| Month | Average (°F) | Record (°F) | Average (inches) | |||
|---|---|---|---|---|---|---|
| High ☀️ | Low 🌙 | High ☀️ | Low 🌙 | Precipitation 💧 | Snow ❄️ | |
| January | 36.8 | 18.9 | 70 | -38 | 0.5 | 6.8 |
| February | 36.4 | 18.4 | 68 | -29 | 0.7 | 8.8 |
| March | 44.2 | 25.5 | 78 | -16 | 1.3 | 10.5 |
| April | 50.4 | 32.0 | 85 | -3 | 2.7 | 11.8 |
| May | 59.8 | 41.6 | 93 | 14 | 4.6 | 2.9 |
| June | 71.2 | 51.9 | 99 | 27 | 3.6 | 0.2 |
| July | 78.7 | 58.9 | 100 | 40 | 3.5 | 0.0 |
| August | 77.4 | 57.9 | 99 | 33 | 2.3 | 0.0 |
| September | 69.2 | 49.6 | 97 | 19 | 1.8 | 0.8 |
| October | 55.5 | 37.2 | 86 | -4 | 1.7 | 4.4 |
| November | 44.6 | 27.2 | 75 | -12 | 0.6 | 5.7 |
| December | 36.7 | 19.8 | 68 | -31 | 0.5 | 6.6 |
| Entire year | 55.2 | 36.8 | 100 | -38 | 23.7 | 59.6 |
|
More Mount Rushmore Weather Records
1962–2024
|
||
|---|---|---|
| Highest daily low | 79 °F | July 19, 2011 |
| Lowest daily high | -21 °F | February 3, 1989 |
| Greatest daily range (Difference of high and low) |
63 °F | December 31, 1990 |
| Greatest difference in daily high over two conscutive days |
48 °F | Jan 31 – Feb 1, 1989 |
| Most daily precipitation | 6.3 inches | June 10, 1972 |
| Most monthly precipitation | 10.9 inches | May 1962 |
| Most yearly precipitation | 39.0 inches | 2019 |
| Most yearly days with precipitation | 150 | 2019 |
| Earliest snow in season | September 7 | 2020 |
| Latest snow in season | June 12 | 1999 |
| Most daily snow | 30.0 inches | April 19, 2000 |
| Most monthly snow | 41.0 inches | April 1984 |
| Most yearly snow | 116.4 inches | 1971 |
| Most snow in a winter | 105.5 inches | 1996–1997 |
| Greatest snow accumulation | 30.0 inches | April 19, 2000 |
| Earliest freeze | September 4 | 1962 |
| Earliest day ≥ 70 °F | January 27 | 2015 |
| Earliest day ≥ 80 °F | April 15 | 1985 |
| Earliest day ≥ 90 °F | May 15 | 1978 |
| Latest freeze | June 16 | 1981 |
| Latest day ≥ 70 °F | November 14 | 1975 |
| Latest day ≥ 80 °F | October 14 | 1964 |
| Latest day ≥ 90 °F | September 17 | 2000 |
| Most days in a year < 0 °F | 32 | 1996 |
| Most days in a year < 32 °F | 167 | 1996 |
| Most days in a year ≥ 80 °F | 86 | 1970 |
| Most days in a year ≥ 90 °F | 28 | 1983 |
| Most days in a year ≥ 100 °F | 3 | 1985 |
|
Mount Rushmore Weather Streaks
Most consecutive days...
|
||
|---|---|---|
| With precipitation | 12 days | Jul 31 – Aug 11, 2013 |
| Without precipitation | 65 days | Oct 19 – Dec 22, 1987 |
| With snow | 6 days | Feb 16–21, 1962 |
| High temperature at or below freezing |
20 days | Feb 15 – Mar 6, 2019 |
| High temperature ≥ 80 °F | 28 days | Jul 4–31, 1974 |
| High temperature ≥ 90 °F | 9 days | Jul 25 – Aug 2, 1987 |
| Years | Station | Coordinates |
|---|---|---|
| 1962–2024 | Mt Rushmore Nmem | location |