As of 07:03 MDT

Weather in Hermosa, SD

66°

Hermosa, Sunday, 9 August, 07:03

Partly cloudy. Feels like 65°. High 92°, low 66°.

Pressure29.97 inHg

Wind6.2 mph NW

Humidity49%

Visibility6.2 mi

Dew point45°

See detailed hourly forecast

Monthly outlook for Hermosa, SD: average high 90.2°, average low 67°. That is 4.1° above the climate normal for August. Precipitation is expected on 5 days (about 2.7 inches), against a normal of 5 days and 1.1 inches. The warmest day looks like 12 August (100°), the coolest 14 August (61.9°).

90.2°/67°

Average high / low

+4.1°

Above normal

5 / 5

Wet days / normal

2.7 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
9 August – 18 August	87.8°	82.7°	+2.8°
19 August – 28 August	94.2°	82.7°	+6.4°
29 August – 7 September	at normal	80.6°	—

August records over 66 years

102.7°29 August 2012All-time high

41°23 August 1966All-time low

Mon, 1099° / 65°

99 °

Hermosa, Monday, 10 August

Partly cloudy. High 99°, low 65°.

Pressure29.77 inHg

Wind9.9 mph SE

Humidity27%

Visibility6.2 mi

Dew point50°

Tue, 1193° / 65°

93 °

Hermosa, Tuesday, 11 August

Mostly clear. High 93°, low 65°.

Pressure29.80 inHg

Wind8.5 mph E

Humidity38%

Visibility6.2 mi

Dew point56°

Wed, 12100° / 67°

0.02

100 °

Hermosa, Wednesday, 12 August

Light rain. High 100°, low 67°.

Pressure29.77 inHg

Wind8.5 mph SE

Humidity33%

Visibility6.2 mi

Dew point56°

Thu, 1371° / 63°

0.04

71 °

Hermosa, Thursday, 13 August

Light rain. High 71°, low 63°.

Pressure29.97 inHg

Wind10.6 mph E

Humidity83%

Visibility—

Dew point61°

Fri, 1467° / 62°

0.33

67 °

Hermosa, Friday, 14 August

Rain. High 67°, low 62°.

Pressure29.97 inHg

Wind11 mph SE

Humidity96%

Visibility—

Dew point62°

Sat, 1582° / 62°

0.06

82 °

Hermosa, Saturday, 15 August

Light rain. High 82°, low 62°.

Pressure30.06 inHg

Wind8.6 mph N

Humidity60%

Visibility—

Dew point59°

Sun, 1687° / 64°

2.18

87 °

Hermosa, Sunday, 16 August

Heavy rain. High 87°, low 64°.

Pressure30.12 inHg

Wind20.8 mph E

Humidity44%

Visibility—

Dew point56°

Mon, 1795° / 65°

0.06

95 °

Hermosa, Monday, 17 August

Light rain. High 95°, low 65°.

Pressure29.80 inHg

Wind12.3 mph SW

Humidity38%

Visibility—

Dew point57°

Tue, 1891° / 73°

91 °

Hermosa, Tuesday, 18 August

Mostly clear. High 91°, low 73°.

Pressure29.88 inHg

Wind17.6 mph NW

Humidity20%

Visibility—

Dew point42°

Wed, 1987° / 66°

87 °

Hermosa, Wednesday, 19 August

Clear. High 87°, low 66°.

Pressure29.97 inHg

Wind12.8 mph SE

Humidity35%

Visibility—

Dew point50°

Thu, 20100° / 69°

100 °

Hermosa, Thursday, 20 August

Clear. High 100°, low 69°.

Pressure29.80 inHg

Wind13.3 mph NW

Humidity11%

Visibility—

Dew point31°

Fri, 2197° / 76°

97 °

Hermosa, Friday, 21 August

Overcast. High 97°, low 76°.

Pressure29.74 inHg

Wind21.1 mph N

Humidity12%

Visibility—

Dew point34°

Sat, 2287° / 66°

87 °

Hermosa, Saturday, 22 August

Clear. High 87°, low 66°.

Pressure30.06 inHg

Wind12.9 mph E

Humidity32%

Visibility—

Dew point46°

Sun, 2395° / 69°

95 °

Hermosa, Sunday, 23 August

Overcast. High 95°, low 69°.

Pressure29.94 inHg

Wind8.4 mph E

Humidity28%

Visibility—

Dew point48°

Mon, 24100° / 74°

100 °

Hermosa, Monday, 24 August

Clear. High 100°, low 74°.

Pressure29.94 inHg

Wind12.9 mph NE

Humidity14%

Visibility—

Dew point37°

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

Tue, 2582° / 60°

0.04

82 °

Hermosa, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high82°

Average low60°

Average precipitation0.04 in

Chance of precipitation22%

Record high98° (2020)

Record low46° (1964)

Wed, 2682° / 60°

0.12

82 °

Hermosa, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high82°

Average low60°

Average precipitation0.12 in

Chance of precipitation42%

Record high100° (1970)

Record low48° (1992)

Thu, 2783° / 60°

0.07

83 °

Hermosa, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high83°

Average low60°

Average precipitation0.07 in

Chance of precipitation23%

Record high101° (2010)

Record low45° (1987)

Fri, 2882° / 60°

0.04

82 °

Hermosa, Friday, 28 August

Climate normal for this date — 60-year average.

Average high82°

Average low60°

Average precipitation0.04 in

Chance of precipitation18%

Record high96° (1969)

Record low46° (1987)

Sat, 2982° / 59°

0.06

82 °

Hermosa, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high82°

Average low59°

Average precipitation0.06 in

Chance of precipitation30%

Record high103° (2012)

Record low49° (1988)

Sun, 3082° / 59°

0.04

82 °

Hermosa, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high82°

Average low59°

Average precipitation0.04 in

Chance of precipitation28%

Record high96° (1989)

Record low43° (1992)

Mon, 3180° / 59°

0.04

80 °

Hermosa, Monday, 31 August

Climate normal for this date — 60-year average.

Average high80°

Average low59°

Average precipitation0.04 in

Chance of precipitation18%

Record high99° (1960)

Record low44° (1962)

Tue, 0180° / 58°

0.07

80 °

Hermosa, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high80°

Average low58°

Average precipitation0.07 in

Chance of precipitation22%

Record high97° (2012)

Record low44° (1965)

Wed, 0281° / 59°

0.07

81 °

Hermosa, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high81°

Average low59°

Average precipitation0.07 in

Chance of precipitation20%

Record high98° (1960)

Record low41° (1974)

Thu, 0381° / 58°

0.03

81 °

Hermosa, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high81°

Average low58°

Average precipitation0.03 in

Chance of precipitation23%

Record high97° (2017)

Record low40° (1974)

Fri, 0480° / 58°

0.07

80 °

Hermosa, Friday, 4 September

Climate normal for this date — 60-year average.

Average high80°

Average low58°

Average precipitation0.07 in

Chance of precipitation28%

Record high99° (1960)

Record low41° (1968)

Sat, 0580° / 58°

0.05

80 °

Hermosa, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high80°

Average low58°

Average precipitation0.05 in

Chance of precipitation23%

Record high99° (2020)

Record low38° (1968)

Sun, 0680° / 56°

0.03

80 °

Hermosa, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high80°

Average low56°

Average precipitation0.03 in

Chance of precipitation22%

Record high97° (1978)

Record low39° (2025)

Mon, 0778° / 56°

0.05

78 °

Hermosa, Monday, 7 September

Climate normal for this date — 60-year average.

Average high78°

Average low56°

Average precipitation0.05 in

Chance of precipitation25%

Record high97° (2022)

Record low39° (2020)

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.