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As of 12:05 MDT

Weather in Plains, MT

88°Current weather

Plains, Saturday, 8 August, 12:05

Mostly clear. Feels like 84°. High 90°, low 55°.

Pressure29.83 inHg
Wind2 mph SE
Humidity22%
Visibility6.2 mi
Dew point42°
Sun, 0990° / 53°0Partly cloudy
90 °Partly cloudy

Plains, Sunday, 9 August

Partly cloudy. High 90°, low 53°.

Pressure29.85 inHg
Wind1.7 mph W
Humidity15%
Visibility6.2 mi
Dew point36°
Mon, 1091° / 57°0Clear
91 °Clear

Plains, Monday, 10 August

Clear. High 91°, low 57°.

Pressure29.85 inHg
Wind3.8 mph W
Humidity16%
Visibility6.2 mi
Dew point34°
Tue, 1194° / 55°0Clear
94 °Clear

Plains, Tuesday, 11 August

Clear. High 94°, low 55°.

Pressure29.97 inHg
Wind0.9 mph E
Humidity19%
Visibility6.2 mi
Dew point38°
Wed, 1293° / 57°0Clear
93 °Clear

Plains, Wednesday, 12 August

Clear. High 93°, low 57°.

Pressure29.91 inHg
Wind2.5 mph NE
Humidity22%
Visibility6.2 mi
Dew point40°
Thu, 1392° / 55°0Partly cloudy
92 °Partly cloudy

Plains, Thursday, 13 August

Partly cloudy. High 92°, low 55°.

Pressure29.88 inHg
Wind4 mph NE
Humidity37%
Visibility—
Dew point49°
Fri, 1493° / 57°0Overcast
93 °Overcast

Plains, Friday, 14 August

Overcast. High 93°, low 57°.

Pressure29.88 inHg
Wind4.2 mph W
Humidity30%
Visibility—
Dew point46°
Sat, 1588° / 68°0.01Light rain
88 °Light rain

Plains, Saturday, 15 August

Light rain. High 88°, low 68°.

Pressure29.94 inHg
Wind5.1 mph NW
Humidity29%
Visibility—
Dew point47°
Sun, 1693° / 59°0Overcast
93 °Overcast

Plains, Sunday, 16 August

Overcast. High 93°, low 59°.

Pressure30.00 inHg
Wind8.8 mph W
Humidity25%
Visibility—
Dew point45°
Mon, 1795° / 58°0Overcast
95 °Overcast

Plains, Monday, 17 August

Overcast. High 95°, low 58°.

Pressure30.00 inHg
Wind4.3 mph SW
Humidity21%
Visibility—
Dew point40°
Tue, 1893° / 65°0Overcast
93 °Overcast

Plains, Tuesday, 18 August

Overcast. High 93°, low 65°.

Pressure29.97 inHg
Wind4.4 mph SE
Humidity26%
Visibility—
Dew point41°
Wed, 1997° / 61°0Overcast
97 °Overcast

Plains, Wednesday, 19 August

Overcast. High 97°, low 61°.

Pressure29.94 inHg
Wind3.8 mph NE
Humidity30%
Visibility—
Dew point49°
Thu, 20105° / 63°0Clear
105 °Clear

Plains, Thursday, 20 August

Clear. High 105°, low 63°.

Pressure29.80 inHg
Wind8.9 mph SW
Humidity23%
Visibility—
Dew point48°
Fri, 2195° / 63°0Overcast
95 °Overcast

Plains, Friday, 21 August

Overcast. High 95°, low 63°.

Pressure29.88 inHg
Wind9.2 mph W
Humidity30%
Visibility—
Dew point51°
Sat, 2285° / 60°0.04Light rain
85 °Light rain

Plains, Saturday, 22 August

Light rain. High 85°, low 60°.

Pressure29.97 inHg
Wind13.4 mph W
Humidity42%
Visibility—
Dew point51°
Sun, 2382° / 50°0Mostly clear
82 °Mostly clear

Plains, Sunday, 23 August

Mostly clear. High 82°, low 50°.

Pressure29.97 inHg
Wind10.4 mph W
Humidity16%
Visibility—
Dew point26°

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 Plains, 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 Plains, 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.