Weather in Iron Lightning, SD
Iron Lightning, Tuesday, 20 October, 08:47
Clear. Feels like 39°. High 70°, low 42°.
Monthly outlook for Iron Lightning, SD: average high 59.1°, average low 39.7°. That is 2.9° above the climate normal for October. Precipitation is expected on 2 days (about 0.3 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 23 October (79.2°), the coolest 27 October (22.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 20 October – 29 October | 58.1° | 56° | +1.2° |
| 30 October – 8 November | 60.9° | 49.5° | +6.3° |
| 9 November – 18 November | at normal | 43.2° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Thunder Butte (9 mi).
0
Iron Lightning, Wednesday, 21 October
Overcast. High 67°, low 44°.
0
Iron Lightning, Thursday, 22 October
Mostly clear. High 75°, low 51°.
0
Iron Lightning, Friday, 23 October
Partly cloudy. High 79°, low 59°.
0Iron Lightning, Saturday, 24 October
Clear. High 56°, low 41°.
0.27
Iron Lightning, Sunday, 25 October
Snow. High 46°, low 35°.
0.05Iron Lightning, Monday, 26 October
Light snow. High 42°, low 33°.
0Iron Lightning, Tuesday, 27 October
Mostly clear. High 42°, low 23°.
0Iron Lightning, Wednesday, 28 October
Clear. High 53°, low 32°.
0Iron Lightning, Thursday, 29 October
Clear. High 51°, low 31°.
0Iron Lightning, Friday, 30 October
Mostly clear. High 57°, low 30°.
0Iron Lightning, Saturday, 31 October
Mostly clear. High 54°, low 41°.
0Iron Lightning, Sunday, 1 November
Clear. High 55°, low 33°.
0Iron Lightning, Monday, 2 November
Overcast. High 68°, low 45°.
0Iron Lightning, Tuesday, 3 November
Overcast. High 68°, low 50°.
0Iron Lightning, Wednesday, 4 November
Clear. High 63°, low 45°.
0.04Iron Lightning, Thursday, 5 November
Climate normal for this date — 60-year average.
0.02Iron Lightning, Friday, 6 November
Climate normal for this date — 60-year average.
0.04Iron Lightning, Saturday, 7 November
Climate normal for this date — 60-year average.
0.04Iron Lightning, Sunday, 8 November
Climate normal for this date — 60-year average.
0.04Iron Lightning, Monday, 9 November
Climate normal for this date — 60-year average.
0.06Iron Lightning, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.01Iron Lightning, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.02Iron Lightning, Thursday, 12 November
Climate normal for this date — 60-year average.
0.02Iron Lightning, Friday, 13 November
Climate normal for this date — 60-year average.
0.02Iron Lightning, Saturday, 14 November
Climate normal for this date — 60-year average.
0.02Iron Lightning, Sunday, 15 November
Climate normal for this date — 60-year average.
0.02Iron Lightning, Monday, 16 November
Climate normal for this date — 60-year average.
0.02Iron Lightning, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.03Iron Lightning, Wednesday, 18 November
Climate normal for this date — 60-year average.
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.
Sun and moon today
Weather history
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