Monthly outlook for Iron Lightning, SD: average high 56.6°, average low 40.7°. That is 2.9° above the climate normal for October. Precipitation is expected on 2 days (about 0.8 inches), against a normal of 2 days and 0.5 inches. The warmest day looks like 30 October (67.5°), the coolest 27 October (32°).
56.6°/40.7°
Average high / low
+2.9°
Above normal
2 / 2
Wet days / normal
0.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
24 October – 2 November
53.2°
53.1°
+0.1°
3 November – 12 November
62.4°
46.5°
+8.8°
13 November – 22 November
at normal
42.4°
—
October records over 66 years
93.2°4 October 1963All-time high
-5.4°26 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Thunder Butte (9 mi).
Sun, 2549° / 36°0.09
49 °
Iron Lightning, Sunday, 25 October
Light rain. High 49°, low 36°.
Pressure30.47 inHg
Wind8.8 mph E
Humidity51%
Visibility6.2 mi
Dew point22°
Mon, 2642° / 32°0.65
42 °
Iron Lightning, Monday, 26 October
Snow. High 42°, low 32°.
Pressure30.45 inHg
Wind12.8 mph E
Humidity94%
Visibility1.3 mi
Dew point34°
Tue, 2745° / 32°0
45 °
Iron Lightning, Tuesday, 27 October
Overcast. High 45°, low 32°.
Pressure29.94 inHg
Wind10.6 mph SE
Humidity86%
Visibility6.2 mi
Dew point33°
Wed, 2859° / 34°0
59 °
Iron Lightning, Wednesday, 28 October
Overcast. High 59°, low 34°.
Pressure30.03 inHg
Wind8.8 mph W
Humidity47%
Visibility6.2 mi
Dew point35°
Thu, 2958° / 33°0
58 °
Iron Lightning, Thursday, 29 October
Partly cloudy. High 58°, low 33°.
Pressure30.18 inHg
Wind16.4 mph SE
Humidity59%
Visibility—
Dew point36°
Fri, 3067° / 48°0
67 °
Iron Lightning, Friday, 30 October
Partly cloudy. High 67°, low 48°.
Pressure29.77 inHg
Wind12 mph SE
Humidity65%
Visibility—
Dew point49°
Sat, 3157° / 47°0
57 °
Iron Lightning, Saturday, 31 October
Overcast. High 57°, low 47°.
Pressure29.68 inHg
Wind20.8 mph NW
Humidity61%
Visibility—
Dew point42°
Sun, 0148° / 39°0.02
48 °
Iron Lightning, Sunday, 1 November
Light rain. High 48°, low 39°.
Pressure29.97 inHg
Wind22.5 mph NW
Humidity31%
Visibility—
Dew point18°
Mon, 0251° / 35°0
51 °
Iron Lightning, Monday, 2 November
Clear. High 51°, low 35°.
Pressure30.33 inHg
Wind13.8 mph NW
Humidity33%
Visibility—
Dew point17°
Tue, 0357° / 40°0
57 °
Iron Lightning, Tuesday, 3 November
Overcast. High 57°, low 40°.
Pressure30.00 inHg
Wind12.3 mph SE
Humidity35%
Visibility—
Dew point24°
Wed, 0455° / 45°0.02
55 °
Iron Lightning, Wednesday, 4 November
Light rain. High 55°, low 45°.
Pressure29.65 inHg
Wind10.6 mph SE
Humidity56%
Visibility—
Dew point37°
Thu, 0563° / 44°0
63 °
Iron Lightning, Thursday, 5 November
Clear. High 63°, low 44°.
Pressure29.97 inHg
Wind9.3 mph W
Humidity42%
Visibility—
Dew point34°
Fri, 0665° / 47°0
65 °
Iron Lightning, Friday, 6 November
Overcast. High 65°, low 47°.
Pressure30.12 inHg
Wind8.6 mph NW
Humidity34%
Visibility—
Dew point32°
Sat, 0767° / 52°0
67 °
Iron Lightning, Saturday, 7 November
Overcast. High 67°, low 52°.
Pressure30.06 inHg
Wind14.2 mph S
Humidity37%
Visibility—
Dew point35°
Sun, 0867° / 50°0
67 °
Iron Lightning, Sunday, 8 November
Partly cloudy. High 67°, low 50°.
Pressure29.71 inHg
Wind18.5 mph W
Humidity38%
Visibility—
Dew point37°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0944° / 28°0.04
44 °
Iron Lightning, Monday, 9 November
Climate normal for this date — 60-year average.
Average high44°
Average low28°
Average precipitation0.04 in
Chance of precipitation18%
Record high69° (2001)
Record low2° (2000)
Tue, 1043° / 26°0.06
43 °
Iron Lightning, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high43°
Average low26°
Average precipitation0.06 in
Chance of precipitation27%
Record high68° (2007)
Record low-5° (1986)
Wed, 1141° / 25°0.01
41 °
Iron Lightning, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high41°
Average low25°
Average precipitation0.01 in
Chance of precipitation8%
Record high68° (2005)
Record low-11° (1986)
Thu, 1243° / 26°0.02
43 °
Iron Lightning, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high43°
Average low26°
Average precipitation0.02 in
Chance of precipitation15%
Record high71° (1999)
Record low-7° (1986)
Fri, 1345° / 28°0.02
45 °
Iron Lightning, Friday, 13 November
Climate normal for this date — 60-year average.
Average high45°
Average low28°
Average precipitation0.02 in
Chance of precipitation17%
Record high69° (1990)
Record low-18° (1986)
Sat, 1444° / 28°0.02
44 °
Iron Lightning, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high44°
Average low28°
Average precipitation0.02 in
Chance of precipitation12%
Record high70° (1990)
Record low-9° (2014)
Sun, 1543° / 27°0.02
43 °
Iron Lightning, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high43°
Average low27°
Average precipitation0.02 in
Chance of precipitation10%
Record high66° (2001)
Record low0° (2014)
Mon, 1644° / 26°0.02
44 °
Iron Lightning, Monday, 16 November
Climate normal for this date — 60-year average.
Average high44°
Average low26°
Average precipitation0.02 in
Chance of precipitation7%
Record high67° (2001)
Record low-5° (2022)
Tue, 1742° / 26°0.02
42 °
Iron Lightning, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high42°
Average low26°
Average precipitation0.02 in
Chance of precipitation12%
Record high64° (2001)
Record low2° (2000)
Wed, 1842° / 25°0.03
42 °
Iron Lightning, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high42°
Average low25°
Average precipitation0.03 in
Chance of precipitation20%
Record high64° (2007)
Record low0° (1996)
Thu, 1941° / 26°0.03
41 °
Iron Lightning, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high41°
Average low26°
Average precipitation0.03 in
Chance of precipitation15%
Record high67° (2003)
Record low4° (1985)
Fri, 2040° / 24°0.02
40 °
Iron Lightning, Friday, 20 November
Climate normal for this date — 60-year average.
Average high40°
Average low24°
Average precipitation0.02 in
Chance of precipitation8%
Record high62° (1962)
Record low-10° (1985)
Sat, 2140° / 23°0.02
40 °
Iron Lightning, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high40°
Average low23°
Average precipitation0.02 in
Chance of precipitation12%
Record high65° (2012)
Record low-10° (1985)
Sun, 2241° / 24°0.02
41 °
Iron Lightning, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high41°
Average low24°
Average precipitation0.02 in
Chance of precipitation17%
Record high63° (2002)
Record low-5° (1985)
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 Iron Lightning, 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 Iron Lightning, 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.