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As of 22:39 MDT

Weather in Saint Mary, MT

59°Current weather

Saint Mary, Saturday, 8 August, 22:39

Overcast. Feels like 56°. High 77°, low 46°.

Pressure29.94 inHg
Wind9.1 mph SW
Humidity41%
Visibility6.2 mi
Dew point35°
Sun, 0976° / 45°0Clear
76 °Clear

Saint Mary, Sunday, 9 August

Clear. High 76°, low 45°.

Pressure29.91 inHg
Wind3.4 mph NE
Humidity36%
Visibility6.2 mi
Dew point42°
Mon, 1078° / 44°0Clear
78 °Clear

Saint Mary, Monday, 10 August

Clear. High 78°, low 44°.

Pressure29.91 inHg
Wind4.6 mph N
Humidity34%
Visibility6.2 mi
Dew point39°
Tue, 1178° / 50°0Clear
78 °Clear

Saint Mary, Tuesday, 11 August

Clear. High 78°, low 50°.

Pressure29.97 inHg
Wind2 mph NE
Humidity32%
Visibility6.2 mi
Dew point40°
Wed, 1269° / 50°0.05Light rain
69 °Light rain

Saint Mary, Wednesday, 12 August

Light rain. High 69°, low 50°.

Pressure29.94 inHg
Wind8.3 mph NE
Humidity55%
Visibility6.2 mi
Dew point48°
Thu, 1355° / 51°0.14Light rain
55 °Light rain

Saint Mary, Thursday, 13 August

Light rain. High 55°, low 51°.

Pressure30.00 inHg
Wind7.7 mph N
Humidity90%
Visibility—
Dew point50°
Fri, 1455° / 49°0.05Light rain
55 °Light rain

Saint Mary, Friday, 14 August

Light rain. High 55°, low 49°.

Pressure30.18 inHg
Wind6 mph N
Humidity94%
Visibility—
Dew point48°
Sat, 1576° / 45°0Clear
76 °Clear

Saint Mary, Saturday, 15 August

Clear. High 76°, low 45°.

Pressure30.09 inHg
Wind6 mph SE
Humidity44%
Visibility—
Dew point43°
Sun, 1680° / 56°0Overcast
80 °Overcast

Saint Mary, Sunday, 16 August

Overcast. High 80°, low 56°.

Pressure29.97 inHg
Wind15.6 mph W
Humidity27%
Visibility—
Dew point37°
Mon, 1782° / 55°0Overcast
82 °Overcast

Saint Mary, Monday, 17 August

Overcast. High 82°, low 55°.

Pressure29.94 inHg
Wind21.7 mph W
Humidity23%
Visibility—
Dew point34°
Tue, 1878° / 57°0Overcast
78 °Overcast

Saint Mary, Tuesday, 18 August

Overcast. High 78°, low 57°.

Pressure30.03 inHg
Wind11.5 mph SW
Humidity40%
Visibility—
Dew point46°
Wed, 1966° / 55°0.24Rain
66 °Rain

Saint Mary, Wednesday, 19 August

Rain. High 66°, low 55°.

Pressure30.00 inHg
Wind14.9 mph SW
Humidity93%
Visibility—
Dew point54°
Thu, 2073° / 54°0Overcast
73 °Overcast

Saint Mary, Thursday, 20 August

Overcast. High 73°, low 54°.

Pressure29.88 inHg
Wind11.8 mph W
Humidity33%
Visibility—
Dew point38°
Fri, 2173° / 51°0Overcast
73 °Overcast

Saint Mary, Friday, 21 August

Overcast. High 73°, low 51°.

Pressure29.85 inHg
Wind16.5 mph W
Humidity34%
Visibility—
Dew point37°
Sat, 2276° / 49°0Light rain
76 °Light rain

Saint Mary, Saturday, 22 August

Light rain. High 76°, low 49°.

Pressure29.88 inHg
Wind8.4 mph SW
Humidity35%
Visibility—
Dew point39°
Sun, 2376° / 56°0Overcast
76 °Overcast

Saint Mary, Sunday, 23 August

Overcast. High 76°, low 56°.

Pressure29.77 inHg
Wind23.4 mph W
Humidity30%
Visibility—
Dew point37°

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 Saint Mary, 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 Saint Mary, 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.