St. Helena, CA
Right Now
- Humidity: 100%
- Feels Like: 47°
- Heat Index: 48°
- Wind: 4 mph
- Wind Chill: 47°
- UV Index: 6 High
- Sunrise: 07:02:19 AM
- Sunset: 06:58:16 PM
- Dew Point: 48°
- Visibility: 9 mi
Today
Sun and clouds mixed. High 73F. Winds WSW at 10 to 15 mph.
Tonight
Some clouds. Low near 50F. Winds W at 5 to 10 mph.
Tomorrow
Sun and a few passing clouds. High around 80F. Winds NNW at 5 to 10 mph.
Next 12 Hours
Wind: W @ 4mph
Precip: 4% Chance
Humidity: 100%
Wind Chill: 48°
Heat Index: 49°
UV Index: 0 Low
Visibility: 3 mi
Wind: W @ 3mph
Precip: 4% Chance
Humidity: 100%
Wind Chill: 50°
Heat Index: 50°
UV Index: 0 Low
Visibility: 3 mi
Wind: W @ 3mph
Precip: 3% Chance
Humidity: 100%
Wind Chill: 52°
Heat Index: 52°
UV Index: 0 Low
Visibility: 5 mi
Wind: W @ 3mph
Precip: 3% Chance
Humidity: 92%
Wind Chill: 58°
Heat Index: 58°
UV Index: 1 Low
Visibility: 8 mi
Wind: W @ 5mph
Precip: 2% Chance
Humidity: 85%
Wind Chill: 62°
Heat Index: 62°
UV Index: 3 Moderate
Visibility: 10 mi
Wind: WSW @ 7mph
Precip: 2% Chance
Humidity: 77%
Wind Chill: 65°
Heat Index: 65°
UV Index: 4 Moderate
Visibility: 10 mi
Wind: WSW @ 8mph
Precip: 1% Chance
Humidity: 71%
Wind Chill: 67°
Heat Index: 67°
UV Index: 6 High
Visibility: 10 mi
Wind: WSW @ 9mph
Precip: 2% Chance
Humidity: 67%
Wind Chill: 70°
Heat Index: 70°
UV Index: 6 High
Visibility: 10 mi
Wind: SW @ 11mph
Precip: 2% Chance
Humidity: 66%
Wind Chill: 71°
Heat Index: 71°
UV Index: 6 High
Visibility: 10 mi
Wind: SW @ 11mph
Precip: 4% Chance
Humidity: 68%
Wind Chill: 71°
Heat Index: 71°
UV Index: 4 Moderate
Visibility: 10 mi
Wind: SW @ 11mph
Precip: 16% Chance
Humidity: 73%
Wind Chill: 70°
Heat Index: 70°
UV Index: 2 Low
Visibility: 10 mi
Wind: SW @ 10mph
Precip: 16% Chance
Humidity: 79%
Wind Chill: 67°
Heat Index: 68°
UV Index: 1 Low
Visibility: 10 mi
Napa will see warm temperatures this Sunday. It looks like it will be a comfortable 75 degrees. A 54-degree low is forecasted. The Napa area s…
This evening in Napa: Partly cloudy early with increasing clouds overnight. Low 52F. Winds WSW at 5 to 10 mph. Temperatures will be warm Sunda…
Today's temperature in Napa will be warm. It looks to reach a mild 77 degrees. We'll see a low temperature of 52 degrees today. The Napa area …
Tonight's weather conditions in Napa: Clear to partly cloudy. Low 52F. Winds WSW at 5 to 10 mph. Looking ahead, the Napa area can expect a ver…
Hot temperatures are predicted today. It looks to reach a balmy 84 degrees. Expect a drastic drop in temperatures though, with a low reaching …
Hurricane hunters' flight patterns shown by meteorologists on TV may look like random, odd shapes, but they serve specific purposes for each storm.
Napa's evening forecast: Partly cloudy skies. Low 53F. Winds light and variable. Friday, Napa folks should be prepared for high temperatures. …
Leaves can make the road slick, so it’s important to take it slow and leave plenty of space in between vehicles this fall.
Flooding not only causes significant damage to structures and puts people at risk for drowning, but it's also dangerous for your health. Find …
Hurricane season officially begins on June 1, but usually doesn't peak in the Atlantic until Mid-August to the end of September. This is when …
1 in 10 people has a weather phobia. Do you? Let's look over the most interesting weather phobias.
With rapid advances from research and increasing computing power, extreme event attribution has become a burgeoning new branch of climate science.
One earthquake by itself isn’t enough to create a new tectonic plate, even if it’s a really large earthquake.
Print Ads
