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As of 00:31 MDT

Weather in Castle Rock, SD

72°Current weather

Castle Rock, Sunday, 9 August, 00:31

Clear. Feels like 71°. High 91°, low 64°.

Pressure29.80 inHg
Wind5.2 mph N
Humidity29%
Visibility6.2 mi
Dew point38°
Mon, 1096° / 66°0Clear
96 °Clear

Castle Rock, Monday, 10 August

Clear. High 96°, low 66°.

Pressure29.74 inHg
Wind9.4 mph SE
Humidity24%
Visibility6.2 mi
Dew point50°
Tue, 1190° / 63°0.01Light rain
90 °Light rain

Castle Rock, Tuesday, 11 August

Light rain. High 90°, low 63°.

Pressure29.85 inHg
Wind13.4 mph E
Humidity39%
Visibility6.2 mi
Dew point57°
Wed, 1292° / 65°0.14Rain
92 °Rain

Castle Rock, Wednesday, 12 August

Rain. High 92°, low 65°.

Pressure29.80 inHg
Wind18.3 mph SE
Humidity35%
Visibility6.2 mi
Dew point57°
Thu, 1378° / 62°0.72Heavy rain
78 °Heavy rain

Castle Rock, Thursday, 13 August

Heavy rain. High 78°, low 62°.

Pressure29.94 inHg
Wind25 mph SE
Humidity55%
Visibility—
Dew point55°
Fri, 1480° / 64°0.15Light rain
80 °Light rain

Castle Rock, Friday, 14 August

Light rain. High 80°, low 64°.

Pressure29.94 inHg
Wind22 mph SE
Humidity55%
Visibility—
Dew point57°
Sat, 1582° / 63°0.07Light rain
82 °Light rain

Castle Rock, Saturday, 15 August

Light rain. High 82°, low 63°.

Pressure30.09 inHg
Wind12 mph SW
Humidity53%
Visibility—
Dew point56°
Sun, 1681° / 68°0.04Light rain
81 °Light rain

Castle Rock, Sunday, 16 August

Light rain. High 81°, low 68°.

Pressure30.03 inHg
Wind14.8 mph SE
Humidity55%
Visibility—
Dew point58°
Mon, 1794° / 64°0Partly cloudy
94 °Partly cloudy

Castle Rock, Monday, 17 August

Partly cloudy. High 94°, low 64°.

Pressure29.91 inHg
Wind12.9 mph N
Humidity36%
Visibility—
Dew point54°
Tue, 1889° / 64°0.02Light rain
89 °Light rain

Castle Rock, Tuesday, 18 August

Light rain. High 89°, low 64°.

Pressure29.91 inHg
Wind22.7 mph NE
Humidity25%
Visibility—
Dew point44°
Wed, 1978° / 58°0.01Light rain
78 °Light rain

Castle Rock, Wednesday, 19 August

Light rain. High 78°, low 58°.

Pressure30.09 inHg
Wind21.5 mph SE
Humidity44%
Visibility—
Dew point48°
Thu, 2081° / 62°0.19Light rain
81 °Light rain

Castle Rock, Thursday, 20 August

Light rain. High 81°, low 62°.

Pressure29.91 inHg
Wind19.4 mph SE
Humidity57%
Visibility—
Dew point58°
Fri, 2179° / 66°0.02Light rain
79 °Light rain

Castle Rock, Friday, 21 August

Light rain. High 79°, low 66°.

Pressure29.68 inHg
Wind23.9 mph NW
Humidity47%
Visibility—
Dew point55°
Sat, 2281° / 64°0Clear
81 °Clear

Castle Rock, Saturday, 22 August

Clear. High 81°, low 64°.

Pressure29.91 inHg
Wind16.4 mph N
Humidity37%
Visibility—
Dew point46°
Sun, 2388° / 61°0Clear
88 °Clear

Castle Rock, Sunday, 23 August

Clear. High 88°, low 61°.

Pressure29.85 inHg
Wind19.3 mph SE
Humidity26%
Visibility—
Dew point41°
Mon, 2492° / 68°0Partly cloudy
92 °Partly cloudy

Castle Rock, Monday, 24 August

Partly cloudy. High 92°, low 68°.

Pressure29.80 inHg
Wind16.7 mph NW
Humidity14%
Visibility—
Dew point33°

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 Castle Rock, 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 Castle Rock, 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.