Monthly outlook for Iron Lightning, SD: average high 58.7°, average low 42°. That is 6.6° above the climate normal for October. Precipitation is expected on 2 days (about 1.1 inches), against a normal of 2 days and 0.4 inches. The warmest day looks like 12 November (68.8°), the coolest 4 November (32.5°).
58.7°/42°
Average high / low
+6.6°
Above normal
2 / 2
Wet days / normal
1.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
31 October – 9 November
58.4°
48.9°
+5.3°
10 November – 19 November
59.1°
43°
+9°
20 November – 29 November
at normal
37.4°
—
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, 0164° / 46°0.11
64 °
Iron Lightning, Sunday, 1 November
Rain. High 64°, low 46°.
Pressure29.91 inHg
Wind6.5 mph SE
Humidity72%
Visibility6.2 mi
Dew point51°
Mon, 0256° / 47°1.01
56 °
Iron Lightning, Monday, 2 November
Heavy rain. High 56°, low 47°.
Pressure29.65 inHg
Wind10.5 mph N
Humidity94%
Visibility2.1 mi
Dew point54°
Tue, 0353° / 37°0
53 °
Iron Lightning, Tuesday, 3 November
Clear. High 53°, low 37°.
Pressure30.15 inHg
Wind14.7 mph NW
Humidity49%
Visibility6.2 mi
Dew point28°
Wed, 0456° / 33°0
56 °
Iron Lightning, Wednesday, 4 November
Clear. High 56°, low 33°.
Pressure30.00 inHg
Wind4.3 mph N
Humidity46%
Visibility—
Dew point29°
Thu, 0552° / 34°0
52 °
Iron Lightning, Thursday, 5 November
Overcast. High 52°, low 34°.
Pressure30.09 inHg
Wind4.7 mph E
Humidity55%
Visibility—
Dew point31°
Fri, 0660° / 39°0
60 °
Iron Lightning, Friday, 6 November
Clear. High 60°, low 39°.
Pressure29.83 inHg
Wind12.2 mph SE
Humidity40%
Visibility—
Dew point32°
Sat, 0751° / 41°0
51 °
Iron Lightning, Saturday, 7 November
Overcast. High 51°, low 41°.
Pressure30.00 inHg
Wind18.6 mph NW
Humidity52%
Visibility—
Dew point32°
Sun, 0859° / 39°0
59 °
Iron Lightning, Sunday, 8 November
Partly cloudy. High 59°, low 39°.
Pressure30.09 inHg
Wind12.2 mph S
Humidity33%
Visibility—
Dew point24°
Mon, 0968° / 49°0
68 °
Iron Lightning, Monday, 9 November
Mostly clear. High 68°, low 49°.
Pressure29.97 inHg
Wind7.1 mph SE
Humidity25%
Visibility—
Dew point26°
Tue, 1059° / 43°0
59 °
Iron Lightning, Tuesday, 10 November
Overcast. High 59°, low 43°.
Pressure30.09 inHg
Wind21.1 mph NW
Humidity49%
Visibility—
Dew point37°
Wed, 1155° / 39°0
55 °
Iron Lightning, Wednesday, 11 November
Clear. High 55°, low 39°.
Pressure30.21 inHg
Wind16.6 mph SE
Humidity56%
Visibility—
Dew point34°
Thu, 1269° / 43°0
69 °
Iron Lightning, Thursday, 12 November
Mostly clear. High 69°, low 43°.
Pressure29.83 inHg
Wind9.4 mph S
Humidity26%
Visibility—
Dew point26°
Fri, 1365° / 47°0
65 °
Iron Lightning, Friday, 13 November
Overcast. High 65°, low 47°.
Pressure29.94 inHg
Wind23.4 mph NW
Humidity21%
Visibility—
Dew point23°
Sat, 1454° / 44°0
54 °
Iron Lightning, Saturday, 14 November
Overcast. High 54°, low 44°.
Pressure30.18 inHg
Wind12.9 mph SE
Humidity46%
Visibility—
Dew point31°
Sun, 1554° / 44°0
54 °
Iron Lightning, Sunday, 15 November
Overcast. High 54°, low 44°.
Pressure29.97 inHg
Wind16.3 mph SE
Humidity50%
Visibility—
Dew point32°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Tue, 2439° / 22°0.01
39 °
Iron Lightning, Tuesday, 24 November
Climate normal for this date — 60-year average.
Average high39°
Average low22°
Average precipitation0.01 in
Chance of precipitation8%
Record high64° (1990)
Record low-15° (1985)
Wed, 2537° / 22°0.04
37 °
Iron Lightning, Wednesday, 25 November
Climate normal for this date — 60-year average.
Average high37°
Average low22°
Average precipitation0.04 in
Chance of precipitation17%
Record high67° (1960)
Record low-5° (2010)
Thu, 2635° / 21°0.03
35 °
Iron Lightning, Thursday, 26 November
Climate normal for this date — 60-year average.
Average high35°
Average low21°
Average precipitation0.03 in
Chance of precipitation20%
Record high61° (1998)
Record low-14° (1985)
Fri, 2734° / 20°0.03
34 °
Iron Lightning, Friday, 27 November
Climate normal for this date — 60-year average.
Average high34°
Average low20°
Average precipitation0.03 in
Chance of precipitation18%
Record high69° (2017)
Record low-17° (1985)
Sat, 2835° / 20°0.02
35 °
Iron Lightning, Saturday, 28 November
Climate normal for this date — 60-year average.
Average high35°
Average low20°
Average precipitation0.02 in
Chance of precipitation10%
Record high57° (2002)
Record low-10° (1985)
Sun, 2935° / 20°0.02
35 °
Iron Lightning, Sunday, 29 November
Climate normal for this date — 60-year average.
Average high35°
Average low20°
Average precipitation0.02 in
Chance of precipitation8%
Record high57° (2021)
Record low-11° (1964)
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.