Alta Loma, California Weather
Alta Loma, 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 Alta Loma, San Bernardino County.
Tides, marine forecast and fishing conditions near Alta Loma. Tide source:
Full aviation weather for Alta Loma is published on the Ontario International Airport (KONT) page, 7 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 Alta Loma 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 Alta Loma: Upland-Cable Airport (KCCB) 8 km · Brackett Field (KPOC) 17 km · San Bernardino International Airport (KSBD) 33 km · Hesperia Airport (KL26) 38 km · Redlands Municipal Airport (KREI) 42 km
Conditions reported at KONT describe the airfield itself. Weather 7 km away can differ, particularly in terrain or near the coast. For conditions at Alta Loma specifically, see the current conditions and forecast above.
Soil conditions, frost risk and crop weather for Alta Loma.
About Alta Loma, California
Alta Loma unfolds across a broad alluvial fan, a gentle slope descending from the rugged San Gabriel Mountains that form a formidable, sun-bleached backdrop. It lies 1.1 miles north-north-west of Rancho Cucamonga, CA (from Rancho Cucamonga, CA: bearing 345°T), and is situated 9.6 miles west-north-west of Fontana. The landscape here is defined by wide, dusty streets and the subtle, almost imperceptible tilt of the land, a constant reminder of the powerful geological forces that shaped it. Scrub oak and chaparral cling to the higher elevations, their muted greens and browns a stark contrast to the more manicured, drought-tolerant flora that dots the residential neighborhoods below. In the late afternoon, the mountains often cast long, deep shadows, painting the western sky with hues of rose and lavender, a quiet spectacle that marks the close of another day. The air, particularly during the warmer months, carries a dry, clean scent, tinged with the faint perfume of desert wildflowers that bloom with surprising tenacity after a rare rain. Historically, Alta Loma was a nexus for citrus groves, the fertile soil and ample sunshine fostering a thriving agricultural industry that defined the region for decades. The legacy of those orchards can still be glimpsed in the occasional mature orange tree in a backyard or the remnants of irrigation channels. Today, while agriculture has largely given way to suburban development and the bustling commercial corridors that serve the Inland Empire, a sense of the land’s former bounty lingers. The local economy is now more diversified, encompassing retail, services, and a growing presence in logistics, with transportation routes radiating outward, connecting Alta Loma to the broader economic currents of Southern California. This transformation, from verdant groves to a more contemporary urban fabric, has occurred with a measured pace, allowing for a distinctive character to emerge, one that honors its agricultural roots while embracing its future.
Live animated radar for Alta Loma 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 | Alta Loma, San Bernardino County, California |
| Coordinates | 34.122232°N, 117.598109°W |
| Timezone | Pacific Time (America/Los_Angeles) |
| ZIP Code(s) | 91701 |
| Area Code | 818, 747 |
| Page generated | September 2026 |
| Weather data | Open-Meteo (open-source), NOAA National Weather Service |
About This Alta Loma, California Weather Page
This page provides live weather conditions and forecasts for Alta Loma, 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 Alta Loma includes coordinates 34.122232°N, 117.598109°W, situated in San Bernardino County. ZIP code 91701. Telephone area code: 818, 747. 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.
