Monthly outlook for Iron Lightning, SD: average high 58.2°, average low 41°. That is 4.1° above the climate normal for October. Precipitation is expected on 3 days (about 0.5 inches), against a normal of 2 days and 0.6 inches. The warmest day looks like 2 November (69°), the coolest 26 October (28.4°).
58.2°/41°
Average high / low
+4.1°
Above normal
3 / 2
Wet days / normal
0.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
25 October – 3 November
57.2°
52.4°
+2.7°
4 November – 13 November
59.9°
46.1°
+7.7°
14 November – 23 November
at normal
41.6°
—
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).
Mon, 2638° / 28°0.33
38 °
Iron Lightning, Monday, 26 October
Snow. High 38°, low 28°.
Pressure30.45 inHg
Wind11.9 mph E
Humidity93%
Visibility3.9 mi
Dew point36°
Tue, 2758° / 30°0
58 °
Iron Lightning, Tuesday, 27 October
Partly cloudy. High 58°, low 30°.
Pressure29.91 inHg
Wind14.6 mph SE
Humidity72%
Visibility6.2 mi
Dew point36°
Wed, 2861° / 34°0
61 °
Iron Lightning, Wednesday, 28 October
Clear. High 61°, low 34°.
Pressure30.00 inHg
Wind3.2 mph NW
Humidity53%
Visibility6.2 mi
Dew point38°
Thu, 2961° / 35°0
61 °
Iron Lightning, Thursday, 29 October
Clear. High 61°, low 35°.
Pressure30.09 inHg
Wind9.8 mph S
Humidity53%
Visibility—
Dew point37°
Fri, 3053° / 40°0
53 °
Iron Lightning, Friday, 30 October
Overcast. High 53°, low 40°.
Pressure30.21 inHg
Wind14 mph NE
Humidity71%
Visibility—
Dew point38°
Sat, 3161° / 49°0
61 °
Iron Lightning, Saturday, 31 October
Overcast. High 61°, low 49°.
Pressure29.91 inHg
Wind10.6 mph E
Humidity85%
Visibility—
Dew point52°
Sun, 0169° / 51°0
69 °
Iron Lightning, Sunday, 1 November
Overcast. High 69°, low 51°.
Pressure29.94 inHg
Wind18.7 mph SE
Humidity63%
Visibility—
Dew point50°
Mon, 0269° / 46°0.1
69 °
Iron Lightning, Monday, 2 November
Light rain. High 69°, low 46°.
Pressure29.32 inHg
Wind32 mph W
Humidity28%
Visibility—
Dew point33°
Tue, 0356° / 45°0
56 °
Iron Lightning, Tuesday, 3 November
Clear. High 56°, low 45°.
Pressure30.00 inHg
Wind28.1 mph NW
Humidity31%
Visibility—
Dew point22°
Wed, 0455° / 40°0
55 °
Iron Lightning, Wednesday, 4 November
Overcast. High 55°, low 40°.
Pressure30.00 inHg
Wind14.2 mph NW
Humidity38%
Visibility—
Dew point25°
Thu, 0560° / 44°0
60 °
Iron Lightning, Thursday, 5 November
Overcast. High 60°, low 44°.
Pressure29.88 inHg
Wind8.6 mph SW
Humidity37%
Visibility—
Dew point28°
Fri, 0663° / 47°0
63 °
Iron Lightning, Friday, 6 November
Overcast. High 63°, low 47°.
Pressure29.50 inHg
Wind18.4 mph SE
Humidity41%
Visibility—
Dew point31°
Sat, 0760° / 48°0
60 °
Iron Lightning, Saturday, 7 November
Overcast. High 60°, low 48°.
Pressure29.44 inHg
Wind18.1 mph NW
Humidity57%
Visibility—
Dew point41°
Sun, 0854° / 42°0
54 °
Iron Lightning, Sunday, 8 November
Clear. High 54°, low 42°.
Pressure29.91 inHg
Wind19.5 mph NW
Humidity43%
Visibility—
Dew point28°
Mon, 0966° / 42°0
66 °
Iron Lightning, Monday, 9 November
Overcast. High 66°, low 42°.
Pressure30.06 inHg
Wind9 mph SW
Humidity32%
Visibility—
Dew point26°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Mon, 2338° / 23°0.02
38 °
Iron Lightning, Monday, 23 November
Climate normal for this date — 60-year average.
Average high38°
Average low23°
Average precipitation0.02 in
Chance of precipitation13%
Record high63° (2017)
Record low-13° (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.