Weather in Black Diamond, WA
Black Diamond, Saturday, 8 August, 22:25
Mostly clear. Feels like 66°. High 83°, low 57°.
Monthly outlook for Black Diamond, WA: average high 82.7°, average low 54.5°. That is 3.9° above the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 15 August (91.7°), the coolest 23 August (51.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 August – 17 August | 84.3° | 76.6° | +4.3° |
| 18 August – 27 August | 80.1° | 74.1° | +3.4° |
| 28 August – 6 September | at normal | 72.3° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Kent (10 mi).
0
Black Diamond, Sunday, 9 August
Partly cloudy. High 76°, low 52°.
0
Black Diamond, Monday, 10 August
Overcast. High 80°, low 52°.
0
Black Diamond, Tuesday, 11 August
Clear. High 83°, low 52°.
0Black Diamond, Wednesday, 12 August
Clear. High 78°, low 54°.
0Black Diamond, Thursday, 13 August
Clear. High 82°, low 52°.
0Black Diamond, Friday, 14 August
Clear. High 88°, low 55°.
0
Black Diamond, Saturday, 15 August
Mostly clear. High 92°, low 59°.
0Black Diamond, Sunday, 16 August
Clear. High 91°, low 60°.
0Black Diamond, Monday, 17 August
Clear. High 89°, low 57°.
0Black Diamond, Tuesday, 18 August
Overcast. High 83°, low 56°.
0Black Diamond, Wednesday, 19 August
Overcast. High 79°, low 54°.
0Black Diamond, Thursday, 20 August
Mostly clear. High 79°, low 54°.
0Black Diamond, Friday, 21 August
Clear. High 82°, low 53°.
0Black Diamond, Saturday, 22 August
Overcast. High 83°, low 54°.
0Black Diamond, Sunday, 23 August
Overcast. High 75°, low 52°.
0.07Black Diamond, Monday, 24 August
Climate normal for this date — 60-year average.
0.07Black Diamond, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.05Black Diamond, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.08Black Diamond, Thursday, 27 August
Climate normal for this date — 60-year average.
0.04Black Diamond, Friday, 28 August
Climate normal for this date — 60-year average.
0.11Black Diamond, Saturday, 29 August
Climate normal for this date — 60-year average.
0.08
Black Diamond, Sunday, 30 August
Climate normal for this date — 60-year average.
0.07Black Diamond, Monday, 31 August
Climate normal for this date — 60-year average.
0.08Black Diamond, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.08Black Diamond, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.08Black Diamond, Thursday, 3 September
Climate normal for this date — 60-year average.
0.06Black Diamond, Friday, 4 September
Climate normal for this date — 60-year average.
0.08Black Diamond, Saturday, 5 September
Climate normal for this date — 60-year average.
0.1Black Diamond, 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 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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