St. Helena, CA

Hourly

5 PM

91° RealFeel® 92° 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 0% Intermittent clouds

• RealFeel Shade™: 88°
• Heat Index: 89°
• Wind: WSW 9 mph
• Air Quality: Fair
• Max UV Index: 3.1 (Moderate)
• Wind Gusts: 15 mph
• Humidity: 28%
• Indoor Humidity: 28% (Ideal Humidity)
• Dew Point: 55° F
• AccuLumen Brightness Index™: 8 (Bright)
• Cloud Cover: 52%
• Visibility: 10 mi
• Cloud Ceiling: 20000 ft

6 PM

88° RealFeel® 88° 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 0% Sunny

• RealFeel Shade™: 85°
• Heat Index: 86°
• Wind: WSW 8 mph
• Air Quality: Fair
• Max UV Index: 2.1 (Low)
• Wind Gusts: 13 mph
• Humidity: 30%
• Indoor Humidity: 30% (Ideal Humidity)
• Dew Point: 53° F
• AccuLumen Brightness Index™: 9 (Very Bright)
• Cloud Cover: 6%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft

7 PM

84° RealFeel® 83° 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 0% Sunny

• RealFeel Shade™: 81°
• Heat Index: 83°
• Wind: WSW 7 mph
• Air Quality: Fair
• Max UV Index: 1.2 (Low)
• Wind Gusts: 10 mph
• Humidity: 35%
• Indoor Humidity: 35% (Ideal Humidity)
• Dew Point: 54° F
• AccuLumen Brightness Index™: 7 (Bright)
• Cloud Cover: 5%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft

8 PM

80° RealFeel® 78° Pleasant RealFeel Guide Pleasant 63° to 81° Most consider this temperature range ideal. LEARN MORE 0% Mostly sunny

• RealFeel Shade™: 78°
• Wind: WSW 7 mph
• Air Quality: Excellent
• Max UV Index: 0.3 (Low)
• Wind Gusts: 7 mph
• Humidity: 41%
• Indoor Humidity: 41% (Ideal Humidity)
• Dew Point: 54° F
• AccuLumen Brightness Index™: 2 (Dark)
• Cloud Cover: 10%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft

9 PM

75° RealFeel® 72° Pleasant RealFeel Guide Pleasant 63° to 81° Most consider this temperature range ideal. LEARN MORE 0% Mostly clear

• Wind: WSW 6 mph
• Air Quality: Excellent
• Wind Gusts: 6 mph
• Humidity: 50%
• Indoor Humidity: 50% (Ideal Humidity)
• Dew Point: 55° F
• AccuLumen Brightness Index™: 0 (Dark)
• Cloud Cover: 22%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft

10 PM

69° RealFeel® 66° Pleasant RealFeel Guide Pleasant 63° to 81° Most consider this temperature range ideal. LEARN MORE 0% Partly cloudy

• Wind: WSW 5 mph
• Air Quality: Excellent
• Wind Gusts: 6 mph
• Humidity: 62%
• Indoor Humidity: 62% (Ideal Humidity)
• Dew Point: 55° F
• AccuLumen Brightness Index™: 0 (Dark)
• Cloud Cover: 39%
• Visibility: 10 mi
• Cloud Ceiling: 30000 ft

11 PM

62° RealFeel® 62° Cool RealFeel Guide Cool 53° to 62° Light jacket or sweater may be appropriate. LEARN MORE 0% Intermittent clouds

• Wind: WSW 5 mph
• Air Quality: Excellent
• Wind Gusts: 5 mph
• Humidity: 77%
• Indoor Humidity: 63% (Ideal Humidity)
• Dew Point: 55° F
• AccuLumen Brightness Index™: 0 (Dark)
• Cloud Cover: 56%
• Visibility: 10 mi
• Cloud Ceiling: 14600 ft