Verdict: Fair month
Charleston Weather in July
July runs warm in Charleston, with daily highs around 31°C (88°F) and nights near 25°C (77°F). It's also the wet side of the calendar: rain falls on about 18 days, so build flexibility into plans. July is workable in Charleston if your dates are fixed — just plan around the conditions.
Average high
31°C / 88°F
Average low
25°C / 77°F
Rain days
~18
Precipitation
133 mm
What to pack for Charleston in July
- Light, breathable clothing — linen and technical fabrics earn their keep
- High-SPF sunscreen, sunglasses, and a refillable water bottle
- Rain gear is non-negotiable — expect rain on roughly 18 days
- Comfortable walking shoes — every guide on this site assumes you'll use them
July against the rest of the year
Warmest in Charleston: Jul (31°C / 88°F) · Coolest: Jan (15°C / 59°F) · Wettest: Aug (~20 rain days)
15°
7°
Jan
17°
9°
Feb
20°
12°
Mar
23°
15°
Apr
26°
19°
May
29°
23°
Jun
31°
25°
Jul
30°
24°
Aug
28°
21°
Sep
24°
17°
Oct
20°
12°
Nov
16°
8°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)