10-day forecast for Isabel, SD: 58° to 99°, with precipitation expected on 6 days. The table below breaks each day into morning, afternoon, evening and overnight.
95°
Best day: Saturday, August 8
91° · 0.59 in
Worst day: Friday, August 14
Tap any day below to see morning, afternoon, evening and overnight.
Sun, 0990° / 61°0
Morning68°feels 66°
Afternoon88°feels 85°
Evening80°feels 80°
Overnight68°feels 67°
90 °
Isabel, Sunday, 9 August
Overcast. High 90°, low 61°.
Pressure29.83 inHg
Wind14.8 mph E
Humidity27%
Visibility6.2 mi
Dew point48°
Mon, 1099° / 65°0.18
Morning75°feels 75°
Afternoon97°feels 96°
Evening68°feels 69°
Overnight70°feels 69°
99 °
Isabel, Monday, 10 August
Rain. High 99°, low 65°.
Pressure29.77 inHg
Wind6.2 mph S
Humidity35%
Visibility6.2 mi
Dew point61°
Tue, 1190° / 63°0
Morning69°feels 69°
Afternoon88°feels 86°
Evening81°feels 80°
Overnight66°feels 66°
90 °
Isabel, Tuesday, 11 August
Clear. High 90°, low 63°.
Pressure29.88 inHg
Wind8.3 mph NE
Humidity37%
Visibility6.2 mi
Dew point55°
Wed, 1287° / 66°0.56
Morning73°feels 72°
Afternoon87°feels 85°
Evening66°feels 67°
Overnight72°feels 71°
87 °
Isabel, Wednesday, 12 August
Rain. High 87°, low 66°.
Pressure29.85 inHg
Wind10 mph E
Humidity36%
Visibility6.2 mi
Dew point55°
Thu, 1380° / 58°0
Morning63°feels 61°
Afternoon76°feels 75°
Evening78°feels 78°
Overnight68°feels 67°
80 °
Isabel, Thursday, 13 August
Overcast. High 80°, low 58°.
Pressure30.09 inHg
Wind13.3 mph E
Humidity37%
Visibility—
Dew point45°
Fri, 1491° / 63°0.59
Morning69°feels 67°
Afternoon84°feels 83°
Evening87°feels 85°
Overnight69°feels 69°
91 °
Isabel, Friday, 14 August
Heavy rain. High 91°, low 63°.
Pressure30.00 inHg
Wind23.8 mph SE
Humidity38%
Visibility—
Dew point52°
Sat, 1589° / 69°0.05
Morning74°feels 74°
Afternoon85°feels 85°
Evening88°feels 86°
Overnight80°feels 80°
89 °
Isabel, Saturday, 15 August
Light rain. High 89°, low 69°.
Pressure29.97 inHg
Wind10 mph S
Humidity47%
Visibility—
Dew point60°
Sun, 1690° / 73°0.11
Morning77°feels 78°
Afternoon87°feels 89°
Evening88°feels 86°
Overnight78°feels 78°
90 °
Isabel, Sunday, 16 August
Light rain. High 90°, low 73°.
Pressure29.91 inHg
Wind11.1 mph NW
Humidity51%
Visibility—
Dew point65°
Mon, 1792° / 67°0.04
Morning72°feels 72°
Afternoon85°feels 85°
Evening88°feels 86°
Overnight69°feels 70°
92 °
Isabel, Monday, 17 August
Light rain. High 92°, low 67°.
Pressure29.97 inHg
Wind21.8 mph NE
Humidity43%
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 Isabel, 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.