St. Helena, California Weather
St. Helena, California — live current conditions, hourly and 7-day forecasts, NWS alerts, radar and satellite imagery, tide predictions, marine conditions and a solunar fishing forecast, soil and crop conditions for St. Helena, Napa County.
Tides, marine forecast and fishing conditions near St. Helena. Tide source:
Full aviation weather for St. Helena is published on the Charles M. Schulz Sonoma County Airport (KSTS) page, 30 km away. It carries the current METAR decoded into plain language — surface wind, visibility, cloud layers and ceiling, temperature and dewpoint, and altimeter setting — alongside the raw observation as transmitted. 6 airfields within reach of St. Helena have their own pages, listed below.
The Terminal Aerodrome Forecast (TAF) is shown across its full validity period, with each change group broken out so you can see when conditions are expected to shift. Flight category is derived automatically — VFR, MVFR, IFR or LIFR — from reported ceiling and visibility, with runway details and field elevation alongside. Observations update roughly hourly and forecasts several times a day.
Other airports near St. Helena: Napa County Airport (KAPC) 36 km · Healdsburg Municipal Airport (KHES) 41 km · Marin County Airport - Gnoss Field (KDVO) 41 km · Nut Tree Airport (KVCB) 46 km · Yolo County Davis Woodland Winters Airport (KDWA) 54 km
Conditions reported at KSTS describe the airfield itself. Weather 30 km away can differ, particularly in terrain or near the coast. For conditions at St. Helena specifically, see the current conditions and forecast above.
Soil conditions, frost risk and crop weather for St. Helena.
About St. Helena, California
St. Helena unfolds with a quiet grace in the heart of Napa Valley, a landscape sculpted by time and the persistent sun. It lies 13.9 miles east-north-east of Santa Rosa, CA (from Santa Rosa, CA: bearing 71°T), and is situated 7.8 miles south-east of Calistoga. Rolling hills, cloaked in the muted greens of vineyards, embrace the town, their slopes catching the golden light of afternoon. The air, carrying the faint, sweet perfume of ripening grapes and damp earth, hums with the gentle activity of a place that knows its own pace. Streets lined with historic buildings, their facades weathered to a soft patina, speak of a past that is not forgotten but rather woven into the present, creating a character that is both enduring and welcoming. This Californian gem, St. Helena, thrives on the bounty of its fertile soil, its economy intrinsically linked to the world-renowned wines produced in the surrounding valley. The legacy of agriculture is palpable, a deep-rooted tradition that has shaped its identity and drawn visitors from across the globe, eager to sample its celebrated vintages. Beyond the vineyards, the town retains echoes of its early days, when it served as a vital stop along the stagecoach routes, a place of respite and commerce. Today, its charm lies in this harmonious blend of agricultural heritage and a sophisticated, yet unpretentious, way of life, where the rhythm of the seasons dictates the pulse of daily existence.
Live animated radar for St. Helena and surroundings — RainViewer.
NOAA GOES-16 GEOCOLOR — live animated loop updated every 10 minutes. Shows cloud cover, storm systems and weather patterns across the continental US.
Source: NOAA/NESDIS GOES-East · Public domain · Auto-updates on page reload
| Location | St. Helena, Napa County, California |
| Coordinates | 38.505187°N, 122.470258°W |
| Timezone | Pacific Time (America/Los_Angeles) |
| ZIP Code(s) | 94574 |
| Area Code | 510 |
| Page generated | September 2026 |
| Weather data | Open-Meteo (open-source), NOAA National Weather Service |
About This St. Helena, California Weather Page
This page provides live weather conditions and forecasts for St. Helena, California, including current conditions, a 24-hour hourly forecast, 7-day outlook, NWS extended text forecast, precipitation radar and NOAA GOES-16 satellite imagery. Aviation weather — live METAR observations and TAF forecasts — is published separately on the pages for the nearest reporting airports, linked from the aviation section above. Additional sections may include tide predictions, wave height, wave direction and sea-surface temperature, a barometric pressure trend, and a solunar-based fishing forecast with a fishing-conditions rating for coastal localities, and soil temperature, crop weather and live USGS river gauge data for agricultural areas near a monitored waterway. All data updates automatically on every page visit.
Location data for St. Helena includes coordinates 38.505187°N, 122.470258°W, situated in Napa County. ZIP code 94574. Telephone area code: 510. Timezone: Pacific Time (America/Los_Angeles).
Weather data is sourced from the NOAA National Weather Service (NWS) and the open-source Open-Meteo API. River and stream data is sourced from the USGS National Water Information System. Tide predictions are sourced from NOAA CO-OPS; marine and solunar data are modeled from Open-Meteo and public sunrise/moon calculations and should be treated as a general guide alongside on-the-water conditions. Radar is provided by RainViewer. Satellite imagery is sourced from NOAA/NESDIS GOES-East and is public domain.
