Is it raining now in Delavan?
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25 JulNo upcoming precipitation for the next hour.
Last update: 21:00, 25 Jul 2026
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Rain in Delavan: What You Need to Know
Delavan, Wisconsin experiences Great Lakes convection and spring flooding. The Delavan rain radar delivers real-time NEXRAD data from KMKX (Sullivan), updated every 4–6 minutes at up to 250-meter resolution. Storms in this part of Wisconsin typically approach from southwest, and RainViewer's hyperlocal radar shows their exact position and direction so you can act before conditions change.
A standard forecast covers the broader Wisconsin region. RainViewer shows the actual cell over Delavan right now — with direction arrows and a 2-hour nowcast so residents and visitors can make real decisions, not guesses.
Rain by Season in Delavan
Peak rain season (April–August (convective) and November–January (lake-effect))
Delavan's highest weather risk aligns with April–August (convective) and November–January (lake-effect). Great lakes convection and spring flooding 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 (January–February)
Precipitation probability drops in Delavan during January–February, allowing outdoor activities to proceed with lower weather risk.
Why You Need a Rain Radar in Delavan
Commuters and Drivers in Delavan
A radar check before leaving gives Delavan 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 Wisconsin.
Outdoor Planning in Delavan
Residents and visitors planning outdoor activities in Delavan benefit from knowing exactly when rain will arrive from southwest. A live radar replaces forecast uncertainty with a real decision window.
RainViewer Radar Coverage in Delavan
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 Delavan, Wisconsin, the primary NEXRAD source is KMKX (Sullivan).
Delavan Rain Radar: Frequently Asked Questions
- Does Delavan flood when it rains?
Delavan can experience localized flooding during intense rain events, particularly in low-lying areas near drainage channels. Great lakes convection and spring flooding means runoff can accumulate quickly in parts of Wisconsin. A live radar provides advance warning before conditions develop.
- When is the rainy season in Delavan?
Delavan's primary rain season runs through April–August (convective) and November–January (lake-effect). The driest period is typically January–February.
- Is there a live rain radar for Delavan?
Yes — RainViewer shows live NEXRAD data for Delavan at up to 250-meter resolution, updated every 4–6 minutes from KMKX (Sullivan). The hyperlocal radar includes current precipitation, storm direction, and a 2-hour nowcast.
- Can I set a rain alert for Delavan?
RainViewer Essential sends a rain alert 10–15 minutes before precipitation reaches your saved location in Delavan, Wisconsin. Set an alert for your specific address — not just a general Wisconsin area warning.
Track Rain in Delavan in Real Time
Rain can arrive in Delavan faster than a forecast update — a live radar gives you the window to act.
Forecasts cover Wisconsin broadly. RainViewer shows the cell position over Delavan right now.
Your weather app shows rain likely near Delavan. RainViewer shows the cell position and minutes to arrival.
Track rain in Delavan — 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 Delavan from southwest
48 hours of radar history
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