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As of 16:16 MDT

Weather in Lanark, MT

87°Current weather

Lanark, Saturday, 8 August, 16:16

Mostly clear. Feels like 85°. High 88°, low 53°.

Pressure29.80 inHg
Wind10.4 mph N
Humidity29%
Visibility6.2 mi
Dew point51°
Sun, 0990° / 54°0Clear
90 °Clear

Lanark, Sunday, 9 August

Clear. High 90°, low 54°.

Pressure29.85 inHg
Wind13.5 mph E
Humidity29%
Visibility6.2 mi
Dew point46°
Mon, 1085° / 48°0Partly cloudy
85 °Partly cloudy

Lanark, Monday, 10 August

Partly cloudy. High 85°, low 48°.

Pressure29.88 inHg
Wind12.2 mph NE
Humidity31%
Visibility6.2 mi
Dew point45°
Tue, 1187° / 58°0Overcast
87 °Overcast

Lanark, Tuesday, 11 August

Overcast. High 87°, low 58°.

Pressure29.91 inHg
Wind6.2 mph E
Humidity31%
Visibility6.2 mi
Dew point47°
Wed, 1283° / 58°0Partly cloudy
83 °Partly cloudy

Lanark, Wednesday, 12 August

Partly cloudy. High 83°, low 58°.

Pressure29.94 inHg
Wind10.7 mph NE
Humidity32%
Visibility6.2 mi
Dew point46°
Thu, 1382° / 56°0Mostly clear
82 °Mostly clear

Lanark, Thursday, 13 August

Mostly clear. High 82°, low 56°.

Pressure30.09 inHg
Wind16.4 mph E
Humidity33%
Visibility—
Dew point42°
Fri, 1476° / 65°0.33Rain
76 °Rain

Lanark, Friday, 14 August

Rain. High 76°, low 65°.

Pressure29.91 inHg
Wind22.8 mph E
Humidity68%
Visibility—
Dew point55°
Sat, 1580° / 61°0Light rain
80 °Light rain

Lanark, Saturday, 15 August

Light rain. High 80°, low 61°.

Pressure30.06 inHg
Wind12.4 mph N
Humidity37%
Visibility—
Dew point47°
Sun, 1685° / 62°0.26Rain
85 °Rain

Lanark, Sunday, 16 August

Rain. High 85°, low 62°.

Pressure30.00 inHg
Wind10 mph SE
Humidity46%
Visibility—
Dew point53°
Mon, 1794° / 69°0.02Light rain
94 °Light rain

Lanark, Monday, 17 August

Light rain. High 94°, low 69°.

Pressure29.91 inHg
Wind17.2 mph W
Humidity24%
Visibility—
Dew point46°
Tue, 1889° / 66°0Overcast
89 °Overcast

Lanark, Tuesday, 18 August

Overcast. High 89°, low 66°.

Pressure29.97 inHg
Wind13.4 mph N
Humidity29%
Visibility—
Dew point47°
Wed, 1977° / 67°0.09Light rain
77 °Light rain

Lanark, Wednesday, 19 August

Light rain. High 77°, low 67°.

Pressure30.09 inHg
Wind5.7 mph S
Humidity69%
Visibility—
Dew point58°
Thu, 2086° / 64°0Partly cloudy
86 °Partly cloudy

Lanark, Thursday, 20 August

Partly cloudy. High 86°, low 64°.

Pressure29.97 inHg
Wind10.4 mph E
Humidity42%
Visibility—
Dew point54°
Fri, 2194° / 67°0Overcast
94 °Overcast

Lanark, Friday, 21 August

Overcast. High 94°, low 67°.

Pressure29.77 inHg
Wind18.9 mph NE
Humidity22%
Visibility—
Dew point45°
Sat, 2274° / 53°0Overcast
74 °Overcast

Lanark, Saturday, 22 August

Overcast. High 74°, low 53°.

Pressure30.15 inHg
Wind15.1 mph SE
Humidity38%
Visibility—
Dew point40°
Sun, 2384° / 59°0Clear
84 °Clear

Lanark, Sunday, 23 August

Clear. High 84°, low 59°.

Pressure30.06 inHg
Wind12.4 mph NE
Humidity29%
Visibility—
Dew point42°

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 Lanark, 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 Lanark, 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.