10-day forecast for St. Charles, SD: 59° to 104°, with precipitation expected on 2 days. The table below breaks each day into morning, afternoon, evening and overnight.
104°
Best day: Tuesday, August 18
70° · 1.22 in
Worst day: Thursday, August 13
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 1096° / 66°0
Morning68°feels 68°
Afternoon92°feels 90°
Evening95°feels 93°
Overnight72°feels 72°
96 °
St. Charles, Monday, 10 August
Partly cloudy. High 96°, low 66°.
Pressure29.83 inHg
Wind17 mph SE
Humidity39%
Visibility6.2 mi
Dew point61°
Tue, 1196° / 63°0
Morning68°feels 68°
Afternoon92°feels 91°
Evening90°feels 89°
Overnight72°feels 72°
96 °
St. Charles, Tuesday, 11 August
Overcast. High 96°, low 63°.
Pressure29.80 inHg
Wind14 mph NE
Humidity40%
Visibility6.2 mi
Dew point60°
Wed, 1291° / 65°0.14
Morning68°feels 68°
Afternoon89°feels 88°
Evening85°feels 85°
Overnight66°feels 67°
91 °
St. Charles, Wednesday, 12 August
Light rain. High 91°, low 65°.
Pressure29.85 inHg
Wind8.3 mph E
Humidity43%
Visibility6.2 mi
Dew point60°
Thu, 1370° / 59°1.22
Morning62°feels 62°
Afternoon60°feels 60°
Evening60°feels 60°
Overnight60°feels 60°
70 °
St. Charles, Thursday, 13 August
Rain. High 70°, low 59°.
Pressure30.00 inHg
Wind17.3 mph E
Humidity93%
Visibility—
Dew point58°
Fri, 1461° / 59°0.02
Morning60°feels 60°
Afternoon60°feels 60°
Evening60°feels 60°
Overnight60°feels 60°
61 °
St. Charles, Friday, 14 August
Light rain. High 61°, low 59°.
Pressure30.12 inHg
Wind11.9 mph SE
Humidity96%
Visibility—
Dew point59°
Sat, 1576° / 60°0.01
Morning63°feels 64°
Afternoon70°feels 70°
Evening75°feels 76°
Overnight69°feels 69°
76 °
St. Charles, Saturday, 15 August
Light rain. High 76°, low 60°.
Pressure30.09 inHg
Wind7.2 mph SE
Humidity84%
Visibility—
Dew point62°
Sun, 1684° / 65°0
Morning69°feels 69°
Afternoon79°feels 79°
Evening79°feels 80°
Overnight69°feels 69°
84 °
St. Charles, Sunday, 16 August
Overcast. High 84°, low 65°.
Pressure30.15 inHg
Wind8.4 mph SE
Humidity59%
Visibility—
Dew point61°
Mon, 1790° / 66°0
Morning71°feels 73°
Afternoon85°feels 88°
Evening88°feels 92°
Overnight79°feels 81°
90 °
St. Charles, Monday, 17 August
Partly cloudy. High 90°, low 66°.
Pressure29.94 inHg
Wind16.5 mph S
Humidity56%
Visibility—
Dew point65°
Tue, 18104° / 75°0
Morning82°feels 82°
Afternoon99°feels 100°
Evening94°feels 96°
Overnight81°feels 80°
104 °
St. Charles, Tuesday, 18 August
Clear. High 104°, low 75°.
Pressure29.71 inHg
Wind16.1 mph S
Humidity28%
Visibility—
Dew point57°
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 St. Charles, SD 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.