As of 21:27 MDT

Weather in Hermosa, SD

47°

Hermosa, Sunday, 18 October, 21:27

Mostly clear. Feels like 47°. High 67°, low 46°.

Pressure30.24 inHg

Wind1 mph NW

Humidity52%

Visibility6.2 mi

Dew point30°

See detailed hourly forecast

Monthly outlook for Hermosa, SD: average high 63.6°, average low 41.8°. That is 4° above the climate normal for October. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 22 October (78.9°), the coolest 31 October (30.4°).

63.6°/41.8°

Average high / low

+4°

Above normal

1 / 3

Wet days / normal

0.1 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
18 October – 27 October	66°	58.5°	+4.1°
28 October – 6 November	59.7°	52.5°	+4°
7 November – 16 November	at normal	48.1°	—

October records over 66 years

90.3°3 October 2025All-time high

-4.2°26 October 2020All-time low

Mon, 1963° / 40°

63 °

Hermosa, Monday, 19 October

Clear. High 63°, low 40°.

Pressure30.18 inHg

Wind6.3 mph SE

Humidity47%

Visibility6.2 mi

Dew point36°

Tue, 2075° / 41°

75 °

Hermosa, Tuesday, 20 October

Clear. High 75°, low 41°.

Pressure29.97 inHg

Wind7.4 mph SE

Humidity39%

Visibility6.2 mi

Dew point44°

Wed, 2166° / 49°

66 °

Hermosa, Wednesday, 21 October

Clear. High 66°, low 49°.

Pressure30.21 inHg

Wind3.7 mph E

Humidity61%

Visibility6.2 mi

Dew point49°

Thu, 2279° / 52°

79 °

Hermosa, Thursday, 22 October

Mostly clear. High 79°, low 52°.

Pressure29.94 inHg

Wind10.9 mph SE

Humidity52%

Visibility6.2 mi

Dew point54°

Fri, 2378° / 56°

78 °

Hermosa, Friday, 23 October

Overcast. High 78°, low 56°.

Pressure29.65 inHg

Wind15.2 mph W

Humidity62%

Visibility—

Dew point55°

Sat, 2463° / 42°

0.09

63 °

Hermosa, Saturday, 24 October

Light rain. High 63°, low 42°.

Pressure30.03 inHg

Wind14.5 mph W

Humidity51%

Visibility—

Dew point37°

Sun, 2552° / 35°

52 °

Hermosa, Sunday, 25 October

Mostly clear. High 52°, low 35°.

Pressure30.21 inHg

Wind10.2 mph SE

Humidity35%

Visibility—

Dew point19°

Mon, 2654° / 37°

54 °

Hermosa, Monday, 26 October

Mostly clear. High 54°, low 37°.

Pressure30.12 inHg

Wind12.9 mph N

Humidity39%

Visibility—

Dew point25°

Tue, 2763° / 37°

63 °

Hermosa, Tuesday, 27 October

Clear. High 63°, low 37°.

Pressure29.94 inHg

Wind22.4 mph S

Humidity34%

Visibility—

Dew point26°

Wed, 2875° / 45°

75 °

Hermosa, Wednesday, 28 October

Partly cloudy. High 75°, low 45°.

Pressure29.62 inHg

Wind18.6 mph SW

Humidity18%

Visibility—

Dew point25°

Thu, 2966° / 44°

66 °

Hermosa, Thursday, 29 October

Overcast. High 66°, low 44°.

Pressure29.23 inHg

Wind22.1 mph W

Humidity40%

Visibility—

Dew point38°

Fri, 3046° / 35°

46 °

Hermosa, Friday, 30 October

Overcast. High 46°, low 35°.

Pressure29.74 inHg

Wind24.8 mph W

Humidity35%

Visibility—

Dew point17°

Sat, 3153° / 30°

53 °

Hermosa, Saturday, 31 October

Overcast. High 53°, low 30°.

Pressure29.97 inHg

Wind13.4 mph W

Humidity22%

Visibility—

Dew point10°

Sun, 0155° / 37°

55 °

Hermosa, Sunday, 1 November

Overcast. High 55°, low 37°.

Pressure29.85 inHg

Wind18.1 mph NW

Humidity32%

Visibility—

Dew point22°

Mon, 0263° / 41°

63 °

Hermosa, Monday, 2 November

Overcast. High 63°, low 41°.

Pressure29.56 inHg

Wind28.2 mph SW

Humidity20%

Visibility—

Dew point18°

From day 17 onward the outlook is built from 60-year climate statistics

Tue, 0351° / 33°

0.04

51 °

Hermosa, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high51°

Average low33°

Average precipitation0.04 in

Chance of precipitation20%

Record high71° (2020)

Record low2° (1991)

Wed, 0453° / 32°

0.01

53 °

Hermosa, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high53°

Average low32°

Average precipitation0.01 in

Chance of precipitation10%

Record high76° (1978)

Record low7° (1995)

Thu, 0552° / 33°

0.03

52 °

Hermosa, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high52°

Average low33°

Average precipitation0.03 in

Chance of precipitation13%

Record high76° (2020)

Record low1° (2003)

Fri, 0651° / 32°

0.04

51 °

Hermosa, Friday, 6 November

Climate normal for this date — 60-year average.

Average high51°

Average low32°

Average precipitation0.04 in

Chance of precipitation13%

Record high75° (2020)

Record low-3° (2003)

Sat, 0752° / 32°

0.03

52 °

Hermosa, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high52°

Average low32°

Average precipitation0.03 in

Chance of precipitation13%

Record high75° (1999)

Record low3° (1991)

Sun, 0850° / 31°

0.06

50 °

Hermosa, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high50°

Average low31°

Average precipitation0.06 in

Chance of precipitation20%

Record high77° (1999)

Record low3° (2003)

Mon, 0946° / 29°

0.06

46 °

Hermosa, Monday, 9 November

Climate normal for this date — 60-year average.

Average high46°

Average low29°

Average precipitation0.06 in

Chance of precipitation25%

Record high74° (2016)

Record low-3° (1966)

Tue, 1047° / 27°

0.04

47 °

Hermosa, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high47°

Average low27°

Average precipitation0.04 in

Chance of precipitation17%

Record high69° (2005)

Record low-7° (1986)

Wed, 1145° / 27°

0.02

45 °

Hermosa, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high45°

Average low27°

Average precipitation0.02 in

Chance of precipitation18%

Record high72° (2005)

Record low-7° (1986)

Thu, 1248° / 28°

0.03

48 °

Hermosa, Thursday, 12 November

Climate normal for this date — 60-year average.

Average high48°

Average low28°

Average precipitation0.03 in

Chance of precipitation15%

Record high73° (1999)

Record low-8° (1986)

Fri, 1348° / 29°

0.04

48 °

Hermosa, Friday, 13 November

Climate normal for this date — 60-year average.

Average high48°

Average low29°

Average precipitation0.04 in

Chance of precipitation22%

Record high73° (1999)

Record low-16° (1986)

Sat, 1448° / 30°

0.02

48 °

Hermosa, Saturday, 14 November

Climate normal for this date — 60-year average.

Average high48°

Average low30°

Average precipitation0.02 in

Chance of precipitation13%

Record high74° (2025)

Record low1° (1978)

Sun, 1548° / 29°

0.02

48 °

Hermosa, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high48°

Average low29°

Average precipitation0.02 in

Chance of precipitation13%

Record high71° (2021)

Record low1° (2014)

Mon, 1649° / 29°

0.02

49 °

Hermosa, Monday, 16 November

Climate normal for this date — 60-year average.

Average high49°

Average low29°

Average precipitation0.02 in

Chance of precipitation8%

Record high70° (2001)

Record low-8° (2014)

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 Hermosa, 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 Hermosa, 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.