As of 12:06 MDT

Weather in Dewey, SD

75°

Dewey, Saturday, 10 October, 12:06

Clear. Feels like 74°. High 80°, low 63°.

Pressure29.53 inHg

Wind2.8 mph S

Humidity29%

Visibility6.2 mi

Dew point41°

See detailed hourly forecast

Sun, 1167° / 57°

0.05

67 °

Dewey, Sunday, 11 October

Light rain. High 67°, low 57°.

Pressure29.71 inHg

Wind9.6 mph S

Humidity58%

Visibility6.2 mi

Dew point49°

Mon, 1260° / 45°

0.05

60 °

Dewey, Monday, 12 October

Light rain. High 60°, low 45°.

Pressure29.83 inHg

Wind12.2 mph NW

Humidity66%

Visibility6.2 mi

Dew point49°

Tue, 1355° / 42°

0.07

55 °

Dewey, Tuesday, 13 October

Rain. High 55°, low 42°.

Pressure30.00 inHg

Wind9.7 mph SE

Humidity67%

Visibility6.2 mi

Dew point41°

Wed, 1456° / 46°

0.01

56 °

Dewey, Wednesday, 14 October

Light rain. High 56°, low 46°.

Pressure30.21 inHg

Wind9.8 mph SE

Humidity60%

Visibility6.2 mi

Dew point40°

Thu, 1557° / 46°

0.16

57 °

Dewey, Thursday, 15 October

Rain. High 57°, low 46°.

Pressure30.30 inHg

Wind11.1 mph E

Humidity66%

Visibility—

Dew point41°

Fri, 1649° / 33°

49 °

Dewey, Friday, 16 October

Mostly clear. High 49°, low 33°.

Pressure30.65 inHg

Wind27 mph NW

Humidity29%

Visibility—

Dew point11°

Sat, 1757° / 26°

57 °

Dewey, Saturday, 17 October

Clear. High 57°, low 26°.

Pressure30.42 inHg

Wind15.8 mph SE

Humidity26%

Visibility—

Dew point9°

Sun, 1868° / 42°

68 °

Dewey, Sunday, 18 October

Overcast. High 68°, low 42°.

Pressure30.00 inHg

Wind7 mph NW

Humidity20%

Visibility—

Dew point19°

Mon, 1976° / 47°

76 °

Dewey, Monday, 19 October

Overcast. High 76°, low 47°.

Pressure29.85 inHg

Wind11.3 mph W

Humidity25%

Visibility—

Dew point28°

Tue, 2059° / 41°

0.06

59 °

Dewey, Tuesday, 20 October

Light rain. High 59°, low 41°.

Pressure29.68 inHg

Wind26 mph NW

Humidity55%

Visibility—

Dew point40°

Wed, 2164° / 37°

64 °

Dewey, Wednesday, 21 October

Clear. High 64°, low 37°.

Pressure30.03 inHg

Wind18.1 mph NW

Humidity37%

Visibility—

Dew point26°

Thu, 2260° / 43°

60 °

Dewey, Thursday, 22 October

Clear. High 60°, low 43°.

Pressure30.15 inHg

Wind8.9 mph E

Humidity27%

Visibility—

Dew point21°

Fri, 2370° / 43°

70 °

Dewey, Friday, 23 October

Mostly clear. High 70°, low 43°.

Pressure29.94 inHg

Wind7.7 mph E

Humidity27%

Visibility—

Dew point25°

Sat, 2469° / 50°

69 °

Dewey, Saturday, 24 October

Partly cloudy. High 69°, low 50°.

Pressure29.97 inHg

Wind16.4 mph NW

Humidity25%

Visibility—

Dew point29°

Sun, 2556° / 38°

56 °

Dewey, Sunday, 25 October

Overcast. High 56°, low 38°.

Pressure30.36 inHg

Wind16.3 mph NW

Humidity34%

Visibility—

Dew point26°

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.