Weather in Walnut Creek, CA
Walnut Creek, Friday, 30 October, 05:38
Mostly clear. Feels like 54°. High 68°, low 48°.
Monthly outlook for Walnut Creek, CA: average high 64.5°, average low 50.3°. That is 1.4° below the climate normal for October. Precipitation is expected on 4 days (about 1.0 inches), against a normal of 3 days and 0.9 inches. The warmest day looks like 8 November (73.1°), the coolest 31 October (43.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 30 October – 8 November | 67.8° | 68.5° | -0.4° |
| 9 November – 18 November | 59.2° | 64.2° | -2.8° |
| 19 November – 28 November | at normal | 60.8° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Contra Costa Centre (2 mi).
0
Walnut Creek, Saturday, 31 October
Overcast. High 66°, low 44°.
0.04
Walnut Creek, Sunday, 1 November
Light rain. High 64°, low 49°.
0Walnut Creek, Monday, 2 November
Overcast. High 67°, low 46°.
0Walnut Creek, Tuesday, 3 November
Overcast. High 68°, low 49°.
0.01Walnut Creek, Wednesday, 4 November
Light rain. High 65°, low 52°.
0Walnut Creek, Thursday, 5 November
Overcast. High 66°, low 55°.
0
Walnut Creek, Friday, 6 November
Clear. High 70°, low 54°.
0Walnut Creek, Saturday, 7 November
Clear. High 71°, low 54°.
0Walnut Creek, Sunday, 8 November
Overcast. High 73°, low 57°.
0.52Walnut Creek, Monday, 9 November
Rain. High 63°, low 56°.
0.13Walnut Creek, Tuesday, 10 November
Light rain. High 58°, low 52°.
0.28Walnut Creek, Wednesday, 11 November
Rain. High 57°, low 50°.
0Walnut Creek, Thursday, 12 November
Overcast. High 58°, low 47°.
0Walnut Creek, Friday, 13 November
Clear. High 61°, low 47°.
0Walnut Creek, Saturday, 14 November
Clear. High 58°, low 45°.
0.06
Walnut Creek, Sunday, 15 November
Climate normal for this date — 60-year average.
0.07Walnut Creek, Monday, 16 November
Climate normal for this date — 60-year average.
0.11Walnut Creek, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.06
Walnut Creek, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.05Walnut Creek, Thursday, 19 November
Climate normal for this date — 60-year average.
0.09Walnut Creek, Friday, 20 November
Climate normal for this date — 60-year average.
0.1Walnut Creek, Saturday, 21 November
Climate normal for this date — 60-year average.
0.08Walnut Creek, Sunday, 22 November
Climate normal for this date — 60-year average.
0.04Walnut Creek, Monday, 23 November
Climate normal for this date — 60-year average.
0.07Walnut Creek, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.05Walnut Creek, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.05Walnut Creek, Thursday, 26 November
Climate normal for this date — 60-year average.
0.06Walnut Creek, Friday, 27 November
Climate normal for this date — 60-year average.
0.11Walnut Creek, Saturday, 28 November
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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