Public-data analysis
Four event windows, four different planning risks
Evidence checkedAug 6, 2026
K-Spot Now requested seven-day same-period 2025 observations from the KMA ASOS daily API for four reviewed 2026 event contexts. The values below are preserved as planning references. They show which failure mode deserves a backup; they do not predict the weather for the 2026 visit.
| Event context and reference window | Observed temperature | Rain / humidity | Decision the sample changes |
|---|---|---|---|
| Seoul outdoor stop — Aug 6–12, 2025 | 27.1°C average; 23.9–30.7°C average daily minimum/maximum | 31.8 mm total; 74.8% average humidity | Protect queue and walking time from heat; do not treat an indoor venue as proof that the approach and wait are comfortable. |
| Gwangalli waterfront show — Aug 6–12, 2025 | 25.8°C average; 23.5–29.4°C average daily minimum/maximum | 132.2 mm total; 83.4% average humidity | Keep a same-district indoor wait and recheck the organizer because rain and coastal exposure can threaten the viewing plan. |
| Andong festival window — Sep 24–30, 2025 | 20.9°C average; 17.4–25.5°C average daily minimum/maximum | 30.5 mm total; 84.1% average humidity | Carry a layer for the day-to-night range and verify which outdoor venue is used before assigning one forecast point. |
| Jinju riverside window — Oct 3–9, 2025 | 19.8°C average; 17.6–22.8°C average daily minimum/maximum | 106.2 mm total; 91.9% average humidity | Build a shorter riverside loop and a dry exit; the walking surface and return route matter as much as the lantern program. |
Busan and Jinju had wet reference windows, but the dates and places differ. The valid conclusion is to design a rain failure plan, not to predict that the 2026 event will be wet.
A Seoul museum visit, palace queue, and garden route share a station record but not the same exposure. Event format must sit beside the weather number.
Andong and Jinju span multiple outdoor areas. A single city forecast is a planning layer, while the organizer's venue map controls the actual route.
MethodThe stored dataset records station 108 for Seoul, 159 for Busan, 136 for Andong, and 192 for Jinju. Averages and totals are published exactly as returned by the reviewed import, without filling missing days or extrapolating to 2026.
LimitDifferent date windows cannot be ranked as a climate study, and one previous-year week cannot predict an event day. Use current KMA forecasts and organizer notices before travel.
Read the sample as a failure-mode test
The purpose of a historical observation is not to tell a traveler what the sky will do. It tests whether the itinerary survives a plausible combination of heat, rain, humidity, and exposure. The Gwangalli sample makes an indoor waiting option valuable; the Jinju sample makes a shorter walking loop and dry return more important; the Andong temperature range makes a day-to-night layer rational.
Because the four samples use different event windows, comparing their rainfall as a league table would be misleading. Each row belongs only to the event decision beside it. Current forecasts replace the historical reference as the date approaches, while the organizer remains the authority for cancellation, delay, and entry.
Match the weather point to the exposed part of the visit
A hotel forecast is not automatically the right forecast. For Gwangalli, the exposed decision happens at the beach and during the wait for a fixed-time show. For Jinju, it happens across a riverside walking route and bridge crossings. For Andong, several venues mean the traveler must first know which program and location they are attending.
Separate event duration from exposure duration. Add the walk from transit, admission queue, time needed to secure a viewing position, outdoor meal or merchandise queue, and the return to a station. A 12-minute show can create a two-hour weather commitment; a long indoor exhibition can still include a hot or wet approach.
| Event format | Weather variable to elevate | Useful backup |
|---|---|---|
| Waterfront drone show | Rain, wind, exposed wait, crowd return | Indoor meal or market in the same district |
| Riverside night festival | Rain surface, humidity, route length, last transport | Short loop with a defined dry exit |
| Multi-venue regional festival | Venue-specific timing and day/night range | One confirmed program instead of an all-day sweep |
| Palace or garden stop | Shade, standing time, heat, closure notice | Nearby indoor visit with checked opening day |
Use a 72-hour, 24-hour, departure sequence
Around 72 hours before the visit, choose the outdoor/indoor order and decide what would trigger a fallback. Around 24 hours before, move to the venue-level KMA forecast and record the issue time, event hours, temperature, precipitation, and relevant wind or alert signal. At departure, reopen both the forecast and the organizer notice rather than relying on a saved icon.
Change the plan when an official safety alert applies, the organizer cancels or modifies operation, or the full exposure exceeds the group's stated tolerance. Otherwise adjust arrival time, equipment, or route length. This sequence produces a decision that can be audited; generic seasonal language does not.
- 72 hours: define the exact weather condition that activates the indoor fallback.
- 24 hours: record the venue district, forecast issue time, event hours, and exposure duration.
- Departure: reopen KMA, safety alerts, and the organizer notice on the same device.
- After a change: shorten the route before adding another cross-city reservation.
Official sources used
These pages are the starting point for current rules. Open the relevant source again before payment, reservation, or departure.
- KMA ASOS Daily Weather APIOfficial dataset used for the four dated previous-year observation windows and station identifiers.
- KMA short-range forecastOfficial forecast that replaces the historical reference when the visit enters the short-range window.
- Safe Korea English alertsOfficial public-safety alerts checked separately from an organizer's cancellation decision.