Weather in Waltham, MT
Waltham, Wednesday, 21 October, 07:02
Clear. Feels like 35°. High 68°, low 35°.
Monthly outlook for Waltham, MT: average high 45.8°, average low 29.9°. That is 3.7° below the climate normal for October. Precipitation is expected on 4 days (about 2.4 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 22 October (70.6°), the coolest 28 October (18.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 21 October – 30 October | 47.4° | 54.2° | -3.8° |
| 31 October – 9 November | 43.1° | 48.2° | -2.8° |
| 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
Clear. High 71°, low 38°.
0.83
Waltham, Friday, 23 October
Snow. High 53°, low 36°.
0Waltham, Saturday, 24 October
Clear. High 44°, low 29°.
0
Waltham, Sunday, 25 October
Mostly clear. High 44°, low 28°.
0.04Waltham, Monday, 26 October
Light snow. High 48°, low 29°.
0.16Waltham, Tuesday, 27 October
Snow. High 35°, low 25°.
0
Waltham, Wednesday, 28 October
Partly cloudy. High 34°, low 19°.
0Waltham, Thursday, 29 October
Partly cloudy. High 35°, low 19°.
0Waltham, Friday, 30 October
Clear. High 42°, low 26°.
0
Waltham, Saturday, 31 October
Overcast. High 47°, low 37°.
0Waltham, Sunday, 1 November
Overcast. High 58°, low 41°.
0.16
Waltham, Monday, 2 November
Rain. High 57°, low 41°.
1.19Waltham, Tuesday, 3 November
Snow. High 36°, low 27°.
0Waltham, Wednesday, 4 November
Overcast. High 32°, low 25°.
0Waltham, Thursday, 5 November
Overcast. High 30°, low 22°.
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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