August
August · July · September
81climate match
United States · 1991–2020
Best time to visit
Grand Marais.
August leads for comfortable weather in Grand Marais: typically 22.1°C by day, 12.3°C at night, with 66 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortAugust
Typical high22.1°C
Typical low12.3°C
Rain in August66 mm
August
August · July · September
45climate match
August
August · September · July
79climate match
The weakest month is January, scoring 5 against August’s 81 — days reach only -4.6°C, 29° below the 24°C the score treats as ideal.
Month by month
The whole year,
without the guesswork.
The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.
Jan
5-4.6° / -14.7°
Feb
5-2.8° / -13.6°
Mar
51.9° / -7.9°
Apr
127.7° / -1.8°
May
3613.5° / 3.2°
Jun
5117.7° / 6.8°
Jul
7421.9° / 11°
Aug
8122.1° / 12.3°
Sep
5817.9° / 8.6°
Oct
2411.1° / 2.5°
Nov
53.8° / -4.2°
Dec
5-1.9° / -10.7°
| Month | Day | Night | Rain | Wet days | Sea | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|---|
| January | -4.6°C | -14.7°C | 24 mm | 5.3 | 2.2°C | 8 h 48 | 5 | Strong coverage |
| February | -2.8°C | -13.6°C | 17 mm | 3.7 | 1.2°C | 10 h 09 | 5 | Strong coverage |
| March | 1.9°C | -7.9°C | 23 mm | 4 | 1.1°C | 11 h 44 | 5 | Strong coverage |
| April | 7.7°C | -1.8°C | 45 mm | 5.5 | 1.8°C | 13 h 33 | 12 | Strong coverage |
| May | 13.5°C | 3.2°C | 67 mm | 7.4 | 3.0°C | 15 h 07 | 36 | Strong coverage |
| June | 17.7°C | 6.8°C | 91 mm | 8.8 | 4.7°C | 15 h 59 | 51 | Strong coverage |
| July | 21.9°C | 11°C | 86 mm | 8.4 | 10.6°C | 15 h 38 | 74 | Strong coverage |
| August | 22.1°C | 12.3°C | 66 mm | 7.3 | 15.8°C | 14 h 17 | 81 | Strong coverage |
| September | 17.9°C | 8.6°C | 76 mm | 8.5 | 13.2°C | 12 h 30 | 58 | Strong coverage |
| October | 11.1°C | 2.5°C | 78 mm | 8 | 8.8°C | 10 h 45 | 24 | Strong coverage |
| November | 3.8°C | -4.2°C | 47 mm | 5.7 | 5.7°C | 9 h 12 | 5 | Strong coverage |
| December | -1.9°C | -10.7°C | 33 mm | 5.9 | 3.8°C | 8 h 26 | 5 | Strong coverage |
What has changed
Grand Marais runs +0.1°C
on the 1961–1990 baseline.
Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.
Jan
+0.7
Feb
-0.7
Mar
-0.2
Apr
-1.8
May
-0.3
Jun
+0.2
Jul
+0.4
Aug
+0.1
Sep
+1.1
Oct
+0.5
Nov
+0.3
Dec
+1.3
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 10.0°C9 Jan 1915 | -36.7°C23 Jan 1935 | 41 mm1 Jan 1935 | 98 mm1969 · driest 0 mm in 1930 | 106 |
| February | 14.4°C25 Feb 1976 | -36.7°C9 Feb 1933 | 36 mm19 Feb 1924 | 90 mm1939 · driest 1 mm in 1993 | 106 |
| March | 19.4°C28 Mar 1986 | -31.1°C2 Mar 1943 | 56 mm29 Mar 1938 | 113 mm1979 · driest 0 mm in 1930 | 106 |
| April | 28.3°C29 Apr 1965 | -22.2°C1 Apr 1975 | 67 mm17 Apr 1967 | 174 mm2001 · driest 2 mm in 1987 | 108 |
| May | 31.1°C29 May 1986 | -8.3°C9 May 1947 | 71 mm5 May 1950 | 148 mm1964 · driest 9 mm in 1976 | 108 |
| June | 33.9°C29 Jun 1970 | -3.9°C12 Jun 1947 | 138 mm29 Jun 1996 | 233 mm1944 · driest 1 mm in 1995 | 106 |
| July | 37.2°C12 Jul 1925 | -2.2°C4 Jul 1950 | 95 mm20 Jul 2011 | 211 mm1993 · driest 22 mm in 1989 | 108 |
| August | 37.8°C7 Aug 1930 | 0.6°C1 Aug 1947 | 74 mm1 Aug 1987 | 199 mm1988 · driest 17 mm in 1930 | 110 |
| September | 32.2°C1 Sep 1929 | -5.0°C28 Sep 1942 | 89 mm10 Sep 1961 | 190 mm1977 · driest 7 mm in 2024 | 111 |
| October | 25.0°C15 Oct 1962 | -14.4°C26 Oct 1936 | 65 mm9 Oct 1968 | 234 mm2007 · driest 6 mm in 1962 | 109 |
| November | 19.4°C6 Nov 2001 | -25.6°C30 Nov 1976 | 76 mm12 Nov 2021 | 109 mm1938 · driest 0 mm in 1916 | 109 |
| December | 20.6°C7 Dec 1913 | -36.7°C26 Dec 1917 | 45 mm16 Dec 1984 | 100 mm2022 · driest 0 mm in 1913 | 110 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 30 | <1 | 6 |
| February | 0 | 0 | 27 | <1 | 5 |
| March | 0 | 0 | 29 | <1 | 3 |
| April | <1 | 0 | 21 | 2 | 2 |
| May | <1 | 0 | 5 | 2 | 0 |
| June | 2 | <1 | <1 | 3 | 0 |
| July | 9 | 1 | 0 | 3 | 0 |
| August | 7 | <1 | 0 | 2 | 0 |
| September | 1 | <1 | <1 | 3 | 0 |
| October | 0 | 0 | 10 | 2 | <1 |
| November | 0 | 0 | 23 | 2 | 2 |
| December | 0 | 0 | 29 | <1 | 5 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 19% | 2% | 17% | -8.7–-1.4°C |
| February | 0% | 15% | 2% | 11% | -7.0–0.5°C |
| March | 0% | 16% | 3% | 15% | -1.2–3.8°C |
| April | 1% | 20% | 5% | 20% | 5.2–10.0°C |
| May | 8% | 25% | 7% | 28% | 11.0–15.3°C |
| June | 21% | 30% | 10% | 37% | 15.5–19.4°C |
| July | 47% | 27% | 8% | 29% | 19.2–24.1°C |
| August | 53% | 26% | 7% | 28% | 19.5–23.7°C |
| September | 20% | 29% | 9% | 34% | 14.8–19.1°C |
| October | 2% | 23% | 6% | 23% | 8.8–13.7°C |
| November | 0% | 20% | 4% | 18% | 1.0–6.2°C |
| December | 0% | 18% | 3% | 14% | -5.9–0.8°C |
A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.
The evidence behind this page
Nearby, measured,
and named.
- Place identity
- GeoNames 5028500
- NOAA station
- USC00213282 · GRAND MARAIS
- Station distance
- 0.5 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 28 usable years
- Daylight
- Calculated from latitude 47.75°, mid-month, sunrise to sunset including refraction. Not a station measurement.
- Sea temperature
- NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 14 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.