Weather in Johnston, IA
Updated 2026-08-11 10:30 local time · ZIP codes 50131
Patchy rain nearby
No government weather alerts were returned for this location at the latest update.
Next hours
77°31% rain
85°12% rain89°8% rain93°5% rain95°4% rain96°4% rain96°3% rain95°3% rain93°3% rain90°5% rain87°6% rain
84°6% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 12%).
It feels like 83°F with winds near 7 mph.
87°F, 6% rain chance and 8 mph wind.
Visibility is around 6 mi; gusts may reach 22 mph.
Current temperature is 77°F, wind 7 mph, rain chance up to 12%.
UV index is 3.
Johnston weather today
Patchy rain nearby and 77°F in Johnston, IA. Today's high is 96°F with a 17% rain chance. Winds are around 7 mph with gusts near 10 mph. Relative humidity is 87%, pressure is 29.83 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Johnston
Sunrise is at 06:19 AM and sunset is at 08:20 PM. Tomorrow's forecast calls for Sunny with a high near 91°F and a low near 68°F. The maximum rain chance is 57%.