Weather in Black Diamond, WA
Black Diamond, Friday, 23 October, 08:12
Overcast. Feels like 43°. High 55°, low 38°.
Monthly outlook for Black Diamond, WA: average high 56.6°, average low 41.8°. That is 1.7° above the climate normal for October. Precipitation is expected on 7 days (about 7.2 inches), against a normal of 9 days and 3.8 inches. The warmest day looks like 30 October (62.1°), the coolest 24 October (32.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 23 October – 1 November | 57.1° | 54.2° | +1.6° |
| 2 November – 11 November | 55.7° | 51.7° | +2.2° |
| 12 November – 21 November | at normal | 48.7° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Kent (10 mi).
0Black Diamond, Saturday, 24 October
Overcast. High 54°, low 32°.
0.01
Black Diamond, Sunday, 25 October
Light rain. High 54°, low 38°.
0.13Black Diamond, Monday, 26 October
Light rain. High 57°, low 40°.
0.06Black Diamond, Tuesday, 27 October
Light rain. High 54°, low 42°.
0
Black Diamond, Wednesday, 28 October
Partly cloudy. High 53°, low 40°.
0
Black Diamond, Thursday, 29 October
Clear. High 61°, low 40°.
0Black Diamond, Friday, 30 October
Clear. High 62°, low 41°.
0Black Diamond, Saturday, 31 October
Clear. High 61°, low 40°.
0Black Diamond, Sunday, 1 November
Clear. High 60°, low 39°.
0Black Diamond, Monday, 2 November
Clear. High 58°, low 38°.
0.33Black Diamond, Tuesday, 3 November
Light rain. High 49°, low 44°.
0.45Black Diamond, Wednesday, 4 November
Rain. High 50°, low 41°.
3.47Black Diamond, Thursday, 5 November
Heavy rain. High 58°, low 47°.
1.53Black Diamond, Friday, 6 November
Heavy rain. High 59°, low 56°.
1.22Black Diamond, Saturday, 7 November
Rain. High 60°, low 52°.
0.19Black Diamond, Sunday, 8 November
Climate normal for this date — 60-year average.
0.24Black Diamond, Monday, 9 November
Climate normal for this date — 60-year average.
0.2Black Diamond, Tuesday, 10 November
Climate normal for this date — 60-year average.
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.
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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