Current Conditions

Walnut Creek, California

90°F32°C
Partly Cloudy

Wind

NE 3 mph4 km/h

Humidity

21%

Cloud Cover

34%

As of Tuesday, September 8, 2026 at 2:38 PM PDT

Today's Outlook

Day

Partly cloudy and hot, with a high of 92°F33°C and morning low of 81°F27°C. Light wind from the NNE around 3 mph5 km/h. Dry air.

Night

Mostly cloudy, with a low around 71°F22°C. Light wind from the WSW around 4 mph7 km/h.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
Partly CloudyHigh 92°F33°CLow 71°F22°CPrecip 0 in0 mmCloud 47%Wind NW 4 mph6 km/hTuesday: Partly cloudy and hot, with a high of 92°F33°C and morning low of 81°F27°C. Light wind from the NNE around 3 mph5 km/h. Dry air. Tuesday Night: Mostly cloudy, with a low around 71°F22°C. Light wind from the WSW around 4 mph7 km/h.
HotHigh 95°F35°CLow 67°F20°CPrecip 0 in0 mmCloud 71%Wind WNW 4 mph6 km/hWednesday: Mostly cloudy and hot, with a high of 95°F35°C and morning low of 70°F21°C. Light wind from the N around 4 mph6 km/h. Heat risk in the afternoon. Wednesday Night: Mostly cloudy, with a low around 67°F20°C. Light wind from the WSW around 3 mph6 km/h.
ClearHigh 94°F35°CLow 69°F21°CPrecip 0 in0 mmCloud 21%Wind WSW 6 mph10 km/hThursday: Mostly clear and hot, with a high of 94°F35°C and morning low of 72°F22°C. Breezy from the WSW at 7 to 10 mph11 to 16 km/h. Thursday Night: Mostly clear, with a low around 69°F21°C. Breezy from the SW at 6 to 8 mph9 to 12 km/h.
ClearHigh 80°F27°CLow 63°F17°CPrecip 0 in0 mmCloud 12%Wind SW 8 mph13 km/hFriday: Mostly clear and warm, with a high of 80°F27°C and morning low of 64°F18°C. Breezy from the WSW at 9 to 11 mph15 to 17 km/h. Friday Night: Mostly clear, with a low around 63°F17°C. Breezy from the SW at 7 to 8 mph12 to 13 km/h.
ClearHigh 77°F25°CLow 59°F15°CPrecip 0 in0 mmCloud 10%Wind WSW 9 mph15 km/hSaturday: Mostly clear and warm, with a high of 77°F25°C and morning low of 61°F16°C. Breezy from the WSW at 11 to 12 mph17 to 20 km/h. Saturday Night: Mostly clear, with a low around 59°F15°C. Breezy from the SW at 8 to 10 mph13 to 16 km/h.
ClearHigh 80°F27°CLow 57°F14°CPrecip 0 in0 mmCloud 9%Wind WSW 6 mph10 km/hSunday: Mostly clear and warm, with a high of 80°F27°C and morning low of 60°F16°C. Breezy from the W at 6 to 8 mph10 to 13 km/h. Dry air. Sunday Night: Mostly clear, with a low around 57°F14°C. Light wind from the WSW around 6 mph9 km/h.
ClearHigh 81°F27°CLow 57°F14°CPrecip 0 in0 mmCloud 16%Wind WSW 6 mph9 km/hMonday: Mostly clear and warm, with a high of 81°F27°C and morning low of 60°F15°C. Breezy from the WSW at 6 to 9 mph9 to 14 km/h. Monday Night: Mostly clear, with a low around 57°F14°C. Breezy from the SW at 5 to 7 mph9 to 11 km/h.

15-Day Forecast

Day High Low Precip Cloud Cover Condition Wind
TuesdaySep 892°F33°C71°F22°C0 in0 mm· —47%Partly CloudyNW 4 mph6 km/h
WednesdaySep 995°F35°C67°F20°C0 in0 mm· —71%HotWNW 4 mph6 km/h
ThursdaySep 1094°F35°C69°F21°C0 in0 mm· —21%ClearWSW 6 mph10 km/h
FridaySep 1180°F27°C63°F17°C0 in0 mm· —12%ClearSW 8 mph13 km/h
SaturdaySep 1277°F25°C59°F15°C0 in0 mm· —10%ClearWSW 9 mph15 km/h
SundaySep 1380°F27°C57°F14°C0 in0 mm· —9%ClearWSW 6 mph10 km/h
MondaySep 1481°F27°C57°F14°C0 in0 mm· —16%ClearWSW 6 mph9 km/h
TuesdaySep 1576°F25°C57°F14°C0 in0 mm· —34%ClearSW 7 mph11 km/h
WednesdaySep 1675°F24°C58°F14°C0 in0 mm· —35%ClearWSW 7 mph11 km/h
ThursdaySep 1777°F25°C57°F14°C0 in0.1 mm· 2%22%ClearWSW 6 mph10 km/h
FridaySep 1878°F26°C56°F14°C0 in0 mm· —26%ClearWSW 5 mph9 km/h
SaturdaySep 1979°F26°C57°F14°C0.01 in0.2 mm· 1%29%ClearWSW 6 mph9 km/h
SundaySep 2079°F26°C57°F14°C0 in0 mm· —30%ClearWSW 6 mph9 km/h
MondaySep 2180°F27°C58°F15°C0 in0.1 mm· 2%30%ClearWSW 6 mph9 km/h
TuesdaySep 2280°F27°C59°F15°C0 in0 mm· —35%ClearWSW 6 mph9 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