Weather in Harrison, MT
Harrison, Friday, 9 October, 08:21
Overcast. Feels like 42°. High 79°, low 41°.
Monthly outlook for Harrison, MT: average high 55.6°, average low 36.9°. That is 0.9° below the climate normal for October. Precipitation is expected on 3 days (about 1.7 inches), against a normal of 4 days and 0.8 inches. The warmest day looks like 9 October (79.2°), the coolest 13 October (24.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 October – 18 October | 52° | 57.8° | -3.2° |
| 19 October – 28 October | 61.6° | 54.7° | +3.8° |
| 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).
0.58
Harrison, Saturday, 10 October
Rain. High 58°, low 33°.
0.8
Harrison, Sunday, 11 October
Snow. High 35°, low 32°.
0.32Harrison, Monday, 12 October
Snow. High 31°, low 26°.
0
Harrison, Tuesday, 13 October
Partly cloudy. High 34°, low 24°.
0
Harrison, Wednesday, 14 October
Clear. High 46°, low 27°.
0
Harrison, Thursday, 15 October
Mostly clear. High 53°, low 37°.
0Harrison, Friday, 16 October
Light rain. High 51°, low 30°.
0Harrison, Saturday, 17 October
Partly cloudy. High 67°, low 43°.
0Harrison, Sunday, 18 October
Overcast. High 65°, low 46°.
0Harrison, Monday, 19 October
Overcast. High 68°, low 46°.
0.02Harrison, Tuesday, 20 October
Light rain. High 55°, low 42°.
0Harrison, Wednesday, 21 October
Overcast. High 62°, low 42°.
0Harrison, Thursday, 22 October
Partly cloudy. High 49°, low 38°.
0Harrison, Friday, 23 October
Clear. High 66°, low 37°.
0Harrison, Saturday, 24 October
Clear. High 69°, low 45°.
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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