Johnston, IA Weather Forecast
Local 7-day forecast
Showers And Thunderstorms Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Johnston, IA in one place.
A slight chance of rain showers before 7am, then showers and thunderstorms likely. Cloudy, with a high near 65. Southeast wind 7 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
Local Weather Overview
This forecast page for Johnston, IA is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Apr 9, 2026 2:46 PM CDT.
The active forecast window currently covers Apr 11 to Apr 15, 2026 for Johnston, IA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 11 to Apr 15, 2026
- Latest sync
- Apr 9, 2026 2:46 PM CDT
- Forecast office
- DMX
- Source
- NOAA / NWS
Daily Outlook
This Week in Johnston
Monday looks like the warmest upcoming period in Johnston at 82 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 44 degrees F.
The strongest winds are forecast for Monday at about 12 to 22 mph SSW.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 9, 2026 2:46 PM CDT
- Coverage
- 5 days
- Time zone
- America/Chicago
- Forecast office
- DMX
- Radar station
- KDMX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Showers and thunderstorms likely before 7pm, then a chance of showers and thunderstorms between 7pm and 10pm, then a chance of showers and thunderstorms. Cloudy, with a low around 60. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
A chance of rain showers before 7am, then showers and thunderstorms. Mostly cloudy, with a high near 73. Chance of precipitation is 80%.
Showers and thunderstorms before 1am, then a slight chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 80%.
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 82.
A chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 60. Chance of precipitation is 50%.
Showers and thunderstorms likely. Partly sunny, with a high near 76. Chance of precipitation is 60%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 47. Chance of precipitation is 60%.
A chance of rain showers. Partly sunny, with a high near 64. Chance of precipitation is 40%.
A chance of rain showers before 1am. Partly cloudy, with a low around 44.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Apr 11
|
Showers And Thunderstorms Likely
|
65°F |
7 to 14 mph
SE
|
|
Saturday Night
Apr 11
|
Showers And Thunderstorms Likely
|
60°F |
15 mph
S
|
|
Sunday
Apr 12
|
Showers And Thunderstorms
|
73°F |
16 to 21 mph
SSW
|
|
Sunday Night
Apr 12
|
Showers And Thunderstorms
|
63°F |
13 to 18 mph
SSW
|
|
Monday
Apr 13
|
Slight Chance Showers And Thunderstorms
|
82°F |
12 to 22 mph
SSW
|
|
Monday Night
Apr 13
|
Chance Showers And Thunderstorms
|
60°F |
12 to 18 mph
SSW
|
|
Tuesday
Apr 14
|
Showers And Thunderstorms Likely
|
76°F |
9 to 15 mph
SW
|
|
Tuesday Night
Apr 14
|
Showers And Thunderstorms Likely
|
47°F |
14 mph
WSW
|
|
Wednesday
Apr 15
|
Chance Rain Showers
|
64°F |
12 mph
WSW
|
|
Wednesday Night
Apr 15
|
Chance Rain Showers
|
44°F |
6 to 10 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Johnston.
