As of 03:22 MDT

Weather in Dewey, SD

65°

Dewey, Sunday, 11 October, 03:22

Overcast. Feels like 64°. High 66°, low 49°.

Pressure29.77 inHg

Wind8.1 mph NW

Humidity61%

Visibility6.2 mi

Dew point50°

See detailed hourly forecast

Mon, 1258° / 45°

58 °

Dewey, Monday, 12 October

Partly cloudy. High 58°, low 45°.

Pressure29.88 inHg

Wind16.2 mph NW

Humidity64%

Visibility6.2 mi

Dew point43°

Tue, 1356° / 42°

0.36

56 °

Dewey, Tuesday, 13 October

Heavy rain. High 56°, low 42°.

Pressure29.97 inHg

Wind10 mph SE

Humidity62%

Visibility6.2 mi

Dew point40°

Wed, 1451° / 44°

0.46

51 °

Dewey, Wednesday, 14 October

Rain. High 51°, low 44°.

Pressure30.18 inHg

Wind7.4 mph SE

Humidity66%

Visibility6.2 mi

Dew point40°

Thu, 1550° / 44°

0.58

50 °

Dewey, Thursday, 15 October

Rain. High 50°, low 44°.

Pressure30.36 inHg

Wind9.4 mph NW

Humidity93%

Visibility—

Dew point46°

Fri, 1652° / 31°

52 °

Dewey, Friday, 16 October

Clear. High 52°, low 31°.

Pressure30.71 inHg

Wind13 mph SE

Humidity54%

Visibility—

Dew point28°

Sat, 1758° / 31°

58 °

Dewey, Saturday, 17 October

Clear. High 58°, low 31°.

Pressure30.30 inHg

Wind11.5 mph E

Humidity26%

Visibility—

Dew point13°

Sun, 1872° / 46°

72 °

Dewey, Sunday, 18 October

Clear. High 72°, low 46°.

Pressure30.00 inHg

Wind7.7 mph NW

Humidity24%

Visibility—

Dew point26°

Mon, 1974° / 48°

74 °

Dewey, Monday, 19 October

Partly cloudy. High 74°, low 48°.

Pressure29.88 inHg

Wind5.8 mph E

Humidity25%

Visibility—

Dew point27°

Tue, 2068° / 50°

68 °

Dewey, Tuesday, 20 October

Mostly clear. High 68°, low 50°.

Pressure29.85 inHg

Wind10.9 mph E

Humidity34%

Visibility—

Dew point33°

Wed, 2162° / 48°

62 °

Dewey, Wednesday, 21 October

Clear. High 62°, low 48°.

Pressure30.12 inHg

Wind12.4 mph E

Humidity32%

Visibility—

Dew point28°

Thu, 2269° / 45°

69 °

Dewey, Thursday, 22 October

Overcast. High 69°, low 45°.

Pressure30.09 inHg

Wind14 mph E

Humidity36%

Visibility—

Dew point30°

Fri, 2362° / 49°

62 °

Dewey, Friday, 23 October

Clear. High 62°, low 49°.

Pressure30.03 inHg

Wind25.7 mph NW

Humidity46%

Visibility—

Dew point37°

Sat, 2456° / 38°

56 °

Dewey, Saturday, 24 October

Overcast. High 56°, low 38°.

Pressure30.39 inHg

Wind9 mph NW

Humidity25%

Visibility—

Dew point15°

Sun, 2562° / 39°

62 °

Dewey, Sunday, 25 October

Clear. High 62°, low 39°.

Pressure30.33 inHg

Wind12.1 mph NW

Humidity29%

Visibility—

Dew point22°

Mon, 2664° / 42°

64 °

Dewey, Monday, 26 October

Clear. High 64°, low 42°.

Pressure30.21 inHg

Wind7.2 mph SE

Humidity27%

Visibility—

Dew point22°

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 Dewey, 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 Dewey, 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.