As of 17:33 MDT

Weather in Hermosa, SD

63°

Hermosa, Wednesday, 21 October, 17:33

Mostly clear. Feels like 61°. High 69°, low 44°.

Pressure30.15 inHg

Wind6.7 mph SE

Humidity52%

Visibility6.2 mi

Dew point45°

See detailed hourly forecast

Monthly outlook for Hermosa, SD: average high 58.1°, average low 42.7°. That is 1.8° above the climate normal for October. Precipitation is expected on 4 days (about 1.0 inches), against a normal of 3 days and 0.6 inches. The warmest day looks like 23 October (80.1°), the coolest 28 October (30.1°).

58.1°/42.7°

Average high / low

+1.8°

Above normal

4 / 3

Wet days / normal

1.0 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
21 October – 30 October	58.4°	56.6°	+1°
31 October – 9 November	57.5°	51°	+3.6°
10 November – 19 November	at normal	47°	—

October records over 66 years

90.3°3 October 2025All-time high

-4.2°26 October 2020All-time low

Thu, 2279° / 48°

79 °

Hermosa, Thursday, 22 October

Clear. High 79°, low 48°.

Pressure29.88 inHg

Wind10 mph SW

Humidity34%

Visibility6.2 mi

Dew point47°

Fri, 2380° / 57°

80 °

Hermosa, Friday, 23 October

Overcast. High 80°, low 57°.

Pressure29.65 inHg

Wind6.5 mph S

Humidity40%

Visibility6.2 mi

Dew point51°

Sat, 2460° / 42°

60 °

Hermosa, Saturday, 24 October

Overcast. High 60°, low 42°.

Pressure30.36 inHg

Wind10 mph N

Humidity48%

Visibility6.2 mi

Dew point32°

Sun, 2544° / 37°

0.32

44 °

Hermosa, Sunday, 25 October

Rain. High 44°, low 37°.

Pressure30.39 inHg

Wind5.4 mph NE

Humidity96%

Visibility4.9 mi

Dew point37°

Mon, 2641° / 35°

0.01

41 °

Hermosa, Monday, 26 October

Light rain. High 41°, low 35°.

Pressure30.50 inHg

Wind6.2 mph N

Humidity79%

Visibility—

Dew point32°

Tue, 2741° / 33°

41 °

Hermosa, Tuesday, 27 October

Light snow. High 41°, low 33°.

Pressure30.30 inHg

Wind8.9 mph N

Humidity87%

Visibility—

Dew point35°

Wed, 2848° / 30°

48 °

Hermosa, Wednesday, 28 October

Clear. High 48°, low 30°.

Pressure30.42 inHg

Wind6 mph W

Humidity44%

Visibility—

Dew point21°

Thu, 2954° / 33°

54 °

Hermosa, Thursday, 29 October

Overcast. High 54°, low 33°.

Pressure30.15 inHg

Wind19.8 mph S

Humidity45%

Visibility—

Dew point26°

Fri, 3068° / 44°

68 °

Hermosa, Friday, 30 October

Clear. High 68°, low 44°.

Pressure29.77 inHg

Wind7.7 mph E

Humidity24%

Visibility—

Dew point24°

Sat, 3161° / 47°

61 °

Hermosa, Saturday, 31 October

Overcast. High 61°, low 47°.

Pressure29.83 inHg

Wind7.4 mph E

Humidity29%

Visibility—

Dew point27°

Sun, 0152° / 46°

0.46

52 °

Hermosa, Sunday, 1 November

Rain. High 52°, low 46°.

Pressure29.97 inHg

Wind8.8 mph N

Humidity96%

Visibility—

Dew point46°

Mon, 0251° / 49°

0.09

51 °

Hermosa, Monday, 2 November

Light rain. High 51°, low 49°.

Pressure30.09 inHg

Wind5.5 mph N

Humidity92%

Visibility—

Dew point48°

Tue, 0355° / 46°

0.11

55 °

Hermosa, Tuesday, 3 November

Light rain. High 55°, low 46°.

Pressure30.30 inHg

Wind8.7 mph S

Humidity74%

Visibility—

Dew point43°

Wed, 0464° / 44°

64 °

Hermosa, Wednesday, 4 November

Clear. High 64°, low 44°.

Pressure30.00 inHg

Wind10.2 mph S

Humidity46%

Visibility—

Dew point39°

Thu, 0561° / 47°

61 °

Hermosa, Thursday, 5 November

Clear. High 61°, low 47°.

Pressure30.03 inHg

Wind6 mph E

Humidity43%

Visibility—

Dew point35°

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

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)

Tue, 1746° / 28°

0.02

46 °

Hermosa, Tuesday, 17 November

Climate normal for this date — 60-year average.

Average high46°

Average low28°

Average precipitation0.02 in

Chance of precipitation18%

Record high67° (1999)

Record low-1° (2000)

Wed, 1846° / 28°

0.03

46 °

Hermosa, Wednesday, 18 November

Climate normal for this date — 60-year average.

Average high46°

Average low28°

Average precipitation0.03 in

Chance of precipitation18%

Record high70° (2008)

Record low1° (2014)

Thu, 1945° / 28°

0.03

45 °

Hermosa, Thursday, 19 November

Climate normal for this date — 60-year average.

Average high45°

Average low28°

Average precipitation0.03 in

Chance of precipitation12%

Record high66° (1989)

Record low-3° (1985)

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.