Spearfish Weather in July
Average highs run from 81°F on July 1 to 85°F on July 31, and lows from 55°F to 59°F. Normal precipitation for the month is 2.35 in over about 9 wet days.
July day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
July at a glance
- Average high
- 84°F
- Average low
- 58°F
- Precipitation
- 2.35 in
- Record high
- 110°FJul 6, 1936
- Record low
- 33°FJul 15, 1906
- Chance of a freeze
- 0%
- Days of 90°F or more
- 11.0
- Daylight
- 15 h 29 min to 14 h 41 min
- Cloud cover
- 47%
- Humidity
- 52%
- Dew point
- 51°F
- Wind
- 6.9 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Jul 1 | 81°F | 55°F | 104°F 1990 | 40°F 1906 | 34% | 0% |
| Jul 2 | 81°F | 55°F | 103°F 1990 | 37°F 1905 | 34% | 0% |
| Jul 3 | 81°F | 56°F | 108°F 1936 | 42°F 1906 | 34% | 0% |
| Jul 4 | 82°F | 56°F | 103°F 1936 | 40°F 1915 | 33% | 0% |
| Jul 5 | 82°F | 56°F | 108°F 1936 | 38°F 1915 | 33% | 0% |
| Jul 6 | 82°F | 56°F | 110°F 1936 | 42°F 1919 | 33% | 0% |
| Jul 7 | 82°F | 57°F | 105°F 1973 | 36°F 1920 | 32% | 0% |
| Jul 8 | 83°F | 57°F | 101°F 1981 | 35°F 1920 | 32% | 0% |
| Jul 9 | 83°F | 57°F | 106°F 1954 | 37°F 1920 | 32% | 0% |
| Jul 10 | 83°F | 57°F | 107°F 1933 | 42°F 1920 | 31% | 0% |
| Jul 11 | 83°F | 57°F | 105°F 1939 | 44°F 1898 | 31% | 0% |
| Jul 12 | 84°F | 58°F | 103°F 1973 | 42°F 1906 | 31% | 0% |
| Jul 13 | 84°F | 58°F | 103°F 2026 | 35°F 1950 | 31% | 0% |
| Jul 14 | 84°F | 58°F | 103°F 1988 | 40°F 1906 | 30% | 0% |
| Jul 15 | 84°F | 58°F | 109°F 2006 | 33°F 1906 | 30% | 0% |
| Jul 16 | 84°F | 58°F | 105°F 2005 | 35°F 1906 | 30% | 0% |
| Jul 17 | 84°F | 58°F | 102°F 1977 | 37°F 1906 | 30% | 0% |
| Jul 18 | 84°F | 58°F | 103°F 1931 | 45°F 2014 | 30% | 0% |
| Jul 19 | 85°F | 58°F | 103°F 2004 | 43°F 1915 | 30% | 0% |
| Jul 20 | 85°F | 58°F | 104°F 1939 | 47°F 1902 | 29% | 0% |
| Jul 21 | 85°F | 59°F | 103°F 2016 | 41°F 1942 | 29% | 0% |
| Jul 22 | 85°F | 59°F | 101°F 1893 | 44°F 1906 | 29% | 0% |
| Jul 23 | 85°F | 59°F | 106°F 1936 | 42°F 1952 | 29% | 0% |
| Jul 24 | 85°F | 59°F | 104°F 1931 | 45°F 1906 | 29% | 0% |
| Jul 25 | 85°F | 59°F | 109°F 1936 | 40°F 1899 | 29% | 0% |
| Jul 26 | 85°F | 59°F | 105°F 1987 | 38°F 1920 | 28% | 0% |
| Jul 27 | 85°F | 59°F | 105°F 1931 | 46°F 1915 | 28% | 0% |
| Jul 28 | 85°F | 59°F | 109°F 2006 | 44°F 1971 | 28% | 0% |
| Jul 29 | 85°F | 59°F | 105°F 1933 | 45°F 1899 | 28% | 0% |
| Jul 30 | 85°F | 59°F | 104°F 2006 | 43°F 1920 | 28% | 0% |
| Jul 31 | 85°F | 59°F | 102°F 1900 | 45°F 1915 | 27% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MDT).
- July 1
- sunrise 5:15 AM, sunset 8:44 PM
- July 31
- sunrise 5:41 AM, sunset 8:22 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00397882 (Spearfish), public domain. Records: NOAA GHCN-Daily, station USC00397882, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.