Weather in Grimes, IA
Grimes, Friday, 9 October, 22:17
Clear. Feels like 69°. High 83°, low 59°.
Monthly outlook for Grimes, IA: average high 66.5°, average low 51.4°. That is 2.5° above the climate normal for October. Precipitation is expected on 4 days (about 0.7 inches), against a normal of 4 days and 1.5 inches. The warmest day looks like 10 October (84.6°), the coolest 18 October (31.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 October – 18 October | 69.9° | 62.9° | +3.9° |
| 19 October – 28 October | 60.8° | 59.2° | +0.9° |
| 29 October – 7 November | at normal | 54° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Urbandale (3 mi).
0
Grimes, Saturday, 10 October
Clear. High 85°, low 66°.
0Grimes, Sunday, 11 October
Clear. High 84°, low 62°.
0Grimes, Monday, 12 October
Clear. High 84°, low 69°.
0
Grimes, Tuesday, 13 October
Light rain. High 72°, low 61°.
0
Grimes, Wednesday, 14 October
Overcast. High 67°, low 59°.
0.04Grimes, Thursday, 15 October
Light rain. High 67°, low 53°.
0
Grimes, Friday, 16 October
Partly cloudy. High 56°, low 43°.
0Grimes, Saturday, 17 October
Overcast. High 46°, low 37°.
0
Grimes, Sunday, 18 October
Mostly clear. High 56°, low 32°.
0Grimes, Monday, 19 October
Mostly clear. High 62°, low 41°.
0Grimes, Tuesday, 20 October
Overcast. High 63°, low 51°.
0.11Grimes, Wednesday, 21 October
Light rain. High 59°, low 52°.
0.34Grimes, Thursday, 22 October
Rain. High 62°, low 49°.
0Grimes, Friday, 23 October
Partly cloudy. High 64°, low 45°.
0Grimes, Saturday, 24 October
Mostly clear. High 55°, low 44°.
0.06Grimes, Sunday, 25 October
Climate normal for this date — 60-year average.
0.08Grimes, Monday, 26 October
Climate normal for this date — 60-year average.
0.08Grimes, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.07Grimes, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.09Grimes, Thursday, 29 October
Climate normal for this date — 60-year average.
0.09
Grimes, Friday, 30 October
Climate normal for this date — 60-year average.
0.1Grimes, Saturday, 31 October
Climate normal for this date — 60-year average.
0.19Grimes, Sunday, 1 November
Climate normal for this date — 60-year average.
0.08Grimes, Monday, 2 November
Climate normal for this date — 60-year average.
0.07Grimes, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.09Grimes, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.06Grimes, Thursday, 5 November
Climate normal for this date — 60-year average.
0.07Grimes, Friday, 6 November
Climate normal for this date — 60-year average.
0.02Grimes, Saturday, 7 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 Grimes, 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 Grimes, 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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