Weather in Halfmoon, MT
Halfmoon, Sunday, 11 October, 17:21
Overcast. Feels like 32°. High 41°, low 35°.
Monthly outlook for Halfmoon, MT: average high 51.1°, average low 36.8°. That is 0.1° below the climate normal for October. Precipitation is expected on 4 days (about 0.5 inches), against a normal of 7 days and 1.6 inches. The warmest day looks like 17 October (70.1°), the coolest 12 October (28.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 11 October – 20 October | 53.5° | 52.5° | +0.6° |
| 21 October – 30 October | 47° | 47.5° | -0.3° |
| 31 October – 9 November | at normal | 42.2° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Martin City (10 mi).
0.02
Halfmoon, Monday, 12 October
Light snow. High 45°, low 28°.
0
Halfmoon, Tuesday, 13 October
Clear. High 47°, low 31°.
0
Halfmoon, Wednesday, 14 October
Partly cloudy. High 51°, low 36°.
0Halfmoon, Thursday, 15 October
Clear. High 55°, low 35°.
0
Halfmoon, Friday, 16 October
Mostly clear. High 59°, low 41°.
0Halfmoon, Saturday, 17 October
Clear. High 70°, low 44°.
0Halfmoon, Sunday, 18 October
Mostly clear. High 61°, low 43°.
0Halfmoon, Monday, 19 October
Overcast. High 59°, low 39°.
0.14
Halfmoon, Tuesday, 20 October
Light rain. High 47°, low 41°.
0.12Halfmoon, Wednesday, 21 October
Snow. High 46°, low 39°.
0.12Halfmoon, Thursday, 22 October
Snow. High 42°, low 40°.
0Halfmoon, Friday, 23 October
Overcast. High 47°, low 37°.
0Halfmoon, Saturday, 24 October
Mostly clear. High 49°, low 31°.
0Halfmoon, Sunday, 25 October
Partly cloudy. High 54°, low 34°.
0Halfmoon, Monday, 26 October
Overcast. High 43°, low 34°.
0.1
Halfmoon, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.11Halfmoon, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.12Halfmoon, Thursday, 29 October
Climate normal for this date — 60-year average.
0.09Halfmoon, Friday, 30 October
Climate normal for this date — 60-year average.
0.16Halfmoon, Saturday, 31 October
Climate normal for this date — 60-year average.
0.14Halfmoon, Sunday, 1 November
Climate normal for this date — 60-year average.
0.15Halfmoon, Monday, 2 November
Climate normal for this date — 60-year average.
0.09Halfmoon, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.18Halfmoon, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.12Halfmoon, Thursday, 5 November
Climate normal for this date — 60-year average.
0.15Halfmoon, Friday, 6 November
Climate normal for this date — 60-year average.
0.17Halfmoon, Saturday, 7 November
Climate normal for this date — 60-year average.
0.12Halfmoon, Sunday, 8 November
Climate normal for this date — 60-year average.
0.13Halfmoon, Monday, 9 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 Halfmoon, 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 Halfmoon, 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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