Port of Morgan, MT Climate: Temperature & Rain by Month
Temperature and precipitation from NOAA NCEI 1991–2020 normals →, plus PlainClimate's derived comfort score
30-year climate normals (1991-2020) from Port of Morgan's primary NOAA station, PORT OF MORGAN.
The climate verdict for Port of Morgan
Dryness leads the climate profile for Port of Morgan, Montana, with 12.6 inches of precipitation a year. NOAA records an annual average of 42°F. At 39/100 (below average) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 4% of scores.
- 42°F
- average temperature, NOAA 1991-2020 normal
- 39/100
- comfort score, above 4% of station-mapped location scores
- 12.6"
- annual precipitation · 23" snow
- 126 days
- frost-free days per growing season
Port of Morgan: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00246672 · Port of Morgan, MT 42°F mean · 12.6" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-DRY · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 42°F
- RANK-COOL #549
- PHOTO-FINISH ≈ Rice
- PRCP-DRY 12.6"
- SWING-WIDE 55°F
- COMF-LOW 39/100
- LOAD-HEAT 8,838 HDD
- STN-1 USC00246672
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Rice, MN (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every MT station list.
- Port of Morgan (this station) 42°F
- Hot Rice, MN 42°F
- Near Hayward, WI 42°F
- Cold Rhinelander One…, WI 41°F
- Near Antigo, WI 41°F
Port of Morgan sits in Montana, the #6 coldest U.S. state at 43.4°F statewide annual average - see all 50 coldest states ranked by NOAA normals
Climate Living Index · Port of Morgan
Port of Morgan: 17/100 · grade F
Port of Morgan publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Port of Morgan, not an official NOAA rating. Rankings still use Comfort Score 39/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Snowfall burden | 22.9 inches/year | 46/100 · D |
| Precipitation balance | 12.6 in · 22.4 from 35 in | 20/100 · F |
| Normal heat + freeze calendar | 194 calendar days | 17/100 · F |
| Frost-free season | 126 days/year | 10/100 · F |
| Annual temperature balance | 41.6°F · 25.9° from 67.5°F | 8/100 · F |
Port of Morgan · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Port of Morgan's normals sit in a dry climate class: BSk
Precipitation is low relative to temperature but above true desert thresholds: cold semi-arid steppe (BSk). Class BSk is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: dry (arid or semi-arid), specifically cold semi-arid steppe.
- Köppen code
- BSk
- Group
- Dry (arid or semi-arid)
- Warmest month
- 68.4°F
- Coldest month
- 13.5°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Port of Morgan sits across the climate record
Three NOAA fields for Port of Morgan's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 92%
- Among 6,861 stations, Port of Morgan sits in the cooler third of annual means.
- Annual precipitation
- Drier than 88%
- Port of Morgan's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Wider than 92%
- Warmest-to-coldest month gap for Port of Morgan is large versus 6,861 complete station-years.
How Port of Morgan compares across U.S. station-mapped locations
Port of Morgan's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
39 4th percentile score exceeds 4% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). This entry sits in this band.
- 40–50: 1,113 station-mapped locations (18%). Above this entry.
- 50–60: 1,329 station-mapped locations (21%). Above this entry.
- 60–70: 1,236 station-mapped locations (20%). Above this entry.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 23°F (-5°C) | 4°F (-15°C) | 14°F (-10°C) | 0.5" | 3.5" | 30.5 | 0.0 |
| February | 28°F (-2°C) | 8°F (-13°C) | 18°F (-8°C) | 0.2" | 3.0" | 27.4 | 0.0 |
| March | 40°F (5°C) | 18°F (-8°C) | 29°F (-1°C) | 0.3" | 4.6" | 28.2 | 0.0 |
| April | 56°F (13°C) | 30°F (-1°C) | 43°F (6°C) | 0.9" | 1.4" | 18.1 | 0.0 |
| May | 67°F (19°C) | 39°F (4°C) | 53°F (12°C) | 1.8" | 0.6" | 6.8 | 0.0 |
| June | 74°F (23°C) | 48°F (9°C) | 61°F (16°C) | 3.0" | 0.0" | 0.1 | 0.9 |
| July | 83°F (28°C) | 54°F (12°C) | 68°F (20°C) | 1.8" | 0.0" | 0.0 | 6.7 |
| August | 83°F (28°C) | 52°F (11°C) | 68°F (20°C) | 1.3" | 0.0" | 0.0 | 6.8 |
| September | 72°F (22°C) | 43°F (6°C) | 57°F (14°C) | 1.3" | 0.3" | 2.8 | 1.2 |
| October | 56°F (13°C) | 31°F (-1°C) | 43°F (6°C) | 0.8" | 1.8" | 17.5 | 0.0 |
| November | 38°F (4°C) | 19°F (-7°C) | 28°F (-2°C) | 0.4" | 3.6" | 27.1 | 0.0 |
| December | 26°F (-3°C) | 8°F (-14°C) | 17°F (-8°C) | 0.4" | 4.1" | 30.6 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 86°F around July 29, short of 90°F on every date, while 194 dates carry a normal low at or below freezing, the coldest 4°F near January 4.
The freezing stretch
The normal low stays at or below 32°F into April 23, then returns to freezing around October 13, covering 194 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
Where the wet dates fall
The likeliest wet date is June 10, when 38% of years recorded at least a hundredth of an inch. The driest is March 5 at 11%. Summed across the calendar, that is about 68 wet dates a year.
The widest day
August 7 carries the biggest normal gap between afternoon and dawn, 31°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Port of Morgan.
Where Port of Morgan Stands Nationally
Freezing is routine here by normals standards — the normal low reaches 32°F or colder on about 194 nights a year, more than most ranked stations.
A drier-than-most normal water year — around 13 inches, below what four out of five ranked stations collect.
Port of Morgan earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 3.5"
3.7 days with precipitation
Snow: 3.0"
3.5 days with precipitation
Snow: 4.6"
3.3 days with precipitation
Snow: 1.4"
5.3 days with precipitation
Snow: 0.6"
8.5 days with precipitation
11.5 days with precipitation
7.4 days with precipitation
6.3 days with precipitation
Snow: 0.3"
5.8 days with precipitation
Snow: 1.8"
4.6 days with precipitation
Snow: 3.6"
3.8 days with precipitation
Snow: 4.1"
3.7 days with precipitation
Port of Morgan runs a summer-peaked wet season
49% of Port of Morgan's yearly precipitation falls in June, July and August alone, against the 25% an evenly spread year would give those three months. The wettest month is June at 3.0", on a wide 54.9°F gap between its warmest and coldest month. Warm-season convection and, across the Southwest, the North American monsoon produce this shape: rain arrives in short heavy bursts during the hottest part of the year rather than as long cool-season soaking.
- Wettest three months: June, May, July, taking 53% of the annual total between them.
- Driest month: February at 0.2".
- Winter share: 8% falls in December, January and February.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. A summer-peaked label means the June-August share reaches 35%; it describes timing across an average year, not any single season, and says nothing about how heavy an individual storm can be.
Port of Morgan is dry, and what does fall arrives gently
Only about 67 days a year record measurable precipitation here, 18% of the calendar, and they carry 12.6" between them. At roughly 0.19 inches on an average wet day, this is not the damp drizzle of a marine climate; it is an arid record in which precipitation is both uncommon and light when it appears.
The wettest month by count is June at about 12 wet days; the driest is March at about 3.
A low per-event average in a dry record is a statement about typical days only. Arid regions can still take a large share of a year's total from a single convective storm, which a normal cannot show.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, not the extremes within it.
Winter brings real snow to Port of Morgan
Port of Morgan averages 22.9 inches of snowfall a year, with March the snowiest month on the normals, spread across roughly 16 days that record measurable snow. That is depth accumulating on the ground, which is why it can exceed the annual precipitation figure: precipitation counts the liquid the snow melts down to, and fresh snow is mostly air.
- Annual snowfall: 22.9 inches of depth.
- Days recording measurable snow: about 16 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 18% of the year's precipitation.
NOAA 1991-2020 normals. The ten-to-one ratio is a convention, not a measurement: real ratios vary with temperature, so treat the share as an order of magnitude rather than an exact split.
Frost Dates & Growing Season
First Fall Freeze
September 22
50% probability date
Last Spring Freeze
May 19
50% probability date
Growing Season
126 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
8,838
Higher = more heating needed
Cooling Degree Days
339
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside MT closest to Port of Morgan on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (42°F here).
- Cripple Creek, CO 42°F · 0.0°F off
- Greenland, MI 42°F · 0.0°F off
- Johnson, VT 42°F · 0.0°F off
- Maybell, CO 42°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (12.6" here), excluding temperature-peer places.
- Palmer, AK 12.6" · 0.0" off
- San Manuel, AZ 12.6" · 0.0" off
- Kermit, TX 12.6" · 0.0" off
- Fence Lake, NM 12.6" · 0.0" off
Snow and freeze rhythm
When cold and snow define Port of Morgan
heating led · dry · mid swing
Port of Morgan's energy balance leans toward cold weather: 8,838 annual heating degree days against 339 for cooling. Its 54.9°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 126 days are frost-free in a normal year. That short interval is consistent with the cold-season signal, but the measure does not predict the exact first or last freeze in any one year.
-
1. Port of Morgan coldest normal
January
Averaging 14°F (-10°C), this month sits below freezing for the month as a whole, not merely overnight.
-
2. Port of Morgan typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Port of Morgan snow peak
March
Port of Morgan averages 22.9 inches of snow a year, with March the snowiest month on the normals.
Questions about Port of Morgan's climate
How much snow does Port of Morgan get? ▼
How cold does Port of Morgan get in winter? ▼
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Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Port of Morgan's primary station: PORT OF MORGAN (USC00246672). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Port of Morgan; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Port of Morgan comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.