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Nan Rain Radar — Live Weather Map | RainViewer
Live rain radar for Nan, updated every 5 min. See mountain storms before they raise the Nan River downstream or trigger landslides on Highway 101. Free.
Rain in Nan: What You Need to Know
Rain in Nan follows the SW monsoon pattern that defines most of northern Thailand. Wet season runs June–September, when afternoon convective storms develop with little warning and can deliver intense rainfall in short bursts. The key risk is not just getting wet — it's the knock-on effects: Nan River flash flooding that affects Phitsanulok and Nakhon Sawan downstream, landslides on mountain roads, flash floods in the valley town. Local residents have learned to check real-time conditions before making decisions, because a regional forecast from the morning is useless when a cell is forming 20km away.
Nan is a province where trekkers in the northern mountains and agricultural workers in the Nan valley The difference between knowing rain is 15 minutes away versus learning about it when you're already in it is the difference between a managed disruption and a genuine problem.
RainViewer shows you exactly which part of Nan is in the rain right now — not a provincial average, but street-level precision updated every 5 minutes.
RainViewer Radar Coverage in Nan
RainViewer combines signals from radar stations across the region to give Nan a single, continuous map. From here, you can also track rain developing in Phrae, Phayao, Uttaradit — useful if you're driving Highway 101 between Phrae and Nan or trekking in the mountain districts.
Wet season (June–September)
Afternoon and evening storms drive the season. Peak intensity typically falls in August–September for most of Thailand, with the key variation being how terrain shapes local delivery. Cells can be intense and short-lived or slow-moving and sustained.
Transition months (May and October)
These are the months where forecast reliability drops most sharply. May often brings the first events of the season before residents have recalibrated from the dry months. October is when the monsoon exits — sometimes quickly, sometimes with a last burst of intense rain. Real-time radar is more useful than any extended outlook in these months.
Dry season (November–May)
Rainfall drops to minimal levels. When a stray shower does appear, it's visible on the radar well before it arrives.
Why You Need a Rain Radar in Nan
Planning time-sensitive outdoor activities
Whether you're working outdoors, travelling, or timing an event in Nan, knowing whether a cell will reach your location in the next 30–60 minutes is the single most useful piece of information you need.
Managing transport and logistics
The road network in Nan is affected by Nan River flash flooding that affects Phitsanulok and Nakhon Sawan downstream, landslides on mountain roads, flash floods in the valley town. Seeing the rain band's current position and direction on the map changes departure decisions.
Protecting agricultural operations
Farming communities in Nan time planting, spraying, and harvest operations around rain windows. A radar alert 20–30 minutes before a cell arrives gives just enough time to act.
Keeping track of weather near Nan River, Highway 101, Nan old town
Whether you're commuting through or visiting the area around Nan River, Highway 101, Nan old town, the live radar shows exactly which streets are in the rain and which are still dry — not a regional smear.
Planning activities that depend on weather windows
From outdoor markets to construction sites to school pickups, Nan residents use real-time radar to make the same decisions they'd make anywhere in Thailand: wait, move, or reroute.
Nan Rain Radar: Frequently Asked Questions
- How often does the RainViewer map update for Nan?
Every 5 minutes, drawing from Thai Meteorological Department radar networks. During active storm periods when conditions change fastest, you're seeing the map update as each radar sweep completes.
- Can I set rain alerts for Nan?
Yes. Set your home, work, or any location in Nan and receive a push notification when rain is approaching — with enough lead time to adjust your plans. You can also set a custom intensity threshold so light drizzle doesn't trigger an alert.
- Is RainViewer accurate for Nan?
RainViewer draws directly from the same radar networks used by the Thai Meteorological Department, preserving the original resolution rather than smoothing it into regional averages. For Nan, this means you can see which street is in the rain and which is still dry.
Track Rain in Nan in Real Time
See rain in Nan before it reaches your street
Whether you're managing logistics, timing an outdoor activity, or just deciding whether to leave now or in 20 minutes, RainViewer gives you the precision that generic weather apps don't. Street-level radar, 5-minute updates, and alerts that arrive while you can still act.
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