| Month | Average (°F) | Record (°F) | Average (inches) | |||
|---|---|---|---|---|---|---|
| High ☀️ | Low 🌙 | High ☀️ | Low 🌙 | Precipitation 💧 | Snow ❄️ | |
| January | 37.2 | 16.9 | 79 | -32 | 0.6 | 8.4 |
| February | 37.7 | 17.2 | 75 | -33 | 1.0 | 12.3 |
| March | 48.2 | 26.4 | 82 | -27 | 1.3 | 11.0 |
| April | 56.2 | 34.1 | 91 | -8 | 2.0 | 7.7 |
| May | 66.2 | 43.8 | 96 | 11 | 3.5 | 2.2 |
| June | 77.3 | 53.9 | 105 | 25 | 3.8 | 0.0 |
| July | 85.1 | 59.7 | 110 | 33 | 2.3 | 0.0 |
| August | 84.1 | 58.0 | 104 | 32 | 2.0 | 0.0 |
| September | 75.3 | 49.7 | 105 | 15 | 1.6 | 0.1 |
| October | 58.7 | 37.2 | 95 | -7 | 1.8 | 5.1 |
| November | 47.3 | 26.8 | 85 | -23 | 0.7 | 6.3 |
| December | 37.7 | 19.1 | 73 | -30 | 0.8 | 11.4 |
| Entire year | 59.6 | 37.1 | 110 | -33 | 21.2 | 63.8 |
|
More Spearfish Weather Records
1893–2024
|
||
|---|---|---|
| Highest daily low | 88 °F | July 23, 1936 |
| Lowest daily high | -19 °F | December 20, 1990 |
| Greatest daily range (Difference of high and low) |
79 °F | February 4, 2019 |
| Greatest difference in daily high over two conscutive days |
65 °F | Feb 4–5, 2019 |
| Most daily precipitation | 6.5 inches | May 11, 1922 |
| Most monthly precipitation | 14.1 inches | May 1982 |
| Most yearly precipitation | 42.4 inches | 1946 |
| Most yearly days with precipitation | 132 | 2019 |
| Earliest snow in season | September 10 | 1955 |
| Latest snow in season | May 31 | 1917 |
| Most daily snow | 48.0 inches | March 22, 1894 |
| Most monthly snow | 64.0 inches | March 1894 |
| Most yearly snow | 149.8 inches | 1944 |
| Most snow in a winter | 142.4 inches | 1919–1920 |
| Greatest snow accumulation | 38.0 inches | March 31, 1977 |
| Earliest freeze | September 4 | 1962 |
| Earliest day ≥ 80 °F | March 11 | 1972 |
| Earliest day ≥ 90 °F | April 4 | 1921 |
| Earliest day ≥ 100 °F | June 11 | 2016 |
| Latest freeze | June 5 | 1920 |
| Latest day ≥ 80 °F | November 18 | 1908 |
| Latest day ≥ 90 °F | October 22 | 1897 |
| Latest day ≥ 100 °F | September 8 | 1980 |
| Most days in a year < 0 °F | 46 | 1916 |
| Most days in a year < 32 °F | 203 | 1920 |
| Most days in a year ≥ 80 °F | 129 | 1936 |
| Most days in a year ≥ 90 °F | 74 | 1936 |
| Most days in a year ≥ 100 °F | 22 | 1936 |
| Most days in a year ≥ 110 °F | 1 | 1936 |
|
Spearfish Weather Streaks
Most consecutive days...
|
||
|---|---|---|
| With precipitation | 11 days | Jun 6–16, 1943 |
| Without precipitation | 75 days | Dec 15, 1988 – Feb 27, 1989 |
| With snow | 7 days | Feb 29 – Mar 6, 1996 |
| High temperature at or below freezing |
24 days | Feb 15 – Mar 10, 2019 |
| High temperature ≥ 80 °F | 60 days | Jun 27 – Aug 25, 2006 |
| High temperature ≥ 90 °F | 15 days | Jul 13–27, 1931 |
| High temperature ≥ 100 °F | 5 days | Jul 27–31, 2006 |
| Years | Station | Coordinates |
|---|---|---|
| 1893–2024 | Spearfish | location |