10-day forecast for Gann Valley, SD: 62° to 94°, with precipitation expected on 7 days. The table below breaks each day into morning, afternoon, evening and overnight.
91°
Best day: Tuesday, August 11
79° · 1.55 in
Worst day: Thursday, August 13
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 1094° / 62°0.34
Morning64°feels 64°
Afternoon91°feels 89°
Evening84°feels 85°
Overnight66°feels 66°
94 °
Gann Valley, Monday, 10 August
Rain. High 94°, low 62°.
Pressure29.83 inHg
Wind3.4 mph S
Humidity37%
Visibility6.2 mi
Dew point59°
Tue, 1191° / 65°0
Morning70°feels 70°
Afternoon88°feels 88°
Evening85°feels 86°
Overnight66°feels 66°
91 °
Gann Valley, Tuesday, 11 August
Mostly clear. High 91°, low 65°.
Pressure29.83 inHg
Wind11.6 mph NE
Humidity46%
Visibility6.2 mi
Dew point61°
Wed, 1293° / 67°0.06
Morning70°feels 71°
Afternoon91°feels 89°
Evening85°feels 85°
Overnight75°feels 75°
93 °
Gann Valley, Wednesday, 12 August
Light rain. High 93°, low 67°.
Pressure29.83 inHg
Wind11.4 mph E
Humidity39%
Visibility6.2 mi
Dew point59°
Thu, 1379° / 63°1.55
Morning65°feels 66°
Afternoon77°feels 77°
Evening75°feels 75°
Overnight65°feels 65°
79 °
Gann Valley, Thursday, 13 August
Heavy rain. High 79°, low 63°.
Pressure29.94 inHg
Wind16.9 mph NE
Humidity58%
Visibility—
Dew point60°
Fri, 1470° / 62°0.77
Morning64°feels 65°
Afternoon69°feels 69°
Evening64°feels 64°
Overnight63°feels 64°
70 °
Gann Valley, Friday, 14 August
Rain. High 70°, low 62°.
Pressure30.03 inHg
Wind16.1 mph SE
Humidity66%
Visibility—
Dew point57°
Sat, 1579° / 65°0.07
Morning68°feels 69°
Afternoon75°feels 76°
Evening75°feels 75°
Overnight68°feels 69°
79 °
Gann Valley, Saturday, 15 August
Light rain. High 79°, low 65°.
Pressure30.06 inHg
Wind7.4 mph NE
Humidity74%
Visibility—
Dew point65°
Sun, 1684° / 64°0
Morning69°feels 69°
Afternoon82°feels 82°
Evening81°feels 81°
Overnight71°feels 71°
84 °
Gann Valley, Sunday, 16 August
Overcast. High 84°, low 64°.
Pressure30.15 inHg
Wind8.3 mph SE
Humidity47%
Visibility—
Dew point57°
Mon, 1787° / 64°0.11
Morning69°feels 70°
Afternoon83°feels 86°
Evening84°feels 87°
Overnight71°feels 72°
87 °
Gann Valley, Monday, 17 August
Light rain. High 87°, low 64°.
Pressure29.91 inHg
Wind19.5 mph S
Humidity57%
Visibility—
Dew point64°
Tue, 1893° / 66°1.13
Morning74°feels 74°
Afternoon91°feels 90°
Evening84°feels 83°
Overnight73°feels 73°
93 °
Gann Valley, Tuesday, 18 August
Heavy rain. High 93°, low 66°.
Pressure29.74 inHg
Wind19.1 mph NW
Humidity30%
Visibility—
Dew point53°
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 Gann Valley, 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.