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As of 19:12 MDT

Weather in Summerville, SD

90°Current weather

Summerville, Saturday, 8 August, 19:12

Mostly clear. Feels like 87°. High 95°, low 60°.

Pressure29.65 inHg
Wind14.5 mph NW
Humidity27%
Visibility6.2 mi
Dew point50°
Sun, 0989° / 60°0Overcast
89 °Overcast

Summerville, Sunday, 9 August

Overcast. High 89°, low 60°.

Pressure29.85 inHg
Wind13.6 mph E
Humidity25%
Visibility6.2 mi
Dew point45°
Mon, 1099° / 63°0.04Light rain
99 °Light rain

Summerville, Monday, 10 August

Light rain. High 99°, low 63°.

Pressure29.77 inHg
Wind4.6 mph E
Humidity34%
Visibility6.2 mi
Dew point59°
Tue, 1192° / 61°0Mostly clear
92 °Mostly clear

Summerville, Tuesday, 11 August

Mostly clear. High 92°, low 61°.

Pressure29.88 inHg
Wind11.3 mph E
Humidity29%
Visibility6.2 mi
Dew point50°
Wed, 1290° / 65°1.02Heavy rain
90 °Heavy rain

Summerville, Wednesday, 12 August

Heavy rain. High 90°, low 65°.

Pressure29.85 inHg
Wind9.7 mph SE
Humidity37%
Visibility6.2 mi
Dew point58°
Thu, 1383° / 63°0.04Light rain
83 °Light rain

Summerville, Thursday, 13 August

Light rain. High 83°, low 63°.

Pressure29.97 inHg
Wind14 mph SE
Humidity59%
Visibility—
Dew point57°
Fri, 1482° / 63°0.04Light rain
82 °Light rain

Summerville, Friday, 14 August

Light rain. High 82°, low 63°.

Pressure30.00 inHg
Wind19.4 mph SE
Humidity45%
Visibility—
Dew point51°
Sat, 1585° / 67°0.24Rain
85 °Rain

Summerville, Saturday, 15 August

Rain. High 85°, low 67°.

Pressure30.09 inHg
Wind8.7 mph SE
Humidity53%
Visibility—
Dew point59°
Sun, 1675° / 62°0.13Light rain
75 °Light rain

Summerville, Sunday, 16 August

Light rain. High 75°, low 62°.

Pressure30.15 inHg
Wind10.8 mph E
Humidity81%
Visibility—
Dew point56°
Mon, 1796° / 62°0Partly cloudy
96 °Partly cloudy

Summerville, Monday, 17 August

Partly cloudy. High 96°, low 62°.

Pressure29.91 inHg
Wind13.9 mph NW
Humidity41%
Visibility—
Dew point57°
Tue, 1884° / 62°0.03Light rain
84 °Light rain

Summerville, Tuesday, 18 August

Light rain. High 84°, low 62°.

Pressure29.97 inHg
Wind20.3 mph N
Humidity29%
Visibility—
Dew point46°
Wed, 1979° / 58°0Partly cloudy
79 °Partly cloudy

Summerville, Wednesday, 19 August

Partly cloudy. High 79°, low 58°.

Pressure30.12 inHg
Wind11.1 mph SE
Humidity38%
Visibility—
Dew point45°
Thu, 2079° / 61°0.09Light rain
79 °Light rain

Summerville, Thursday, 20 August

Light rain. High 79°, low 61°.

Pressure29.97 inHg
Wind16.3 mph S
Humidity57%
Visibility—
Dew point56°
Fri, 2183° / 61°0.78Heavy rain
83 °Heavy rain

Summerville, Friday, 21 August

Heavy rain. High 83°, low 61°.

Pressure29.65 inHg
Wind15.2 mph NW
Humidity44%
Visibility—
Dew point56°
Sat, 2279° / 61°0Clear
79 °Clear

Summerville, Saturday, 22 August

Clear. High 79°, low 61°.

Pressure29.85 inHg
Wind19.2 mph N
Humidity34%
Visibility—
Dew point44°
Sun, 2385° / 59°0Clear
85 °Clear

Summerville, Sunday, 23 August

Clear. High 85°, low 59°.

Pressure29.88 inHg
Wind15.2 mph SE
Humidity25%
Visibility—
Dew point38°

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 Summerville, 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 Summerville, 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.