Monthly outlook for Harrold, SD: average high 62.7°, average low 44.4°. That is 2.4° above the climate normal for October. Precipitation is expected on 2 days (about 0.7 inches), against a normal of 3 days and 0.8 inches. The warmest day looks like 10 October (86.6°), the coolest 17 October (27.6°).
62.7°/44.4°
Average high / low
+2.4°
Above normal
2 / 3
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
10 October – 19 October
60.5°
59.4°
+0.6°
20 October – 29 October
66.5°
55.5°
+6.1°
30 October – 8 November
at normal
49.3°
—
October records over 66 years
90.9°3 October 2025All-time high
-0.4°26 October 2020All-time low
Sun, 1168° / 53°0
68 °
Harrold, Sunday, 11 October
Overcast. High 68°, low 53°.
Pressure29.71 inHg
Wind12.5 mph NE
Humidity68%
Visibility6.2 mi
Dew point55°
Mon, 1261° / 50°0.53
61 °
Harrold, Monday, 12 October
Heavy rain. High 61°, low 50°.
Pressure29.83 inHg
Wind8.5 mph NE
Humidity90%
Visibility4.1 mi
Dew point50°
Tue, 1354° / 46°0.16
54 °
Harrold, Tuesday, 13 October
Rain. High 54°, low 46°.
Pressure30.12 inHg
Wind6.6 mph N
Humidity85%
Visibility2.3 mi
Dew point42°
Wed, 1458° / 43°0
58 °
Harrold, Wednesday, 14 October
Clear. High 58°, low 43°.
Pressure30.30 inHg
Wind5.7 mph E
Humidity55%
Visibility—
Dew point38°
Thu, 1562° / 45°0
62 °
Harrold, Thursday, 15 October
Overcast. High 62°, low 45°.
Pressure30.33 inHg
Wind14.3 mph N
Humidity57%
Visibility—
Dew point42°
Fri, 1645° / 35°0.01
45 °
Harrold, Friday, 16 October
Light rain. High 45°, low 35°.
Pressure30.09 inHg
Wind30.3 mph W
Humidity53%
Visibility—
Dew point27°
Sat, 1741° / 28°0
41 °
Harrold, Saturday, 17 October
Clear. High 41°, low 28°.
Pressure30.68 inHg
Wind20.8 mph NW
Humidity43%
Visibility—
Dew point16°
Sun, 1859° / 30°0
59 °
Harrold, Sunday, 18 October
Mostly clear. High 59°, low 30°.
Pressure30.15 inHg
Wind23 mph S
Humidity29%
Visibility—
Dew point17°
Mon, 1970° / 42°0
70 °
Harrold, Monday, 19 October
Mostly clear. High 70°, low 42°.
Pressure29.94 inHg
Wind15.2 mph S
Humidity28%
Visibility—
Dew point28°
Tue, 2070° / 47°0
70 °
Harrold, Tuesday, 20 October
Clear. High 70°, low 47°.
Pressure29.88 inHg
Wind14.7 mph SE
Humidity40%
Visibility—
Dew point37°
Wed, 2182° / 55°0
82 °
Harrold, Wednesday, 21 October
Partly cloudy. High 82°, low 55°.
Pressure29.68 inHg
Wind18.5 mph S
Humidity30%
Visibility—
Dew point39°
Thu, 2263° / 51°0
63 °
Harrold, Thursday, 22 October
Overcast. High 63°, low 51°.
Pressure29.94 inHg
Wind17.6 mph NW
Humidity41%
Visibility—
Dew point36°
Fri, 2368° / 47°0
68 °
Harrold, Friday, 23 October
Overcast. High 68°, low 47°.
Pressure29.68 inHg
Wind12 mph N
Humidity24%
Visibility—
Dew point27°
Sat, 2455° / 39°0
55 °
Harrold, Saturday, 24 October
Overcast. High 55°, low 39°.
Pressure29.94 inHg
Wind24.5 mph W
Humidity62%
Visibility—
Dew point35°
Sun, 2562° / 36°0
62 °
Harrold, Sunday, 25 October
Overcast. High 62°, low 36°.
Pressure29.59 inHg
Wind18.1 mph S
Humidity37%
Visibility—
Dew point26°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2656° / 38°0.02
56 °
Harrold, Monday, 26 October
Climate normal for this date — 60-year average.
Average high56°
Average low38°
Average precipitation0.02 in
Chance of precipitation12%
Record high74° (1990)
Record low0° (2020)
Tue, 2754° / 37°0.04
54 °
Harrold, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high54°
Average low37°
Average precipitation0.04 in
Chance of precipitation22%
Record high72° (2016)
Record low7° (2020)
Wed, 2853° / 36°0.05
53 °
Harrold, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high53°
Average low36°
Average precipitation0.05 in
Chance of precipitation15%
Record high74° (2016)
Record low20° (2023)
Thu, 2952° / 36°0.06
52 °
Harrold, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high52°
Average low36°
Average precipitation0.06 in
Chance of precipitation27%
Record high74° (1978)
Record low15° (1991)
Fri, 3051° / 35°0.05
51 °
Harrold, Friday, 30 October
Climate normal for this date — 60-year average.
Average high51°
Average low35°
Average precipitation0.05 in
Chance of precipitation25%
Record high72° (1965)
Record low10° (1991)
Sat, 3151° / 34°0.04
51 °
Harrold, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high51°
Average low34°
Average precipitation0.04 in
Chance of precipitation17%
Record high78° (2016)
Record low15° (1991)
Sun, 0149° / 35°0.02
49 °
Harrold, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.02 in
Chance of precipitation15%
Record high73° (1990)
Record low16° (1991)
Mon, 0250° / 33°0.02
50 °
Harrold, Monday, 2 November
Climate normal for this date — 60-year average.
Average high50°
Average low33°
Average precipitation0.02 in
Chance of precipitation15%
Record high72° (1978)
Record low9° (1991)
Tue, 0349° / 34°0.02
49 °
Harrold, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high49°
Average low34°
Average precipitation0.02 in
Chance of precipitation20%
Record high71° (1978)
Record low5° (1991)
Wed, 0449° / 32°0.01
49 °
Harrold, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high49°
Average low32°
Average precipitation0.01 in
Chance of precipitation8%
Record high74° (1978)
Record low4° (1991)
Thu, 0549° / 33°0.04
49 °
Harrold, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high49°
Average low33°
Average precipitation0.04 in
Chance of precipitation15%
Record high73° (2016)
Record low9° (2003)
Fri, 0649° / 31°0.02
49 °
Harrold, Friday, 6 November
Climate normal for this date — 60-year average.
Average high49°
Average low31°
Average precipitation0.02 in
Chance of precipitation15%
Record high73° (2020)
Record low2° (2003)
Sat, 0749° / 31°0.03
49 °
Harrold, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high49°
Average low31°
Average precipitation0.03 in
Chance of precipitation15%
Record high70° (2006)
Record low3° (1971)
Sun, 0848° / 31°0.07
48 °
Harrold, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high48°
Average low31°
Average precipitation0.07 in
Chance of precipitation17%
Record high75° (1999)
Record low8° (2003)
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 Harrold, 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 Harrold, 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.