Green Valley, SD Weather Forecast

Local 7-day forecast

93°

Mostly Sunny then Slight Chance Showers And Thunderstorms

Track current conditions, temperature changes, wind, and the full daily outlook for Green Valley, SD in one place.

Saturday, July 18, 2026

Wind: 8 to 13 mph SE

Today

A slight chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 93. Southeast wind 8 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.

Local 7-day forecast

Local Weather Overview

This forecast page for Green Valley, SD is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Jul 18, 2026 1:17 PM MDT.

The active forecast window currently covers Jul 18 to Jul 24, 2026 for Green Valley, SD.

Page Snapshot

Page focus: city weather
Forecast window: Jul 18 to Jul 24, 2026
Latest sync: Jul 18, 2026 1:17 PM MDT
Forecast office: UNR
Source: NOAA / NWS

Next High

93°F

Today

Next Low

71°F

Tonight

Rain Outlook

Periods mentioning precipitation

Windiest

9 to 22 mph

Monday

Daily Outlook

Today

Jul 18

Mostly Sunny then Slight Chance Showers And Thunderstorms

93 °F

/ 71°F

Wind 8 to 13 mph

Sun

Jul 19

Mostly Sunny then Slight Chance Showers And Thunderstorms

103 °F

/ 70°F

Wind 7 to 10 mph

Mon

Jul 20

Sunny

98 °F

/ 65°F

Wind 9 to 22 mph

Tue

Jul 21

Mostly Sunny

89 °F

/ 64°F

Wind 5 to 13 mph

Wed

Jul 22

Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms

89 °F

/ 64°F

Wind 5 to 14 mph

Thu

Jul 23

Partly Sunny then Chance Showers And Thunderstorms

90 °F

/ 64°F

Wind 6 to 10 mph

Fri

Jul 24

Mostly Sunny then Chance Showers And Thunderstorms

89 °F

/ 65°F

Wind 3 to 13 mph

This Week in Green Valley

Sunday looks like the warmest upcoming period in Green Valley at 103 degrees F.

Tuesday Night is the coolest period ahead with temperatures near 64 degrees F.

The strongest winds are forecast for Monday at about 9 to 22 mph NW.

Precipitation is mentioned in 11 upcoming forecast periods.

Forecast Details

Last updated: Jul 18, 2026 1:17 PM MDT
Coverage: 8 days
Time zone: America/Denver
Forecast office: UNR
Radar station: KUDX

Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.

Open NOAA source

Extended Forecast

Tonight

Jul 18

71°F

Slight Chance Showers And Thunderstorms

6 to 13 mph S

A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 71. South wind 6 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.

Sunday

Jul 19

103°F

Mostly Sunny then Slight Chance Showers And Thunderstorms

7 to 10 mph S

A slight chance of showers and thunderstorms after noon. Mostly sunny. High near 103, with temperatures falling to around 100 in the afternoon. Heat index values as high as 100. South wind 7 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.

Sunday Night

Jul 19

70°F

Slight Chance Showers And Thunderstorms then Partly Cloudy

5 to 8 mph W

A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 70. West wind 5 to 8 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

Monday

Jul 20

98°F

Sunny

9 to 22 mph NW

Sunny. High near 98, with temperatures falling to around 96 in the afternoon. Northwest wind 9 to 22 mph, with gusts as high as 35 mph.

Monday Night

Jul 20

65°F

Mostly Clear

5 to 22 mph N

Mostly clear, with a low around 65. North wind 5 to 22 mph, with gusts as high as 35 mph.

Tuesday

Jul 21

89°F

Mostly Sunny

5 to 13 mph NE

Mostly sunny, with a high near 89.

Tuesday Night

Jul 21

64°F

Mostly Cloudy then Chance Showers And Thunderstorms

5 to 13 mph E

A chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 64.

Wednesday

Jul 22

89°F

Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms

5 to 14 mph SE

A chance of showers and thunderstorms before noon, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 89.

Wednesday Night

Jul 22

64°F

Slight Chance Showers And Thunderstorms

5 to 14 mph SE

A slight chance of showers and thunderstorms. Partly cloudy, with a low around 64.

Thursday

Jul 23

90°F

Partly Sunny then Chance Showers And Thunderstorms

6 to 10 mph SE

A chance of showers and thunderstorms after noon. Partly sunny, with a high near 90.

Thursday Night

Jul 23

64°F

Chance Showers And Thunderstorms

3 to 10 mph S

A chance of showers and thunderstorms. Mostly cloudy, with a low around 64.

Friday

Jul 24

89°F

Mostly Sunny then Chance Showers And Thunderstorms

3 to 13 mph NE

A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 89.

Friday Night

Jul 24

65°F

Chance Showers And Thunderstorms

6 to 13 mph SE

A chance of showers and thunderstorms. Partly cloudy, with a low around 65.

Detailed Forecast

Period	Conditions	Temp	Wind	Details
Today Jul 18	Mostly Sunny then Slight Chance Showers And Thunderstorms	93°F	8 to 13 mph SE	A slight chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 93. Southeast wind 8 to 13 mph, w...
Tonight Jul 18	Slight Chance Showers And Thunderstorms	71°F	6 to 13 mph S	A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 71. South wind 6 to 13 mph, with gusts as...
Sunday Jul 19	Mostly Sunny then Slight Chance Showers And Thunderstorms	103°F	7 to 10 mph S	A slight chance of showers and thunderstorms after noon. Mostly sunny. High near 103, with temperatures falling to aroun...
Sunday Night Jul 19	Slight Chance Showers And Thunderstorms then Partly Cloudy	70°F	5 to 8 mph W	A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 70. West wind 5 to 8 mph,...
Monday Jul 20	Sunny	98°F	9 to 22 mph NW	Sunny. High near 98, with temperatures falling to around 96 in the afternoon. Northwest wind 9 to 22 mph, with gusts as...
Monday Night Jul 20	Mostly Clear	65°F	5 to 22 mph N	Mostly clear, with a low around 65. North wind 5 to 22 mph, with gusts as high as 35 mph.
Tuesday Jul 21	Mostly Sunny	89°F	5 to 13 mph NE	Mostly sunny, with a high near 89.
Tuesday Night Jul 21	Mostly Cloudy then Chance Showers And Thunderstorms	64°F	5 to 13 mph E	A chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 64.
Wednesday Jul 22	Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms	89°F	5 to 14 mph SE	A chance of showers and thunderstorms before noon, then a slight chance of showers and thunderstorms. Partly sunny, with...
Wednesday Night Jul 22	Slight Chance Showers And Thunderstorms	64°F	5 to 14 mph SE	A slight chance of showers and thunderstorms. Partly cloudy, with a low around 64.
Thursday Jul 23	Partly Sunny then Chance Showers And Thunderstorms	90°F	6 to 10 mph SE	A chance of showers and thunderstorms after noon. Partly sunny, with a high near 90.
Thursday Night Jul 23	Chance Showers And Thunderstorms	64°F	3 to 10 mph S	A chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Friday Jul 24	Mostly Sunny then Chance Showers And Thunderstorms	89°F	3 to 13 mph NE	A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 89.
Friday Night Jul 24	Chance Showers And Thunderstorms	65°F	6 to 13 mph SE	A chance of showers and thunderstorms. Partly cloudy, with a low around 65.

Nearby Forecasts

Explore weather pages for nearby cities and major places around Green Valley.

Region Links

Pennington County weather

County forecast page

South Dakota weather

Statewide weather overview

United States weather

National weather entry point

Weather data provided by the National Weather Service (NOAA). Forecast pages update automatically as new periods are synced for each supported U.S. location.