San Ramon, CA Live Doppler Radar

Live radar for San Ramon, Contra Costa County: every NWS radar combined, rain, snow and ice colors, flash-flood risk, storm tracks and official warnings.

Open live radar for San RamonWhat TALON shows

What weather hits San Ramon?

Since 1996, the National Weather Service has logged river or areal flooding on 40 days in the East Bay Interior Valleys forecast zone and Contra Costa County — the most common reported hazard around San Ramon, mostly in January and February. Next come excessive heat (19 days) and high winds (11 days).

HazardDays reportedMost recentWorst on record
Flooding40Jan 2026Jan 1, 2006 · $22 million damage
Excessive heat19Mar 2026Jun 27, 2009 · 1 death
High winds11Jan 2019Jan 7, 2017 · 1 death
Debris flows11Feb 2019Apr 6, 2006 · $11 million damage
Wildfires8May 2022Aug 7, 2019 · $5,000 damage
Flash flooding7Feb 2000Feb 13, 2000 · $100,000 damage
Damaging thunderstorm winds2Apr 2024Apr 5, 2024 · $10 damage

Source: NOAA NCEI Storm Events Database, 1996–2026 (the latest year is partial). A "day" is a date with at least one report in the East Bay Interior Valleys forecast zone and Contra Costa County; damage is as reported, not adjusted for inflation.

Which radars cover San Ramon?

The closest NEXRAD Doppler radar is KMUX (San Francisco, CA), about 42 miles south. Radar beams climb as they travel, so the height of the lowest scan over town decides how low in a storm the radar can see.

RadarDistanceLowest beam over San RamonView
KMUX
San Francisco, CA		42 mi south2,800 ftExcellent — the lowest scan sees close to the ground
KDAX
Sacramento, CA		53 mi north-northeast3,800 ftGood — most storms and steady rain or snow show clearly
KBBX
Beale AFB, CA		121 mi north12,800 ftLimited — the beam overshoots the lowest part of storms

Beam height is the center of the 0.5° scan above the radar, with standard refraction. Mountains near a radar can block it further.

Tornado & hail history near San Ramon

Since 1950, NOAA has recorded 10 tornadoes within 25 miles of San Ramon, 1 of them EF2/F2 or stronger. Most came in January and April. The strongest was an F2 on January 11, 1951, which passed about 24 miles south-southwest of town. The most recent was an EF1 on January 23, 2010, which touched down about 14 miles northeast of town.

Hail: 1 report of 1-inch or larger hail within 25 miles since 1955; the largest was 1.00-inch hail on March 31, 2013.

Source: NOAA Storm Prediction Center — tornadoes 1950–2025, hail 1955–2025. Distances are to each tornado's track; ratings before February 2007 use the original Fujita scale.

On TALON you get San Ramon's live radar loop, rain/snow/ice colors, flash-flood risk, storm tracks with arrival times and NWS warnings free; close-up radar and rotation detection are part of TALON Pro.

San Ramon radar FAQ

Where is the nearest weather radar to San Ramon, CA?

KMUX (San Francisco, CA), about 42 miles south. KDAX (Sacramento, CA) is 53 miles away and also covers the area.

How often does San Ramon flood?

Since 1996 the National Weather Service has logged river or areal flooding on 40 days in the East Bay Interior Valleys forecast zone and Contra Costa County. TALON's free flash-flood risk layer shows, every 2 minutes, how close the rain that has fallen is to what it takes to flood — turn it on under Layers.

Is TALON's radar for San Ramon free?

Yes — the US radar loop, rain/snow/ice colors, flash-flood risk, storm tracks and NWS warnings are free in any browser. Close-up radar, rotation detection and longer forecasts are part of TALON Pro.

Should I rely on radar for my safety?

No app replaces official warnings. When the National Weather Service issues a warning for San Ramon, follow it right away — see watch vs. warning.

Radar for nearby towns

All California towns →