 mph14 to 15 km/h. Friday Night: Partly cloudy, with a low around 59°F15°C. Breezy from the SW at 6 to 7 mph9 to 11 km/h.
ClearHigh 77°F25°CLow 54°F12°CPrecip 0 in0 mmCloud 34%Wind WSW 5 mph8 km/hSaturday: Partly cloudy and warm, with a high of 77°F25°C and morning low of 56°F13°C. Breezy from the WSW at 5 to 8 mph8 to 12 km/h. Saturday Night: Partly cloudy, with a low around 54°F12°C. Light wind from the SW around 5 mph8 km/h.
ClearHigh 75°F24°CLow 55°F13°CPrecip 0 in0.1 mm3%Cloud 25%Wind WSW 7 mph11 km/hSunday: Mostly clear and warm, with a high of 75°F24°C and morning low of 58°F14°C. Breezy from the WSW at 8 to 9 mph13 to 15 km/h. Sunday Night: Partly cloudy, with a low around 55°F13°C. Breezy from the SW at 6 to 7 mph10 to 11 km/h.
ClearHigh 77°F25°CLow 55°F13°CPrecip 0.01 in0.2 mm3%Cloud 25%Wind WSW 5 mph8 km/hMonday: Partly cloudy and warm, with a high of 77°F25°C and morning low of 57°F14°C. Breezy from the W at 5 to 7 mph8 to 12 km/h. Monday Night: Partly cloudy, with a low around 55°F13°C. Light wind from the SW around 5 mph8 km/h.

15-Day Forecast

Day High Low Precip Cloud Cover Condition Wind
TuesdaySep 2272°F22°C57°F14°C0 in0 mm· —42%Partly CloudySW 6 mph10 km/h
WednesdaySep 2385°F30°C56°F13°C0 in0 mm· —31%ClearWSW 3 mph5 km/h
ThursdaySep 2482°F28°C58°F14°C0 in0 mm· —54%Partly CloudySW 6 mph9 km/h
FridaySep 2577°F25°C59°F15°C0 in0 mm· —33%ClearWSW 7 mph11 km/h
SaturdaySep 2677°F25°C54°F12°C0 in0 mm· —34%ClearWSW 5 mph8 km/h
SundaySep 2775°F24°C55°F13°C0 in0.1 mm· 3%25%ClearWSW 7 mph11 km/h
MondaySep 2877°F25°C55°F13°C0.01 in0.2 mm· 3%25%ClearWSW 5 mph8 km/h
TuesdaySep 2980°F27°C55°F13°C0 in0 mm· —22%ClearWSW 5 mph7 km/h
WednesdaySep 3079°F26°C57°F14°C0 in0 mm· —31%ClearWSW 5 mph8 km/h
ThursdayOct 179°F26°C58°F14°C0.01 in0.3 mm· 3%34%ClearWSW 6 mph9 km/h
FridayOct 280°F26°C57°F14°C0.02 in0.6 mm· 4%21%ClearWSW 5 mph8 km/h
SaturdayOct 381°F27°C57°F14°C0 in0.1 mm· 2%21%ClearWSW 5 mph8 km/h
SundayOct 479°F26°C58°F14°C0.01 in0.2 mm· 3%30%ClearWSW 5 mph8 km/h
MondayOct 579°F26°C58°F14°C0.01 in0.3 mm· 3%28%ClearWSW 5 mph8 km/h
TuesdayOct 680°F27°C58°F15°C0 in0.1 mm· 4%24%ClearWSW 5 mph7 km/h

Nearby Cities

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

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Coordinates: 37.9063°N, 122.0650°W·Elevation: 52m·Timezone: America/Los_Angeles·Population: 68,910