Monthly outlook for Alto, WA: average high 56.2°, average low 40.9°. That is 0.4° below the climate normal for October. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 6 days and 1.3 inches. The warmest day looks like 21 October (64.1°), the coolest 24 October (36.2°).
56.2°/40.9°
Average high / low
−0.4°
Below normal
1 / 6
Wet days / normal
0.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
20 October – 29 October
58°
58.6°
-0.3°
30 October – 8 November
53.1°
53.5°
-0.2°
9 November – 18 November
at normal
49.8°
—
October records over 66 years
89.6°2 October 1975All-time high
20.3°30 October 2019All-time low
Climate normals and records are computed from the nearest reference point — Dayton (8 mi).
Wed, 2164° / 39°0
64 °
Alto, Wednesday, 21 October
Overcast. High 64°, low 39°.
Pressure30.00 inHg
Wind4.1 mph N
Humidity41%
Visibility6.2 mi
Dew point37°
Thu, 2260° / 42°0
60 °
Alto, Thursday, 22 October
Light rain. High 60°, low 42°.
Pressure29.88 inHg
Wind7 mph SW
Humidity42%
Visibility6.2 mi
Dew point37°
Fri, 2355° / 41°0
55 °
Alto, Friday, 23 October
Clear. High 55°, low 41°.
Pressure30.21 inHg
Wind12.2 mph SW
Humidity44%
Visibility6.2 mi
Dew point30°
Sat, 2458° / 36°0
58 °
Alto, Saturday, 24 October
Partly cloudy. High 58°, low 36°.
Pressure30.24 inHg
Wind3.4 mph NW
Humidity40%
Visibility6.2 mi
Dew point27°
Sun, 2560° / 38°0
60 °
Alto, Sunday, 25 October
Overcast. High 60°, low 38°.
Pressure30.27 inHg
Wind4.7 mph NW
Humidity48%
Visibility—
Dew point32°
Mon, 2654° / 41°0
54 °
Alto, Monday, 26 October
Clear. High 54°, low 41°.
Pressure30.36 inHg
Wind4.1 mph N
Humidity44%
Visibility—
Dew point27°
Tue, 2755° / 40°0
55 °
Alto, Tuesday, 27 October
Clear. High 55°, low 40°.
Pressure30.27 inHg
Wind5.1 mph N
Humidity40%
Visibility—
Dew point25°
Wed, 2854° / 41°0
54 °
Alto, Wednesday, 28 October
Overcast. High 54°, low 41°.
Pressure30.18 inHg
Wind4.4 mph NW
Humidity42%
Visibility—
Dew point26°
Thu, 2957° / 42°0
57 °
Alto, Thursday, 29 October
Partly cloudy. High 57°, low 42°.
Pressure30.00 inHg
Wind6.2 mph W
Humidity37%
Visibility—
Dew point25°
Fri, 3058° / 46°0
58 °
Alto, Friday, 30 October
Overcast. High 58°, low 46°.
Pressure29.80 inHg
Wind17.6 mph SW
Humidity36%
Visibility—
Dew point27°
Sat, 3154° / 44°0
54 °
Alto, Saturday, 31 October
Overcast. High 54°, low 44°.
Pressure29.71 inHg
Wind27.9 mph SW
Humidity54%
Visibility—
Dew point33°
Sun, 0151° / 41°0
51 °
Alto, Sunday, 1 November
Clear. High 51°, low 41°.
Pressure30.00 inHg
Wind21.7 mph SW
Humidity49%
Visibility—
Dew point29°
Mon, 0252° / 40°0
52 °
Alto, Monday, 2 November
Overcast. High 52°, low 40°.
Pressure30.15 inHg
Wind4.5 mph W
Humidity37%
Visibility—
Dew point22°
Tue, 0352° / 43°0
52 °
Alto, Tuesday, 3 November
Overcast. High 52°, low 43°.
Pressure30.12 inHg
Wind4.7 mph NW
Humidity37%
Visibility—
Dew point23°
Wed, 0451° / 43°0.14
51 °
Alto, Wednesday, 4 November
Light rain. High 51°, low 43°.
Pressure29.94 inHg
Wind5.1 mph SW
Humidity77%
Visibility—
Dew point37°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 0553° / 39°0.1
53 °
Alto, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.1 in
Chance of precipitation42%
Record high69° (1975)
Record low20° (1973)
Fri, 0653° / 38°0.11
53 °
Alto, Friday, 6 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.11 in
Chance of precipitation47%
Record high69° (2014)
Record low22° (2003)
Sat, 0753° / 38°0.13
53 °
Alto, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.13 in
Chance of precipitation42%
Record high68° (1978)
Record low24° (2003)
Sun, 0852° / 38°0.09
52 °
Alto, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.09 in
Chance of precipitation37%
Record high67° (2016)
Record low26° (1966)
Mon, 0951° / 37°0.07
51 °
Alto, Monday, 9 November
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.07 in
Chance of precipitation43%
Record high64° (2016)
Record low23° (1986)
Tue, 1050° / 37°0.07
50 °
Alto, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.07 in
Chance of precipitation38%
Record high66° (1989)
Record low13° (1986)
Wed, 1151° / 37°0.08
51 °
Alto, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.08 in
Chance of precipitation38%
Record high69° (1990)
Record low11° (2000)
Thu, 1251° / 37°0.11
51 °
Alto, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.11 in
Chance of precipitation37%
Record high74° (1999)
Record low10° (2000)
Fri, 1350° / 37°0.1
50 °
Alto, Friday, 13 November
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.1 in
Chance of precipitation52%
Record high71° (1999)
Record low9° (2000)
Sat, 1449° / 37°0.05
49 °
Alto, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high49°
Average low37°
Average precipitation0.05 in
Chance of precipitation30%
Record high68° (1999)
Record low17° (2000)
Sun, 1551° / 36°0.06
51 °
Alto, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high51°
Average low36°
Average precipitation0.06 in
Chance of precipitation40%
Record high68° (2021)
Record low13° (1964)
Mon, 1649° / 36°0.1
49 °
Alto, Monday, 16 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.1 in
Chance of precipitation53%
Record high65° (1999)
Record low11° (1964)
Tue, 1749° / 37°0.11
49 °
Alto, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high49°
Average low37°
Average precipitation0.11 in
Chance of precipitation48%
Record high65° (1976)
Record low14° (2000)
Wed, 1848° / 35°0.09
48 °
Alto, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.09 in
Chance of precipitation45%
Record high62° (1965)
Record low16° (2000)
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 Alto, 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 Alto, 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.