Weather in McChord AFB, WA
McChord AFB, Sunday, 9 August, 00:23
Clear. Feels like 61°. High 78°, low 52°.
Monthly outlook for McChord AFB, WA: average high 76.7°, average low 55.1°. That is 0.4° above the climate normal for August. Precipitation is expected on 5 days (about 1.3 inches), against a normal of 2 days and 0.6 inches. The warmest day looks like 13 August (87.7°), the coolest 11 August (50.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 80.8° | 77° | +2.1° |
| 19 August – 28 August | 69.9° | 74.5° | -2.5° |
| 29 August – 7 September | at normal | 72.5° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Tacoma (8 mi).
0
McChord AFB, Monday, 10 August
Partly cloudy. High 81°, low 52°.
0
McChord AFB, Tuesday, 11 August
Clear. High 85°, low 51°.
0McChord AFB, Wednesday, 12 August
Clear. High 84°, low 55°.
0McChord AFB, Thursday, 13 August
Clear. High 88°, low 53°.
0
McChord AFB, Friday, 14 August
Overcast. High 85°, low 55°.
0McChord AFB, Saturday, 15 August
Overcast. High 85°, low 54°.
0McChord AFB, Sunday, 16 August
Overcast. High 82°, low 54°.
0.29
McChord AFB, Monday, 17 August
Light rain. High 61°, low 57°.
0McChord AFB, Tuesday, 18 August
Overcast. High 78°, low 55°.
0McChord AFB, Wednesday, 19 August
Overcast. High 77°, low 57°.
0.1McChord AFB, Thursday, 20 August
Light rain. High 79°, low 60°.
0.09McChord AFB, Friday, 21 August
Light rain. High 70°, low 57°.
0.21McChord AFB, Saturday, 22 August
Light rain. High 66°, low 59°.
0McChord AFB, Sunday, 23 August
Overcast. High 69°, low 56°.
0.66McChord AFB, Monday, 24 August
Rain. High 59°, low 54°.
0.05
McChord AFB, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.03McChord AFB, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.06McChord AFB, Thursday, 27 August
Climate normal for this date — 60-year average.
0.04McChord AFB, Friday, 28 August
Climate normal for this date — 60-year average.
0.09McChord AFB, Saturday, 29 August
Climate normal for this date — 60-year average.
0.07McChord AFB, Sunday, 30 August
Climate normal for this date — 60-year average.
0.05McChord AFB, Monday, 31 August
Climate normal for this date — 60-year average.
0.07McChord AFB, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.06McChord AFB, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.05McChord AFB, Thursday, 3 September
Climate normal for this date — 60-year average.
0.02McChord AFB, Friday, 4 September
Climate normal for this date — 60-year average.
0.05McChord AFB, Saturday, 5 September
Climate normal for this date — 60-year average.
0.07McChord AFB, Sunday, 6 September
Climate normal for this date — 60-year average.
0.04McChord AFB, Monday, 7 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 McChord AFB, 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 McChord AFB, 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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