Monthly outlook for Mill Plain, WA: average high 63°, average low 46.9°. That is 1.2° above the climate normal for October. Precipitation is expected on 6 days (about 4.2 inches), against a normal of 7 days and 3.5 inches. The warmest day looks like 16 October (75.1°), the coolest 12 October (40.4°).
63°/46.9°
Average high / low
+1.2°
Above normal
6 / 7
Wet days / normal
4.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
10 October – 19 October
66.8°
61.9°
+2.7°
20 October – 29 October
56.8°
57.8°
-0.6°
30 October – 8 November
at normal
54°
—
October records over 66 years
88.9°1 October 1987All-time high
26.6°29 October 1971All-time low
Sun, 1162° / 41°0
62 °
Mill Plain, Sunday, 11 October
Clear. High 62°, low 41°.
Pressure29.94 inHg
Wind5.2 mph NW
Humidity55%
Visibility6.2 mi
Dew point42°
Mon, 1264° / 40°0
64 °
Mill Plain, Monday, 12 October
Clear. High 64°, low 40°.
Pressure30.06 inHg
Wind2.7 mph W
Humidity57%
Visibility2.9 mi
Dew point42°
Tue, 1365° / 44°0
65 °
Mill Plain, Tuesday, 13 October
Mostly clear. High 65°, low 44°.
Pressure30.12 inHg
Wind2.4 mph W
Humidity57%
Visibility6.2 mi
Dew point42°
Wed, 1467° / 48°0
67 °
Mill Plain, Wednesday, 14 October
Clear. High 67°, low 48°.
Pressure30.21 inHg
Wind3.8 mph NW
Humidity64%
Visibility—
Dew point44°
Thu, 1573° / 49°0
73 °
Mill Plain, Thursday, 15 October
Clear. High 73°, low 49°.
Pressure30.21 inHg
Wind4.3 mph W
Humidity71%
Visibility—
Dew point50°
Fri, 1675° / 48°0
75 °
Mill Plain, Friday, 16 October
Clear. High 75°, low 48°.
Pressure30.27 inHg
Wind7 mph NE
Humidity29%
Visibility—
Dew point32°
Sat, 1773° / 48°0
73 °
Mill Plain, Saturday, 17 October
Partly cloudy. High 73°, low 48°.
Pressure30.12 inHg
Wind3.9 mph NW
Humidity26%
Visibility—
Dew point26°
Sun, 1867° / 47°0
67 °
Mill Plain, Sunday, 18 October
Partly cloudy. High 67°, low 47°.
Pressure30.18 inHg
Wind2.9 mph W
Humidity44%
Visibility—
Dew point37°
Mon, 1965° / 51°0
65 °
Mill Plain, Monday, 19 October
Overcast. High 65°, low 51°.
Pressure30.09 inHg
Wind4.5 mph SW
Humidity55%
Visibility—
Dew point43°
Tue, 2055° / 50°0.43
55 °
Mill Plain, Tuesday, 20 October
Rain. High 55°, low 50°.
Pressure29.97 inHg
Wind7.8 mph S
Humidity78%
Visibility—
Dew point47°
Wed, 2156° / 49°0.49
56 °
Mill Plain, Wednesday, 21 October
Rain. High 56°, low 49°.
Pressure30.09 inHg
Wind9 mph SE
Humidity90%
Visibility—
Dew point49°
Thu, 2259° / 52°1.69
59 °
Mill Plain, Thursday, 22 October
Rain. High 59°, low 52°.
Pressure30.03 inHg
Wind15.3 mph S
Humidity98%
Visibility—
Dew point54°
Fri, 2360° / 48°0.25
60 °
Mill Plain, Friday, 23 October
Rain. High 60°, low 48°.
Pressure30.24 inHg
Wind6.5 mph NW
Humidity81%
Visibility—
Dew point51°
Sat, 2460° / 47°0.87
60 °
Mill Plain, Saturday, 24 October
Heavy rain. High 60°, low 47°.
Pressure30.09 inHg
Wind16.1 mph S
Humidity85%
Visibility—
Dew point48°
Sun, 2551° / 45°0.44
51 °
Mill Plain, Sunday, 25 October
Rain. High 51°, low 45°.
Pressure29.85 inHg
Wind8.7 mph SW
Humidity82%
Visibility—
Dew point45°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2656° / 43°0.37
56 °
Mill Plain, Monday, 26 October
Climate normal for this date — 60-year average.
Average high56°
Average low43°
Average precipitation0.37 in
Chance of precipitation58%
Record high72° (2003)
Record low30° (2020)
Tue, 2757° / 42°0.32
57 °
Mill Plain, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high57°
Average low42°
Average precipitation0.32 in
Chance of precipitation52%
Record high73° (1987)
Record low29° (1971)
Wed, 2856° / 42°0.34
56 °
Mill Plain, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high56°
Average low42°
Average precipitation0.34 in
Chance of precipitation60%
Record high72° (1987)
Record low29° (2019)
Thu, 2955° / 42°0.28
55 °
Mill Plain, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high55°
Average low42°
Average precipitation0.28 in
Chance of precipitation55%
Record high69° (1962)
Record low27° (1971)
Fri, 3055° / 42°0.3
55 °
Mill Plain, Friday, 30 October
Climate normal for this date — 60-year average.
Average high55°
Average low42°
Average precipitation0.3 in
Chance of precipitation53%
Record high66° (1965)
Record low27° (1991)
Sat, 3155° / 42°0.39
55 °
Mill Plain, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high55°
Average low42°
Average precipitation0.39 in
Chance of precipitation58%
Record high68° (1966)
Record low28° (2006)
Sun, 0154° / 42°0.35
54 °
Mill Plain, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high54°
Average low42°
Average precipitation0.35 in
Chance of precipitation55%
Record high67° (1966)
Record low28° (2003)
Mon, 0255° / 42°0.27
55 °
Mill Plain, Monday, 2 November
Climate normal for this date — 60-year average.
Average high55°
Average low42°
Average precipitation0.27 in
Chance of precipitation48%
Record high67° (1981)
Record low29° (1995)
Tue, 0355° / 42°0.29
55 °
Mill Plain, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high55°
Average low42°
Average precipitation0.29 in
Chance of precipitation57%
Record high66° (2010)
Record low29° (1995)
Wed, 0455° / 43°0.45
55 °
Mill Plain, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high55°
Average low43°
Average precipitation0.45 in
Chance of precipitation63%
Record high69° (1980)
Record low31° (1968)
Thu, 0554° / 42°0.35
54 °
Mill Plain, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high54°
Average low42°
Average precipitation0.35 in
Chance of precipitation73%
Record high66° (1987)
Record low26° (1971)
Fri, 0653° / 42°0.48
53 °
Mill Plain, Friday, 6 November
Climate normal for this date — 60-year average.
Average high53°
Average low42°
Average precipitation0.48 in
Chance of precipitation68%
Record high63° (1999)
Record low30° (1971)
Sat, 0753° / 42°0.42
53 °
Mill Plain, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high53°
Average low42°
Average precipitation0.42 in
Chance of precipitation63%
Record high65° (2016)
Record low32° (2001)
Sun, 0852° / 40°0.3
52 °
Mill Plain, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high52°
Average low40°
Average precipitation0.3 in
Chance of precipitation55%
Record high67° (1976)
Record low28° (2020)
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 Mill Plain, 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 Mill Plain, 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.