Weather in South Union, WA
South Union, Sunday, 9 August, 00:26
Clear. Feels like 56°. High 78°, low 52°.
Monthly outlook for South Union, WA: average high 75.9°, average low 53.9°. That is 1° below the climate normal for August. Precipitation is expected on 5 days (about 1.0 inches), against a normal of 2 days and 0.6 inches. The warmest day looks like 13 August (86.5°), the coolest 11 August (49.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 78.9° | 78.7° | +0.1° |
| 19 August – 28 August | 70.8° | 76.2° | -3° |
| 29 August – 7 September | at normal | 74.2° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Olympia (7 mi).
0
South Union, Monday, 10 August
Partly cloudy. High 79°, low 52°.
0
South Union, Tuesday, 11 August
Clear. High 83°, low 50°.
0South Union, Wednesday, 12 August
Clear. High 81°, low 53°.
0South Union, Thursday, 13 August
Clear. High 86°, low 52°.
0
South Union, Friday, 14 August
Overcast. High 84°, low 53°.
0South Union, Saturday, 15 August
Overcast. High 82°, low 53°.
0South Union, Sunday, 16 August
Overcast. High 81°, low 52°.
0.18
South Union, Monday, 17 August
Light rain. High 59°, low 56°.
0South Union, Tuesday, 18 August
Overcast. High 76°, low 55°.
0South Union, Wednesday, 19 August
Overcast. High 76°, low 58°.
0.11South Union, Thursday, 20 August
Light rain. High 75°, low 57°.
0.06South Union, Friday, 21 August
Light rain. High 69°, low 55°.
0.06South Union, Saturday, 22 August
Light rain. High 71°, low 58°.
0South Union, Sunday, 23 August
Overcast. High 72°, low 54°.
0.62South Union, Monday, 24 August
Rain. High 63°, low 54°.
0.05
South Union, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.03South Union, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.07South Union, Thursday, 27 August
Climate normal for this date — 60-year average.
0.06South Union, Friday, 28 August
Climate normal for this date — 60-year average.
0.08South Union, Saturday, 29 August
Climate normal for this date — 60-year average.
0.07South Union, Sunday, 30 August
Climate normal for this date — 60-year average.
0.04South Union, Monday, 31 August
Climate normal for this date — 60-year average.
0.1South Union, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.05South Union, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.05South Union, Thursday, 3 September
Climate normal for this date — 60-year average.
0.04South Union, Friday, 4 September
Climate normal for this date — 60-year average.
0.06South Union, Saturday, 5 September
Climate normal for this date — 60-year average.
0.07South Union, Sunday, 6 September
Climate normal for this date — 60-year average.
0.04South Union, 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 South Union, 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 South Union, 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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