Temperature layer
A continent-spanning temperature heatmap painted under your route, plus per-city values at the major stops along the way.
What you see
- Colored wash. Cool blues for sub-zero regions, gold around comfortable ranges (15–25 °C), red for the hottest. Smoothed bilinearly across the whole globe — zoom in and the gradient stays continuous.
- City temperatures. The 17 largest cities on the visible map get
a gold pill with the current value (e.g.
Reykjavík · 4.0°C). Useful for orienting yourself relative to the local climate. - Equator highlight. A faint gold line marks 0° latitude — the thermal equator usually sits a few degrees north of it depending on the season.
Where the data comes from
Open-Meteo's public global forecast grid, refreshed every 30 minutes. Each pixel is rendered server-side as a tiny RGBA PNG that the browser scales to the whole map; this keeps mobile bandwidth tiny while preserving smooth gradients.
How it interacts with your route
When the temperature layer is on:
- The route polyline is given a dark stroke so it stays readable on warm-color regions.
- Photo markers darken slightly so they don't visually fight the hottest reds.
- The daily-stats card on the trip's right column shows the per-day temperature at the day's midpoint position.
When it's useful
- Picking which day to walk a long stage on a multi-day trip.
- Noticing that the high mountain passage 200 km north is significantly colder than your starting point.
- Sharing context with friends following from another climate ("she's at -8 right now, that's why the photos look so frozen").
Toggling on
Live map → top-right weather toggle → Temperature. Mutually exclusive with Wind and Rain.
Related layers
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