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As of 03:03 MDT

Weather in Sourdough, MT

59°Current weather

Sourdough, Sunday, 9 August, 03:03

Mostly clear. Feels like 57°. High 89°, low 58°.

Pressure29.88 inHg
Wind3.3 mph SW
Humidity49%
Visibility6.2 mi
Dew point39°
Mon, 1091° / 54°0Clear
91 °Clear

Sourdough, Monday, 10 August

Clear. High 91°, low 54°.

Pressure29.80 inHg
Wind2 mph SE
Humidity13%
Visibility6.2 mi
Dew point29°
Tue, 1194° / 59°0Clear
94 °Clear

Sourdough, Tuesday, 11 August

Clear. High 94°, low 59°.

Pressure29.83 inHg
Wind1.9 mph SW
Humidity10%
Visibility6.2 mi
Dew point25°
Wed, 1284° / 60°0Overcast
84 °Overcast

Sourdough, Wednesday, 12 August

Overcast. High 84°, low 60°.

Pressure29.85 inHg
Wind10.6 mph E
Humidity21%
Visibility6.2 mi
Dew point39°
Thu, 1389° / 59°0.06Light rain
89 °Light rain

Sourdough, Thursday, 13 August

Light rain. High 89°, low 59°.

Pressure29.77 inHg
Wind13.1 mph N
Humidity35%
Visibility—
Dew point47°
Fri, 1464° / 58°0.57Rain
64 °Rain

Sourdough, Friday, 14 August

Rain. High 64°, low 58°.

Pressure30.00 inHg
Wind5.9 mph N
Humidity77%
Visibility—
Dew point54°
Sat, 1579° / 54°0Partly cloudy
79 °Partly cloudy

Sourdough, Saturday, 15 August

Partly cloudy. High 79°, low 54°.

Pressure30.09 inHg
Wind11.3 mph SE
Humidity50%
Visibility—
Dew point49°
Sun, 1676° / 61°0.01Light rain
76 °Light rain

Sourdough, Sunday, 16 August

Light rain. High 76°, low 61°.

Pressure29.94 inHg
Wind13.4 mph W
Humidity33%
Visibility—
Dew point43°
Mon, 1787° / 61°0Overcast
87 °Overcast

Sourdough, Monday, 17 August

Overcast. High 87°, low 61°.

Pressure29.85 inHg
Wind15.6 mph W
Humidity25%
Visibility—
Dew point40°
Tue, 1883° / 59°0Light rain
83 °Light rain

Sourdough, Tuesday, 18 August

Light rain. High 83°, low 59°.

Pressure29.80 inHg
Wind20.7 mph W
Humidity27%
Visibility—
Dew point41°
Wed, 1982° / 57°0Partly cloudy
82 °Partly cloudy

Sourdough, Wednesday, 19 August

Partly cloudy. High 82°, low 57°.

Pressure29.94 inHg
Wind14.5 mph SE
Humidity27%
Visibility—
Dew point37°
Thu, 2084° / 57°0Partly cloudy
84 °Partly cloudy

Sourdough, Thursday, 20 August

Partly cloudy. High 84°, low 57°.

Pressure29.94 inHg
Wind14.5 mph SE
Humidity31%
Visibility—
Dew point39°
Fri, 2184° / 63°0.11Light rain
84 °Light rain

Sourdough, Friday, 21 August

Light rain. High 84°, low 63°.

Pressure29.74 inHg
Wind19.5 mph S
Humidity27%
Visibility—
Dew point44°
Sat, 2274° / 57°0.15Light rain
74 °Light rain

Sourdough, Saturday, 22 August

Light rain. High 74°, low 57°.

Pressure29.83 inHg
Wind8.8 mph N
Humidity49%
Visibility—
Dew point50°
Sun, 2378° / 53°0Clear
78 °Clear

Sourdough, Sunday, 23 August

Clear. High 78°, low 53°.

Pressure29.88 inHg
Wind12 mph N
Humidity21%
Visibility—
Dew point29°
Mon, 2475° / 49°0Overcast
75 °Overcast

Sourdough, Monday, 24 August

Overcast. High 75°, low 49°.

Pressure29.97 inHg
Wind13.1 mph E
Humidity45%
Visibility—
Dew point40°

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 Sourdough, MT 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 Sourdough, MT 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.