Waterloo weather in October: Waterloo, Iowa: normal highs, lows, rain and records for October
Waterloo in October has a normal high of 63°F and a normal low of 40°F, a daily mean of 52°F, falling from 71°F on the 1st to 55°F by the 31st. Measurable precipitation falls on 9 days in a normal October, 2.76 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 17°C and low of 5°C, 70 mm of precipitation and 1 cm of snow in October.
- NOAA stationWaterloo Municipal Airport
- Station IDUSW00094910
- Location42.55°N 92.40°W
- Elevation868 ft (265 m)
- Population67,477
- Jan 28° 11°
- Feb 33° 15°
- Mar 47° 27°
- Apr 61° 38°
- May 73° 50°
- Jun 82° 61°
- Jul 85° 64°
- Aug 83° 61°
- Sep 77° 52°
- Oct 63° 40°
- Nov 47° 28°
- Dec 34° 17°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Waterloo in October?
The normal high is 63°F and the normal low 40°F, for a daily mean of 51.6°F. October is 13.0°F cooler than September and 14.2°F warmer than November. October is the 6th warmest month of the year in Waterloo and the 7th wettest. Across the month the normal high falls 16°F, from 71°F on October 1 to 55°F on October 31. From one year to the next October's mean temperature typically moves about 2.8°F either way (NOAA's standard deviation), so roughly two Octobers in three average between 49°F and 54°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 29%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| October 1 | 71°F | 46°F | 29% | 17% |
| October 8 | 67°F | 43°F | 28% | 16% |
| October 15 | 64°F | 41°F | 27% | 15% |
| October 22 | 60°F | 38°F | 27% | 14% |
| October 31 | 55°F | 34°F | 26% | 13% |
Every day of October: normal high, low and chance of precipitation (warmest afternoon October 1, coldest night October 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| October 1 | 71°F | 46°F | 29% | 17% | 11 h 50 min |
| October 2 | 70°F | 46°F | 28% | 17% | 11 h 50 min |
| October 3 | 70°F | 45°F | 28% | 17% | 11 h 40 min |
| October 4 | 69°F | 45°F | 28% | 17% | 11 h 40 min |
| October 5 | 69°F | 45°F | 28% | 17% | 11 h 40 min |
| October 6 | 68°F | 44°F | 28% | 16% | 11 h 30 min |
| October 7 | 68°F | 44°F | 28% | 16% | 11 h 30 min |
| October 8 | 67°F | 43°F | 28% | 16% | 11 h 30 min |
| October 9 | 67°F | 43°F | 28% | 16% | 11 h 30 min |
| October 10 | 66°F | 43°F | 28% | 16% | 11 h 20 min |
| October 11 | 66°F | 42°F | 27% | 15% | 11 h 20 min |
| October 12 | 65°F | 42°F | 27% | 15% | 11 h 20 min |
| October 13 | 65°F | 41°F | 27% | 15% | 11 h 10 min |
| October 14 | 64°F | 41°F | 27% | 15% | 11 h 10 min |
| October 15 | 64°F | 41°F | 27% | 15% | 11 h 10 min |
| October 16 | 63°F | 40°F | 27% | 14% | 11 h 10 min |
| October 17 | 63°F | 40°F | 27% | 14% | 11 h |
| October 18 | 62°F | 39°F | 27% | 14% | 11 h |
| October 19 | 61°F | 39°F | 27% | 14% | 11 h |
| October 20 | 61°F | 39°F | 27% | 14% | 10 h 50 min |
| October 21 | 60°F | 38°F | 27% | 14% | 10 h 50 min |
| October 22 | 60°F | 38°F | 27% | 14% | 10 h 50 min |
| October 23 | 59°F | 37°F | 27% | 14% | 10 h 50 min |
| October 24 | 59°F | 37°F | 27% | 14% | 10 h 40 min |
| October 25 | 58°F | 37°F | 27% | 13% | 10 h 40 min |
| October 26 | 58°F | 36°F | 26% | 13% | 10 h 40 min |
| October 27 | 57°F | 36°F | 26% | 13% | 10 h 40 min |
| October 28 | 57°F | 35°F | 26% | 13% | 10 h 30 min |
| October 29 | 56°F | 35°F | 26% | 13% | 10 h 30 min |
| October 30 | 56°F | 35°F | 26% | 13% | 10 h 30 min |
| October 31 | 55°F | 34°F | 26% | 13% | 10 h 20 min |
- Normal high
- 63°FOctober average
- Normal low
- 40°FOctober average
- Precipitation
- 2.76 inmonth total
- Days with precipitation
- 90.01 inch or more
- Snowfall
- 0.3 inmonth total
- Nights at 32°F or colder
- 9
- Daylight
- 11 h 50 min to 10 h 20 minOctober 1 to October 31
- Days at 70°F or more
- 8
- Days at 80°F or more
- 2
- Sunshine
- 71%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094910; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Waterloo in October?
On a given October day the chance of 0.01 inch or more is 27% on average, highest around October 1 (29%). In all, 2.76 in falls on 9 days of a normal October, 1 of them with an inch or more.
In a normal October in Waterloo, 9 nights fall to freezing and snowfall averages 0.3 inches.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094910.
How humid and windy is Waterloo in October?
At 3 p.m. the normal temperature is 52°F with 51% relative humidity and a dew point of 34°F; at 6 a.m. it is 37°F with 83% humidity. The wind averages 10.0 mph, most often from the west in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 37°F | 33°F | 83% | 8.2 mph | 52% |
| 9 a.m. | 42°F | 35°F | 75% | 10.6 mph | 56% |
| noon | 50°F | 35°F | 57% | 13.1 mph | 52% |
| 3 p.m. | 52°F | 34°F | 51% | 13.3 mph | 56% |
| 6 p.m. | 46°F | 34°F | 64% | 9.3 mph | 54% |
| 9 p.m. | 42°F | 34°F | 72% | 9.1 mph | 60% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00094910. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for October in Waterloo?
The warmest October temperature on Waterloo's official record (since 1895) is 95°F, on October 12, 1930; the coldest is 0°F, on October 30, 1925. The wettest October brought 5.86 in (2009); the snowiest, 6.0 inches (1898).
The October mean against the 1991-2020 normal of 51.6°F: 2021 56.2°F (+4.6), 2022 50.6°F (−1.0), 2023 54.1°F (+2.5), 2024 57.5°F (+5.9), 2025 56.2°F (+4.6). 4 of 5 ran warmer than normal.
| October | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 56.2°F | +4.6°F | 3.72 in |
| 2022 | 50.6°F | −1.0°F | 1.39 in |
| 2023 | 54.1°F | +2.5°F | 3.38 in |
| 2024 | 57.5°F | +5.9°F | 1.69 in |
| 2025 | 56.2°F | +4.6°F | 1.35 in |
Source: records: ACIS, NWS threaded record ALOthr; recent months: ACIS, station USW00094910. Records and recent months use complete months only.
How does October in Waterloo compare across Iowa?
Across the 132 places PlainClimate covers in Iowa, October normal highs run from 57°F in Northwood to 67°F in Glenwood; Waterloo's is 63°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.