Idaho · NWS BOI office

Caldwell, ID weather

It is 36°F and mostly clear at Caldwell - Caldwell Industrial Airport as of Oct 28, 2:56 AM MDT. Overnight: Patchy Fog, low near 32°F. Forecast from the National Weather Service, issued Oct 28, 12:30 AM MDT.

Updated Oct 28, 3:18 AM MDT (snapshot)

Current conditions

Temperature

36°F

Mostly Clear · feels like 32°F

Wind

NE 5 mph

Humidity 92% · dew point 34°F

Pressure · visibility

30.04 inHg

Visibility 10 mi

Observed at Caldwell - Caldwell Industrial Airport (KEUL), Oct 28, 2:56 AM MDT. Station readings can lag or be missing.

Alerts for this area

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

Around the NWS BOI forecast area

No active alerts in zones served by the BOI office near Caldwell.

From the alert snapshot of Oct 28, 2026, 5:12 AM EDT. No alerts are active anywhere in Idaho.

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 Caldwell (local time)
TimeTempForecastPrecip. chanceWind
Wed 5 AM33°FPatchy Frost0%ESE 2 mph
Wed 6 AM32°FAreas Of Frost0%SE 3 mph
Wed 7 AM32°FAreas Of Frost0%SE 3 mph
Wed 8 AM32°FAreas Of Frost0%SE 3 mph
Wed 9 AM33°FPatchy Frost0%SE 5 mph
Wed 10 AM39°FMostly Sunny0%SE 5 mph
Wed 11 AM44°FMostly Sunny0%SE 5 mph
Wed 12 PM50°FMostly Sunny0%SSE 5 mph
Wed 1 PM53°FMostly Sunny0%SSE 5 mph
Wed 2 PM55°FSunny0%SSE 5 mph
Wed 3 PM57°FSunny0%SSE 3 mph
Wed 4 PM57°FSunny0%SSE 2 mph
Wed 5 PM57°FSunny0%SSE 2 mph
Wed 6 PM55°FMostly Clear0%ESE 2 mph
Wed 7 PM50°FMostly Clear0%E 1 mph
Wed 8 PM47°FClear1%E 1 mph
Wed 9 PM42°FClear1%E 2 mph
Wed 10 PM39°FClear1%ESE 2 mph
Wed 11 PM37°FPatchy Frost1%SE 2 mph
Thu 12 AM35°FPatchy Frost1%ESE 2 mph
Thu 1 AM34°FAreas Of Frost1%ESE 2 mph
Thu 2 AM33°FWidespread Frost1%ESE 1 mph
Thu 3 AM32°FWidespread Frost1%ESE 2 mph
Thu 4 AM31°FWidespread Frost0%SE 2 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 Caldwell can differ.

7-day forecast

Overnight

Low 32°F

Patchy fog before 4am, then patchy frost and patchy fog. Mostly clear, with a low around 32. East southeast wind around 2 mph.

Wednesday

High 57°F·Low 27°F

Areas of frost and patchy fog before 10am. Sunny, with a high near 57. Southeast wind around 5 mph.

Wednesday Night: Patchy frost between 11pm and midnight, then widespread frost and areas of fog. Mostly clear, with a low around 27. East southeast wind around 2 mph.

Thursday

High 58°F·Low 33°F

Widespread frost and areas of fog before 11am. Mostly sunny, with a high near 58. South southeast wind around 3 mph.

Thursday Night: Mostly cloudy, with a low around 33. North northwest wind 0 to 3 mph.

Friday

High 61°F·Low 32°F

Mostly cloudy, with a high near 61.

Friday Night: Areas of fog after midnight. Partly cloudy, with a low around 32.

Saturday

High 57°F·Low 37°F

Areas of fog before 10am, then a slight chance of rain showers. Mostly cloudy, with a high near 57. Chance of precipitation is 20%.

Saturday Night: Rain showers likely. Mostly cloudy, with a low around 37. Chance of precipitation is 60%.

Sunday

High 55°F·Low 29°F

A chance of rain showers before 5pm. Partly sunny, with a high near 55. Chance of precipitation is 40%.

Sunday Night: Mostly clear, with a low around 29.

Monday

High 56°F·Low 30°F

Sunny, with a high near 56.

Monday Night: Areas of fog after 1am. Partly cloudy, with a low around 30.

Tuesday

High 58°F

Areas of fog before 9am. Partly sunny, with a high near 58.

Nearby cities

Larger cities in the area

Other cities in Canyon County

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

About this forecast

Forecast office
Caldwell is served by the National Weather Service BOI forecast office, forecast zone IDZ012, county zone IDC027.
Location used
The Census Bureau's internal point for Caldwell (43.6459, -116.6593), in Canyon County. Population: 73,088 (2024 estimate), number 4 of the 15 Idaho cities on this site.
Radar
Nearest NWS radar: KCBX. 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/43.6459,-116.6593 (forecast issued Oct 28, 12:30 AM MDT).
  • 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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