10-day forecast for Johnston, SC: 42° to 75°, with precipitation expected on 1 day. The table below breaks each day into morning, afternoon, evening and overnight.
75°
Best day: Tuesday, October 20
73° · 0.11 in
Worst day: Wednesday, October 28
Tap any day below to see morning, afternoon, evening and overnight.
Tue, 2075° / 43°0
Morning45°feels 41°
Afternoon75°feels 73°
Evening55°feels 53°
Overnight44°feels 40°
75 °
Johnston, Tuesday, 20 October
Partly cloudy. High 75°, low 43°.
Pressure30.24 inHg
Wind7.7 mph NE
Humidity35%
Visibility6.2 mi
Dew point39°
Wed, 2172° / 44°0
Morning46°feels 42°
Afternoon70°feels 69°
Evening59°feels 57°
Overnight46°feels 42°
72 °
Johnston, Wednesday, 21 October
Clear. High 72°, low 44°.
Pressure30.21 inHg
Wind6.6 mph NE
Humidity49%
Visibility6.2 mi
Dew point46°
Thu, 2273° / 48°0
Morning48°feels 48°
Afternoon73°feels 71°
Evening59°feels 57°
Overnight51°feels 50°
73 °
Johnston, Thursday, 22 October
Clear. High 73°, low 48°.
Pressure30.15 inHg
Wind3.8 mph NE
Humidity48%
Visibility6.2 mi
Dew point49°
Fri, 2370° / 50°0
Morning50°feels 49°
Afternoon70°feels 68°
Evening58°feels 56°
Overnight51°feels 50°
70 °
Johnston, Friday, 23 October
Clear. High 70°, low 50°.
Pressure30.21 inHg
Wind6.2 mph NE
Humidity48%
Visibility6.2 mi
Dew point45°
Sat, 2462° / 45°0
Morning49°feels 46°
Afternoon60°feels 58°
Evening53°feels 51°
Overnight50°feels 47°
62 °
Johnston, Saturday, 24 October
Clear. High 62°, low 45°.
Pressure30.42 inHg
Wind10.1 mph NE
Humidity36%
Visibility—
Dew point32°
Sun, 2569° / 44°0
Morning51°feels 47°
Afternoon66°feels 64°
Evening56°feels 54°
Overnight51°feels 49°
69 °
Johnston, Sunday, 25 October
Clear. High 69°, low 44°.
Pressure30.39 inHg
Wind12.5 mph NE
Humidity39%
Visibility—
Dew point39°
Mon, 2671° / 46°0
Morning53°feels 51°
Afternoon69°feels 67°
Evening58°feels 55°
Overnight52°feels 50°
71 °
Johnston, Monday, 26 October
Overcast. High 71°, low 46°.
Pressure30.30 inHg
Wind9.6 mph NE
Humidity32%
Visibility—
Dew point37°
Tue, 2774° / 50°0
Morning57°feels 55°
Afternoon72°feels 71°
Evening64°feels 63°
Overnight60°feels 58°
74 °
Johnston, Tuesday, 27 October
Overcast. High 74°, low 50°.
Pressure30.18 inHg
Wind5.4 mph NE
Humidity41%
Visibility—
Dew point46°
Wed, 2873° / 55°0.11
Morning60°feels 59°
Afternoon71°feels 70°
Evening64°feels 63°
Overnight59°feels 57°
73 °
Johnston, Wednesday, 28 October
Light rain. High 73°, low 55°.
Pressure30.03 inHg
Wind14.3 mph NE
Humidity38%
Visibility—
Dew point43°
About this forecast
How reliable is a 10-day forecast?
The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.
What does the time-of-day table show?
Temperature in Johnston, SC around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.
How is the best day chosen?
We weigh the daytime high against precipitation: a warm, dry day scores highest.