Weather in Walnut Creek, CA
Walnut Creek, Saturday, 8 August, 23:01
Clear. Feels like 65°. High 89°, low 61°.
Monthly outlook for Walnut Creek, CA: average high 83.2°, average low 60.2°. That is 0.1° above the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 0 days and 0.1 inches. The warmest day looks like 9 August (92.9°), the coolest 20 August (57.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 August – 17 August | 84.9° | 83.8° | +0.6° |
| 18 August – 27 August | 80.5° | 82.6° | -1.2° |
| 28 August – 6 September | at normal | 84.6° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Concord (5 mi).
0
Walnut Creek, Sunday, 9 August
Clear. High 93°, low 62°.
0
Walnut Creek, Monday, 10 August
Overcast. High 89°, low 62°.
0Walnut Creek, Tuesday, 11 August
Clear. High 89°, low 61°.
0Walnut Creek, Wednesday, 12 August
Overcast. High 85°, low 62°.
0Walnut Creek, Thursday, 13 August
Overcast. High 82°, low 61°.
0Walnut Creek, Friday, 14 August
Clear. High 80°, low 60°.
0Walnut Creek, Saturday, 15 August
Clear. High 82°, low 60°.
0Walnut Creek, Sunday, 16 August
Overcast. High 81°, low 60°.
0Walnut Creek, Monday, 17 August
Overcast. High 78°, low 61°.
0
Walnut Creek, Tuesday, 18 August
Partly cloudy. High 81°, low 61°.
0Walnut Creek, Wednesday, 19 August
Clear. High 82°, low 58°.
0Walnut Creek, Thursday, 20 August
Overcast. High 78°, low 58°.
0Walnut Creek, Friday, 21 August
Partly cloudy. High 84°, low 58°.
0Walnut Creek, Saturday, 22 August
Overcast. High 77°, low 59°.
0
Walnut Creek, Sunday, 23 August
Mostly clear. High 81°, low 59°.
0Walnut Creek, Monday, 24 August
Climate normal for this date — 60-year average.
0Walnut Creek, Tuesday, 25 August
Climate normal for this date — 60-year average.
0Walnut Creek, Wednesday, 26 August
Climate normal for this date — 60-year average.
0Walnut Creek, Thursday, 27 August
Climate normal for this date — 60-year average.
0Walnut Creek, Friday, 28 August
Climate normal for this date — 60-year average.
0Walnut Creek, Saturday, 29 August
Climate normal for this date — 60-year average.
0Walnut Creek, Sunday, 30 August
Climate normal for this date — 60-year average.
0Walnut Creek, Monday, 31 August
Climate normal for this date — 60-year average.
0Walnut Creek, Tuesday, 1 September
Climate normal for this date — 60-year average.
0Walnut Creek, Wednesday, 2 September
Climate normal for this date — 60-year average.
0Walnut Creek, Thursday, 3 September
Climate normal for this date — 60-year average.
0Walnut Creek, Friday, 4 September
Climate normal for this date — 60-year average.
0Walnut Creek, Saturday, 5 September
Climate normal for this date — 60-year average.
0Walnut Creek, Sunday, 6 September
Climate normal for this date — 60-year average.
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Walnut Creek, CA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Walnut Creek, CA since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.
Sun and moon today
Weather history
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