Monthly outlook for Alto, SD: average high 61.9°, average low 43.7°. That is 1.8° above the climate normal for October. Precipitation is expected on 1 day (about 0.2 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 20 October (81.9°), the coolest 26 October (33.7°).
61.9°/43.7°
Average high / low
+1.8°
Above normal
1 / 3
Wet days / normal
0.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
12 October – 21 October
65°
59.7°
+2.9°
22 October – 31 October
56.8°
55.2°
+0.9°
1 November – 10 November
at normal
49.1°
—
October records over 66 years
91°3 October 2025All-time high
1°27 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Canning (7 mi).
Tue, 1353° / 42°0
53 °
Alto, Tuesday, 13 October
Light rain. High 53°, low 42°.
Pressure30.09 inHg
Wind7 mph NW
Humidity66%
Visibility6.2 mi
Dew point39°
Wed, 1457° / 39°0.03
57 °
Alto, Wednesday, 14 October
Light rain. High 57°, low 39°.
Pressure30.24 inHg
Wind2.9 mph E
Humidity54%
Visibility6.2 mi
Dew point37°
Thu, 1561° / 47°0.12
61 °
Alto, Thursday, 15 October
Rain. High 61°, low 47°.
Pressure30.27 inHg
Wind14.9 mph NW
Humidity52%
Visibility6.2 mi
Dew point39°
Fri, 1655° / 36°0
55 °
Alto, Friday, 16 October
Clear. High 55°, low 36°.
Pressure30.74 inHg
Wind13.4 mph NW
Humidity49%
Visibility—
Dew point30°
Sat, 1772° / 41°0
72 °
Alto, Saturday, 17 October
Clear. High 72°, low 41°.
Pressure30.00 inHg
Wind13.9 mph S
Humidity32%
Visibility—
Dew point29°
Sun, 1877° / 52°0
77 °
Alto, Sunday, 18 October
Clear. High 77°, low 52°.
Pressure29.88 inHg
Wind8 mph S
Humidity25%
Visibility—
Dew point32°
Mon, 1973° / 51°0
73 °
Alto, Monday, 19 October
Clear. High 73°, low 51°.
Pressure29.94 inHg
Wind10.6 mph E
Humidity34%
Visibility—
Dew point37°
Tue, 2082° / 52°0
82 °
Alto, Tuesday, 20 October
Mostly clear. High 82°, low 52°.
Pressure29.56 inHg
Wind19.2 mph S
Humidity32%
Visibility—
Dew point40°
Wed, 2158° / 52°0
58 °
Alto, Wednesday, 21 October
Overcast. High 58°, low 52°.
Pressure29.88 inHg
Wind16.1 mph NW
Humidity45%
Visibility—
Dew point33°
Thu, 2259° / 46°0
59 °
Alto, Thursday, 22 October
Mostly clear. High 59°, low 46°.
Pressure29.97 inHg
Wind27.3 mph NW
Humidity31%
Visibility—
Dew point25°
Fri, 2354° / 38°0
54 °
Alto, Friday, 23 October
Clear. High 54°, low 38°.
Pressure30.21 inHg
Wind16 mph SE
Humidity33%
Visibility—
Dew point20°
Sat, 2467° / 45°0
67 °
Alto, Saturday, 24 October
Overcast. High 67°, low 45°.
Pressure29.59 inHg
Wind18.7 mph SE
Humidity36%
Visibility—
Dew point32°
Sun, 2554° / 41°0
54 °
Alto, Sunday, 25 October
Overcast. High 54°, low 41°.
Pressure29.94 inHg
Wind18.3 mph N
Humidity45%
Visibility—
Dew point30°
Mon, 2652° / 34°0
52 °
Alto, Monday, 26 October
Partly cloudy. High 52°, low 34°.
Pressure30.18 inHg
Wind6.5 mph N
Humidity46%
Visibility—
Dew point26°
Tue, 2755° / 38°0
55 °
Alto, Tuesday, 27 October
Partly cloudy. High 55°, low 38°.
Pressure30.03 inHg
Wind5.4 mph NW
Humidity38%
Visibility—
Dew point28°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 2854° / 37°0.06
54 °
Alto, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high54°
Average low37°
Average precipitation0.06 in
Chance of precipitation15%
Record high75° (2016)
Record low20° (2023)
Thu, 2953° / 37°0.07
53 °
Alto, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high53°
Average low37°
Average precipitation0.07 in
Chance of precipitation27%
Record high76° (1978)
Record low16° (1991)
Fri, 3052° / 36°0.05
52 °
Alto, Friday, 30 October
Climate normal for this date — 60-year average.
Average high52°
Average low36°
Average precipitation0.05 in
Chance of precipitation23%
Record high74° (1965)
Record low12° (1991)
Sat, 3153° / 36°0.04
53 °
Alto, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high53°
Average low36°
Average precipitation0.04 in
Chance of precipitation18%
Record high80° (1990)
Record low16° (1991)
Sun, 0150° / 36°0.02
50 °
Alto, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high50°
Average low36°
Average precipitation0.02 in
Chance of precipitation15%
Record high74° (1990)
Record low16° (1991)
Mon, 0251° / 35°0.02
51 °
Alto, Monday, 2 November
Climate normal for this date — 60-year average.
Average high51°
Average low35°
Average precipitation0.02 in
Chance of precipitation17%
Record high73° (2022)
Record low9° (1991)
Tue, 0350° / 35°0.02
50 °
Alto, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high50°
Average low35°
Average precipitation0.02 in
Chance of precipitation17%
Record high71° (1978)
Record low6° (1991)
Wed, 0450° / 33°0.01
50 °
Alto, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high50°
Average low33°
Average precipitation0.01 in
Chance of precipitation8%
Record high76° (1978)
Record low6° (1991)
Thu, 0551° / 34°0.04
51 °
Alto, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high51°
Average low34°
Average precipitation0.04 in
Chance of precipitation15%
Record high74° (2001)
Record low14° (2003)
Fri, 0650° / 32°0.02
50 °
Alto, Friday, 6 November
Climate normal for this date — 60-year average.
Average high50°
Average low32°
Average precipitation0.02 in
Chance of precipitation15%
Record high74° (2020)
Record low4° (2003)
Sat, 0750° / 32°0.04
50 °
Alto, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high50°
Average low32°
Average precipitation0.04 in
Chance of precipitation13%
Record high71° (2006)
Record low1° (1971)
Sun, 0849° / 32°0.07
49 °
Alto, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high49°
Average low32°
Average precipitation0.07 in
Chance of precipitation17%
Record high78° (1999)
Record low10° (1991)
Mon, 0946° / 31°0.04
46 °
Alto, Monday, 9 November
Climate normal for this date — 60-year average.
Average high46°
Average low31°
Average precipitation0.04 in
Chance of precipitation22%
Record high67° (2016)
Record low10° (1966)
Tue, 1044° / 28°0.05
44 °
Alto, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high44°
Average low28°
Average precipitation0.05 in
Chance of precipitation23%
Record high67° (1989)
Record low2° (1986)
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, SD 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, SD 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.