Charleston, SC
South Carolina · Records since 1937–2026
🌤️ 82°F
Feels like 90°
Currently in Charleston
As of 8:00 PM EDT
Records for July 28
🔥 Record High
101°F
July 28, 1949
+10° from 91° normal❄ Record Low
65°F
July 28, 1954
-9° from 74° normal
🌞 Normal high: 91°F 🌑 Normal low: 74°F 1991–2020 normals
All-Time Records — Charleston
105°F
Hottest Day Ever
Aug 1, 1999
6°F
Coldest Day Ever
Jan 21, 1985
11.50"
Wettest Day Ever
Oct 3, 2015
6.0"
Most Snow in One Day
Dec 23, 1989
Top 10 Record Highs — July 28
| # | Temp | Date |
|---|---|---|
| 🏆 | 101°F | July 28, 1949 |
| 2 | 99°F | July 28, 2025 |
| 3 | 99°F | July 28, 2005 |
| 4 | 98°F | July 28, 2016 |
| 5 | 97°F | July 28, 1999 |
| 6 | 97°F | July 28, 1993 |
| 7 | 97°F | July 28, 1968 |
| 8 | 96°F | July 28, 2020 |
| 9 | 96°F | July 28, 2014 |
| 10 | 96°F | July 28, 1987 |
Top 5 Record Lows — July 28
| # | Temp | Date |
|---|---|---|
| 🥶 | 65°F | July 28, 1954 |
| 2 | 66°F | July 28, 1962 |
| 3 | 68°F | July 28, 2019 |
| 4 | 68°F | July 28, 1977 |
| 5 | 68°F | July 28, 1947 |
Heat Wave Summary — Charleston
threshold: 95°F (90th percentile of historical Jun–Aug highs)4.2
Avg heat wave length
days (historical)
98°
Avg peak temp
during heat waves
59
Dangerous nights 2026
Overnights ≥ 70°F
5
Heat waves 2026
so far
2026 Daily High Temperature vs Normal
Year to date
Above normal
Below normal
125 of 207 days with data were above the 1991–2020 normal high for their date.
Days ≥ 90°F Per Year
1937–202648
2026 so far
58
Avg/year 1970–2025
74
Avg/year (last 10 complete)
98
Most in a year (2016)
Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Charleston
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Jul 7, 1986 – Jul 21, 1986 | 15 | 104°F (Jul 19) | 100°F | 78°F |
| 2 | Jul 3, 2016 – Jul 15, 2016 | 13 | 100°F (Jul 8) | 97°F | 77°F |
| 3 | Jun 13, 2015 – Jun 22, 2015 | 10 | 99°F (Jun 16) | 97°F | 77°F |
| 4 | Jul 4, 2026 – Jul 12, 2026 | 9 | 100°F (Jul 9) | 97°F | 76°F |
| 5 | Jul 26, 1999 – Aug 2, 1999 | 8 | 105°F (Aug 1) | 99°F | 77°F |
| 6 | May 24, 2019 – May 31, 2019 | 8 | 101°F (May 28) | 99°F | 74°F |
| 7 | Jun 21, 1950 – Jun 28, 1950 | 8 | 99°F (Jun 27) | 97°F | 75°F |
| 8 | Aug 12, 1995 – Aug 18, 1995 | 7 | 102°F (Aug 14) | 99°F | 76°F |
| 9 | Jun 24, 1952 – Jun 30, 1952 | 7 | 101°F (Jun 26) | 98°F | 75°F |
| 10 | Jul 29, 1942 – Aug 4, 1942 | 7 | 100°F (Jul 31) | 96°F | 76°F |
Heat Waves Per Year
Warm Summer Nights (Jun–Aug)
Nights where the overnight low exceeded the 1991–2020 normal low
39
2026 so far
above-normal nights
40.4
Avg / summer
1970–2020
79
Most in a summer
2016
Above-Normal Summer Nights Per Year
Average June–August Low by Decade
Overnight lows · complete decades only
Precipitation
Actual vs. 1991–2020 full-month and full-season normals
15.20"
2026 YTD
Normal: 28.13"
-12.93"
4.19"
July so far
July normal: 6.60"
-2.41"
6.08"
Summer so far
Summer normal: 19.78"
-13.70"
3
2026 heavy rain days
Days with ≥ 1.0"
Monthly Precipitation — Last 24 Months
Blue = actual · dashed line = monthly normal
Annual Precipitation Per Year (1970–2026)
Blue = above average · tan = below average · gold = 2026 (partial)
Heavy Rain Days Per Year (≥ 1.0")
Compare year-to-year changes in days with heavy rainfall (≥ 1.0")