EN
English Español

As of 13:52 MDT

Weather in Keystone, SD

93°Current weather

Keystone, Saturday, 8 August, 13:52

Mostly clear. Feels like 89°. High 93°, low 60°.

Pressure29.71 inHg
Wind7.2 mph NW
Humidity19%
Visibility6.2 mi
Dew point45°
Sun, 0986° / 63°0Overcast
86 °Overcast

Keystone, Sunday, 9 August

Overcast. High 86°, low 63°.

Pressure29.83 inHg
Wind11.9 mph E
Humidity25%
Visibility6.2 mi
Dew point45°
Mon, 1096° / 61°0Mostly clear
96 °Mostly clear

Keystone, Monday, 10 August

Mostly clear. High 96°, low 61°.

Pressure29.77 inHg
Wind10.6 mph E
Humidity24%
Visibility6.2 mi
Dew point48°
Tue, 1187° / 62°0.02Light rain
87 °Light rain

Keystone, Tuesday, 11 August

Light rain. High 87°, low 62°.

Pressure29.85 inHg
Wind10.6 mph E
Humidity35%
Visibility6.2 mi
Dew point53°
Wed, 1288° / 62°0.03Light rain
88 °Light rain

Keystone, Wednesday, 12 August

Light rain. High 88°, low 62°.

Pressure29.77 inHg
Wind13.7 mph SE
Humidity27%
Visibility6.2 mi
Dew point51°
Thu, 1373° / 57°0.03Light rain
73 °Light rain

Keystone, Thursday, 13 August

Light rain. High 73°, low 57°.

Pressure30.06 inHg
Wind12.3 mph SE
Humidity77%
Visibility—
Dew point56°
Fri, 1488° / 61°0.01Light rain
88 °Light rain

Keystone, Friday, 14 August

Light rain. High 88°, low 61°.

Pressure29.91 inHg
Wind18.3 mph S
Humidity41%
Visibility—
Dew point53°
Sat, 1583° / 61°0Overcast
83 °Overcast

Keystone, Saturday, 15 August

Overcast. High 83°, low 61°.

Pressure30.03 inHg
Wind10.9 mph NE
Humidity39%
Visibility—
Dew point51°
Sun, 1691° / 66°0Clear
91 °Clear

Keystone, Sunday, 16 August

Clear. High 91°, low 66°.

Pressure29.94 inHg
Wind10.2 mph NE
Humidity20%
Visibility—
Dew point42°
Mon, 1789° / 66°0.01Light rain
89 °Light rain

Keystone, Monday, 17 August

Light rain. High 89°, low 66°.

Pressure29.97 inHg
Wind12.4 mph SE
Humidity31%
Visibility—
Dew point50°
Tue, 1891° / 68°0Clear
91 °Clear

Keystone, Tuesday, 18 August

Clear. High 91°, low 68°.

Pressure29.97 inHg
Wind13.8 mph SE
Humidity20%
Visibility—
Dew point40°
Wed, 1980° / 62°0.01Light rain
80 °Light rain

Keystone, Wednesday, 19 August

Light rain. High 80°, low 62°.

Pressure29.91 inHg
Wind16.6 mph NE
Humidity37%
Visibility—
Dew point50°
Thu, 2083° / 56°0.02Light rain
83 °Light rain

Keystone, Thursday, 20 August

Light rain. High 83°, low 56°.

Pressure29.97 inHg
Wind11.3 mph S
Humidity40%
Visibility—
Dew point50°
Fri, 2190° / 64°0Mostly clear
90 °Mostly clear

Keystone, Friday, 21 August

Mostly clear. High 90°, low 64°.

Pressure29.85 inHg
Wind11.5 mph NE
Humidity29%
Visibility—
Dew point47°
Sat, 2272° / 58°0.07Light rain
72 °Light rain

Keystone, Saturday, 22 August

Light rain. High 72°, low 58°.

Pressure30.12 inHg
Wind10 mph SE
Humidity48%
Visibility—
Dew point48°
Sun, 2383° / 58°0.22Rain
83 °Rain

Keystone, Sunday, 23 August

Rain. High 83°, low 58°.

Pressure30.00 inHg
Wind8.2 mph E
Humidity37%
Visibility—
Dew point51°

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 Keystone, 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 Keystone, 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.