Weather in Portal, MT
Portal, Thursday, 12 November, 11:59
Overcast. Feels like 48°. High 52°, low 34°.
Monthly outlook for Portal, MT: average high 29.1°, average low 15.1°. That is 5° below the climate normal for November. Precipitation is expected on 10 days (about 1.7 inches), against a normal of 4 days and 0.7 inches. The warmest day looks like 12 November (52.5°), the coolest 26 November (-23°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 12 November – 21 November | 38.1° | 40° | -1° |
| 22 November – 1 December | 14.1° | 34.5° | -11.3° |
| 2 December – 11 December | at normal | 32° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Jefferson City (5 mi).
0Portal, Friday, 13 November
Overcast. High 51°, low 37°.
0
Portal, Saturday, 14 November
Partly cloudy. High 49°, low 29°.
0
Portal, Sunday, 15 November
Mostly clear. High 47°, low 29°.
0.11
Portal, Monday, 16 November
Snow. High 42°, low 29°.
0.09Portal, Tuesday, 17 November
Light snow. High 28°, low 26°.
0.2Portal, Wednesday, 18 November
Snow. High 36°, low 27°.
0.25Portal, Thursday, 19 November
Snow. High 26°, low 19°.
0.28Portal, Friday, 20 November
Snow. High 25°, low 16°.
0.22Portal, Saturday, 21 November
Snow. High 25°, low 17°.
0.01Portal, Sunday, 22 November
Light snow. High 27°, low 12°.
0.23Portal, Monday, 23 November
Snow. High 30°, low 9°.
0.14Portal, Tuesday, 24 November
Light snow. High 8°, low -2°.
0.06Portal, Wednesday, 25 November
Light snow. High -2°, low -13°.
0.01Portal, Thursday, 26 November
Light snow. High 7°, low -23°.
0.06Portal, Friday, 27 November
Light snow. High 14°, low -6°.
0.04Portal, Saturday, 28 November
Climate normal for this date — 60-year average.
0.04Portal, Sunday, 29 November
Climate normal for this date — 60-year average.
0.03Portal, Monday, 30 November
Climate normal for this date — 60-year average.
0.04Portal, Tuesday, 1 December
Climate normal for this date — 60-year average.
0.07
Portal, Wednesday, 2 December
Climate normal for this date — 60-year average.
0.04Portal, Thursday, 3 December
Climate normal for this date — 60-year average.
0.04Portal, Friday, 4 December
Climate normal for this date — 60-year average.
0.04Portal, Saturday, 5 December
Climate normal for this date — 60-year average.
0.05Portal, Sunday, 6 December
Climate normal for this date — 60-year average.
0.03Portal, Monday, 7 December
Climate normal for this date — 60-year average.
0.02Portal, Tuesday, 8 December
Climate normal for this date — 60-year average.
0.03Portal, Wednesday, 9 December
Climate normal for this date — 60-year average.
0.04Portal, Thursday, 10 December
Climate normal for this date — 60-year average.
0.03Portal, Friday, 11 December
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 Portal, 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 Portal, 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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