Weather in Harrison, MT
Harrison, Friday, 9 October, 06:53
Overcast. Feels like 41°. High 79°, low 41°.
Monthly outlook for Harrison, MT: average high 48.7°, average low 33.8°. That is 4.8° below the climate normal for October. Precipitation is expected on 5 days (about 2.1 inches), against a normal of 4 days and 0.8 inches. The warmest day looks like 9 October (79.2°), the coolest 13 October (22.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 October – 18 October | 47.5° | 57.8° | -5.7° |
| 19 October – 28 October | 50.6° | 54.7° | -2.3° |
| 29 October – 7 November | at normal | 47.4° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Cardwell (14 mi).
0.44
Harrison, Saturday, 10 October
Snow. High 58°, low 33°.
0.77Harrison, Sunday, 11 October
Snow. High 35°, low 32°.
0.53Harrison, Monday, 12 October
Snow. High 32°, low 24°.
0Harrison, Tuesday, 13 October
Overcast. High 33°, low 22°.
0
Harrison, Wednesday, 14 October
Partly cloudy. High 46°, low 25°.
0.13Harrison, Thursday, 15 October
Light snow. High 35°, low 26°.
0
Harrison, Friday, 16 October
Mostly clear. High 41°, low 23°.
0Harrison, Saturday, 17 October
Mostly clear. High 56°, low 36°.
0Harrison, Sunday, 18 October
Overcast. High 59°, low 42°.
0Harrison, Monday, 19 October
Overcast. High 64°, low 44°.
0.01
Harrison, Tuesday, 20 October
Light rain. High 54°, low 40°.
0.25Harrison, Wednesday, 21 October
Snow. High 40°, low 35°.
0Harrison, Thursday, 22 October
Overcast. High 44°, low 37°.
0Harrison, Friday, 23 October
Overcast. High 48°, low 38°.
0Harrison, Saturday, 24 October
Overcast. High 54°, low 41°.
0.04Harrison, Sunday, 25 October
Climate normal for this date — 60-year average.
0.07
Harrison, Monday, 26 October
Climate normal for this date — 60-year average.
0.03Harrison, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.06Harrison, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.06Harrison, Thursday, 29 October
Climate normal for this date — 60-year average.
0.04Harrison, Friday, 30 October
Climate normal for this date — 60-year average.
0.05Harrison, Saturday, 31 October
Climate normal for this date — 60-year average.
0.04Harrison, Sunday, 1 November
Climate normal for this date — 60-year average.
0.03Harrison, Monday, 2 November
Climate normal for this date — 60-year average.
0.04Harrison, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.04Harrison, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.04Harrison, Thursday, 5 November
Climate normal for this date — 60-year average.
0.04Harrison, Friday, 6 November
Climate normal for this date — 60-year average.
0.04Harrison, Saturday, 7 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 Harrison, 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 Harrison, 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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