Charleston, SC
South Carolina · Records since 1937–2026
Records for August 11
🔥 Record High
August 11, 1968
+8° from 90° normal❄ Record Low
August 11, 1944
-16° from 74° normalAll-Time Records — Charleston
Top 10 Record Highs — August 11
| # | Temp | Date |
|---|---|---|
| 🏆 | 98°F | August 11, 1968 |
| 2 | 96°F | August 11, 2013 |
| 3 | 96°F | August 11, 2011 |
| 4 | 96°F | August 11, 2009 |
| 5 | 96°F | August 11, 1999 |
| 6 | 96°F | August 11, 1957 |
| 7 | 96°F | August 11, 1954 |
| 8 | 95°F | August 11, 2008 |
| 9 | 95°F | August 11, 1983 |
| 10 | 95°F | August 11, 1941 |
Top 5 Record Lows — August 11
| # | Temp | Date |
|---|---|---|
| 🥶 | 58°F | August 11, 1944 |
| 2 | 65°F | August 11, 2002 |
| 3 | 66°F | August 11, 1989 |
| 4 | 66°F | August 11, 1945 |
| 5 | 67°F | August 11, 1967 |
Heat Wave Summary — Charleston
threshold: 95°F (90th percentile of historical Jun–Aug highs)2026 Daily High Temperature vs Normal
Year to date131 of 221 days with data were above the 1991–2020 normal high for their date.
Days ≥ 90°F Per Year
1937–2026Average 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
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
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")
Month in Review — July 2026
Average temperature · July 2026
4th-warmest month on record
4th-warmest July of 90 on record
+2.6° vs. 82.6° average (1991–2020)Longest 90°F Streak in July
13 consecutive days with highs of at least 90°F (Jul 1–13, 2026, peaking at 100°F)
The longest July streak since 2025 (1 year). The July record is 31 days, set in 1993.
100°F Milestone
Charleston reached 100°F in 2026 — the first time it hit 100°F since 2019 (7 years).
Average July Temperature by Year
1937–2026 · 2026 highlighted
Warmest Julys on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 2016 | 86.2°F |
| 2 | 1986 | 86.1°F |
| 3 | 1993 | 85.5°F |
| 4 | 2026 | 85.3°F |
| 5 | 2024 | 84.4°F |
| 6 | 2025 | 84.4°F |
| 7 | 2023 | 84.3°F |
| 8 | 1992 | 83.9°F |
| 9 | 1998 | 83.8°F |
| 10 | 1977 | 83.7°F |
Warmest Months on Record (Any Month)
| # | Month | Avg Temp |
|---|---|---|
| 1 | July 2016 | 86.2°F |
| 2 | July 1986 | 86.1°F |
| 3 | July 1993 | 85.5°F |
| 4 | July 2026 | 85.3°F |
| 5 | July 2024 | 84.4°F |
| 6 | July 2025 | 84.4°F |
| 7 | July 2023 | 84.3°F |
| 8 | August 2023 | 83.9°F |
| 9 | July 1992 | 83.9°F |
| 10 | July 1998 | 83.8°F |
Nearby Stations — July 2026
How the same month ranked at the closest reporting stations
| Station | Avg Temp | July Rank |
|---|---|---|
| Charleston, SC | 85.3°F | 4th of 90 |
| Charleston Downtown, SC | 84.7°F | 6th of 133 |
| Savannah, GA | 85.7°F | 3rd of 153 |
| Myrtle Beach, SC | 82.7°F | 5th of 66 |
| Columbia, SC | 84.7°F | 8th of 140 |