Saint Helena, California 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Clear 94°F 34°C Heat Index: 91°F	Observed at: Saint Helena, CA	Elevation: 345 ft | 105 m
	Last Updated: July 29, 5:30 PM Timezone: GMT -5/-4
	Sky Conditions: Clear	Temperature: 94°F | 34°C
	Pressure: 29.54 in | 1000.2 mb	Dewpoint: 51°F | 11°C
	Humidity: 23%	Wind: W 7 mph | W 11 kph
	Feels Like: 91°F | 33°C	Visibility: 164.9 mi | 265.4 km
	Lat/Long: 38.5052 | -122.47	Sunrise: 6:09 AM   Sunset: 8:23 PM

7 Day Graphical Forecast

Valid: 5:32 PM 7/29/2026

Today Overcast 97 |59 °F 36 |15 °C 0% Chance Precipitation Thursday Foggy 101 |55 °F 39 |13 °C 0% Chance Precipitation Friday Foggy 102 |52 °F 39 |11 °C 0% Chance Precipitation Saturday Clear 105 |58 °F 41 |15 °C 0% Chance Precipitation Sunday Clear 105 |59 °F 41 |15 °C 0% Chance Precipitation Monday Clear 110 |60 °F 43 |16 °C 0% Chance Precipitation Tuesday Clear 108 |64 °F 42 |18 °C 0% Chance Precipitation

7 Hour Graphical Forecast

Valid: 5:32 PM 7/29/2026

5 PM Clear 95 °F 0% Chance Precipitation

6 PM Clear 94 °F 0% Chance Precipitation

7 PM Clear 92 °F 0% Chance Precipitation

8 PM Clear 82 °F 0% Chance Precipitation

9 PM Clear 73 °F 0% Chance Precipitation

10 PM Clear 68 °F 0% Chance Precipitation

11 PM Clear 64 °F 0% Chance Precipitation

7 Day Textual Forecast - with QPF, Max Wind, Humidity, Snowfall & UV Index

7 Day & Night Weather Forecast for Saint Helena, CA - (Fahrenheit & Celsius) Valid: 5:32 PM 7/29/2026 Today Overcast with a high near 97°F [36°C]. SSE wind to around 10 mph [16 kph], with gusts to near 12 mph [19 kph]. Dewpoint near 51°F [11°C] with humidity of 99%. Pressure around 29.54 in [1000.2 mb]. UV Index: 8.05. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Tonight Overcast with a low around 59°F [15°C]. SSE wind to around 10 mph [16 kph], with gusts to near 12 mph [19 kph]. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Thursday Foggy with a high near 101°F [39°C]. S wind to around 10 mph [17 kph], with gusts to near 14 mph [23 kph]. Dewpoint near 51°F [11°C] with humidity of 100%. Pressure around 29.54 in [1000.2 mb]. UV Index: 8.1. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Thursday Night Foggy with a low around 55°F [13°C]. S wind to around 10 mph [17 kph], with gusts to near 14 mph [23 kph]. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Friday Foggy with a high near 102°F [39°C]. SSW wind to around 11 mph [17 kph], with gusts to near 7 mph [12 kph]. Dewpoint near 51°F [11°C] with humidity of 100%. Pressure around 29.54 in [1000.2 mb]. UV Index: 8.1. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Friday Night Foggy with a low around 52°F [11°C]. SSW wind to around 11 mph [17 kph], with gusts to near 7 mph [12 kph]. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Saturday Clear with a high near 105°F [41°C]. SW wind to around 7 mph [11 kph], with gusts to near 7 mph [10 kph]. Dewpoint near 51°F [11°C] with humidity of 71%. Pressure around 29.54 in [1000.2 mb]. UV Index: 8.05. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Saturday Night Clear with a low around 58°F [15°C]. SW wind to around 7 mph [11 kph], with gusts to near 7 mph [10 kph]. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Sunday Clear with a high near 105°F [41°C]. SW wind to around 8 mph [13 kph], with gusts to near 7 mph [12 kph]. Dewpoint near 51°F [11°C] with humidity of 84%. Pressure around 29.54 in [1000.2 mb]. UV Index: 8.05. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Sunday Night Clear with a low around 59°F [15°C]. SW wind to around 8 mph [13 kph], with gusts to near 7 mph [12 kph]. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Monday Clear with a high near 110°F [43°C]. SSW wind to around 8 mph [13 kph], with gusts to near 7 mph [10 kph]. Dewpoint near 51°F [11°C] with humidity of 66%. Pressure around 29.54 in [1000.2 mb]. UV Index: 7.9. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Monday Night Clear with a low around 60°F [16°C]. SSW wind to around 8 mph [13 kph], with gusts to near 7 mph [10 kph]. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Tuesday Clear with a high near 108°F [42°C]. SW wind to around 9 mph [14 kph], with gusts to near 8 mph [13 kph]. Dewpoint near 51°F [11°C] with humidity of 47%. Pressure around 29.54 in [1000.2 mb]. UV Index: 7.9. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm]. Tuesday Night Clear with a low around 64°F [18°C]. SW wind to around 9 mph [14 kph], with gusts to near 8 mph [13 kph]. Chance of precipitation 0% with QPF of 0.00 in [0.0 mm].

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7 Day and Night - QPF Forecast for Saint Helena, CA

Today: 0.0 mm | 0.00 in

Tonight: 0.0 mm | 0.00 in

Thursday: 0.0 mm | 0.00 in

Thursday Night: 0.0 mm | 0.00 in

Friday: 0.0 mm | 0.00 in

Friday Night: 0.0 mm | 0.00 in

Saturday: 0.0 mm | 0.00 in

Saturday Night: 0.0 mm | 0.00 in

Sunday: 0.0 mm | 0.00 in

Sunday Night: 0.0 mm | 0.00 in

Monday: 0.0 mm | 0.00 in

Monday Night: 0.0 mm | 0.00 in

Tuesday: 0.0 mm | 0.00 in

Tuesday Night: 0.0 mm | 0.00 in

7 Day and Night - Maximum Wind Speed Forecast for Saint Helena, CA

Today: SSE @ 16 kph | 10 mph

Tonight: SSE @ 16 kph | 10 mph

Thursday: S @ 17 kph | 10 mph

Thursday Night: S @ 17 kph | 10 mph

Friday: SSW @ 17 kph | 11 mph

Friday Night: SSW @ 17 kph | 11 mph

Saturday: SW @ 11 kph | 7 mph

Saturday Night: SW @ 11 kph | 7 mph

Sunday: SW @ 13 kph | 8 mph

Sunday Night: SW @ 13 kph | 8 mph

Monday: SSW @ 13 kph | 8 mph

Monday Night: SSW @ 13 kph | 8 mph

Tuesday: SW @ 14 kph | 9 mph

Tuesday Night: SW @ 14 kph | 9 mph

7 Day and Night - Maximum Humidity Forecast for Saint Helena, CA

Today: 99 %

Tonight: 99 %

Thursday: 100 %

Thursday Night: 100 %

Friday: 100 %

Friday Night: 100 %

Saturday: 71 %

Saturday Night: 71 %

Sunday: 84 %

Sunday Night: 84 %

Monday: 66 %

Monday Night: 66 %

Tuesday: 47 %

Tuesday Night: 47 %

7 Day and Night - Snowfall Totals Forecast for Saint Helena, CA

Today: 0.0 cm | 0.00 in

Tonight: 0.0 cm | 0.00 in

Thursday: 0.0 cm | 0.00 in

Thursday Night: 0.0 cm | 0.00 in

Friday: 0.0 cm | 0.00 in

Friday Night: 0.0 cm | 0.00 in

Saturday: 0.0 cm | 0.00 in

Saturday Night: 0.0 cm | 0.00 in

Sunday: 0.0 cm | 0.00 in

Sunday Night: 0.0 cm | 0.00 in

Monday: 0.0 cm | 0.00 in

Monday Night: 0.0 cm | 0.00 in

Tuesday: 0.0 cm | 0.00 in

Tuesday Night: 0.0 cm | 0.00 in

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