Weather in Black Diamond, WA
Black Diamond, Monday, 26 October, 14:50
Overcast. Feels like 54°. High 55°, low 46°.
Monthly outlook for Black Diamond, WA: average high 52.8°, average low 42.2°. That is 0.1° above the climate normal for October. Precipitation is expected on 12 days (about 4.8 inches), against a normal of 9 days and 3.9 inches. The warmest day looks like 5 November (63.4°), the coolest 30 October (32.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 26 October – 4 November | 51.8° | 53.3° | -0.9° |
| 5 November – 14 November | 54.5° | 50.9° | +2° |
| 15 November – 24 November | at normal | 47.3° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Kent (10 mi).
0.56
Black Diamond, Tuesday, 27 October
Rain. High 52°, low 48°.
0.39Black Diamond, Wednesday, 28 October
Rain. High 52°, low 40°.
0.69
Black Diamond, Thursday, 29 October
Snow. High 47°, low 36°.
0.18Black Diamond, Friday, 30 October
Light rain. High 45°, low 33°.
0.19Black Diamond, Saturday, 31 October
Light rain. High 45°, low 35°.
0.26Black Diamond, Sunday, 1 November
Light rain. High 46°, low 39°.
0Black Diamond, Monday, 2 November
Overcast. High 55°, low 41°.
0Black Diamond, Tuesday, 3 November
Overcast. High 59°, low 42°.
0Black Diamond, Wednesday, 4 November
Overcast. High 62°, low 43°.
0.03Black Diamond, Thursday, 5 November
Light rain. High 63°, low 48°.
0.37Black Diamond, Friday, 6 November
Rain. High 56°, low 47°.
0.18Black Diamond, Saturday, 7 November
Light rain. High 52°, low 45°.
0.72Black Diamond, Sunday, 8 November
Rain. High 48°, low 41°.
0.38Black Diamond, Monday, 9 November
Rain. High 57°, low 45°.
0.74Black Diamond, Tuesday, 10 November
Heavy rain. High 50°, low 45°.
0.24Black Diamond, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.28Black Diamond, Thursday, 12 November
Climate normal for this date — 60-year average.
0.29Black Diamond, Friday, 13 November
Climate normal for this date — 60-year average.
0.31Black Diamond, Saturday, 14 November
Climate normal for this date — 60-year average.
0.24Black Diamond, Sunday, 15 November
Climate normal for this date — 60-year average.
0.23Black Diamond, Monday, 16 November
Climate normal for this date — 60-year average.
0.26Black Diamond, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.19Black Diamond, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.31Black Diamond, Thursday, 19 November
Climate normal for this date — 60-year average.
0.24Black Diamond, Friday, 20 November
Climate normal for this date — 60-year average.
0.24Black Diamond, Saturday, 21 November
Climate normal for this date — 60-year average.
0.26Black Diamond, Sunday, 22 November
Climate normal for this date — 60-year average.
0.35Black Diamond, Monday, 23 November
Climate normal for this date — 60-year average.
0.33Black Diamond, Tuesday, 24 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 Black Diamond, WA 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 Black Diamond, WA 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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