Iowa · NWS DMX office

Waterloo, IA weather

It is 54°F and clear at Waterloo, Waterloo Municipal Airport as of Oct 28, 1:15 AM CDT. Overnight: Partly Cloudy, low near 50°F, 1% chance of precipitation. Forecast from the National Weather Service, issued Oct 27, 11:11 PM CDT.

Updated Oct 28, 1:21 AM CDT (snapshot)

Current conditions

Temperature

54°F

Clear

Wind

SE 6 mph

Humidity 88% · dew point 50°F

Pressure · visibility

30.11 inHg

Visibility 10 mi

Observed at Waterloo, Waterloo Municipal Airport (KALO), Oct 28, 1:15 AM CDT. Station readings can lag or be missing.

Alerts for this area

No active NWS alerts cover the Waterloo forecast zone right now.

Around the NWS DMX forecast area

No active alerts in zones served by the DMX office near Waterloo.

From the alert snapshot of Oct 28, 2026, 2:15 AM EDT. No alerts are active anywhere in Iowa.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for Waterloo (local time)
TimeTempForecastPrecip. chanceWind
Wed 1 AM55°FPartly Cloudy0%S 5 mph
Wed 2 AM54°FPartly Cloudy0%S 5 mph
Wed 3 AM53°FPartly Cloudy0%SSE 5 mph
Wed 4 AM51°FPartly Cloudy1%SSE 5 mph
Wed 5 AM50°FPartly Cloudy1%SSE 5 mph
Wed 6 AM51°FPartly Sunny1%SSE 6 mph
Wed 7 AM52°FPartly Sunny3%SSE 6 mph
Wed 8 AM53°FPartly Sunny7%SSE 7 mph
Wed 9 AM56°FPartly Sunny4%SSE 8 mph
Wed 10 AM60°FMostly Sunny6%SSE 9 mph
Wed 11 AM64°FSunny6%SSE 10 mph
Wed 12 PM68°FMostly Sunny9%S 12 mph
Wed 1 PM70°FMostly Sunny5%S 13 mph
Wed 2 PM73°FMostly Sunny3%S 15 mph
Wed 3 PM73°FMostly Sunny7%S 16 mph
Wed 4 PM73°FMostly Sunny5%S 16 mph
Wed 5 PM74°FMostly Sunny7%S 15 mph
Wed 6 PM72°FSlight Chance Showers And Thunderstorms15%S 15 mph
Wed 7 PM70°FChance Showers And Thunderstorms41%S 14 mph
Wed 8 PM69°FChance Showers And Thunderstorms32%S 14 mph
Wed 9 PM66°FChance Showers And Thunderstorms34%S 14 mph
Wed 10 PM66°FShowers And Thunderstorms Likely56%SSW 13 mph
Wed 11 PM65°FShowers And Thunderstorms Likely62%SSW 12 mph
Thu 12 AM64°FChance Showers And Thunderstorms49%SW 10 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in Waterloo can differ.

7-day forecast

Overnight

Low 50°F

Partly cloudy, with a low around 50. South wind around 5 mph.

Wednesday

High 75°F·Low 54°F

Mostly sunny, with a high near 75. South southeast wind 6 to 16 mph, with gusts as high as 25 mph.

Wednesday Night: A chance of showers and thunderstorms before 10pm, then showers and thunderstorms likely between 10pm and midnight, then a chance of showers and thunderstorms between midnight and 2am. Mostly cloudy. Low around 54, with temperatures rising to around 58 overnight. Southwest wind 7 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.

Thursday

High 67°F·Low 43°F

Sunny. High near 67, with temperatures falling to around 65 in the afternoon. North wind 5 to 9 mph. New rainfall amounts less than a tenth of an inch possible.

Thursday Night: Mostly clear, with a low around 43. Northeast wind around 5 mph.

Friday

High 62°F·Low 48°F

A chance of rain showers between 7am and 1pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 62. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.

Friday Night: Showers and thunderstorms likely. Mostly cloudy, with a low around 48. Chance of precipitation is 70%.

Saturday

High 61°F·Low 51°F

Showers and thunderstorms likely. Cloudy, with a high near 61. Chance of precipitation is 60%.

Saturday Night: A chance of rain showers. Mostly cloudy, with a low around 51. Chance of precipitation is 50%.

Sunday

High 64°F·Low 52°F

A chance of rain showers. Mostly cloudy, with a high near 64. Chance of precipitation is 30%.

Sunday Night: A chance of rain showers. Mostly cloudy, with a low around 52. Chance of precipitation is 30%.

Monday

High 65°F·Low 49°F

Rain showers likely. Cloudy, with a high near 65. Chance of precipitation is 60%.

Monday Night: Rain showers likely. Mostly cloudy, with a low around 49. Chance of precipitation is 60%.

Tuesday

High 61°F

Rain showers likely. Mostly cloudy, with a high near 61.

Nearby cities

Larger cities in the area

Other cities in Black Hawk County

See every city we cover in Iowa, or check all active alerts.

About this forecast

Forecast office
Waterloo is served by the National Weather Service DMX forecast office, forecast zone IAZ039, county zone IAC013.
Location used
The Census Bureau's internal point for Waterloo (42.4923, -92.3519), in Black Hawk County. Population: 67,477 (2024 estimate), number 9 of the 27 Iowa cities on this site.
Radar
Nearest NWS radar: KDMX. View it on radar.weather.gov.

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Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/42.4923,-92.3519 (forecast issued Oct 27, 11:11 PM CDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

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