Monthly outlook for Hanna, SD: average high 54°, average low 35.3°. That is 0.3° below the climate normal for October. Precipitation is expected on 3 days (about 1.5 inches), against a normal of 4 days and 1.0 inches. The warmest day looks like 17 October (70.1°), the coolest 16 October (22.6°).
54°/35.3°
Average high / low
−0.3°
Below normal
3 / 4
Wet days / normal
1.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
14 October – 23 October
55.5°
55.6°
-0°
24 October – 2 November
51.5°
50.8°
+0.4°
3 November – 12 November
at normal
46.2°
—
October records over 66 years
86.9°4 October 1963All-time high
-5.4°30 October 1991All-time low
Climate normals and records are computed from the nearest reference point — Mountain Plains (14 mi).
Thu, 1537° / 27°0.01
37 °
Hanna, Thursday, 15 October
Light rain. High 37°, low 27°.
Pressure30.45 inHg
Wind18.3 mph NW
Humidity59%
Visibility6.2 mi
Dew point17°
Fri, 1654° / 23°0
54 °
Hanna, Friday, 16 October
Clear. High 54°, low 23°.
Pressure30.56 inHg
Wind0.2 mph SW
Humidity35%
Visibility6.2 mi
Dew point1°
Sat, 1770° / 44°0
70 °
Hanna, Saturday, 17 October
Clear. High 70°, low 44°.
Pressure30.03 inHg
Wind7.3 mph SW
Humidity21%
Visibility6.2 mi
Dew point17°
Sun, 1857° / 43°0
57 °
Hanna, Sunday, 18 October
Clear. High 57°, low 43°.
Pressure30.15 inHg
Wind10.5 mph S
Humidity40%
Visibility—
Dew point30°
Mon, 1963° / 43°0
63 °
Hanna, Monday, 19 October
Mostly clear. High 63°, low 43°.
Pressure29.85 inHg
Wind11.5 mph SW
Humidity29%
Visibility—
Dew point28°
Tue, 2066° / 44°0
66 °
Hanna, Tuesday, 20 October
Clear. High 66°, low 44°.
Pressure29.91 inHg
Wind9 mph SW
Humidity14%
Visibility—
Dew point13°
Wed, 2159° / 38°0
59 °
Hanna, Wednesday, 21 October
Overcast. High 59°, low 38°.
Pressure30.12 inHg
Wind6.2 mph S
Humidity27%
Visibility—
Dew point22°
Thu, 2259° / 39°0
59 °
Hanna, Thursday, 22 October
Clear. High 59°, low 39°.
Pressure29.94 inHg
Wind17.5 mph S
Humidity41%
Visibility—
Dew point33°
Fri, 2350° / 38°1.21
50 °
Hanna, Friday, 23 October
Heavy rain. High 50°, low 38°.
Pressure29.94 inHg
Wind15 mph S
Humidity90%
Visibility—
Dew point47°
Sat, 2436° / 24°0.19
36 °
Hanna, Saturday, 24 October
Snow. High 36°, low 24°.
Pressure30.36 inHg
Wind14.6 mph N
Humidity76%
Visibility—
Dew point27°
Sun, 2555° / 24°0
55 °
Hanna, Sunday, 25 October
Mostly clear. High 55°, low 24°.
Pressure30.06 inHg
Wind8.9 mph SW
Humidity16%
Visibility—
Dew point5°
Mon, 2657° / 35°0
57 °
Hanna, Monday, 26 October
Clear. High 57°, low 35°.
Pressure29.83 inHg
Wind6.2 mph W
Humidity20%
Visibility—
Dew point14°
Tue, 2754° / 36°0
54 °
Hanna, Tuesday, 27 October
Clear. High 54°, low 36°.
Pressure29.65 inHg
Wind10.2 mph SW
Humidity33%
Visibility—
Dew point24°
Wed, 2852° / 33°0
52 °
Hanna, Wednesday, 28 October
Partly cloudy. High 52°, low 33°.
Pressure29.80 inHg
Wind16 mph SW
Humidity36%
Visibility—
Dew point21°
Thu, 2956° / 43°0
56 °
Hanna, Thursday, 29 October
Overcast. High 56°, low 43°.
Pressure29.56 inHg
Wind18 mph SW
Humidity34%
Visibility—
Dew point25°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 3048° / 31°0.04
48 °
Hanna, Friday, 30 October
Climate normal for this date — 60-year average.
Average high48°
Average low31°
Average precipitation0.04 in
Chance of precipitation27%
Record high73° (1968)
Record low-5° (1991)
Sat, 3148° / 31°0.05
48 °
Hanna, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high48°
Average low31°
Average precipitation0.05 in
Chance of precipitation23%
Record high71° (1999)
Record low1° (1991)
Sun, 0148° / 31°0.08
48 °
Hanna, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high48°
Average low31°
Average precipitation0.08 in
Chance of precipitation25%
Record high70° (1965)
Record low0° (2002)
Mon, 0247° / 31°0.05
47 °
Hanna, Monday, 2 November
Climate normal for this date — 60-year average.
Average high47°
Average low31°
Average precipitation0.05 in
Chance of precipitation25%
Record high73° (2008)
Record low-8° (1991)
Tue, 0347° / 31°0.04
47 °
Hanna, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high47°
Average low31°
Average precipitation0.04 in
Chance of precipitation23%
Record high71° (2020)
Record low-1° (1991)
Wed, 0450° / 31°0.02
50 °
Hanna, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high50°
Average low31°
Average precipitation0.02 in
Chance of precipitation17%
Record high71° (1978)
Record low8° (1967)
Thu, 0548° / 31°0.04
48 °
Hanna, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high48°
Average low31°
Average precipitation0.04 in
Chance of precipitation25%
Record high72° (2020)
Record low3° (2003)
Fri, 0648° / 30°0.06
48 °
Hanna, Friday, 6 November
Climate normal for this date — 60-year average.
Average high48°
Average low30°
Average precipitation0.06 in
Chance of precipitation18%
Record high70° (2020)
Record low7° (1991)
Sat, 0748° / 30°0.04
48 °
Hanna, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high48°
Average low30°
Average precipitation0.04 in
Chance of precipitation17%
Record high73° (1999)
Record low5° (1991)
Sun, 0846° / 30°0.06
46 °
Hanna, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high46°
Average low30°
Average precipitation0.06 in
Chance of precipitation22%
Record high74° (1999)
Record low7° (2000)
Mon, 0943° / 28°0.07
43 °
Hanna, Monday, 9 November
Climate normal for this date — 60-year average.
Average high43°
Average low28°
Average precipitation0.07 in
Chance of precipitation28%
Record high70° (2016)
Record low0° (1966)
Tue, 1045° / 26°0.05
45 °
Hanna, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high45°
Average low26°
Average precipitation0.05 in
Chance of precipitation23%
Record high67° (2007)
Record low-6° (1986)
Wed, 1142° / 26°0.02
42 °
Hanna, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high42°
Average low26°
Average precipitation0.02 in
Chance of precipitation25%
Record high67° (2005)
Record low0° (2014)
Thu, 1245° / 27°0.02
45 °
Hanna, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high45°
Average low27°
Average precipitation0.02 in
Chance of precipitation18%
Record high73° (1999)
Record low-9° (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 Hanna, 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 Hanna, 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.