Weather in Waltham, MT
Waltham, Wednesday, 14 October, 05:37
Partly cloudy. Feels like 34°. High 61°, low 34°.
Monthly outlook for Waltham, MT: average high 61.7°, average low 42°. That is 3° above the climate normal for October. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 22 October (73.7°), the coolest 14 October (33.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 14 October – 23 October | 63.2° | 57.7° | +3° |
| 24 October – 2 November | 59.2° | 52.2° | +3.9° |
| 3 November – 12 November | at normal | 46.6° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Carter (15 mi).
0
Waltham, Thursday, 15 October
Clear. High 52°, low 35°.
0
Waltham, Friday, 16 October
Mostly clear. High 72°, low 34°.
0
Waltham, Saturday, 17 October
Overcast. High 74°, low 53°.
0Waltham, Sunday, 18 October
Clear. High 65°, low 42°.
0
Waltham, Monday, 19 October
Partly cloudy. High 62°, low 42°.
0Waltham, Tuesday, 20 October
Overcast. High 55°, low 46°.
0Waltham, Wednesday, 21 October
Clear. High 64°, low 41°.
0Waltham, Thursday, 22 October
Mostly clear. High 74°, low 51°.
0Waltham, Friday, 23 October
Overcast. High 55°, low 44°.
0Waltham, Saturday, 24 October
Clear. High 57°, low 36°.
0Waltham, Sunday, 25 October
Mostly clear. High 60°, low 43°.
0Waltham, Monday, 26 October
Overcast. High 67°, low 46°.
0Waltham, Tuesday, 27 October
Overcast. High 55°, low 43°.
0Waltham, Wednesday, 28 October
Mostly clear. High 62°, low 39°.
0Waltham, Thursday, 29 October
Overcast. High 54°, low 45°.
0.02Waltham, Friday, 30 October
Climate normal for this date — 60-year average.
0.03Waltham, Saturday, 31 October
Climate normal for this date — 60-year average.
0.02Waltham, Sunday, 1 November
Climate normal for this date — 60-year average.
0.02Waltham, Monday, 2 November
Climate normal for this date — 60-year average.
0.02Waltham, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.04Waltham, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.04Waltham, Thursday, 5 November
Climate normal for this date — 60-year average.
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.
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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