Johnston, SC

Hourly

1 PM

90° RealFeel® 102° Very Hot RealFeel Guide Very Hot 101° to 107° Caution advised. Danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities. LEARN MORE 20% Mostly cloudy

• RealFeel Shade™: 93°
• Heat Index: 96°
• Wind: WSW 8 mph
• Air Quality: Fair
• Max UV Index: 8.8 (Very High)
• Wind Gusts: 15 mph
• Humidity: 55%
• Indoor Humidity: 55% (Extremely Humid)
• Dew Point: 72° F
• AccuLumen Brightness Index™: 5 (Medium)
• Cloud Cover: 76%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft

2 PM

91° RealFeel® 103° Very Hot RealFeel Guide Very Hot 101° to 107° Caution advised. Danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities. LEARN MORE 19% Mostly cloudy

• RealFeel Shade™: 95°
• Heat Index: 98°
• Wind: WSW 8 mph
• Air Quality: Fair
• Max UV Index: 8.1 (Very High)
• Wind Gusts: 15 mph
• Humidity: 53%
• Indoor Humidity: 53% (Extremely Humid)
• Dew Point: 72° F
• AccuLumen Brightness Index™: 5 (Medium)
• Cloud Cover: 76%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft

3 PM

92° RealFeel® 101° Very Hot RealFeel Guide Very Hot 101° to 107° Caution advised. Danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities. LEARN MORE 19% Mostly cloudy

• RealFeel Shade™: 95°
• Heat Index: 99°
• Wind: WSW 8 mph
• Air Quality: Fair
• Max UV Index: 5.7 (High)
• Wind Gusts: 15 mph
• Humidity: 50%
• Indoor Humidity: 50% (Very Humid)
• Dew Point: 71° F
• AccuLumen Brightness Index™: 5 (Medium)
• Cloud Cover: 76%
• Visibility: 10 mi
• Cloud Ceiling: 28000 ft

4 PM

93° RealFeel® 100° Hot RealFeel Guide Hot 90° to 100° Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities. LEARN MORE 24% Mostly cloudy

• RealFeel Shade™: 96°
• Heat Index: 100°
• Wind: WSW 8 mph
• Air Quality: Fair
• Max UV Index: 3.5 (Moderate)
• Wind Gusts: 15 mph
• Humidity: 48%
• Indoor Humidity: 48% (Very Humid)
• Dew Point: 71° F
• AccuLumen Brightness Index™: 5 (Medium)
• Cloud Cover: 76%
• Visibility: 10 mi
• Cloud Ceiling: 25900 ft

5 PM

91° RealFeel® 95° Hot RealFeel Guide Hot 90° to 100° Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities. LEARN MORE 51% Thunderstorms

• RealFeel Shade™: 95°
• Heat Index: 102°
• Wind: WSW 8 mph
• Air Quality: Fair
• Max UV Index: 1.0 (Low)
• Wind Gusts: 14 mph
• Humidity: 61%
• Indoor Humidity: 61% (Extremely Humid)
• Dew Point: 76° F
• AccuLumen Brightness Index™: 5 (Medium)
• Cloud Cover: 78%
• Rain: 0.15 in
• Visibility: 4 mi
• Cloud Ceiling: 2000 ft

6 PM

88° RealFeel® 93° Hot RealFeel Guide Hot 90° to 100° Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities. LEARN MORE 47% Mostly cloudy

• RealFeel Shade™: 91°
• Heat Index: 94°
• Wind: WSW 7 mph
• Air Quality: Fair
• Max UV Index: 1.1 (Low)
• Wind Gusts: 9 mph
• Humidity: 57%
• Indoor Humidity: 57% (Very Humid)
• Dew Point: 71° F
• AccuLumen Brightness Index™: 3 (Dull)
• Cloud Cover: 85%
• Visibility: 10 mi
• Cloud Ceiling: 22200 ft

7 PM

88° RealFeel® 93° Hot RealFeel Guide Hot 90° to 100° Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities. LEARN MORE 43% Cloudy

• RealFeel Shade™: 93°
• Heat Index: 94°
• Wind: W 6 mph
• Air Quality: Fair
• Max UV Index: 0.5 (Low)
• Wind Gusts: 7 mph
• Humidity: 59%
• Indoor Humidity: 59% (Extremely Humid)
• Dew Point: 72° F
• AccuLumen Brightness Index™: 1 (Dark)
• Cloud Cover: 90%
• Visibility: 10 mi
• Cloud Ceiling: 20500 ft

8 PM

86° RealFeel® 91° Hot RealFeel Guide Hot 90° to 100° Caution advised. Possible danger of dehydration, heat stroke, heat exhaustion and heat cramps if outside for extended periods, and especially while doing strenuous activities. LEARN MORE 47% Cloudy

• RealFeel Shade™: 91°
• Heat Index: 92°
• Wind: SW 6 mph
• Air Quality: Fair
• Max UV Index: 0.0 (Low)
• Wind Gusts: 6 mph
• Humidity: 62%
• Indoor Humidity: 62% (Extremely Humid)
• Dew Point: 72° F
• AccuLumen Brightness Index™: 0 (Dark)
• Cloud Cover: 95%
• Visibility: 10 mi
• Cloud Ceiling: 4000 ft

9 PM

83° RealFeel® 87° Very Warm RealFeel Guide Very Warm 82° to 89° Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine. LEARN MORE 51% Thunderstorms

• Heat Index: 90°
• Wind: SW 5 mph
• Air Quality: Fair
• Wind Gusts: 6 mph
• Humidity: 72%
• Indoor Humidity: 72% (Extremely Humid)
• Dew Point: 73° F
• AccuLumen Brightness Index™: 0 (Dark)
• Cloud Cover: 95%
• Rain: 0.05 in
• Visibility: 5 mi
• Cloud Ceiling: 4000 ft

10 PM

81° RealFeel® 87° Very Warm RealFeel Guide Very Warm 82° to 89° Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine. LEARN MORE 47% Cloudy

• Heat Index: 85°
• Wind: SSW 5 mph
• Air Quality: Fair
• Wind Gusts: 7 mph
• Humidity: 78%
• Indoor Humidity: 78% (Extremely Humid)
• Dew Point: 73° F
• AccuLumen Brightness Index™: 0 (Dark)
• Cloud Cover: 95%
• Visibility: 10 mi
• Cloud Ceiling: 18600 ft

11 PM

78° RealFeel® 84° Very Warm RealFeel Guide Very Warm 82° to 89° Older adults, infants, and those with sensitive medical conditions should minimize outdoor activity, especially in the sunshine. LEARN MORE 34% Cloudy

• Heat Index: 80°
• Wind: S 5 mph
• Air Quality: Fair
• Wind Gusts: 7 mph
• Humidity: 84%
• Indoor Humidity: 84% (Extremely Humid)
• Dew Point: 73° F
• AccuLumen Brightness Index™: 0 (Dark)
• Cloud Cover: 95%
• Visibility: 10 mi
• Cloud Ceiling: 18400 ft