Weather in Waterloo, IA
Waterloo, Wednesday, 7 October, 21:03
Mostly clear. Feels like 57°. High 77°, low 54°.
Monthly outlook for Waterloo, IA: average high 66.9°, average low 49.5°. That is 3.2° above the climate normal for October. Precipitation is expected on 5 days (about 1.3 inches), against a normal of 4 days and 1.4 inches. The warmest day looks like 10 October (81.3°), the coolest 21 October (36°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 7 October – 16 October | 73.3° | 62.3° | +6.1° |
| 17 October – 26 October | 56.2° | 58.1° | -1° |
| 27 October – 5 November | at normal | 53.3° | — |
October records over 66 years
0
Waterloo, Thursday, 8 October
Partly cloudy. High 73°, low 51°.
0.06
Waterloo, Friday, 9 October
Light rain. High 76°, low 52°.
0
Waterloo, Saturday, 10 October
Clear. High 81°, low 62°.
0Waterloo, Sunday, 11 October
Clear. High 77°, low 60°.
0
Waterloo, Monday, 12 October
Mostly clear. High 80°, low 59°.
0Waterloo, Tuesday, 13 October
Mostly clear. High 57°, low 47°.
0.22Waterloo, Wednesday, 14 October
Rain. High 58°, low 44°.
0.76Waterloo, Thursday, 15 October
Rain. High 81°, low 64°.
0.09Waterloo, Friday, 16 October
Light rain. High 71°, low 46°.
0
Waterloo, Saturday, 17 October
Overcast. High 46°, low 43°.
0Waterloo, Sunday, 18 October
Mostly clear. High 55°, low 44°.
0Waterloo, Monday, 19 October
Clear. High 63°, low 43°.
0Waterloo, Tuesday, 20 October
Overcast. High 55°, low 43°.
0Waterloo, Wednesday, 21 October
Clear. High 54°, low 36°.
0.16Waterloo, Thursday, 22 October
Light rain. High 64°, low 46°.
0.11
Waterloo, Friday, 23 October
Climate normal for this date — 60-year average.
0.11Waterloo, Saturday, 24 October
Climate normal for this date — 60-year average.
0.06Waterloo, Sunday, 25 October
Climate normal for this date — 60-year average.
0.08Waterloo, Monday, 26 October
Climate normal for this date — 60-year average.
0.08Waterloo, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.07Waterloo, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.09Waterloo, Thursday, 29 October
Climate normal for this date — 60-year average.
0.07Waterloo, Friday, 30 October
Climate normal for this date — 60-year average.
0.11Waterloo, Saturday, 31 October
Climate normal for this date — 60-year average.
0.18Waterloo, Sunday, 1 November
Climate normal for this date — 60-year average.
0.08Waterloo, Monday, 2 November
Climate normal for this date — 60-year average.
0.05Waterloo, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.09Waterloo, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.07Waterloo, Thursday, 5 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 Waterloo, 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 Waterloo, 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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