Monthly outlook for Diablo, WA: average high 54.1°, average low 39.2°. That is 1.6° above the climate normal for October. Precipitation is expected on 4 days (about 0.6 inches), against a normal of 9 days and 5.1 inches. The warmest day looks like 5 November (68.5°), the coolest 23 October (34.2°).
54.1°/39.2°
Average high / low
+1.6°
Above normal
4 / 9
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
22 October – 31 October
50.7°
52.4°
-1°
1 November – 10 November
59.9°
48.4°
+6.4°
11 November – 20 November
at normal
44.9°
—
October records over 66 years
88°1 October 1987All-time high
3.2°28 October 1991All-time low
Fri, 2354° / 34°0
54 °
Diablo, Friday, 23 October
Light rain. High 54°, low 34°.
Pressure30.30 inHg
Wind2.6 mph N
Humidity60%
Visibility6.2 mi
Dew point26°
Sat, 2449° / 34°0.08
49 °
Diablo, Saturday, 24 October
Light rain. High 49°, low 34°.
Pressure30.18 inHg
Wind1.4 mph SW
Humidity71%
Visibility4.4 mi
Dew point34°
Sun, 2547° / 42°0.36
47 °
Diablo, Sunday, 25 October
Rain. High 47°, low 42°.
Pressure30.06 inHg
Wind1.8 mph NW
Humidity97%
Visibility3.3 mi
Dew point37°
Mon, 2652° / 41°0.1
52 °
Diablo, Monday, 26 October
Light rain. High 52°, low 41°.
Pressure30.06 inHg
Wind2.7 mph N
Humidity85%
Visibility6.2 mi
Dew point39°
Tue, 2756° / 41°0
56 °
Diablo, Tuesday, 27 October
Overcast. High 56°, low 41°.
Pressure30.21 inHg
Wind1.7 mph E
Humidity87%
Visibility—
Dew point44°
Wed, 2849° / 36°0
49 °
Diablo, Wednesday, 28 October
Partly cloudy. High 49°, low 36°.
Pressure30.30 inHg
Wind6.2 mph NE
Humidity69%
Visibility—
Dew point37°
Thu, 2951° / 36°0
51 °
Diablo, Thursday, 29 October
Overcast. High 51°, low 36°.
Pressure30.03 inHg
Wind6.2 mph NE
Humidity52%
Visibility—
Dew point27°
Fri, 3048° / 36°0
48 °
Diablo, Friday, 30 October
Overcast. High 48°, low 36°.
Pressure30.03 inHg
Wind4.1 mph SW
Humidity60%
Visibility—
Dew point30°
Sat, 3147° / 36°0
47 °
Diablo, Saturday, 31 October
Overcast. High 47°, low 36°.
Pressure30.12 inHg
Wind3.6 mph SW
Humidity68%
Visibility—
Dew point32°
Sun, 0150° / 35°0
50 °
Diablo, Sunday, 1 November
Mostly clear. High 50°, low 35°.
Pressure30.33 inHg
Wind2.7 mph E
Humidity62%
Visibility—
Dew point32°
Mon, 0256° / 37°0
56 °
Diablo, Monday, 2 November
Overcast. High 56°, low 37°.
Pressure30.50 inHg
Wind4 mph E
Humidity46%
Visibility—
Dew point29°
Tue, 0356° / 41°0
56 °
Diablo, Tuesday, 3 November
Overcast. High 56°, low 41°.
Pressure30.47 inHg
Wind4.4 mph E
Humidity48%
Visibility—
Dew point32°
Wed, 0467° / 45°0
67 °
Diablo, Wednesday, 4 November
Overcast. High 67°, low 45°.
Pressure30.33 inHg
Wind4.1 mph E
Humidity40%
Visibility—
Dew point33°
Thu, 0568° / 47°0
68 °
Diablo, Thursday, 5 November
Clear. High 68°, low 47°.
Pressure30.15 inHg
Wind3.8 mph E
Humidity37%
Visibility—
Dew point33°
Fri, 0661° / 46°0
61 °
Diablo, Friday, 6 November
Overcast. High 61°, low 46°.
Pressure30.21 inHg
Wind3.3 mph NE
Humidity49%
Visibility—
Dew point35°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 0747° / 36°0.41
47 °
Diablo, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high47°
Average low36°
Average precipitation0.41 in
Chance of precipitation68%
Record high64° (2024)
Record low19° (1993)
Sun, 0848° / 35°0.28
48 °
Diablo, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.28 in
Chance of precipitation58%
Record high66° (2019)
Record low6° (1966)
Mon, 0947° / 36°0.32
47 °
Diablo, Monday, 9 November
Climate normal for this date — 60-year average.
Average high47°
Average low36°
Average precipitation0.32 in
Chance of precipitation58%
Record high64° (2025)
Record low2° (1986)
Tue, 1047° / 35°0.3
47 °
Diablo, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high47°
Average low35°
Average precipitation0.3 in
Chance of precipitation53%
Record high62° (2016)
Record low-1° (1986)
Wed, 1147° / 34°0.36
47 °
Diablo, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.36 in
Chance of precipitation63%
Record high65° (2016)
Record low0° (1978)
Thu, 1246° / 35°0.42
46 °
Diablo, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high46°
Average low35°
Average precipitation0.42 in
Chance of precipitation68%
Record high59° (1976)
Record low4° (1978)
Fri, 1346° / 34°0.44
46 °
Diablo, Friday, 13 November
Climate normal for this date — 60-year average.
Average high46°
Average low34°
Average precipitation0.44 in
Chance of precipitation65%
Record high61° (2018)
Record low5° (1980)
Sat, 1446° / 34°0.39
46 °
Diablo, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high46°
Average low34°
Average precipitation0.39 in
Chance of precipitation58%
Record high59° (1999)
Record low4° (1964)
Sun, 1545° / 33°0.44
45 °
Diablo, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high45°
Average low33°
Average precipitation0.44 in
Chance of precipitation68%
Record high58° (1999)
Record low12° (1991)
Mon, 1644° / 35°0.36
44 °
Diablo, Monday, 16 November
Climate normal for this date — 60-year average.
Average high44°
Average low35°
Average precipitation0.36 in
Chance of precipitation75%
Record high60° (2008)
Record low10° (2000)
Tue, 1744° / 33°0.4
44 °
Diablo, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high44°
Average low33°
Average precipitation0.4 in
Chance of precipitation68%
Record high61° (2008)
Record low2° (2000)
Wed, 1844° / 33°0.31
44 °
Diablo, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high44°
Average low33°
Average precipitation0.31 in
Chance of precipitation65%
Record high60° (2018)
Record low15° (1985)
Thu, 1943° / 33°0.38
43 °
Diablo, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high43°
Average low33°
Average precipitation0.38 in
Chance of precipitation70%
Record high61° (2005)
Record low10° (1977)
Fri, 2043° / 32°0.38
43 °
Diablo, Friday, 20 November
Climate normal for this date — 60-year average.
Average high43°
Average low32°
Average precipitation0.38 in
Chance of precipitation60%
Record high60° (2005)
Record low5° (1977)
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 Diablo, 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 Diablo, 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.