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As of 06:42 CDT

Weather in Gann Valley, SD

64°Current weather

Gann Valley, Sunday, 9 August, 06:42

Clear. Feels like 64°. High 90°, low 64°.

Pressure29.77 inHg
Wind4.3 mph SE
Humidity87%
Visibility6.2 mi
Dew point60°
Mon, 1093° / 62°0.18Rain
93 °Rain

Gann Valley, Monday, 10 August

Rain. High 93°, low 62°.

Pressure29.83 inHg
Wind13.2 mph SE
Humidity35%
Visibility6.2 mi
Dew point58°
Tue, 1192° / 64°0.02Light rain
92 °Light rain

Gann Valley, Tuesday, 11 August

Light rain. High 92°, low 64°.

Pressure29.83 inHg
Wind14.2 mph NE
Humidity40%
Visibility6.2 mi
Dew point58°
Wed, 1293° / 65°0.04Light rain
93 °Light rain

Gann Valley, Wednesday, 12 August

Light rain. High 93°, low 65°.

Pressure29.88 inHg
Wind11.5 mph E
Humidity34%
Visibility6.2 mi
Dew point53°
Thu, 1375° / 60°0.3Rain
75 °Rain

Gann Valley, Thursday, 13 August

Rain. High 75°, low 60°.

Pressure30.03 inHg
Wind12.2 mph SE
Humidity88%
Visibility—
Dew point60°
Fri, 1468° / 57°0Overcast
68 °Overcast

Gann Valley, Friday, 14 August

Overcast. High 68°, low 57°.

Pressure30.12 inHg
Wind14 mph SE
Humidity68%
Visibility—
Dew point56°
Sat, 1575° / 62°0Overcast
75 °Overcast

Gann Valley, Saturday, 15 August

Overcast. High 75°, low 62°.

Pressure30.09 inHg
Wind10.8 mph SE
Humidity71%
Visibility—
Dew point61°
Sun, 1690° / 65°0Overcast
90 °Overcast

Gann Valley, Sunday, 16 August

Overcast. High 90°, low 65°.

Pressure30.12 inHg
Wind10.4 mph S
Humidity35%
Visibility—
Dew point53°
Mon, 1794° / 67°0.01Light rain
94 °Light rain

Gann Valley, Monday, 17 August

Light rain. High 94°, low 67°.

Pressure29.91 inHg
Wind18.7 mph S
Humidity46%
Visibility—
Dew point62°
Tue, 18105° / 74°0Mostly clear
105 °Mostly clear

Gann Valley, Tuesday, 18 August

Mostly clear. High 105°, low 74°.

Pressure29.71 inHg
Wind10.9 mph S
Humidity29%
Visibility—
Dew point59°
Wed, 19104° / 79°0Light rain
104 °Light rain

Gann Valley, Wednesday, 19 August

Light rain. High 104°, low 79°.

Pressure29.68 inHg
Wind13.7 mph S
Humidity20%
Visibility—
Dew point52°
Thu, 2088° / 71°0.01Light rain
88 °Light rain

Gann Valley, Thursday, 20 August

Light rain. High 88°, low 71°.

Pressure29.97 inHg
Wind16.5 mph NE
Humidity28%
Visibility—
Dew point46°
Fri, 2187° / 66°0.08Light rain
87 °Light rain

Gann Valley, Friday, 21 August

Light rain. High 87°, low 66°.

Pressure29.88 inHg
Wind15.6 mph E
Humidity52%
Visibility—
Dew point61°
Sat, 2298° / 67°0.16Light rain
98 °Light rain

Gann Valley, Saturday, 22 August

Light rain. High 98°, low 67°.

Pressure29.68 inHg
Wind15.5 mph SE
Humidity36%
Visibility—
Dew point59°
Sun, 2382° / 67°0.27Light rain
82 °Light rain

Gann Valley, Sunday, 23 August

Light rain. High 82°, low 67°.

Pressure29.91 inHg
Wind16.3 mph NE
Humidity83%
Visibility—
Dew point66°
Mon, 2484° / 65°0.02Light rain
84 °Light rain

Gann Valley, Monday, 24 August

Light rain. High 84°, low 65°.

Pressure30.00 inHg
Wind12.9 mph E
Humidity68%
Visibility—
Dew point63°

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 Gann Valley, 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 Gann Valley, 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.