Monthly outlook for South Union, WA: average high 53.9°, average low 43.1°. That is 0.2° above the climate normal for October. Precipitation is expected on 7 days (about 3.6 inches), against a normal of 9 days and 3.9 inches. The warmest day looks like 6 November (61.4°), the coolest 31 October (35.2°).
53.9°/43.1°
Average high / low
+0.2°
Above normal
7 / 9
Wet days / normal
3.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
28 October – 6 November
54°
54.2°
-0.1°
7 November – 16 November
53.6°
51.7°
+1.1°
17 November – 26 November
at normal
47.9°
—
October records over 66 years
87.4°1 October 1987All-time high
29.5°28 October 2023All-time low
Climate normals and records are computed from the nearest reference point — Olympia (7 mi).
Thu, 2953° / 45°0.32
53 °
South Union, Thursday, 29 October
Rain. High 53°, low 45°.
Pressure29.97 inHg
Wind8.1 mph S
Humidity64%
Visibility6.2 mi
Dew point40°
Fri, 3052° / 39°0
52 °
South Union, Friday, 30 October
Overcast. High 52°, low 39°.
Pressure29.97 inHg
Wind1.7 mph SE
Humidity84%
Visibility6.2 mi
Dew point42°
Sat, 3152° / 35°0
52 °
South Union, Saturday, 31 October
Partly cloudy. High 52°, low 35°.
Pressure30.03 inHg
Wind2.3 mph NE
Humidity81%
Visibility6.2 mi
Dew point42°
Sun, 0153° / 37°0
53 °
South Union, Sunday, 1 November
Clear. High 53°, low 37°.
Pressure30.24 inHg
Wind2.3 mph SE
Humidity82%
Visibility—
Dew point40°
Mon, 0251° / 38°0
51 °
South Union, Monday, 2 November
Overcast. High 51°, low 38°.
Pressure30.36 inHg
Wind4.7 mph NE
Humidity87%
Visibility—
Dew point40°
Tue, 0354° / 40°0
54 °
South Union, Tuesday, 3 November
Overcast. High 54°, low 40°.
Pressure30.18 inHg
Wind4.2 mph NE
Humidity59%
Visibility—
Dew point34°
Wed, 0456° / 40°0
56 °
South Union, Wednesday, 4 November
Overcast. High 56°, low 40°.
Pressure29.94 inHg
Wind4.5 mph NE
Humidity64%
Visibility—
Dew point36°
Thu, 0555° / 47°0.01
55 °
South Union, Thursday, 5 November
Light rain. High 55°, low 47°.
Pressure29.97 inHg
Wind3 mph S
Humidity73%
Visibility—
Dew point41°
Fri, 0661° / 49°0.01
61 °
South Union, Friday, 6 November
Light rain. High 61°, low 49°.
Pressure29.85 inHg
Wind3.9 mph NE
Humidity61%
Visibility—
Dew point42°
Sat, 0751° / 48°0.36
51 °
South Union, Saturday, 7 November
Rain. High 51°, low 48°.
Pressure29.53 inHg
Wind7.2 mph NE
Humidity88%
Visibility—
Dew point46°
Sun, 0857° / 44°0.11
57 °
South Union, Sunday, 8 November
Light rain. High 57°, low 44°.
Pressure30.06 inHg
Wind4.5 mph SW
Humidity83%
Visibility—
Dew point47°
Mon, 0955° / 41°0
55 °
South Union, Monday, 9 November
Overcast. High 55°, low 41°.
Pressure30.09 inHg
Wind4.3 mph NE
Humidity82%
Visibility—
Dew point42°
Tue, 1050° / 45°0.43
50 °
South Union, Tuesday, 10 November
Rain. High 50°, low 45°.
Pressure29.85 inHg
Wind5.5 mph S
Humidity91%
Visibility—
Dew point43°
Wed, 1155° / 47°1.13
55 °
South Union, Wednesday, 11 November
Rain. High 55°, low 47°.
Pressure29.62 inHg
Wind8.5 mph SE
Humidity95%
Visibility—
Dew point49°
Thu, 1254° / 50°0.8
54 °
South Union, Thursday, 12 November
Rain. High 54°, low 50°.
Pressure29.50 inHg
Wind12.3 mph S
Humidity90%
Visibility—
Dew point48°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 1352° / 42°0.33
52 °
South Union, Friday, 13 November
Climate normal for this date — 60-year average.
Average high52°
Average low42°
Average precipitation0.33 in
Chance of precipitation65%
Record high60° (1969)
Record low29° (1985)
Sat, 1451° / 42°0.3
51 °
South Union, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high51°
Average low42°
Average precipitation0.3 in
Chance of precipitation52%
Record high64° (1995)
Record low29° (1964)
Sun, 1551° / 41°0.27
51 °
South Union, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.27 in
Chance of precipitation62%
Record high61° (2001)
Record low28° (1978)
Mon, 1649° / 41°0.25
49 °
South Union, Monday, 16 November
Climate normal for this date — 60-year average.
Average high49°
Average low41°
Average precipitation0.25 in
Chance of precipitation65%
Record high61° (1965)
Record low31° (2014)
Tue, 1750° / 41°0.28
50 °
South Union, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high50°
Average low41°
Average precipitation0.28 in
Chance of precipitation67%
Record high63° (1995)
Record low27° (1961)
Wed, 1849° / 40°0.19
49 °
South Union, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high49°
Average low40°
Average precipitation0.19 in
Chance of precipitation53%
Record high57° (1968)
Record low26° (1985)
Thu, 1949° / 40°0.37
49 °
South Union, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high49°
Average low40°
Average precipitation0.37 in
Chance of precipitation67%
Record high62° (1968)
Record low27° (2022)
Fri, 2049° / 40°0.26
49 °
South Union, Friday, 20 November
Climate normal for this date — 60-year average.
Average high49°
Average low40°
Average precipitation0.26 in
Chance of precipitation57%
Record high60° (2002)
Record low27° (1977)
Sat, 2148° / 38°0.29
48 °
South Union, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high48°
Average low38°
Average precipitation0.29 in
Chance of precipitation55%
Record high59° (2002)
Record low23° (1978)
Sun, 2247° / 38°0.27
47 °
South Union, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high47°
Average low38°
Average precipitation0.27 in
Chance of precipitation60%
Record high63° (2017)
Record low19° (1985)
Mon, 2347° / 38°0.35
47 °
South Union, Monday, 23 November
Climate normal for this date — 60-year average.
Average high47°
Average low38°
Average precipitation0.35 in
Chance of precipitation72%
Record high60° (2017)
Record low13° (1985)
Tue, 2447° / 39°0.36
47 °
South Union, Tuesday, 24 November
Climate normal for this date — 60-year average.
Average high47°
Average low39°
Average precipitation0.36 in
Chance of precipitation62%
Record high56° (1995)
Record low16° (2010)
Wed, 2547° / 38°0.34
47 °
South Union, Wednesday, 25 November
Climate normal for this date — 60-year average.
Average high47°
Average low38°
Average precipitation0.34 in
Chance of precipitation65%
Record high57° (1977)
Record low14° (1985)
Thu, 2647° / 38°0.22
47 °
South Union, Thursday, 26 November
Climate normal for this date — 60-year average.
Average high47°
Average low38°
Average precipitation0.22 in
Chance of precipitation47%
Record high59° (2014)
Record low25° (1985)
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.