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Weather in Walnut Creek, United States 🇺🇸

Current Weather in Walnut Creek

Heat Advisory issued September 8 at 7:33PM PDT until September 10 at 10:00PM PDT by NWS San Francisco CA
Overcast
28°C
Feels like 26°C. Overcast.
🌬️ 5 km/h E
💧 24% Humidity
🧭 1018 hPa
👁️ 10.0 km Visibility
☀️ UV Index: 1.5
🌡️ Dew Point: 6°C
🌅 Sunrise: 06:45 AM
🌇 Sunset: 07:26 PM
Map Overlays:

The current temperature in Walnut Creek is 28°C, overcast, feeling like 26°C. Relative humidity is 24%, with winds around 5 km/h, and the UV index is 2 (low). In the days ahead, expect temperatures in Walnut Creek from about 16°C to 37°C. ⚠️ Heat Advisory issued September 8 at 7:33PM PDT until September 10 at 10:00PM PDT by NWS San Francisco CA

Hourly Forecast for Walnut Creek

10:00
Overcast
31°
9%
11:00
Overcast
33°
9%
12:00
Overcast
34°
9%
13:00
Overcast
36°
9%
14:00
Overcast
35°
9%
15:00
Overcast
37°
9%
16:00
Overcast
36°
9%
17:00
Overcast
36°
9%
18:00
Overcast
35°
9%
19:00
Overcast
33°
9%
20:00
Overcast
31°
9%
21:00
Cloudy
30°
7%
22:00
Overcast
30°
8%
23:00
Overcast
29°
9%
00:00
Cloudy
28°
6%
01:00
Partly Cloudy
28°
3%
02:00
Clear
27°
1%
03:00
Cloudy
26°
7%
04:00
Cloudy
26°
6%
05:00
Cloudy
25°
8%
06:00
Overcast
24°
9%
07:00
Overcast
24°
9%
08:00
Patchy rain nearby
24°
8%
09:00
Patchy rain nearby
26°
17%

14-Day Forecast for Walnut Creek

Wed, Sep 09
Overcast Overcast
37° / 22°
Thu, Sep 10
Patchy rain nearby Patchy rain nearby
34° / 21°
Fri, Sep 11
Sunny Sunny
29° / 16°
Sat, Sep 12
Sunny Sunny
25° / 14°
Sun, Sep 13
Sunny Sunny
28° / 14°
Mon, Sep 14
Sunny Sunny
29° / 15°
Tue, Sep 15
Sunny Sunny
28° / 15°
Wed, Sep 16
Sunny Sunny
28° / 14°
Thu, Sep 17
Sunny Sunny
26° / 14°
Fri, Sep 18
Sunny Sunny
27° / 14°
Sat, Sep 19
Sunny Sunny
27° / 15°
Sun, Sep 20
Sunny Sunny
30° / 15°
Mon, Sep 21
Sunny Sunny
33° / 18°
Tue, Sep 22
Sunny Sunny
35° / 21°

Additional Forecasts for Walnut Creek

Air Quality

💨 US EPA Index 2 (Moderate)
CO (Carbon Monoxide) 188.0 μg/m³
O₃ (Ozone) 33.0 μg/m³
NO₂ (Nitrogen Dioxide) 26.9 μg/m³
SO₂ (Sulphur Dioxide) 1.9 μg/m³
PM2.5 (Fine particles) 20.5 μg/m³
PM10 (Coarse particles) 22.5 μg/m³

Historical Weather

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Best Time to Be Outside in Walnut Creek Today

The most comfortable window in Walnut Creek today looks like 10:00 to 13:00, when it is around 33°C. It should stay dry through that window. No significant rain is expected in the next several hours.

Frequently Asked Questions about Weather in Walnut Creek

What is the temperature in Walnut Creek right now?

The current temperature in Walnut Creek is 28°C (82°F), overcast (feels like 26°C).

What's the weather like in Walnut Creek right now?

Conditions in Walnut Creek right now: Overcast, humidity 24%, wind 5 km/h E.

What is today's forecast for Walnut Creek?

Today in Walnut Creek: high 37°C, low 22°C, overcast. Chance of rain: 9%.

What is the 7-day weather forecast for Walnut Creek?

Daily highs and lows for Walnut Creek:

  • 2026-09-09: 37°C / 22°C
  • 2026-09-10: 34°C / 21°C
  • 2026-09-11: 29°C / 16°C
  • 2026-09-12: 25°C / 14°C
  • 2026-09-13: 28°C / 14°C
  • 2026-09-14: 29°C / 15°C
  • 2026-09-15: 28°C / 15°C
Is it going to rain in Walnut Creek today?

There is a 9% chance of rain in Walnut Creek today.

What is the wind speed in Walnut Creek right now?

Wind in Walnut Creek is currently 5 km/h (3 mph) from the E.

What is the UV index in Walnut Creek right now?

The UV index in Walnut Creek is currently 1.5 (low). Sun protection is recommended when the index is 3 or higher.

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