Weather in Waterloo, IA
Waterloo, Wednesday, 7 October, 18:09
Overcast. Feels like 72°. High 76°, low 54°.
Monthly outlook for Waterloo, IA: average high 66.7°, average low 50.3°. That is 3.2° above the climate normal for October. Precipitation is expected on 4 days (about 0.7 inches), against a normal of 4 days and 1.4 inches. The warmest day looks like 10 October (80.7°), the coolest 18 October (38.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 7 October – 16 October | 72.5° | 62.3° | +5.7° |
| 17 October – 26 October | 57.2° | 58.1° | -0.5° |
| 27 October – 5 November | at normal | 53.3° | — |
October records over 66 years
0
Waterloo, Thursday, 8 October
Mostly clear. High 73°, low 49°.
0.13
Waterloo, Friday, 9 October
Rain. High 76°, low 50°.
0
Waterloo, Saturday, 10 October
Clear. High 81°, low 64°.
0Waterloo, Sunday, 11 October
Clear. High 76°, low 58°.
0Waterloo, Monday, 12 October
Mostly clear. High 79°, low 60°.
0
Waterloo, Tuesday, 13 October
Partly cloudy. High 60°, low 52°.
0.3Waterloo, Wednesday, 14 October
Light rain. High 69°, low 53°.
0.04Waterloo, Thursday, 15 October
Light rain. High 79°, low 54°.
0Waterloo, Friday, 16 October
Clear. High 57°, low 44°.
0Waterloo, Saturday, 17 October
Clear. High 53°, low 39°.
0Waterloo, Sunday, 18 October
Mostly clear. High 56°, low 39°.
0.24Waterloo, Monday, 19 October
Rain. High 51°, low 44°.
0Waterloo, Tuesday, 20 October
Light rain. High 67°, low 49°.
0Waterloo, Wednesday, 21 October
Overcast. High 61°, low 48°.
0Waterloo, Thursday, 22 October
Overcast. High 56°, low 49°.
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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