10-day forecast for Johns Island, SC: 72° to 102°, with precipitation expected on 7 days. The table below breaks each day into morning, afternoon, evening and overnight.
101°
Best day: Wednesday, August 12
95° · 3.71 in
Worst day: Tuesday, August 18
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 1093° / 75°0
Morning77°feels 78°
Afternoon92°feels 91°
Evening86°feels 92°
Overnight77°feels 79°
93 °
Johns Island, Monday, 10 August
Light rain. High 93°, low 75°.
Pressure30.12 inHg
Wind5.6 mph W
Humidity43%
Visibility6.2 mi
Dew point70°
Tue, 11101° / 73°0.12
Morning77°feels 79°
Afternoon100°feels 103°
Evening86°feels 93°
Overnight77°feels 78°
101 °
Johns Island, Tuesday, 11 August
Rain. High 101°, low 73°.
Pressure30.06 inHg
Wind8.3 mph W
Humidity41%
Visibility6.2 mi
Dew point68°
Wed, 12101° / 77°0.01
Morning80°feels 80°
Afternoon101°feels 104°
Evening89°feels 91°
Overnight81°feels 85°
101 °
Johns Island, Wednesday, 12 August
Light rain. High 101°, low 77°.
Pressure29.94 inHg
Wind10.1 mph W
Humidity39%
Visibility6.2 mi
Dew point68°
Thu, 13101° / 76°0.04
Morning78°feels 79°
Afternoon99°feels 103°
Evening87°feels 95°
Overnight78°feels 79°
101 °
Johns Island, Thursday, 13 August
Light rain. High 101°, low 76°.
Pressure29.94 inHg
Wind8.2 mph W
Humidity40%
Visibility6.2 mi
Dew point69°
Fri, 14102° / 79°0.08
Morning87°feels 92°
Afternoon99°feels 104°
Evening82°feels 88°
Overnight81°feels 88°
102 °
Johns Island, Friday, 14 August
Light rain. High 102°, low 79°.
Pressure30.03 inHg
Wind8.5 mph S
Humidity32%
Visibility—
Dew point64°
Sat, 1590° / 78°0.49
Morning83°feels 89°
Afternoon86°feels 94°
Evening79°feels 79°
Overnight79°feels 81°
90 °
Johns Island, Saturday, 15 August
Rain. High 90°, low 78°.
Pressure30.15 inHg
Wind9.5 mph SE
Humidity66%
Visibility—
Dew point74°
Sun, 1687° / 74°0.17
Morning80°feels 84°
Afternoon85°feels 93°
Evening80°feels 84°
Overnight78°feels 80°
87 °
Johns Island, Sunday, 16 August
Light rain. High 87°, low 74°.
Pressure30.12 inHg
Wind7.1 mph E
Humidity70%
Visibility—
Dew point74°
Mon, 1793° / 76°0.07
Morning83°feels 86°
Afternoon91°feels 102°
Evening82°feels 90°
Overnight80°feels 85°
93 °
Johns Island, Monday, 17 August
Light rain. High 93°, low 76°.
Pressure29.97 inHg
Wind11.6 mph S
Humidity56%
Visibility—
Dew point73°
Tue, 1895° / 72°3.71
Morning82°feels 85°
Afternoon92°feels 99°
Evening76°feels 78°
Overnight73°feels 75°
95 °
Johns Island, Tuesday, 18 August
Heavy rain. High 95°, low 72°.
Pressure29.91 inHg
Wind11.5 mph S
Humidity46%
Visibility—
Dew point69°
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 Johns Island, 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.