Charleston weather in July: Charleston, South Carolina: normal highs, lows, rain and records for July
Charleston in July has a normal high of 91°F and a normal low of 74°F, a daily mean of 83°F, holding near 91°F all month. Measurable precipitation falls on 13 days in a normal July, 6.60 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 33°C and low of 23°C, 168 mm of precipitation in July.
- NOAA stationCharleston International Airport
- Station IDUSW00013880
- Location32.90°N 80.04°W
- Elevation40 ft (12 m)
- From the center6 miles
- Population157,665
- Jan 60° 39°
- Feb 64° 42°
- Mar 70° 47°
- Apr 77° 55°
- May 84° 63°
- Jun 89° 70°
- Jul 91° 74°
- Aug 90° 73°
- Sep 85° 68°
- Oct 78° 58°
- Nov 69° 47°
- Dec 63° 42°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Charleston in July?
The normal high is 91°F and the normal low 74°F, for a daily mean of 82.5°F. July is 3.1°F warmer than June and 1.1°F warmer than August. July is the warmest month of the year in Charleston and the 2nd wettest. From one year to the next July's mean temperature typically moves about 1.3°F either way (NOAA's standard deviation), so roughly two Julys in three average between 81°F and 84°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 44%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| July 1 | 91°F | 73°F | 42% | 29% |
| July 8 | 91°F | 73°F | 43% | 30% |
| July 15 | 92°F | 74°F | 43% | 30% |
| July 22 | 92°F | 74°F | 44% | 31% |
| July 31 | 91°F | 74°F | 44% | 31% |
Every day of July: normal high, low and chance of precipitation (warmest afternoon July 19, coldest night July 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| July 1 | 91°F | 73°F | 42% | 29% | 14 h 20 min |
| July 2 | 91°F | 73°F | 42% | 29% | 14 h 20 min |
| July 3 | 91°F | 73°F | 42% | 29% | 14 h 20 min |
| July 4 | 91°F | 73°F | 42% | 29% | 14 h 20 min |
| July 5 | 91°F | 73°F | 42% | 30% | 14 h 20 min |
| July 6 | 91°F | 73°F | 42% | 30% | 14 h 20 min |
| July 7 | 91°F | 73°F | 42% | 30% | 14 h 10 min |
| July 8 | 91°F | 73°F | 43% | 30% | 14 h 10 min |
| July 9 | 91°F | 74°F | 43% | 30% | 14 h 10 min |
| July 10 | 91°F | 74°F | 43% | 30% | 14 h 10 min |
| July 11 | 91°F | 74°F | 43% | 30% | 14 h 10 min |
| July 12 | 91°F | 74°F | 43% | 30% | 14 h 10 min |
| July 13 | 92°F | 74°F | 43% | 30% | 14 h 10 min |
| July 14 | 92°F | 74°F | 43% | 30% | 14 h 10 min |
| July 15 | 92°F | 74°F | 43% | 30% | 14 h 10 min |
| July 16 | 92°F | 74°F | 43% | 30% | 14 h 10 min |
| July 17 | 92°F | 74°F | 44% | 30% | 14 h 10 min |
| July 18 | 92°F | 74°F | 44% | 30% | 14 h |
| July 19 | 92°F | 74°F | 44% | 30% | 14 h |
| July 20 | 92°F | 74°F | 44% | 30% | 14 h |
| July 21 | 92°F | 74°F | 44% | 30% | 14 h |
| July 22 | 92°F | 74°F | 44% | 31% | 14 h |
| July 23 | 92°F | 74°F | 44% | 31% | 14 h |
| July 24 | 92°F | 74°F | 44% | 31% | 14 h |
| July 25 | 91°F | 74°F | 44% | 31% | 14 h |
| July 26 | 91°F | 74°F | 44% | 31% | 14 h |
| July 27 | 91°F | 74°F | 44% | 31% | 13 h 50 min |
| July 28 | 91°F | 74°F | 44% | 31% | 13 h 50 min |
| July 29 | 91°F | 74°F | 44% | 31% | 13 h 50 min |
| July 30 | 91°F | 74°F | 44% | 31% | 13 h 50 min |
| July 31 | 91°F | 74°F | 44% | 31% | 13 h 50 min |
- Normal high
- 91°FJuly average
- Normal low
- 74°FJuly average
- Precipitation
- 6.60 inmonth total
- Days with precipitation
- 130.01 inch or more
- Days at 90°F or more
- 21
- Daylight
- 14 h 20 min to 13 h 50 minJuly 1 to July 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 31
- Sunshine
- 84%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00013880; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Charleston in July?
On a given July day the chance of 0.01 inch or more is 43% on average, highest around July 31 (44%). In all, 6.60 in falls on 13 days of a normal July, 2 of them with an inch or more.
In a normal July in Charleston, 21 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00013880.
How humid and windy is Charleston in July?
At 3 p.m. the normal temperature is 88°F with 61% relative humidity and a dew point of 73°F; at 6 a.m. it is 75°F with 91% humidity. The wind averages 7.0 mph, most often from the south in the afternoon. A dew point of 65°F or more feels muggy to most people.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 75°F | 73°F | 91% | 4.6 mph | 46% |
| 9 a.m. | 82°F | 74°F | 75% | 7.3 mph | 48% |
| noon | 87°F | 73°F | 62% | 8.3 mph | 29% |
| 3 p.m. | 88°F | 73°F | 61% | 10.3 mph | 25% |
| 6 p.m. | 84°F | 73°F | 71% | 9.3 mph | – |
| 9 p.m. | 79°F | 74°F | 84% | 6.2 mph | 53% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00013880. 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 Charleston?
The warmest July temperature on Charleston's official record (since 1937) is 104°F, on July 20, 1986; the coldest is 58°F, on July 5, 1952. The wettest July brought 18.46 in (1964).
The July mean against the 1991-2020 normal of 82.5°F: 2021 80.7°F (−1.8), 2022 82.4°F (−0.1), 2023 84.3°F (+1.8), 2024 84.4°F (+1.9), 2025 84.4°F (+1.9), 2026 85.3°F (+2.8). 4 of 6 ran warmer than normal.
| July | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 80.7°F | −1.8°F | 7.85 in |
| 2022 | 82.4°F | −0.1°F | 9.47 in |
| 2023 | 84.3°F | +1.8°F | 11.21 in |
| 2024 | 84.4°F | +1.9°F | 8.08 in |
| 2025 | 84.4°F | +1.9°F | 6.66 in |
| 2026 | 85.3°F | +2.8°F | 4.83 in |
Source: records: ACIS, NWS threaded record CHSthr; recent months: ACIS, station USW00013880. Records and recent months use complete months only.
How does July in Charleston compare across South Carolina?
Across the 73 places PlainClimate covers in South Carolina, July normal highs run from 78°F in Caesars Head to 93°F in Aiken; Charleston's is 91°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.