Monthly outlook for Iron Lightning, SD: average high 58.5°, average low 41.9°. That is 3.9° above the climate normal for October. Precipitation is expected on 2 days (about 0.5 inches), against a normal of 2 days and 0.5 inches. The warmest day looks like 6 November (66.3°), the coolest 27 October (32.4°).
58.5°/41.9°
Average high / low
+3.9°
Above normal
2 / 2
Wet days / normal
0.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
24 October – 2 November
55.9°
53.1°
+1.6°
3 November – 12 November
62.8°
46.5°
+9.1°
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, 2550° / 35°0.05
50 °
Iron Lightning, Sunday, 25 October
Light rain. High 50°, low 35°.
Pressure30.45 inHg
Wind9.5 mph E
Humidity47%
Visibility6.2 mi
Dew point24°
Mon, 2641° / 33°0.41
41 °
Iron Lightning, Monday, 26 October
Snow. High 41°, low 33°.
Pressure30.45 inHg
Wind13.6 mph E
Humidity93%
Visibility2.1 mi
Dew point35°
Tue, 2744° / 32°0.02
44 °
Iron Lightning, Tuesday, 27 October
Light rain. High 44°, low 32°.
Pressure29.97 inHg
Wind12.6 mph SE
Humidity84%
Visibility6.2 mi
Dew point33°
Wed, 2860° / 35°0
60 °
Iron Lightning, Wednesday, 28 October
Clear. High 60°, low 35°.
Pressure30.03 inHg
Wind6.3 mph SW
Humidity56%
Visibility6.2 mi
Dew point39°
Thu, 2962° / 35°0
62 °
Iron Lightning, Thursday, 29 October
Partly cloudy. High 62°, low 35°.
Pressure30.06 inHg
Wind14.2 mph SE
Humidity63%
Visibility—
Dew point40°
Fri, 3062° / 44°0
62 °
Iron Lightning, Friday, 30 October
Overcast. High 62°, low 44°.
Pressure29.97 inHg
Wind12.3 mph E
Humidity77%
Visibility—
Dew point46°
Sat, 3164° / 49°0
64 °
Iron Lightning, Saturday, 31 October
Overcast. High 64°, low 49°.
Pressure29.71 inHg
Wind8.4 mph N
Humidity60%
Visibility—
Dew point45°
Sun, 0162° / 46°0
62 °
Iron Lightning, Sunday, 1 November
Overcast. High 62°, low 46°.
Pressure29.94 inHg
Wind8.1 mph NW
Humidity41%
Visibility—
Dew point33°
Mon, 0259° / 45°0
59 °
Iron Lightning, Monday, 2 November
Clear. High 59°, low 45°.
Pressure30.21 inHg
Wind9.2 mph NW
Humidity27%
Visibility—
Dew point21°
Tue, 0366° / 45°0
66 °
Iron Lightning, Tuesday, 3 November
Clear. High 66°, low 45°.
Pressure29.83 inHg
Wind20.7 mph S
Humidity50%
Visibility—
Dew point40°
Wed, 0457° / 45°0
57 °
Iron Lightning, Wednesday, 4 November
Mostly clear. High 57°, low 45°.
Pressure29.85 inHg
Wind21.5 mph NW
Humidity36%
Visibility—
Dew point28°
Thu, 0562° / 42°0
62 °
Iron Lightning, Thursday, 5 November
Partly cloudy. High 62°, low 42°.
Pressure29.83 inHg
Wind10 mph SE
Humidity39%
Visibility—
Dew point28°
Fri, 0666° / 53°0
66 °
Iron Lightning, Friday, 6 November
Overcast. High 66°, low 53°.
Pressure29.68 inHg
Wind16.8 mph NW
Humidity28%
Visibility—
Dew point31°
Sat, 0762° / 48°0
62 °
Iron Lightning, Saturday, 7 November
Overcast. High 62°, low 48°.
Pressure29.83 inHg
Wind23.3 mph NW
Humidity46%
Visibility—
Dew point35°
Sun, 0864° / 44°0
64 °
Iron Lightning, Sunday, 8 November
Partly cloudy. High 64°, low 44°.
Pressure30.06 inHg
Wind15.7 mph NW
Humidity42%
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.