As of 10:38 MDT

Weather in Harney, SD

70°Current weather

Harney, Saturday, 17 October, 10:38

Clear. Feels like 68°. High 75°, low 41°.

Pressure30.06 inHg
Wind1.5 mph SW
Humidity18%
Visibility6.2 mi
Dew point26°

Monthly outlook for Harney, SD: average high 59.2°, average low 39.8°. That is 1.2° above the climate normal for October. Precipitation is expected on 2 days (about 0.8 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 17 October (75.2°), the coolest 31 October (28.1°).

59.2°/39.8°
Average high / low
+1.2°
Above normal
2 / 3
Wet days / normal
0.8 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
17 October – 26 October64.3°59°+2.9°
27 October – 5 November50.6°52.9°-1.3°
6 November – 15 Novemberat normal48.3°—

October records over 66 years

90.3°3 October 2025All-time high
-4.2°26 October 2020All-time low

Climate normals and records are computed from the nearest reference point — Hermosa (10 mi).

Sun, 1862° / 43°0Clear
62 °Clear

Harney, Sunday, 18 October

Clear. High 62°, low 43°.

Pressure30.09 inHg
Wind9.7 mph N
Humidity34%
Visibility6.2 mi
Dew point33°
Mon, 1957° / 38°0Mostly clear
57 °Mostly clear

Harney, Monday, 19 October

Mostly clear. High 57°, low 38°.

Pressure30.12 inHg
Wind6 mph SE
Humidity55%
Visibility6.2 mi
Dew point39°
Tue, 2072° / 47°0Clear
72 °Clear

Harney, Tuesday, 20 October

Clear. High 72°, low 47°.

Pressure29.91 inHg
Wind4.5 mph SE
Humidity37%
Visibility6.2 mi
Dew point43°
Wed, 2163° / 42°0Clear
63 °Clear

Harney, Wednesday, 21 October

Clear. High 63°, low 42°.

Pressure30.12 inHg
Wind7.3 mph SE
Humidity50%
Visibility—
Dew point41°
Thu, 2271° / 49°0Overcast
71 °Overcast

Harney, Thursday, 22 October

Overcast. High 71°, low 49°.

Pressure29.91 inHg
Wind12.5 mph S
Humidity47%
Visibility—
Dew point47°
Fri, 2375° / 54°0.02Light rain
75 °Light rain

Harney, Friday, 23 October

Light rain. High 75°, low 54°.

Pressure29.50 inHg
Wind19.9 mph W
Humidity33%
Visibility—
Dew point41°
Sat, 2451° / 37°0.02Light rain
51 °Light rain

Harney, Saturday, 24 October

Light rain. High 51°, low 37°.

Pressure29.91 inHg
Wind21.4 mph NW
Humidity65%
Visibility—
Dew point31°
Sun, 2558° / 34°0Overcast
58 °Overcast

Harney, Sunday, 25 October

Overcast. High 58°, low 34°.

Pressure29.97 inHg
Wind13.4 mph S
Humidity45%
Visibility—
Dew point28°
Mon, 2658° / 44°0Overcast
58 °Overcast

Harney, Monday, 26 October

Overcast. High 58°, low 44°.

Pressure29.62 inHg
Wind17.3 mph W
Humidity25%
Visibility—
Dew point21°
Tue, 2766° / 45°0Overcast
66 °Overcast

Harney, Tuesday, 27 October

Overcast. High 66°, low 45°.

Pressure29.50 inHg
Wind29.9 mph W
Humidity25%
Visibility—
Dew point23°
Wed, 2851° / 38°0.01Light rain
51 °Light rain

Harney, Wednesday, 28 October

Light rain. High 51°, low 38°.

Pressure29.91 inHg
Wind20 mph NW
Humidity22%
Visibility—
Dew point11°
Thu, 2961° / 38°0Partly cloudy
61 °Partly cloudy

Harney, Thursday, 29 October

Partly cloudy. High 61°, low 38°.

Pressure29.62 inHg
Wind18.2 mph SW
Humidity23%
Visibility—
Dew point20°
Fri, 3044° / 29°0.68Snow
44 °Snow

Harney, Friday, 30 October

Snow. High 44°, low 29°.

Pressure29.41 inHg
Wind26.1 mph N
Humidity97%
Visibility—
Dew point32°
Sat, 3138° / 28°0.06Light snow
38 °Light snow

Harney, Saturday, 31 October

Light snow. High 38°, low 28°.

Pressure29.85 inHg
Wind27.6 mph NW
Humidity72%
Visibility—
Dew point28°
Sun, 0143° / 29°0Clear
43 °Clear

Harney, Sunday, 1 November

Clear. High 43°, low 29°.

Pressure29.85 inHg
Wind10.9 mph SW
Humidity63%
Visibility—
Dew point30°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0251° / 32°0.04Climate normal
51 °Climate normal

Harney, Monday, 2 November

Climate normal for this date — 60-year average.

Average high51°
Average low32°
Average precipitation0.04 in
Chance of precipitation20%
Record high75° (2008)
Record low-2° (1991)
Tue, 0351° / 33°0.04Climate normal
51 °Climate normal

Harney, 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°0.01Climate normal
53 °Climate normal

Harney, 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°0.03Climate normal
52 °Climate normal

Harney, 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°0.04Climate normal
51 °Climate normal

Harney, 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°0.03Climate normal
52 °Climate normal

Harney, 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°0.06Climate normal
50 °Climate normal

Harney, 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°0.06Climate normal
46 °Climate normal

Harney, 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°0.04Climate normal
47 °Climate normal

Harney, 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°0.02Climate normal
45 °Climate normal

Harney, 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°0.03Climate normal
48 °Climate normal

Harney, 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°0.04Climate normal
48 °Climate normal

Harney, 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°0.02Climate normal
48 °Climate normal

Harney, 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°0.02Climate normal
48 °Climate normal

Harney, 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)

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 Harney, 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 Harney, 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.