Is it raining now in San Lorenzo?
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28 JulNo upcoming precipitation for the next hour.
Last update: 09:00, 28 Jul 2026
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Rain in San Lorenzo: What You Need to Know
San Lorenzo, California experiences atmospheric rivers November–March. The San Lorenzo rain radar delivers real-time NEXRAD data from KVTX (Los Angeles) / KMUX (Mt Umunhum/San Jose) / KBBX (Sacramento), updated every 4–6 minutes at up to 250-meter resolution. Storms in this part of California typically approach from west-southwest off Pacific, and RainViewer's hyperlocal radar shows their exact position and direction so you can act before conditions change.
A standard forecast covers the broader California region. RainViewer shows the actual cell over San Lorenzo right now — with direction arrows and a 2-hour nowcast so residents and visitors can make real decisions, not guesses.
Rain by Season in San Lorenzo
Peak rain season (November–March (atmospheric river season))
San Lorenzo's highest weather risk aligns with November–March (atmospheric river season). Atmospheric rivers november–march drives precipitation events in this region.
Transition months
Seasonal transitions bring variable conditions — a live radar is more reliable than a forecast during these less predictable windows.
Drier season (May–September)
Precipitation probability drops in San Lorenzo during May–September, allowing outdoor activities to proceed with lower weather risk.
Why You Need a Rain Radar in San Lorenzo
Commuters and Drivers in San Lorenzo
A radar check before leaving gives San Lorenzo drivers 20+ minutes to adjust timing or avoid flood-prone roads. Real-time NEXRAD is more actionable than a forecast probability for daily commute decisions in California.
Outdoor Planning in San Lorenzo
Residents and visitors planning outdoor activities in San Lorenzo benefit from knowing exactly when rain will arrive from west-southwest off Pacific. A live radar replaces forecast uncertainty with a real decision window.
RainViewer Radar Coverage in San Lorenzo
RainViewer aggregates radar data for the United States from the NEXRAD network operated by NOAA's National Weather Service — 160 WSR-88D stations covering the contiguous US, Alaska, Hawaii, and US territories. Data updates every 4–6 minutes as each station completes its scan cycle. RainViewer processes and displays NEXRAD data at up to 250-meter resolution. For San Lorenzo, California, the primary NEXRAD source is KVTX (Los Angeles) / KMUX (Mt Umunhum/San Jose) / KBBX (Sacramento).
San Lorenzo Rain Radar: Frequently Asked Questions
- Does San Lorenzo flood when it rains?
San Lorenzo can experience localized flooding during intense rain events, particularly in low-lying areas near drainage channels. Atmospheric rivers november–march means runoff can accumulate quickly in parts of California. A live radar provides advance warning before conditions develop.
- When is the rainy season in San Lorenzo?
San Lorenzo's primary rain season runs through November–March (atmospheric river season). The driest period is typically May–September.
- Is there a live rain radar for San Lorenzo?
Yes — RainViewer shows live NEXRAD data for San Lorenzo at up to 250-meter resolution, updated every 4–6 minutes from KVTX (Los Angeles) / KMUX (Mt Umunhum/San Jose) / KBBX (Sacramento). The hyperlocal radar includes current precipitation, storm direction, and a 2-hour nowcast.
- Can I set a rain alert for San Lorenzo?
RainViewer Essential sends a rain alert 10–15 minutes before precipitation reaches your saved location in San Lorenzo, California. Set an alert for your specific address — not just a general California area warning.
Track Rain in San Lorenzo in Real Time
Rain can arrive in San Lorenzo faster than a forecast update — a live radar gives you the window to act.
Forecasts cover California broadly. RainViewer shows the cell position over San Lorenzo right now.
Your weather app shows rain likely near San Lorenzo. RainViewer shows the cell position and minutes to arrival.
Track rain in San Lorenzo — free Upgrade to Essential for alerts, forecasts, and full radar history
2-hour forecast in 5-minute slices
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Rain alerts before arrival
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Direction arrows
storms approach San Lorenzo from west-southwest off Pacific
48 hours of radar history
review recent rain patterns in San Lorenzo
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