| Month | Average (°F) | Record (°F) | Average (inches) | |||
|---|---|---|---|---|---|---|
| High ☀️ | Low 🌙 | High ☀️ | Low 🌙 | Precipitation 💧 | Snow ❄️ | |
| January | 24.0 | 4.3 | 57 | -35 | 1.4 | 13.9 |
| February | 28.3 | 6.0 | 65 | -39 | 1.2 | 11.1 |
| March | 39.3 | 16.8 | 82 | -27 | 1.7 | 8.9 |
| April | 52.0 | 29.0 | 94 | -6 | 2.8 | 6.8 |
| May | 66.3 | 41.8 | 100 | 16 | 3.5 | 0.2 |
| June | 76.1 | 52.0 | 100 | 24 | 3.7 | 0.0 |
| July | 80.4 | 56.6 | 104 | 35 | 3.5 | 0.0 |
| August | 78.3 | 55.1 | 101 | 30 | 3.3 | 0.0 |
| September | 70.2 | 47.0 | 98 | 19 | 3.6 | 0.0 |
| October | 55.7 | 35.0 | 88 | 8 | 3.3 | 0.8 |
| November | 40.8 | 24.2 | 77 | -10 | 1.9 | 5.4 |
| December | 29.1 | 12.8 | 64 | -26 | 1.7 | 13.1 |
| Entire year | 53.4 | 31.8 | 104 | -39 | 31.2 | 60.9 |
|
More Iron Mountain Weather Records
1899–2024
|
||
|---|---|---|
| Highest daily low | 85 °F | July 27, 1919 |
| Lowest daily high | -15 °F | January 18, 1994 |
| Greatest daily range (Difference of high and low) |
59 °F | May 1, 1926 |
| Greatest difference in daily high over two conscutive days |
55 °F | Mar 9–10, 2000 |
| Most daily precipitation | 4.1 inches | August 29, 1941 |
| Most monthly precipitation | 11.4 inches | July 1999 |
| Most yearly precipitation | 45.4 inches | 1951 |
| Most yearly days with precipitation | 148 | 2017 |
| Earliest snow in season | September 26 | 1965 |
| Latest snow in season | May 29 | 1947 |
| Most daily snow | 17.0 inches | January 4, 1971 |
| Most monthly snow | 43.7 inches | February 2019 |
| Most yearly snow | 111.4 inches | 1972 |
| Most snow in a winter | 128.5 inches | 1938–1939 |
| Greatest snow accumulation | 50.0 inches | March 18, 1939 |
| Earliest freeze | August 26 | 1945 |
| Earliest day ≥ 70 °F | March 8 | 2000 |
| Earliest day ≥ 80 °F | March 18 | 2012 |
| Earliest day ≥ 90 °F | April 22 | 1980 |
| Earliest day ≥ 100 °F | May 31 | 1934 |
| Latest freeze | June 21 | 1992 |
| Latest day ≥ 70 °F | November 14 | 1999 |
| Latest day ≥ 80 °F | October 27 | 1927 |
| Latest day ≥ 90 °F | September 22 | 1908 |
| Latest day ≥ 100 °F | August 5 | 1947 |
| Most days in a year < 0 °F | 65 | 2014 |
| Most days in a year < 32 °F | 200 | 1907 |
| Most days in a year ≥ 80 °F | 79 | 1921 |
| Most days in a year ≥ 90 °F | 27 | 1988 |
| Most days in a year ≥ 100 °F | 6 | 1936 |
|
Iron Mountain Weather Streaks
Most consecutive days...
|
||
|---|---|---|
| With precipitation | 14 days | Sep 26 – Oct 9, 2002 |
| Without precipitation | 35 days | Oct 7 – Nov 10, 1953 |
| With snow | 8 days | Nov 29 – Dec 6, 1985 |
| High temperature at or below freezing |
68 days | Dec 17, 1978 – Feb 22, 1979 |
| High temperature ≥ 80 °F | 45 days | Jun 16 – Jul 30, 1921 |
| High temperature ≥ 90 °F | 8 days | Jul 7–14, 1936 |
| High temperature ≥ 100 °F | 4 days | Jul 10–13, 1936 |
| Years | Station | Coordinates |
|---|---|---|
| 1899–2024 | Iron Mountain | location |