Weather in Iron Lightning, SD
Iron Lightning, Sunday, 18 October, 14:06
Clear. Feels like 65°. High 68°, low 42°.
Monthly outlook for Iron Lightning, SD: average high 56.7°, average low 40.2°. That is 1° above the climate normal for October. Precipitation is expected on 3 days (about 1.3 inches), against a normal of 2 days and 0.6 inches. The warmest day looks like 23 October (77.5°), the coolest 1 November (20.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 18 October – 27 October | 65° | 57.2° | +4.4° |
| 28 October – 6 November | 42.8° | 50.6° | -4.3° |
| 7 November – 16 November | at normal | 44.3° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Thunder Butte (9 mi).
0Iron Lightning, Monday, 19 October
Clear. High 63°, low 36°.
0Iron Lightning, Tuesday, 20 October
Clear. High 70°, low 45°.
0Iron Lightning, Wednesday, 21 October
Clear. High 67°, low 48°.
0
Iron Lightning, Thursday, 22 October
Overcast. High 73°, low 51°.
0.02
Iron Lightning, Friday, 23 October
Light rain. High 78°, low 59°.
0Iron Lightning, Saturday, 24 October
Light rain. High 53°, low 42°.
0Iron Lightning, Sunday, 25 October
Clear. High 64°, low 38°.
0Iron Lightning, Monday, 26 October
Clear. High 60°, low 44°.
0.35Iron Lightning, Tuesday, 27 October
Rain. High 55°, low 48°.
0
Iron Lightning, Wednesday, 28 October
Mostly clear. High 56°, low 47°.
0
Iron Lightning, Thursday, 29 October
Partly cloudy. High 52°, low 40°.
0.78
Iron Lightning, Friday, 30 October
Snow. High 43°, low 31°.
0.11Iron Lightning, Saturday, 31 October
Snow. High 32°, low 24°.
0Iron Lightning, Sunday, 1 November
Partly cloudy. High 36°, low 20°.
0Iron Lightning, Monday, 2 November
Overcast. High 38°, low 28°.
0.02Iron Lightning, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.01Iron Lightning, Wednesday, 4 November
Climate normal for this date — 60-year average.
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.
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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