Weather in Black Diamond, WA
Black Diamond, Wednesday, 28 October, 07:57
Overcast. Feels like 43°. High 52°, low 44°.
Monthly outlook for Black Diamond, WA: average high 54.5°, average low 42.2°. That is 1.4° above the climate normal for October. Precipitation is expected on 8 days (about 3.6 inches), against a normal of 9 days and 3.9 inches. The warmest day looks like 6 November (64.1°), the coolest 2 November (32.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 28 October – 6 November | 55.2° | 52.8° | +1.3° |
| 7 November – 16 November | 53.5° | 50.3° | +1.7° |
| 17 November – 26 November | at normal | 46.6° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Kent (10 mi).
0.28
Black Diamond, Thursday, 29 October
Rain. High 53°, low 43°.
0.04Black Diamond, Friday, 30 October
Light rain. High 52°, low 35°.
0.04Black Diamond, Saturday, 31 October
Light rain. High 53°, low 33°.
0
Black Diamond, Sunday, 1 November
Partly cloudy. High 52°, low 36°.
0Black Diamond, Monday, 2 November
Overcast. High 54°, low 32°.
0Black Diamond, Tuesday, 3 November
Overcast. High 58°, low 41°.
0Black Diamond, Wednesday, 4 November
Overcast. High 60°, low 42°.
0Black Diamond, Thursday, 5 November
Overcast. High 55°, low 48°.
0Black Diamond, Friday, 6 November
Overcast. High 64°, low 49°.
0.31Black Diamond, Saturday, 7 November
Rain. High 53°, low 47°.
0.2Black Diamond, Sunday, 8 November
Light rain. High 54°, low 46°.
0Black Diamond, Monday, 9 November
Overcast. High 60°, low 41°.
0.31Black Diamond, Tuesday, 10 November
Rain. High 51°, low 44°.
0.8Black Diamond, Wednesday, 11 November
Rain. High 49°, low 46°.
1Black Diamond, Thursday, 12 November
Heavy rain. High 55°, low 45°.
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.
0.35Black Diamond, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.22Black Diamond, Thursday, 26 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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