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As of 14:33 MDT

Weather in Arpan, SD

98°Current weather

Arpan, Saturday, 8 August, 14:33

Clear. Feels like 93°. High 98°, low 66°.

Pressure29.65 inHg
Wind15.8 mph NW
Humidity14%
Visibility6.2 mi
Dew point41°
Sun, 0991° / 67°0Overcast
91 °Overcast

Arpan, Sunday, 9 August

Overcast. High 91°, low 67°.

Pressure29.80 inHg
Wind13.2 mph E
Humidity28%
Visibility6.2 mi
Dew point51°
Mon, 1099° / 67°0Clear
99 °Clear

Arpan, Monday, 10 August

Clear. High 99°, low 67°.

Pressure29.74 inHg
Wind7.2 mph E
Humidity27%
Visibility6.2 mi
Dew point53°
Tue, 1192° / 65°0.02Light rain
92 °Light rain

Arpan, Tuesday, 11 August

Light rain. High 92°, low 65°.

Pressure29.83 inHg
Wind12.3 mph E
Humidity32%
Visibility6.2 mi
Dew point54°
Wed, 1295° / 68°0.04Light rain
95 °Light rain

Arpan, Wednesday, 12 August

Light rain. High 95°, low 68°.

Pressure29.74 inHg
Wind9.6 mph E
Humidity28%
Visibility6.2 mi
Dew point52°
Thu, 1383° / 63°0.08Light rain
83 °Light rain

Arpan, Thursday, 13 August

Light rain. High 83°, low 63°.

Pressure30.00 inHg
Wind20.8 mph SE
Humidity44%
Visibility—
Dew point54°
Fri, 1499° / 67°0.22Rain
99 °Rain

Arpan, Friday, 14 August

Rain. High 99°, low 67°.

Pressure29.80 inHg
Wind23.4 mph SE
Humidity26%
Visibility—
Dew point51°
Sat, 1592° / 66°0Overcast
92 °Overcast

Arpan, Saturday, 15 August

Overcast. High 92°, low 66°.

Pressure30.00 inHg
Wind12.3 mph E
Humidity41%
Visibility—
Dew point56°
Sun, 1695° / 71°0Light rain
95 °Light rain

Arpan, Sunday, 16 August

Light rain. High 95°, low 71°.

Pressure29.94 inHg
Wind15.6 mph W
Humidity27%
Visibility—
Dew point50°
Mon, 1797° / 67°0.05Light rain
97 °Light rain

Arpan, Monday, 17 August

Light rain. High 97°, low 67°.

Pressure29.91 inHg
Wind14.7 mph SE
Humidity27%
Visibility—
Dew point51°
Tue, 1899° / 68°0Mostly clear
99 °Mostly clear

Arpan, Tuesday, 18 August

Mostly clear. High 99°, low 68°.

Pressure29.91 inHg
Wind24.9 mph NE
Humidity17%
Visibility—
Dew point40°
Wed, 1985° / 71°0.02Light rain
85 °Light rain

Arpan, Wednesday, 19 August

Light rain. High 85°, low 71°.

Pressure29.94 inHg
Wind15.9 mph E
Humidity45%
Visibility—
Dew point56°
Thu, 2090° / 65°0.01Light rain
90 °Light rain

Arpan, Thursday, 20 August

Light rain. High 90°, low 65°.

Pressure29.94 inHg
Wind14.7 mph SE
Humidity38%
Visibility—
Dew point53°
Fri, 21100° / 66°0Clear
100 °Clear

Arpan, Friday, 21 August

Clear. High 100°, low 66°.

Pressure29.80 inHg
Wind11.6 mph NE
Humidity26%
Visibility—
Dew point50°
Sat, 2282° / 60°0.03Light rain
82 °Light rain

Arpan, Saturday, 22 August

Light rain. High 82°, low 60°.

Pressure30.09 inHg
Wind19.3 mph E
Humidity42%
Visibility—
Dew point49°
Sun, 2390° / 62°0.16Rain
90 °Rain

Arpan, Sunday, 23 August

Rain. High 90°, low 62°.

Pressure30.00 inHg
Wind11.3 mph SE
Humidity43%
Visibility—
Dew point54°

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 Arpan, 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 Arpan, 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.