Weather in Waltham, MT
Waltham, Wednesday, 21 October, 22:53
Mostly clear. Feels like 58°. High 69°, low 34°.
Monthly outlook for Waltham, MT: average high 52.6°, average low 34.7°. That is 0° above the climate normal for October. Precipitation is expected on 1 day (about 0.7 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 22 October (70.2°), the coolest 25 October (26.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 21 October – 30 October | 51.9° | 54.2° | -1.3° |
| 31 October – 9 November | 53.8° | 48.2° | +3.1° |
| 10 November – 19 November | at normal | 44.4° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Carter (15 mi).
0
Waltham, Thursday, 22 October
Mostly clear. High 70°, low 40°.
0.72
Waltham, Friday, 23 October
Snow. High 48°, low 36°.
0
Waltham, Saturday, 24 October
Clear. High 46°, low 27°.
0Waltham, Sunday, 25 October
Clear. High 40°, low 26°.
0Waltham, Monday, 26 October
Clear. High 43°, low 27°.
0
Waltham, Tuesday, 27 October
Overcast. High 41°, low 29°.
0Waltham, Wednesday, 28 October
Mostly clear. High 47°, low 29°.
0Waltham, Thursday, 29 October
Overcast. High 59°, low 38°.
0
Waltham, Friday, 30 October
Partly cloudy. High 55°, low 46°.
0
Waltham, Saturday, 31 October
Light rain. High 50°, low 36°.
0Waltham, Sunday, 1 November
Overcast. High 42°, low 34°.
0Waltham, Monday, 2 November
Overcast. High 46°, low 33°.
0Waltham, Tuesday, 3 November
Partly cloudy. High 63°, low 39°.
0.02Waltham, Wednesday, 4 November
Light rain. High 58°, low 41°.
0Waltham, Thursday, 5 November
Light rain. High 62°, low 39°.
0.03Waltham, Friday, 6 November
Climate normal for this date — 60-year average.
0.02Waltham, Saturday, 7 November
Climate normal for this date — 60-year average.
0.05Waltham, Sunday, 8 November
Climate normal for this date — 60-year average.
0.04Waltham, Monday, 9 November
Climate normal for this date — 60-year average.
0.03Waltham, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.03Waltham, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.02Waltham, Thursday, 12 November
Climate normal for this date — 60-year average.
0.02Waltham, Friday, 13 November
Climate normal for this date — 60-year average.
0.03Waltham, Saturday, 14 November
Climate normal for this date — 60-year average.
0.01Waltham, Sunday, 15 November
Climate normal for this date — 60-year average.
0.03Waltham, Monday, 16 November
Climate normal for this date — 60-year average.
0.04Waltham, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.03Waltham, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.03Waltham, Thursday, 19 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 Waltham, 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 Waltham, 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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