10-day forecast for Gretna, SD: 54° to 101°, with precipitation expected on 5 days. The table below breaks each day into morning, afternoon, evening and overnight.
101°
Best day: Tuesday, August 18
92° · 0.25 in
Worst day: Monday, August 10
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 1092° / 54°0.25
Morning59°feels 57°
Afternoon87°feels 85°
Evening92°feels 90°
Overnight59°feels 57°
92 °
Gretna, Monday, 10 August
Rain. High 92°, low 54°.
Pressure29.83 inHg
Wind7.3 mph S
Humidity40%
Visibility6.2 mi
Dew point59°
Tue, 1188° / 62°0.04
Morning65°feels 65°
Afternoon84°feels 83°
Evening82°feels 81°
Overnight63°feels 64°
88 °
Gretna, Tuesday, 11 August
Light rain. High 88°, low 62°.
Pressure29.88 inHg
Wind11.9 mph NE
Humidity40%
Visibility6.2 mi
Dew point53°
Wed, 1289° / 63°0
Morning67°feels 66°
Afternoon87°feels 84°
Evening82°feels 81°
Overnight67°feels 66°
89 °
Gretna, Wednesday, 12 August
Clear. High 89°, low 63°.
Pressure29.91 inHg
Wind10 mph E
Humidity27%
Visibility6.2 mi
Dew point46°
Thu, 1377° / 63°0
Morning67°feels 65°
Afternoon76°feels 75°
Evening71°feels 71°
Overnight70°feels 69°
77 °
Gretna, Thursday, 13 August
Overcast. High 77°, low 63°.
Pressure30.00 inHg
Wind15.2 mph E
Humidity39%
Visibility—
Dew point48°
Fri, 1478° / 57°0
Morning63°feels 63°
Afternoon76°feels 75°
Evening72°feels 71°
Overnight65°feels 64°
78 °
Gretna, Friday, 14 August
Overcast. High 78°, low 57°.
Pressure30.06 inHg
Wind16.7 mph S
Humidity43%
Visibility—
Dew point49°
Sat, 1579° / 62°0.04
Morning65°feels 66°
Afternoon73°feels 73°
Evening78°feels 78°
Overnight71°feels 71°
79 °
Gretna, Saturday, 15 August
Light rain. High 79°, low 62°.
Pressure30.06 inHg
Wind10.8 mph S
Humidity70%
Visibility—
Dew point60°
Sun, 1688° / 62°0
Morning68°feels 67°
Afternoon84°feels 82°
Evening85°feels 82°
Overnight71°feels 70°
88 °
Gretna, Sunday, 16 August
Overcast. High 88°, low 62°.
Pressure30.12 inHg
Wind9 mph E
Humidity29%
Visibility—
Dew point45°
Mon, 1791° / 67°0.12
Morning71°feels 71°
Afternoon85°feels 87°
Evening88°feels 91°
Overnight72°feels 73°
91 °
Gretna, Monday, 17 August
Light rain. High 91°, low 67°.
Pressure29.88 inHg
Wind16.7 mph SE
Humidity56%
Visibility—
Dew point64°
Tue, 18101° / 70°0
Morning80°feels 80°
Afternoon96°feels 95°
Evening93°feels 91°
Overnight82°feels 81°
101 °
Gretna, Tuesday, 18 August
Overcast. High 101°, low 70°.
Pressure29.71 inHg
Wind13.8 mph N
Humidity25%
Visibility—
Dew point52°
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 Gretna, 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.