Weather in Griswold, IA
Griswold, Sunday, 11 October, 04:05
Clear. Feels like 64°. High 87°, low 65°.
Monthly outlook for Griswold, IA: average high 66°, average low 48.4°. That is 2.4° above the climate normal for October. Precipitation is expected on 3 days (about 1.6 inches), against a normal of 4 days and 1.3 inches. The warmest day looks like 12 October (92.7°), the coolest 17 October (28.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 11 October – 20 October | 66.7° | 62.7° | +2.2° |
| 21 October – 30 October | 64.9° | 58.9° | +3.3° |
| 31 October – 9 November | at normal | 53.4° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Lewis (6 mi).
0
Griswold, Monday, 12 October
Clear. High 93°, low 68°.
0.04
Griswold, Tuesday, 13 October
Light rain. High 73°, low 59°.
0Griswold, Wednesday, 14 October
Light rain. High 64°, low 56°.
1.17Griswold, Thursday, 15 October
Heavy rain. High 65°, low 57°.
0
Griswold, Friday, 16 October
Overcast. High 57°, low 41°.
0Griswold, Saturday, 17 October
Clear. High 44°, low 29°.
0Griswold, Sunday, 18 October
Clear. High 53°, low 29°.
0
Griswold, Monday, 19 October
Mostly clear. High 64°, low 40°.
0Griswold, Tuesday, 20 October
Clear. High 67°, low 44°.
0Griswold, Wednesday, 21 October
Clear. High 72°, low 50°.
0Griswold, Thursday, 22 October
Clear. High 68°, low 52°.
0.37Griswold, Friday, 23 October
Rain. High 77°, low 56°.
0Griswold, Saturday, 24 October
Clear. High 58°, low 46°.
0Griswold, Sunday, 25 October
Clear. High 57°, low 40°.
0Griswold, Monday, 26 October
Clear. High 58°, low 44°.
0.06Griswold, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.07Griswold, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.09
Griswold, Thursday, 29 October
Climate normal for this date — 60-year average.
0.12Griswold, Friday, 30 October
Climate normal for this date — 60-year average.
0.11Griswold, Saturday, 31 October
Climate normal for this date — 60-year average.
0.16Griswold, Sunday, 1 November
Climate normal for this date — 60-year average.
0.08Griswold, Monday, 2 November
Climate normal for this date — 60-year average.
0.09Griswold, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.07Griswold, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.05Griswold, Thursday, 5 November
Climate normal for this date — 60-year average.
0.06Griswold, Friday, 6 November
Climate normal for this date — 60-year average.
0.02Griswold, Saturday, 7 November
Climate normal for this date — 60-year average.
0.04Griswold, Sunday, 8 November
Climate normal for this date — 60-year average.
0.13Griswold, Monday, 9 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 Griswold, 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 Griswold, 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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