Rapid City weather in July: Rapid City, South Dakota: normal highs, lows, rain and records for July
Rapid City in July has a normal high of 86°F and a normal low of 59°F, a daily mean of 72°F, rising from 83°F on the 1st to 88°F by the 31st. Measurable precipitation falls on 10 days in a normal July, 2.28 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 30°C and low of 15°C, 58 mm of precipitation in July.
- NOAA stationRapid City Regional Airport
- Station IDUSW00024090
- Location44.04°N 103.05°W
- Elevation3,160 ft (963 m)
- Population79,894
- Jan 36° 13°
- Feb 38° 14°
- Mar 48° 23°
- Apr 57° 31°
- May 67° 42°
- Jun 78° 52°
- Jul 86° 59°
- Aug 85° 56°
- Sep 76° 46°
- Oct 60° 34°
- Nov 47° 22°
- Dec 37° 14°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Rapid City in July?
The normal high is 86°F and the normal low 59°F, for a daily mean of 72.4°F. July is 7.8°F warmer than June and 1.6°F warmer than August. July is the warmest month of the year in Rapid City and the 3rd wettest. Across the month the normal high rises 5°F, from 83°F on July 1 to 88°F on July 31. From one year to the next July's mean temperature typically moves about 3.7°F either way (NOAA's standard deviation), so roughly two Julys in three average between 69°F and 76°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 36%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| July 1 | 83°F | 56°F | 36% | 18% |
| July 8 | 85°F | 58°F | 34% | 16% |
| July 15 | 87°F | 59°F | 32% | 15% |
| July 22 | 88°F | 60°F | 31% | 15% |
| July 31 | 88°F | 60°F | 29% | 14% |
Every day of July: normal high, low and chance of precipitation (warmest afternoon July 24, coldest night July 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| July 1 | 83°F | 56°F | 36% | 18% | 15 h 30 min |
| July 2 | 83°F | 56°F | 36% | 17% | 15 h 30 min |
| July 3 | 84°F | 56°F | 35% | 17% | 15 h 30 min |
| July 4 | 84°F | 57°F | 35% | 17% | 15 h 20 min |
| July 5 | 84°F | 57°F | 35% | 17% | 15 h 20 min |
| July 6 | 85°F | 57°F | 34% | 17% | 15 h 20 min |
| July 7 | 85°F | 57°F | 34% | 16% | 15 h 20 min |
| July 8 | 85°F | 58°F | 34% | 16% | 15 h 20 min |
| July 9 | 86°F | 58°F | 33% | 16% | 15 h 20 min |
| July 10 | 86°F | 58°F | 33% | 16% | 15 h 20 min |
| July 11 | 86°F | 58°F | 33% | 16% | 15 h 20 min |
| July 12 | 86°F | 58°F | 33% | 16% | 15 h 20 min |
| July 13 | 86°F | 59°F | 32% | 16% | 15 h 10 min |
| July 14 | 87°F | 59°F | 32% | 15% | 15 h 10 min |
| July 15 | 87°F | 59°F | 32% | 15% | 15 h 10 min |
| July 16 | 87°F | 59°F | 32% | 15% | 15 h 10 min |
| July 17 | 87°F | 59°F | 32% | 15% | 15 h 10 min |
| July 18 | 87°F | 59°F | 31% | 15% | 15 h 10 min |
| July 19 | 87°F | 59°F | 31% | 15% | 15 h 10 min |
| July 20 | 88°F | 60°F | 31% | 15% | 15 h |
| July 21 | 88°F | 60°F | 31% | 15% | 15 h |
| July 22 | 88°F | 60°F | 31% | 15% | 15 h |
| July 23 | 88°F | 60°F | 31% | 15% | 15 h |
| July 24 | 88°F | 60°F | 31% | 15% | 15 h |
| July 25 | 88°F | 60°F | 30% | 15% | 14 h 50 min |
| July 26 | 88°F | 60°F | 30% | 15% | 14 h 50 min |
| July 27 | 88°F | 60°F | 30% | 15% | 14 h 50 min |
| July 28 | 88°F | 60°F | 30% | 15% | 14 h 50 min |
| July 29 | 88°F | 60°F | 30% | 15% | 14 h 50 min |
| July 30 | 88°F | 60°F | 29% | 15% | 14 h 40 min |
| July 31 | 88°F | 60°F | 29% | 14% | 14 h 40 min |
- Normal high
- 86°FJuly average
- Normal low
- 59°FJuly average
- Precipitation
- 2.28 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 12
- Daylight
- 15 h 30 min to 14 h 40 minJuly 1 to July 31
- Days at 70°F or more
- 30
- Days at 80°F or more
- 25
- Sunshine
- 86%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00024090; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Rapid City in July?
On a given July day the chance of 0.01 inch or more is 32% on average, highest around July 1 (36%). In all, 2.28 in falls on 10 days of a normal July.
In a normal July in Rapid City, 12 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024090.
How humid and windy is Rapid City in July?
At 3 p.m. the normal temperature is 84°F with 36% relative humidity and a dew point of 54°F; at 6 a.m. it is 64°F with 73% humidity. The wind averages 8.9 mph, most often from the east in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 64°F | 55°F | 73% | 6.8 mph | 79% |
| 9 a.m. | 76°F | 56°F | 51% | 10.2 mph | 81% |
| noon | 82°F | 55°F | 39% | 11.1 mph | 79% |
| 3 p.m. | 84°F | 54°F | 36% | 11.2 mph | 80% |
| 6 p.m. | 80°F | 55°F | 42% | 10.2 mph | 80% |
| 9 p.m. | 69°F | 55°F | 61% | 7.6 mph | 84% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00024090. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for July in Rapid City?
The warmest July temperature on Rapid City's official record (since 1942) is 112°F, on July 25, 2026; the coldest is 39°F, on July 1, 1959. The wettest July brought 6.37 in (2019).
The July mean against the 1991-2020 normal of 72.4°F: 2021 75.9°F (+3.5), 2022 74.7°F (+2.3), 2023 70.5°F (−1.9), 2024 75.2°F (+2.8), 2025 73.5°F (+1.1), 2026 79.3°F (+6.9). 5 of 6 ran warmer than normal.
| July | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 75.9°F | +3.5°F | 2.49 in |
| 2022 | 74.7°F | +2.3°F | 4.03 in |
| 2023 | 70.5°F | −1.9°F | 1.47 in |
| 2024 | 75.2°F | +2.8°F | 0.93 in |
| 2025 | 73.5°F | +1.1°F | 4.11 in |
| 2026 | 79.3°F | +6.9°F | 1.36 in |
Source: records: ACIS, NWS threaded record RAPthr; recent months: ACIS, station USW00024090. Records and recent months use complete months only.
How does July in Rapid City compare across South Dakota?
Across the 100 places PlainClimate covers in South Dakota, July normal highs run from 79°F in Custer to 91°F in Interior; Rapid City's is 86°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.