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As of 06:07 MDT

Weather in Opal, SD

60°Current weather

Opal, Sunday, 9 August, 06:07

Mostly clear. Feels like 59°. High 91°, low 60°.

Pressure29.88 inHg
Wind7.9 mph N
Humidity76%
Visibility6.2 mi
Dew point53°
Mon, 1097° / 66°0Mostly clear
97 °Mostly clear

Opal, Monday, 10 August

Mostly clear. High 97°, low 66°.

Pressure29.74 inHg
Wind11.4 mph SE
Humidity36%
Visibility6.2 mi
Dew point60°
Tue, 1191° / 64°0Mostly clear
91 °Mostly clear

Opal, Tuesday, 11 August

Mostly clear. High 91°, low 64°.

Pressure29.85 inHg
Wind11.7 mph E
Humidity39%
Visibility6.2 mi
Dew point57°
Wed, 1292° / 67°0.37Rain
92 °Rain

Opal, Wednesday, 12 August

Rain. High 92°, low 67°.

Pressure29.83 inHg
Wind10.8 mph SE
Humidity38%
Visibility6.2 mi
Dew point60°
Thu, 1371° / 63°0.09Light rain
71 °Light rain

Opal, Thursday, 13 August

Light rain. High 71°, low 63°.

Pressure29.97 inHg
Wind19.1 mph SE
Humidity65%
Visibility—
Dew point58°
Fri, 1465° / 60°0.01Light rain
65 °Light rain

Opal, Friday, 14 August

Light rain. High 65°, low 60°.

Pressure30.03 inHg
Wind19.1 mph SE
Humidity82%
Visibility—
Dew point58°
Sat, 1581° / 60°0.04Light rain
81 °Light rain

Opal, Saturday, 15 August

Light rain. High 81°, low 60°.

Pressure30.06 inHg
Wind12.5 mph NW
Humidity51%
Visibility—
Dew point56°
Sun, 1687° / 64°0.02Light rain
87 °Light rain

Opal, Sunday, 16 August

Light rain. High 87°, low 64°.

Pressure30.09 inHg
Wind16.2 mph SE
Humidity37%
Visibility—
Dew point51°
Mon, 1795° / 71°0.14Light rain
95 °Light rain

Opal, Monday, 17 August

Light rain. High 95°, low 71°.

Pressure29.83 inHg
Wind18.5 mph SE
Humidity36%
Visibility—
Dew point57°
Tue, 1895° / 75°0Overcast
95 °Overcast

Opal, Tuesday, 18 August

Overcast. High 95°, low 75°.

Pressure29.77 inHg
Wind11.5 mph NW
Humidity25%
Visibility—
Dew point50°
Wed, 1995° / 75°0.01Light rain
95 °Light rain

Opal, Wednesday, 19 August

Light rain. High 95°, low 75°.

Pressure29.80 inHg
Wind15.5 mph N
Humidity28%
Visibility—
Dew point52°
Thu, 2085° / 69°0.04Light rain
85 °Light rain

Opal, Thursday, 20 August

Light rain. High 85°, low 69°.

Pressure29.97 inHg
Wind15.6 mph SE
Humidity38%
Visibility—
Dew point51°
Fri, 2191° / 70°0.04Light rain
91 °Light rain

Opal, Friday, 21 August

Light rain. High 91°, low 70°.

Pressure29.77 inHg
Wind18.9 mph E
Humidity44%
Visibility—
Dew point60°
Sat, 2289° / 67°0.05Light rain
89 °Light rain

Opal, Saturday, 22 August

Light rain. High 89°, low 67°.

Pressure29.77 inHg
Wind15.4 mph E
Humidity48%
Visibility—
Dew point59°
Sun, 2375° / 65°0.55Rain
75 °Rain

Opal, Sunday, 23 August

Rain. High 75°, low 65°.

Pressure29.91 inHg
Wind12.9 mph E
Humidity83%
Visibility—
Dew point63°
Mon, 2477° / 64°0.07Light rain
77 °Light rain

Opal, Monday, 24 August

Light rain. High 77°, low 64°.

Pressure30.00 inHg
Wind13.7 mph SE
Humidity75%
Visibility—
Dew point62°

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 Opal, 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 Opal, 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.