Weather in West Lewistown, MT
West Lewistown, Sunday, 9 August, 09:42
Mostly clear. Feels like 65°. High 85°, low 54°.
Monthly outlook for West Lewistown, MT: average high 87.7°, average low 61.6°. That is 4.9° above the climate normal for August. Precipitation is expected on 3 days (about 0.6 inches), against a normal of 4 days and 1.0 inches. The warmest day looks like 24 August (99.2°), the coolest 10 August (50.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 83.3° | 79.3° | +2.2° |
| 19 August – 28 August | 95° | 77.9° | +9.5° |
| 29 August – 7 September | at normal | 75.1° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Lewistown (3 mi).
0
West Lewistown, Monday, 10 August
Clear. High 86°, low 50°.
0West Lewistown, Tuesday, 11 August
Clear. High 85°, low 62°.
0.1
West Lewistown, Wednesday, 12 August
Light rain. High 86°, low 60°.
0.44West Lewistown, Thursday, 13 August
Rain. High 70°, low 56°.
0
West Lewistown, Friday, 14 August
Overcast. High 69°, low 55°.
0.04West Lewistown, Saturday, 15 August
Light rain. High 85°, low 55°.
0.02West Lewistown, Sunday, 16 August
Light rain. High 92°, low 62°.
0West Lewistown, Monday, 17 August
Overcast. High 88°, low 69°.
0
West Lewistown, Tuesday, 18 August
Partly cloudy. High 86°, low 63°.
0West Lewistown, Wednesday, 19 August
Clear. High 91°, low 64°.
0West Lewistown, Thursday, 20 August
Clear. High 97°, low 66°.
0West Lewistown, Friday, 21 August
Partly cloudy. High 90°, low 66°.
0West Lewistown, Saturday, 22 August
Clear. High 95°, low 62°.
0West Lewistown, Sunday, 23 August
Clear. High 98°, low 70°.
0West Lewistown, Monday, 24 August
Clear. High 99°, low 70°.
0.05West Lewistown, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.03West Lewistown, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.04West Lewistown, Thursday, 27 August
Climate normal for this date — 60-year average.
0.05West Lewistown, Friday, 28 August
Climate normal for this date — 60-year average.
0.04West Lewistown, Saturday, 29 August
Climate normal for this date — 60-year average.
0.06West Lewistown, Sunday, 30 August
Climate normal for this date — 60-year average.
0.06West Lewistown, Monday, 31 August
Climate normal for this date — 60-year average.
0.06West Lewistown, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.03West Lewistown, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.02West Lewistown, Thursday, 3 September
Climate normal for this date — 60-year average.
0.03West Lewistown, Friday, 4 September
Climate normal for this date — 60-year average.
0.05West Lewistown, Saturday, 5 September
Climate normal for this date — 60-year average.
0.06West Lewistown, Sunday, 6 September
Climate normal for this date — 60-year average.
0.06West Lewistown, Monday, 7 September
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 West Lewistown, 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 West Lewistown, 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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