MeteoSwiss Weather

After setup

• Enable hourly forecastGives you: an hourly forecast on the weather entity (condition, temperature, precipitation and its probability, wind, gusts, direction, global radiation, zero-degree level), and the current condition follows the hourly symbol. Costs: about 0.3 MB per refresh at the default horizon. The data is refreshed whenever MeteoSwiss changed the coming hours, in practice about once an hour, whether or not a card is open. Not needed for: the daily forecast, the zero-degree level sensor and the "today" sensors.
• Forecast horizonCounted in full local calendar days. Default: the rest of today plus two full days (49–72 hours), read row by row and kept small on every refresh. Longer horizons and "Full run" (about 220 hours, 9 days) add a far tail beyond that: it is read row by row too, but refreshed at most every 6 hours rather than on every change, so it costs a little more without ever downloading a large part of the ~30 MB files.
• Include cloud cover layersGives you: cloud_coverage (the maximum of the high, mid and low layers) plus the three layers on every forecast hour. Costs: about 0.05 MB per refresh, three small per-point blocks. Off by default.
• Include temperature percentilesGives you: temperature_p10 and temperature_p90, the forecast's uncertainty band, on every forecast hour. Costs: about 0.5 MB per refresh, the most expensive extra (two files read row by row). Off by default.
• Enable pollen monitoringGives you: one sensor per pollen type the station measures, in grains/m³. Grass and birch are enabled, the others stay disabled until you enable them in the entity settings. Costs: one small file per hour.
• Pollen stationThe three nearest stations to your forecast point are shown; the nearest is pre-selected.