Grand Marais, MI Climate: Temperature by Month
Average temperature and precipitation from NOAA NCEI 1991–2020 normals →, with a derived climate comfort score
30-year climate normals (1991-2020) from Grand Marais's primary NOAA station, GRAND MARAIS 2 E.
The climate verdict for Grand Marais
Grand Marais, Michigan has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 43°F. August is the warmest month at 65°F and January the coldest at 19°F.
- 43°F
- average temperature, NOAA 1991-2020 normal
- 136 days
- frost-free days per growing season
Grand Marais: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00014859 · Grand Marais, MI 43°F mean
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-UNK · SWING-WIDE · COMF-UNK · LOAD-HEAT · STN-1 · BOOK-PART
- TEMP-COOL 43°F
- RANK-COOL #755
- PHOTO-FINISH ≈ Pellston Rgnl
- PRCP-UNK Rain n/a
- SWING-WIDE 47°F
- COMF-UNK Comfort n/a
- LOAD-HEAT 8,394 HDD
- STN-1 USW00014859
- BOOK-PART 4/6 fields
Nearest mean-temperature peer: Pellston Rgnl, MI (+ 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 MI station list.
- Grand Marais (this station) 43°F
- Cold Morrisville Sto…, VT 43°F
- Hot Marquette, MI 43°F
- Near Pellston Rgnl, MI 43°F
- Near Jefferson, NH 43°F
Climate Living Index · Grand Marais
Grand Marais: 20/100 · grade F
Grand Marais publishes 3 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 3 missing weights rescale to 100.
PlainClimate-derived for Grand Marais, not an official NOAA rating. Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 171 calendar days | 31/100 · F |
| Frost-free season | 136 days/year | 16/100 · F |
| Annual temperature balance | 42.6°F · 24.9° from 67.5°F | 11/100 · F |
Grand Marais · 2026-08-04 · NOAA NCEI Climate Normals · method .
National standing · heating-led station
Where Grand Marais sits across the climate record
Available NOAA 1991–2020 fields for Grand Marais are ranked only against stations that publish the same field, missing metrics stay blank rather than estimated.
- Annual temperature
- Cooler than 89%
- Among 6,861 stations, Grand Marais sits in the cooler third of annual means.
- Seasonal temperature swing
- 67th percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 24°F (-4°C) | 14°F (-10°C) | 19°F (-7°C) | N/A | 31.0 | 0.0 |
| February | 27°F (-3°C) | 13°F (-10°C) | 20°F (-7°C) | N/A | 27.9 | 0.0 |
| March | 37°F (3°C) | 20°F (-7°C) | 28°F (-2°C) | N/A | 29.3 | 0.0 |
| April | 48°F (9°C) | 28°F (-2°C) | 38°F (3°C) | N/A | 24.0 | 0.0 |
| May | 61°F (16°C) | 40°F (4°C) | 50°F (10°C) | N/A | 10.2 | 0.2 |
| June | 70°F (21°C) | 48°F (9°C) | 59°F (15°C) | N/A | 2.0 | 1.7 |
| July | 75°F (24°C) | 55°F (13°C) | 65°F (18°C) | N/A | 0.1 | 1.5 |
| August | 75°F (24°C) | 56°F (13°C) | 65°F (19°C) | N/A | 0.1 | 0.8 |
| September | 68°F (20°C) | 50°F (10°C) | 59°F (15°C) | N/A | 1.3 | 0.4 |
| October | 55°F (13°C) | 39°F (4°C) | 47°F (8°C) | N/A | 10.4 | 0.0 |
| November | 41°F (5°C) | 29°F (-2°C) | 35°F (2°C) | N/A | 23.9 | 0.0 |
| December | 31°F (-1°C) | 20°F (-7°C) | 25°F (-4°C) | N/A | 30.6 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 76°F around August 2, short of 90°F on every date, while 171 dates carry a normal low at or below freezing, the coldest 12°F near January 29.
The freezing stretch
The normal low stays at or below 32°F into April 25, then returns to freezing around November 7, covering 171 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.
The widest day
June 5 carries the biggest normal gap between afternoon and dawn, 22°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Grand Marais.
Where Grand Marais Stands Nationally
Days and nights track unusually close together; the widest normal swing, about 22°F, is narrower than most stations record.
Grand Marais earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall
Frost Dates & Growing Season
First Fall Freeze
October 10
50% probability date
Last Spring Freeze
May 27
50% probability date
Growing Season
136 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
8,394
Higher = more heating needed
Cooling Degree Days
247
Higher = more cooling needed
Warmest Month
August
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside MI closest to Grand Marais 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 (43°F here).
- Alamosa, CO 43°F · 0.0°F off
- Baldwin, WI 43°F · 0.0°F off
- Boulder, MT 43°F · 0.0°F off
- Center, ND 43°F · 0.0°F off
Data-derived climate profile
How Grand Marais's climate pattern fits together
heating led · mid swing
Grand Marais's energy balance leans toward cold weather: 8,394 annual heating degree days against 247 for cooling. Its 46.5°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 136 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.
August and January mark the typical warm and cold ends of the calendar in Grand Marais's middle-range seasonal profile. The measured spread is 46.5°F. The annual average is 43°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
A moisture-range label is withheld because Grand Marais's annual precipitation total is unavailable. Monthly source values remain visible where NOAA provides them, and no annual amount is reconstructed from incomplete data.
These labels group NOAA 1991-2020 normals from Grand Marais's primary station, so the winter figures are a thirty-year average and not a floor: a single hard season can run well below them. Treat each band as a descriptive range for Grand Marais, not an official NOAA class or a year-ahead forecast.
Questions about Grand Marais's climate
How cold does Grand Marais get in winter? ▼
How much energy does heating and cooling require in Grand Marais? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Grand Marais's primary station: GRAND MARAIS 2 E (USW00014859). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as a census-designated place (GEOID 2633440), not an incorporated municipality. Match rule for Grand Marais: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Grand Marais 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.