As of 12:22 MDT

Weather in Green Grass, SD

87°

Green Grass, Saturday, 8 August, 12:22

Clear. Feels like 86°. High 97°, low 61°.

Pressure29.80 inHg

Wind14.3 mph S

Humidity36%

Visibility6.2 mi

Dew point57°

See detailed hourly forecast

Sun, 0991° / 63°

91 °

Green Grass, Sunday, 9 August

Partly cloudy. High 91°, low 63°.

Pressure29.83 inHg

Wind15.7 mph NE

Humidity29%

Visibility6.2 mi

Dew point50°

Mon, 10100° / 66°

0.02

100 °

Green Grass, Monday, 10 August

Light rain. High 100°, low 66°.

Pressure29.74 inHg

Wind14 mph S

Humidity28%

Visibility6.2 mi

Dew point56°

Tue, 1190° / 63°

90 °

Green Grass, Tuesday, 11 August

Partly cloudy. High 90°, low 63°.

Pressure29.88 inHg

Wind11.5 mph NE

Humidity39%

Visibility6.2 mi

Dew point56°

Wed, 1284° / 65°

0.05

84 °

Green Grass, Wednesday, 12 August

Light rain. High 84°, low 65°.

Pressure29.88 inHg

Wind9.9 mph NE

Humidity33%

Visibility6.2 mi

Dew point52°

Thu, 1379° / 55°

79 °

Green Grass, Thursday, 13 August

Clear. High 79°, low 55°.

Pressure30.15 inHg

Wind11.1 mph NE

Humidity27%

Visibility—

Dew point34°

Fri, 1487° / 62°

0.23

87 °

Green Grass, Friday, 14 August

Light rain. High 87°, low 62°.

Pressure29.94 inHg

Wind22.8 mph S

Humidity35%

Visibility—

Dew point49°

Sat, 1579° / 65°

0.19

79 °

Green Grass, Saturday, 15 August

Light rain. High 79°, low 65°.

Pressure29.94 inHg

Wind13.4 mph SE

Humidity52%

Visibility—

Dew point57°

Sun, 1684° / 67°

0.11

84 °

Green Grass, Sunday, 16 August

Light rain. High 84°, low 67°.

Pressure29.94 inHg

Wind9.3 mph NW

Humidity69%

Visibility—

Dew point64°

Mon, 1786° / 63°

86 °

Green Grass, Monday, 17 August

Clear. High 86°, low 63°.

Pressure30.00 inHg

Wind9.2 mph SE

Humidity38%

Visibility—

Dew point50°

Tue, 1887° / 70°

87 °

Green Grass, Tuesday, 18 August

Overcast. High 87°, low 70°.

Pressure29.94 inHg

Wind18.1 mph N

Humidity31%

Visibility—

Dew point50°

Wed, 1977° / 63°

77 °

Green Grass, Wednesday, 19 August

Overcast. High 77°, low 63°.

Pressure30.21 inHg

Wind10.4 mph E

Humidity40%

Visibility—

Dew point48°

Thu, 2080° / 59°

80 °

Green Grass, Thursday, 20 August

Overcast. High 80°, low 59°.

Pressure30.18 inHg

Wind18.4 mph SE

Humidity31%

Visibility—

Dew point42°

Fri, 2192° / 65°

92 °

Green Grass, Friday, 21 August

Partly cloudy. High 92°, low 65°.

Pressure29.91 inHg

Wind16.1 mph SE

Humidity36%

Visibility—

Dew point54°

Sat, 2293° / 70°

93 °

Green Grass, Saturday, 22 August

Overcast. High 93°, low 70°.

Pressure29.85 inHg

Wind15.6 mph SE

Humidity37%

Visibility—

Dew point56°

Sun, 2393° / 69°

0.08

93 °

Green Grass, Sunday, 23 August

Light rain. High 93°, low 69°.

Pressure29.80 inHg

Wind11.6 mph SE

Humidity41%

Visibility—

Dew point60°

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Green Grass, SD are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Green Grass, SD since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.