Weather in Umtanum, WA
Umtanum, Sunday, 18 October, 16:20
Overcast. Feels like 59°. High 62°, low 34°.
Monthly outlook for Umtanum, WA: average high 55.6°, average low 37.4°. That is 0.3° below the climate normal for October. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 4 days and 0.9 inches. The warmest day looks like 21 October (69.1°), the coolest 30 October (30.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 18 October – 27 October | 58.4° | 58.4° | -0° |
| 28 October – 6 November | 51° | 51.7° | -0.4° |
| 7 November – 16 November | at normal | 47.6° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Hillside Siding (9 mi).
0Umtanum, Monday, 19 October
Overcast. High 62°, low 42°.
0
Umtanum, Tuesday, 20 October
Mostly clear. High 67°, low 45°.
0Umtanum, Wednesday, 21 October
Mostly clear. High 69°, low 48°.
0
Umtanum, Thursday, 22 October
Clear. High 61°, low 45°.
0Umtanum, Friday, 23 October
Clear. High 54°, low 41°.
0.03
Umtanum, Saturday, 24 October
Light rain. High 51°, low 37°.
0Umtanum, Sunday, 25 October
Mostly clear. High 54°, low 39°.
0
Umtanum, Monday, 26 October
Partly cloudy. High 51°, low 37°.
0Umtanum, Tuesday, 27 October
Mostly clear. High 52°, low 35°.
0Umtanum, Wednesday, 28 October
Overcast. High 51°, low 36°.
0Umtanum, Thursday, 29 October
Clear. High 49°, low 32°.
0Umtanum, Friday, 30 October
Clear. High 50°, low 31°.
0Umtanum, Saturday, 31 October
Partly cloudy. High 52°, low 32°.
0Umtanum, Sunday, 1 November
Clear. High 53°, low 32°.
0Umtanum, Monday, 2 November
Overcast. High 52°, low 33°.
0.03Umtanum, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.13
Umtanum, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.07Umtanum, Thursday, 5 November
Climate normal for this date — 60-year average.
0.07Umtanum, Friday, 6 November
Climate normal for this date — 60-year average.
0.07Umtanum, Saturday, 7 November
Climate normal for this date — 60-year average.
0.05Umtanum, Sunday, 8 November
Climate normal for this date — 60-year average.
0.06Umtanum, Monday, 9 November
Climate normal for this date — 60-year average.
0.06Umtanum, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.06Umtanum, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.08Umtanum, Thursday, 12 November
Climate normal for this date — 60-year average.
0.09Umtanum, Friday, 13 November
Climate normal for this date — 60-year average.
0.06Umtanum, Saturday, 14 November
Climate normal for this date — 60-year average.
0.06Umtanum, Sunday, 15 November
Climate normal for this date — 60-year average.
0.06Umtanum, Monday, 16 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 Umtanum, 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 Umtanum, 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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