Weather in Portal, MT
Portal, Wednesday, 4 November, 09:36
Overcast. Feels like 32°. High 44°, low 24°.
Monthly outlook for Portal, MT: average high 48.4°, average low 29.1°. That is 3.7° above the climate normal for November. Precipitation is expected on 2 days (about 0.1 inches), against a normal of 4 days and 0.7 inches. The warmest day looks like 12 November (55.2°), the coolest 19 November (21.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 4 November – 13 November | 50.6° | 43° | +4.2° |
| 14 November – 23 November | 44.9° | 38.8° | +3.4° |
| 24 November – 3 December | at normal | 33.9° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Jefferson City (5 mi).
0Portal, Thursday, 5 November
Overcast. High 46°, low 28°.
0Portal, Friday, 6 November
Overcast. High 47°, low 23°.
0.04
Portal, Saturday, 7 November
Light rain. High 51°, low 30°.
0
Portal, Sunday, 8 November
Partly cloudy. High 54°, low 29°.
0.01Portal, Monday, 9 November
Light rain. High 47°, low 27°.
0Portal, Tuesday, 10 November
Overcast. High 53°, low 35°.
0
Portal, Wednesday, 11 November
Mostly clear. High 54°, low 34°.
0
Portal, Thursday, 12 November
Clear. High 55°, low 34°.
0Portal, Friday, 13 November
Partly cloudy. High 54°, low 34°.
0Portal, Saturday, 14 November
Mostly clear. High 53°, low 33°.
0Portal, Sunday, 15 November
Partly cloudy. High 53°, low 33°.
0Portal, Monday, 16 November
Clear. High 49°, low 32°.
0.02
Portal, Tuesday, 17 November
Snow. High 36°, low 25°.
0.06Portal, Wednesday, 18 November
Light snow. High 43°, low 24°.
0.02Portal, Thursday, 19 November
Light snow. High 34°, low 22°.
0.03Portal, Friday, 20 November
Climate normal for this date — 60-year average.
0.03Portal, Saturday, 21 November
Climate normal for this date — 60-year average.
0.04Portal, Sunday, 22 November
Climate normal for this date — 60-year average.
0.04Portal, Monday, 23 November
Climate normal for this date — 60-year average.
0.06
Portal, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.09Portal, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.04Portal, Thursday, 26 November
Climate normal for this date — 60-year average.
0.04Portal, Friday, 27 November
Climate normal for this date — 60-year average.
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.
0.07Portal, Wednesday, 2 December
Climate normal for this date — 60-year average.
0.04Portal, Thursday, 3 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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