Custer weather in July: Custer, South Dakota: normal highs, lows, rain and records for July
Custer in July has a normal high of 79°F and a normal low of 54°F, a daily mean of 67°F, rising from 77°F on the 1st to 79°F by the 31st. Measurable precipitation falls on 12 days in a normal July, 3.29 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 26°C and low of 12°C, 84 mm of precipitation in July.
- NOAA stationCuster County Airport
- Station IDUSW00094032
- Location43.73°N 103.61°W
- Elevation5,545 ft (1,690 m)
- Population1,829
- Jan 35° 15°
- Feb 35° 15°
- Mar 44° 22°
- Apr 50° 29°
- May 60° 38°
- Jun 71° 47°
- Jul 79° 54°
- Aug 78° 52°
- Sep 69° 43°
- Oct 54° 32°
- Nov 43° 22°
- Dec 35° 16°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Custer in July?
The normal high is 79°F and the normal low 54°F, for a daily mean of 66.5°F. July is 7.6°F warmer than June and 1.8°F warmer than August. July is the warmest month of the year in Custer and the wettest. Across the month the normal high rises 2°F, from 77°F on July 1 to 79°F on July 31. From one year to the next July's mean temperature typically moves about 2.6°F either way (NOAA's standard deviation), so roughly two Julys in three average between 64°F and 69°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 40%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| July 1 | 77°F | 51°F | 40% | 22% |
| July 8 | 79°F | 53°F | 38% | 21% |
| July 15 | 80°F | 54°F | 38% | 21% |
| July 22 | 80°F | 55°F | 39% | 21% |
| July 31 | 79°F | 54°F | 38% | 20% |
Every day of July: normal high, low and chance of precipitation (warmest afternoon July 18, coldest night July 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| July 1 | 77°F | 51°F | 40% | 22% | 15 h 20 min |
| July 2 | 77°F | 51°F | 39% | 22% | 15 h 20 min |
| July 3 | 78°F | 52°F | 39% | 22% | 15 h 20 min |
| July 4 | 78°F | 52°F | 39% | 22% | 15 h 20 min |
| July 5 | 78°F | 52°F | 39% | 22% | 15 h 20 min |
| July 6 | 78°F | 52°F | 39% | 21% | 15 h 20 min |
| July 7 | 79°F | 53°F | 39% | 21% | 15 h 20 min |
| July 8 | 79°F | 53°F | 38% | 21% | 15 h 20 min |
| July 9 | 79°F | 53°F | 38% | 21% | 15 h 20 min |
| July 10 | 79°F | 53°F | 38% | 21% | 15 h 20 min |
| July 11 | 79°F | 54°F | 38% | 21% | 15 h 10 min |
| July 12 | 79°F | 54°F | 38% | 21% | 15 h 10 min |
| July 13 | 80°F | 54°F | 38% | 21% | 15 h 10 min |
| July 14 | 80°F | 54°F | 38% | 21% | 15 h 10 min |
| July 15 | 80°F | 54°F | 38% | 21% | 15 h 10 min |
| July 16 | 80°F | 54°F | 38% | 21% | 15 h 10 min |
| July 17 | 80°F | 54°F | 39% | 21% | 15 h 10 min |
| July 18 | 80°F | 55°F | 39% | 21% | 15 h |
| July 19 | 80°F | 55°F | 39% | 21% | 15 h |
| July 20 | 80°F | 55°F | 39% | 21% | 15 h |
| July 21 | 80°F | 55°F | 39% | 21% | 15 h |
| July 22 | 80°F | 55°F | 39% | 21% | 15 h |
| July 23 | 80°F | 55°F | 39% | 21% | 15 h |
| July 24 | 80°F | 55°F | 39% | 21% | 14 h 50 min |
| July 25 | 80°F | 55°F | 39% | 21% | 14 h 50 min |
| July 26 | 80°F | 55°F | 39% | 21% | 14 h 50 min |
| July 27 | 80°F | 55°F | 39% | 21% | 14 h 50 min |
| July 28 | 80°F | 55°F | 39% | 21% | 14 h 50 min |
| July 29 | 80°F | 55°F | 39% | 20% | 14 h 40 min |
| July 30 | 80°F | 55°F | 39% | 20% | 14 h 40 min |
| July 31 | 79°F | 54°F | 38% | 20% | 14 h 40 min |
- Normal high
- 79°FJuly average
- Normal low
- 54°FJuly average
- Precipitation
- 3.29 inmonth total
- Days with precipitation
- 120.01 inch or more
- Days at 90°F or more
- 3
- Daylight
- 15 h 20 min to 14 h 40 minJuly 1 to July 31
- Days at 70°F or more
- 28
- Days at 80°F or more
- 18
- Sunshine
- 86%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094032; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Custer in July?
On a given July day the chance of 0.01 inch or more is 39% on average, highest around July 1 (40%). In all, 3.29 in falls on 12 days of a normal July, 1 of them with an inch or more.
In a normal July in Custer, 3 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094032.
How humid and windy is Custer in July?
At 3 p.m. the normal temperature is 75°F with 39% relative humidity and a dew point of 48°F; at 6 a.m. it is 59°F with 70% humidity. The wind averages 5.8 mph, most often from the east-southeast in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 59°F | 49°F | 70% | 3.7 mph | – |
| 9 a.m. | 71°F | 49°F | 46% | 6.6 mph | – |
| noon | 75°F | 49°F | 39% | 8.2 mph | – |
| 3 p.m. | 75°F | 48°F | 39% | 8.7 mph | – |
| 6 p.m. | 71°F | 50°F | 46% | 7.3 mph | – |
| 9 p.m. | 62°F | 50°F | 63% | 4.3 mph | – |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00094032. 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 Custer?
The warmest July temperature on this station's record (since 1999) is 99°F, on July 30, 2006; the coldest is 37°F, on July 30, 2009. The wettest July brought 6.24 in (2017).
The July mean against the 1991-2020 normal of 66.5°F: 2021 69.4°F (+2.9), 2022 68.5°F (+2.0), 2023 64.8°F (−1.7), 2024 67.5°F (+1.0), 2025 65.7°F (−0.8), 2026 70.7°F (+4.2). 4 of 6 ran warmer than normal.
| July | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 69.4°F | +2.9°F | 1.78 in |
| 2022 | 68.5°F | +2.0°F | 2.88 in |
| 2023 | 64.8°F | −1.7°F | 2.10 in |
| 2024 | 67.5°F | +1.0°F | 0.90 in |
| 2025 | 65.7°F | −0.8°F | 2.93 in |
| 2026 | 70.7°F | +4.2°F | 4.23 in |
Source: records: ACIS, station USW00094032; recent months: ACIS, station USW00094032. Records and recent months use complete months only.
How does July in Custer 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; Custer's is 79°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.