Weather in Lanark, MT
Lanark, Saturday, 10 October, 08:29
Overcast. Feels like 48°. High 64°, low 41°.
Monthly outlook for Lanark, MT: average high 53.4°, average low 37.7°. That is 1.4° below the climate normal for October. Precipitation is expected on 2 days (about 0.7 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 10 October (64°), the coolest 17 October (24.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 10 October – 19 October | 52.4° | 56.9° | -2.5° |
| 20 October – 29 October | 55° | 52.7° | +1.3° |
| 30 October – 8 November | at normal | 46° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Culbertson (7 mi).
0.33
Lanark, Sunday, 11 October
Rain. High 44°, low 37°.
0.36
Lanark, Monday, 12 October
Snow. High 39°, low 35°.
0Lanark, Tuesday, 13 October
Overcast. High 49°, low 36°.
0
Lanark, Wednesday, 14 October
Clear. High 55°, low 31°.
0Lanark, Thursday, 15 October
Clear. High 62°, low 40°.
0
Lanark, Friday, 16 October
Partly cloudy. High 40°, low 30°.
0
Lanark, Saturday, 17 October
Mostly clear. High 50°, low 25°.
0Lanark, Sunday, 18 October
Overcast. High 57°, low 41°.
0Lanark, Monday, 19 October
Overcast. High 64°, low 45°.
0Lanark, Tuesday, 20 October
Overcast. High 51°, low 43°.
0Lanark, Wednesday, 21 October
Overcast. High 59°, low 36°.
0Lanark, Thursday, 22 October
Clear. High 54°, low 42°.
0Lanark, Friday, 23 October
Overcast. High 58°, low 40°.
0Lanark, Saturday, 24 October
Overcast. High 63°, low 46°.
0Lanark, Sunday, 25 October
Overcast. High 44°, low 35°.
0.03Lanark, Monday, 26 October
Climate normal for this date — 60-year average.
0.04Lanark, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.03Lanark, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.05Lanark, Thursday, 29 October
Climate normal for this date — 60-year average.
0.03Lanark, Friday, 30 October
Climate normal for this date — 60-year average.
0.02Lanark, Saturday, 31 October
Climate normal for this date — 60-year average.
0.04Lanark, Sunday, 1 November
Climate normal for this date — 60-year average.
0.02Lanark, Monday, 2 November
Climate normal for this date — 60-year average.
0.02Lanark, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.03Lanark, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.02Lanark, Thursday, 5 November
Climate normal for this date — 60-year average.
0.02Lanark, Friday, 6 November
Climate normal for this date — 60-year average.
0.02Lanark, Saturday, 7 November
Climate normal for this date — 60-year average.
0.03Lanark, Sunday, 8 November
Climate normal for this date — 60-year average.
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.
Sun and moon today
Weather history
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