Monthly outlook for Plain, WA: average high 59.1°, average low 40°. That is 0.7° above the climate normal for October. Precipitation is expected on 4 days (about 0.5 inches), against a normal of 6 days and 1.8 inches. The warmest day looks like 8 October (75°), the coolest 15 October (32.1°).
59.1°/40°
Average high / low
+0.7°
Above normal
4 / 6
Wet days / normal
0.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
7 October – 16 October
55.4°
59.3°
-2.2°
17 October – 26 October
65.4°
54.2°
+6.2°
27 October – 5 November
at normal
47.8°
—
October records over 66 years
81.9°2 October 2022All-time high
3.4°30 October 1991All-time low
Climate normals and records are computed from the nearest reference point — Chumstick (5 mi).
Thu, 0875° / 50°0
75 °
Plain, Thursday, 8 October
Overcast. High 75°, low 50°.
Pressure29.97 inHg
Wind4.4 mph W
Humidity38%
Visibility6.2 mi
Dew point44°
Fri, 0951° / 41°0.13
51 °
Plain, Friday, 9 October
Rain. High 51°, low 41°.
Pressure29.68 inHg
Wind8.4 mph NW
Humidity92%
Visibility6.1 mi
Dew point45°
Sat, 1046° / 39°0.2
46 °
Plain, Saturday, 10 October
Light rain. High 46°, low 39°.
Pressure29.83 inHg
Wind1.8 mph SW
Humidity74%
Visibility6.2 mi
Dew point38°
Sun, 1151° / 36°0.07
51 °
Plain, Sunday, 11 October
Light rain. High 51°, low 36°.
Pressure30.15 inHg
Wind4.3 mph SE
Humidity66%
Visibility—
Dew point32°
Mon, 1256° / 33°0
56 °
Plain, Monday, 12 October
Clear. High 56°, low 33°.
Pressure30.12 inHg
Wind4.6 mph NW
Humidity51%
Visibility—
Dew point29°
Tue, 1346° / 39°0.15
46 °
Plain, Tuesday, 13 October
Snow. High 46°, low 39°.
Pressure29.85 inHg
Wind11.4 mph W
Humidity77%
Visibility—
Dew point38°
Wed, 1449° / 33°0
49 °
Plain, Wednesday, 14 October
Partly cloudy. High 49°, low 33°.
Pressure30.12 inHg
Wind10.2 mph NW
Humidity70%
Visibility—
Dew point35°
Thu, 1554° / 32°0
54 °
Plain, Thursday, 15 October
Clear. High 54°, low 32°.
Pressure30.39 inHg
Wind5.7 mph NW
Humidity28%
Visibility—
Dew point16°
Fri, 1654° / 36°0
54 °
Plain, Friday, 16 October
Overcast. High 54°, low 36°.
Pressure30.36 inHg
Wind3.5 mph NW
Humidity36%
Visibility—
Dew point22°
Sat, 1761° / 36°0
61 °
Plain, Saturday, 17 October
Clear. High 61°, low 36°.
Pressure30.30 inHg
Wind4.5 mph SE
Humidity27%
Visibility—
Dew point19°
Sun, 1864° / 40°0
64 °
Plain, Sunday, 18 October
Clear. High 64°, low 40°.
Pressure30.15 inHg
Wind4.5 mph SE
Humidity27%
Visibility—
Dew point21°
Mon, 1966° / 42°0
66 °
Plain, Monday, 19 October
Clear. High 66°, low 42°.
Pressure30.15 inHg
Wind4.7 mph SE
Humidity27%
Visibility—
Dew point24°
Tue, 2069° / 44°0
69 °
Plain, Tuesday, 20 October
Overcast. High 69°, low 44°.
Pressure30.24 inHg
Wind4.2 mph SE
Humidity24%
Visibility—
Dew point23°
Wed, 2167° / 45°0
67 °
Plain, Wednesday, 21 October
Mostly clear. High 67°, low 45°.
Pressure30.21 inHg
Wind5 mph SE
Humidity29%
Visibility—
Dew point27°
Thu, 2265° / 43°0
65 °
Plain, Thursday, 22 October
Clear. High 65°, low 43°.
Pressure30.06 inHg
Wind5.4 mph SE
Humidity34%
Visibility—
Dew point29°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 2354° / 39°0.13
54 °
Plain, Friday, 23 October
Climate normal for this date — 60-year average.
Average high54°
Average low39°
Average precipitation0.13 in
Chance of precipitation37%
Record high66° (2018)
Record low27° (1984)
Sat, 2452° / 38°0.13
52 °
Plain, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.13 in
Chance of precipitation45%
Record high69° (1965)
Record low24° (2020)
Sun, 2551° / 37°0.17
51 °
Plain, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.17 in
Chance of precipitation45%
Record high65° (1965)
Record low12° (2020)
Mon, 2651° / 37°0.19
51 °
Plain, Monday, 26 October
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.19 in
Chance of precipitation47%
Record high66° (2003)
Record low18° (1970)
Tue, 2750° / 37°0.14
50 °
Plain, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.14 in
Chance of precipitation33%
Record high63° (1993)
Record low8° (1970)
Wed, 2849° / 36°0.16
49 °
Plain, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.16 in
Chance of precipitation52%
Record high67° (1987)
Record low14° (1971)
Thu, 2949° / 35°0.13
49 °
Plain, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.13 in
Chance of precipitation50%
Record high66° (1987)
Record low9° (1971)
Fri, 3048° / 35°0.18
48 °
Plain, Friday, 30 October
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.18 in
Chance of precipitation52%
Record high65° (1962)
Record low3° (1991)
Sat, 3148° / 35°0.24
48 °
Plain, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.24 in
Chance of precipitation57%
Record high63° (1988)
Record low19° (1984)
Sun, 0147° / 35°0.22
47 °
Plain, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high47°
Average low35°
Average precipitation0.22 in
Chance of precipitation47%
Record high61° (1965)
Record low18° (1984)
Mon, 0247° / 34°0.17
47 °
Plain, Monday, 2 November
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.17 in
Chance of precipitation42%
Record high57° (2010)
Record low18° (1991)
Tue, 0347° / 34°0.16
47 °
Plain, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.16 in
Chance of precipitation50%
Record high58° (2019)
Record low18° (1973)
Wed, 0447° / 35°0.28
47 °
Plain, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high47°
Average low35°
Average precipitation0.28 in
Chance of precipitation60%
Record high61° (2020)
Record low22° (1973)
Thu, 0546° / 35°0.16
46 °
Plain, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high46°
Average low35°
Average precipitation0.16 in
Chance of precipitation50%
Record high59° (2019)
Record low6° (1971)
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 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 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.