Weather in Waltham, MT
Waltham, Tuesday, 20 October, 10:13
Clear. Feels like 45°. High 60°, low 39°.
Monthly outlook for Waltham, MT: average high 54.1°, average low 37.1°. That is 0.5° above the climate normal for October. Precipitation is expected on 1 day (about 0.3 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 22 October (71.3°), the coolest 26 October (27.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 20 October – 29 October | 52.6° | 55.1° | -1.4° |
| 30 October – 8 November | 56.6° | 48.8° | +4.3° |
| 9 November – 18 November | at normal | 44.7° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Carter (15 mi).
0Waltham, Wednesday, 21 October
Clear. High 67°, low 36°.
0Waltham, Thursday, 22 October
Clear. High 71°, low 49°.
0.26
Waltham, Friday, 23 October
Rain. High 51°, low 38°.
0
Waltham, Saturday, 24 October
Partly cloudy. High 53°, low 30°.
0
Waltham, Sunday, 25 October
Overcast. High 41°, low 29°.
0Waltham, Monday, 26 October
Clear. High 40°, low 28°.
0Waltham, Tuesday, 27 October
Partly cloudy. High 51°, low 28°.
0Waltham, Wednesday, 28 October
Overcast. High 43°, low 33°.
0Waltham, Thursday, 29 October
Clear. High 48°, low 32°.
0Waltham, Friday, 30 October
Overcast. High 52°, low 36°.
0Waltham, Saturday, 31 October
Clear. High 52°, low 36°.
0
Waltham, Sunday, 1 November
Mostly clear. High 63°, low 41°.
0Waltham, Monday, 2 November
Partly cloudy. High 61°, low 49°.
0Waltham, Tuesday, 3 November
Overcast. High 55°, low 45°.
0Waltham, Wednesday, 4 November
Clear. High 55°, low 44°.
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.
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.
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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