Johnston, South Carolina Climate
United States
Pop. 2,348 Elev. 202 m / 663 ft
TZ: America/New_York (UTC-4) ·
Johnston sees warm summers peaking at 93°F (34°C) in July, and cold winters that bottom out around 31°F (-1°C) in January. Humidity pushes the summer feels-like temperature to around 114°F (46°C). Precipitation occurs on roughly 65 days per year (41.2 in / 1046 mm total), with snow on 1 days and 4 in (106 mm) of annual accumulation. The city averages 159 sunny days per year and around 42 thunderstorm days. Nearby lake water reaches 84°F (29°C) in summer.
| Temperature | 93°F (34°C) high | 31°F (0°C) low |
| Feels like | 114°F (46°C) high | 28°F (-2°C) low |
| Rain | 65 days | 41.2 in (1046 mm) /yr |
| Snow | 1 days | 4.2 in (106 mm) /yr |
| Sky | 159 sunny | 42 stormy |
| Wind | 2.8 mph (1.2 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Feb, Mar, Apr, Sep, Oct, Nov
Sky & Air by Month
Cloud cover (%)
39
Jan 46
Feb 42
Mar 55
Apr 69
May 56
Jun 59
Jul 68
Aug 42
Sep 47
Oct 29
Nov 49
Dec Humidity (%)
58
Jan 64
Feb 46
Mar 56
Apr 66
May 67
Jun 68
Jul 78
Aug 66
Sep 66
Oct 53
Nov 64
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 33 mi Augusta Regional At Bush Field (AGS)
Ski resort 114 mi Sapphire Valley Ski Resort
National park 29 mi Redcliffe Plantation State Historic Site
Mountain peak
(5,072 ft) 117 mi Pilot Mountain
Hospital 8 mi Edgefield County Hospital
Hiking trail 20 mi Cathedral Aisle
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 52°F 11°C | 31°F 0°C | 1.5 in 39 mm | 4.2 in106 mm | 16 |
| February | 64°F 18°C | 43°F 6°C | 1.9 in 49 mm | — | 14 |
| March | 73°F 23°C | 48°F 9°C | 3.1 in 78 mm | — | 18 |
| April | 80°F 27°C | 59°F 15°C | 2.2 in 56 mm | — | 11 |
| May | 82°F 28°C | 64°F 18°C | 7.6 in 192 mm | — | 6 |
| June | 90°F 32°C | 72°F 22°C | 3.4 in 85 mm | — | 11 |
| July | 93°F 34°C | 76°F 24°C | 4.6 in 117 mm | — | 11 |
| August | 84°F 29°C | 71°F 22°C | 10.1 in 256 mm | — | 6 |
| September | 85°F 29°C | 65°F 18°C | 0.7 in 18 mm | — | 17 |
| October | 73°F 23°C | 55°F 13°C | 2.7 in 69 mm | — | 14 |
| November | 71°F 22°C | 46°F 8°C | 0.3 in 8 mm | — | 21 |
| December | 58°F 15°C | 40°F 4°C | 3.0 in 77 mm | — | 14 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 16 | 0 |
| February | 14 | 1 |
| March | 18 | 3 |
| April | 11 | 2 |
| May | 6 | 7 |
| June | 11 | 2 |
| July | 11 | 9 |
| August | 6 | 14 |
| September | 17 | 0 |
| October | 14 | 2 |
| November | 21 | 0 |
| December | 14 | 2 |
Water Temperatures Data
↑ See chart| Month | Lake Avg High |
|---|---|
| January | 45°F 7°C |
| February | 45°F 7°C |
| March | 50°F 10°C |
| April | 64°F 18°C |
| May | 72°F 22°C |
| June | 80°F 27°C |
| July | 84°F 29°C |
| August | 80°F 27°C |
| September | 74°F 24°C |
| October | 65°F 18°C |
| November | 55°F 13°C |
| December | 49°F 9°C |