Weather in Portal, MT
Portal, Friday, 30 October, 00:55
Overcast. Feels like 28°. High 48°, low 27°.
Monthly outlook for Portal, MT: average high 42.4°, average low 26.8°. That is 0.7° below the climate normal for October. Precipitation is expected on 3 days (about 0.7 inches), against a normal of 4 days and 0.7 inches. The warmest day looks like 7 November (48.7°), the coolest 3 November (20.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 30 October – 8 November | 44.5° | 45° | -0.3° |
| 9 November – 18 November | 39° | 41° | -1.1° |
| 19 November – 28 November | at normal | 35.7° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Jefferson City (5 mi).
0.02
Portal, Saturday, 31 October
Light rain. High 45°, low 29°.
0.38
Portal, Sunday, 1 November
Snow. High 37°, low 28°.
0.17Portal, Monday, 2 November
Snow. High 38°, low 20°.
0Portal, Tuesday, 3 November
Overcast. High 48°, low 20°.
0
Portal, Wednesday, 4 November
Partly cloudy. High 46°, low 28°.
0Portal, Thursday, 5 November
Overcast. High 43°, low 32°.
0Portal, Friday, 6 November
Overcast. High 45°, low 32°.
0
Portal, Saturday, 7 November
Clear. High 49°, low 31°.
0Portal, Sunday, 8 November
Overcast. High 45°, low 29°.
0Portal, Monday, 9 November
Clear. High 45°, low 28°.
0Portal, Tuesday, 10 November
Overcast. High 46°, low 29°.
0.02Portal, Wednesday, 11 November
Light snow. High 39°, low 27°.
0Portal, Thursday, 12 November
Clear. High 39°, low 25°.
0.09Portal, Friday, 13 November
Light snow. High 33°, low 23°.
0Portal, Saturday, 14 November
Overcast. High 32°, low 21°.
0.02
Portal, Sunday, 15 November
Climate normal for this date — 60-year average.
0.04Portal, Monday, 16 November
Climate normal for this date — 60-year average.
0.04Portal, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.05Portal, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.06Portal, Thursday, 19 November
Climate normal for this date — 60-year average.
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.
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
57°Weather in Annapolis, MD
54°Weather in Atlanta, GA
61°Weather in Augusta, ME54°Weather in Austin, TX66°Weather in Baton Rouge, LA61°Weather in Bismarck, ND38°Weather in Boise, ID45°Weather in Boston, MA56°Weather in Carson City, NV53°Weather in Charleston, WV49°Weather in Charlotte Amalie, VI82°Weather in Cheyenne, WY44°Weather in Columbia, SC57°Weather in Columbus, OH60°Weather in Concord, NH55°Weather in Denver, CO47°Weather in Des Moines, IA53°Weather in Dover, DE53°Weather in Frankfort, KY52°Weather in Harrisburg, PA53°Weather in Hartford, CT55°Weather in Helena, MT32°Weather in Honolulu, HI
77°Weather in Indianapolis, IN57°Weather in Jackson, MS61°Weather in Jefferson City, MO64°Weather in Juneau, AK19°Weather in Lansing, MI49°Weather in Lincoln, NE58°Weather in Little Rock, AR63°Weather in Madison, WI46°Weather in Montgomery, AL60°Weather in Montpelier, VT57°Weather in Nashville, TN54°Weather in Oklahoma City, OK68°Weather in Olympia, WA44°Weather in Phoenix, AZ71°Weather in Pierre, SD46°Weather in Providence, RI55°Weather in Raleigh, NC55°Weather in Richmond, VA53°Weather in Sacramento, CA55°Weather in Salem, OR48°Weather in Salt Lake City, UT50°Weather in San Juan, PR78°Weather in Santa Fe, NM55°Weather in Springfield, IL57°Weather in St. Paul, MN43°Weather in Tallahassee, FL68°Weather in Topeka, KS65°Weather in Trenton, NJ54°Weather in Washington, DC56°34°Weather in Kila, MT32°Weather in Marion, MT28°Weather in Olney, MT32°Weather in West Glacier, MT35°Weather in Whitewater, MT35°Weather in Zortman, MT30°Weather in Happys Inn, MT33°Weather in Pioneer Junction, MT39°Weather in Stryker, MT32°Weather in Sylvanite, MT33°Weather in Trego, MT31°Weather in White Haven, MT39°Weather in Yaak, MT30°Weather in Babb, MT27°Weather in Santa Rita, MT32°Weather in Turner, MT34°Weather in Sweet Grass, MT30°Weather in Brady, MT34°Weather in Dupuyer, MT31°