Union City, California Weather
Union City, California — live current conditions, hourly and 7-day forecasts, NWS alerts, radar and satellite imagery, tide predictions, marine conditions and a solunar fishing forecast for Union City, Alameda County.
Tides, marine forecast and fishing conditions near Union City. Tide source:
Full aviation weather for Union City is published on the Hayward Executive Airport (KHWD) page, 12 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 Union City 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 Union City: Palo Alto Airport (KPAO) 17 km · Moffett Federal Airfield (KNUQ) 20 km · San Carlos Airport (KSQL) 22 km · Oakland San Francisco Bay Airport (KOAK) 22 km · San Francisco International Airport (KSFO) 31 km
Conditions reported at KHWD describe the airfield itself. Weather 12 km away can differ, particularly in terrain or near the coast. For conditions at Union City specifically, see the current conditions and forecast above.
About Union City, California
Union City rests against the foothills of the East Bay hills, a place where the land begins its gentle climb from the flat expanse of the bay lowlands. It lies 3.7 miles north-north-west of Fremont, CA (from Fremont, CA: bearing 333°T), and is situated 6.1 miles south-east of Hayward. The air here carries the faint scent of eucalyptus from the higher elevations, a dry, clean fragrance that mingles with the more urban aromas of asphalt and exhaust. Sunlight, especially in the late afternoon, casts long shadows that stretch across the grid of streets, revealing the subtle undulations of the terrain. You can see the distant shimmer of the bay on clearer days, a constant, quiet presence that shapes the very character of the place, drawing the eye westward. The history of Union City is one of transformation, from agricultural roots to a burgeoning industrial hub that served the needs of a growing region. Early settlers found fertile ground, and for decades, the land yielded crops that fed a hungry state. This agricultural past still whispers in the names of some streets and the occasional open space that resists the relentless march of development. Today, its economy is more diverse, with a strong presence in logistics and manufacturing, a testament to its strategic position near major transportation arteries. The legacy of its hardworking past is evident in the quiet determination of its residents, a people who have always understood the value of labor and the rewards of building something tangible.
Live animated radar for Union City 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 | Union City, Alameda County, California |
| Coordinates | 37.595833°N, 122.019167°W |
| Timezone | Pacific Time (America/Los_Angeles) |
| ZIP Code(s) | 94587, 94552 |
| Area Code | 510 |
| Page generated | September 2026 |
| Weather data | Open-Meteo (open-source), NOAA National Weather Service |
About This Union City, California Weather Page
This page provides live weather conditions and forecasts for Union City, 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 Union City includes coordinates 37.595833°N, 122.019167°W, situated in Alameda County. ZIP code 94587, 94552. 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.
