Rapid City Forrest Threshold Days by Year
17 fixed thresholds counted per year at Rapid City Forrest (CA005012333): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Rapid City Forrest Thresholds
- Rapid City Forrest: days with 10 mm (0.39 in) or more of precipitation in 46 years, most in 1890 with 24.
- Rapid City Forrest: days with 25 mm (0.98 in) or more of precipitation in 43 years, most in 1898 with 7.
- Rapid City Forrest: days with 10 cm (3.9 in) or more of snowfall in 43 years, most in 1897 with 8.
- Rapid City Forrest: days with a maximum temperature at or below 0 C (32 F) in 15 years, most in 1932 with 145.
- 17 fixed thresholds have at least one qualifying day at Rapid City Forrest.
Days at or above 30 C (86 F)
13 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1923 | 5 | 7.4 |
| 1925 | 6 | 7.4 |
| 1926 | 8 | 7.4 |
| 1928 | 6 | 7.4 |
| 1929 | 12 | 7.4 |
| 1930 | 9 | 14.1 |
| 1931 | 20 | 14.1 |
| 1932 | 5 | 14.1 |
| 1933 | 20 | 14.1 |
| 1934 | 15 | 14.1 |
| 1935 | 4 | 14.1 |
| 1936 | 30 | 14.1 |
| 1937 | 10 | 14.1 |
| Year | First date | Last date |
|---|---|---|
| 1923 | 1923-06-17 | 1923-09-03 |
| 1925 | 1925-05-29 | 1925-09-02 |
| 1926 | 1926-06-27 | 1926-07-31 |
| 1928 | 1928-05-22 | 1928-09-01 |
| 1929 | 1929-06-16 | 1929-08-30 |
| 1930 | 1930-07-08 | 1930-08-30 |
| 1931 | 1931-05-14 | 1931-09-08 |
| 1932 | 1932-05-13 | 1932-08-19 |
| 1933 | 1933-05-31 | 1933-08-22 |
| 1934 | 1934-05-05 | 1934-08-17 |
| 1935 | 1935-07-28 | 1935-08-14 |
| 1936 | 1936-05-27 | 1936-09-03 |
| 1937 | 1937-06-23 | 1937-08-27 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 13 | 30 | 1936 | 10 |
| 35 C (95 F): Days | 7 | 7 | 1931 | 1 |
| 40 C (104 F): Days | 2 | 1 | 1931 | 1 |
| 90 F (32.2 C): Days | 13 | 16 | 1936 | 4 |
| 100 F (37.8 C): Days | 2 | 1 | 1931 | 1 |
| 0 C (32 F): Ice days (max | 15 | 145 | 1932 | 139 |
| 0 C (32 F): Frost days (min | 15 | 227 | 1929 | 198 |
| -10 C (14 F): Days with min | 15 | 142 | 1935 | 115 |
| -20 C (-4 F): Days with min | 15 | 89 | 1936 | 56 |
| -30 C (-22 F): Days with min | 15 | 46 | 1936 | 12 |
| -40 C (-40 F): Days with min | 6 | 11 | 1936 | 11 |
| 20 C (68 F): Tropical nights (min | 3 | 4 | 1936 | 4 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 46 | 24 | 1890 | 13 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 43 | 7 | 1898 | 1 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 13 | 3 | 1911 | 2 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 43 | 8 | 1897 | 6 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 15 | 2 | 1894 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1923.
Download the Data
Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Threshold counts are computed by this site.
Data as of . Last revised (2026-10-17).