Weather in Harlan, IA
Harlan, Wednesday, 21 October, 17:24
Clear. Feels like 75°. High 76°, low 52°.
Monthly outlook for Harlan, IA: average high 61.1°, average low 47.3°. That is 2.8° above the climate normal for October. Precipitation is expected on 6 days (about 2.1 inches), against a normal of 4 days and 1.4 inches. The warmest day looks like 21 October (76°), the coolest 29 October (35.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 21 October – 30 October | 64.2° | 58° | +3.5° |
| 31 October – 9 November | 55.9° | 52.3° | +2° |
| 10 November – 19 November | at normal | 47.3° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Kimballton (13 mi).
0Harlan, Thursday, 22 October
Clear. High 76°, low 52°.
0
Harlan, Friday, 23 October
Overcast. High 73°, low 55°.
0Harlan, Saturday, 24 October
Overcast. High 73°, low 60°.
0
Harlan, Sunday, 25 October
Partly cloudy. High 73°, low 54°.
0.17
Harlan, Monday, 26 October
Rain. High 63°, low 48°.
0.08Harlan, Tuesday, 27 October
Light rain. High 55°, low 45°.
0.05Harlan, Wednesday, 28 October
Light rain. High 46°, low 40°.
0Harlan, Thursday, 29 October
Overcast. High 49°, low 36°.
0Harlan, Friday, 30 October
Overcast. High 57°, low 39°.
0Harlan, Saturday, 31 October
Overcast. High 66°, low 49°.
0.3Harlan, Sunday, 1 November
Light rain. High 57°, low 54°.
1.05Harlan, Monday, 2 November
Rain. High 53°, low 52°.
0.4Harlan, Tuesday, 3 November
Rain. High 54°, low 45°.
0Harlan, Wednesday, 4 November
Clear. High 51°, low 38°.
0Harlan, Thursday, 5 November
Clear. High 55°, low 39°.
0.05
Harlan, Friday, 6 November
Climate normal for this date — 60-year average.
0.02Harlan, Saturday, 7 November
Climate normal for this date — 60-year average.
0.05Harlan, Sunday, 8 November
Climate normal for this date — 60-year average.
0.12Harlan, Monday, 9 November
Climate normal for this date — 60-year average.
0.08Harlan, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.07Harlan, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.07Harlan, Thursday, 12 November
Climate normal for this date — 60-year average.
0.07Harlan, Friday, 13 November
Climate normal for this date — 60-year average.
0.03Harlan, Saturday, 14 November
Climate normal for this date — 60-year average.
0.06Harlan, Sunday, 15 November
Climate normal for this date — 60-year average.
0.04Harlan, Monday, 16 November
Climate normal for this date — 60-year average.
0.07Harlan, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.06Harlan, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.07Harlan, Thursday, 19 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 Harlan, IA 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 Harlan, IA 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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