Johnston, SC Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Johnston, SC in one place.
A chance of rain showers before 11am, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 85. South wind 0 to 5 mph. Chance of precipitation is 40%.
Local Weather Overview
This forecast page for Johnston, SC 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: Jun 8, 2026 4:20 PM EDT.
The active forecast window currently covers Jun 9 to Jun 14, 2026 for Johnston, SC.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jun 9 to Jun 14, 2026
- Latest sync
- Jun 8, 2026 4:20 PM EDT
- Forecast office
- CAE
- Source
- NOAA / NWS
Daily Outlook
This Week in Johnston
Friday looks like the warmest upcoming period in Johnston at 96 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 69 degrees F.
The strongest winds are forecast for Friday at about 8 mph W.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Jun 8, 2026 4:20 PM EDT
- Coverage
- 6 days
- Time zone
- America/New_York
- Forecast office
- CAE
- Radar station
- KCAE
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 69. Southwest wind 1 to 5 mph. Chance of precipitation is 20%.
Mostly sunny, with a high near 91. Southwest wind around 6 mph.
Mostly clear, with a low around 72.
Sunny, with a high near 94.
Mostly clear, with a low around 74.
Sunny, with a high near 96.
Partly cloudy, with a low around 75.
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 95. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 72. Chance of precipitation is 40%.
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 93. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 72.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Jun 9
|
Chance Showers And Thunderstorms
|
85°F |
0 to 5 mph
S
|
|
Tuesday Night
Jun 9
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
69°F |
1 to 5 mph
SW
|
|
Wednesday
Jun 10
|
Mostly Sunny
|
91°F |
6 mph
SW
|
|
Wednesday Night
Jun 10
|
Mostly Clear
|
72°F |
5 mph
SW
|
|
Thursday
Jun 11
|
Sunny
|
94°F |
7 mph
SW
|
|
Thursday Night
Jun 11
|
Mostly Clear
|
74°F |
6 mph
SW
|
|
Friday
Jun 12
|
Sunny
|
96°F |
8 mph
W
|
|
Friday Night
Jun 12
|
Partly Cloudy
|
75°F |
7 mph
W
|
|
Saturday
Jun 13
|
Mostly Sunny then Chance Showers And Thunderstorms
|
95°F |
5 mph
W
|
|
Saturday Night
Jun 13
|
Chance Showers And Thunderstorms
|
72°F |
5 mph
SW
|
|
Sunday
Jun 14
|
Partly Sunny then Chance Showers And Thunderstorms
|
93°F |
6 mph
W
|
|
Sunday Night
Jun 14
|
Chance Showers And Thunderstorms
|
72°F |
6 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Johnston.