Tropical nights: all cantons compared
Tropical nights 2025: the lowest value is in the canton of Geneva (0 nights per year), the highest in the canton of Vaud (8.3 nights per year). The full ranking of the 22 cantons with measurements:
Tap a canton.
Nights per year in which the temperature stays at 20 °C or more, mean of the canton’s weather stations below 800 m. Lower means cooler nights. (Source: MeteoSwiss)
| # | Canton | Value | Year |
|---|---|---|---|
| 1 | Geneva | 0 nights per year | 2025 |
| 2 | Solothurn | 0 nights per year | 2025 |
| 3 | Zug | 0 nights per year | 2025 |
| 4 | Glarus | 0 nights per year | 2025 |
| 5 | Obwalden | 0 nights per year | 2025 |
| 6 | Uri | 0 nights per year | 2025 |
| 7 | Lucerne | 0 nights per year | 2025 |
| 8 | Bern | 0 nights per year | 2025 |
| 9 | Aargau | 0.3 nights per year | 2025 |
| 10 | Thurgau | 0.5 nights per year | 2025 |
| 11 | Grisons | 0.5 nights per year | 2025 |
| 12 | Fribourg | 0.5 nights per year | 2025 |
| 13 | St. Gallen | 0.8 nights per year | 2025 |
| 14 | Jura | 1 nights per year | 2025 |
| 15 | Schaffhausen | 1 nights per year | 2025 |
| 16 | Zurich | 1.2 nights per year | 2025 |
| 17 | Schwyz | 4.7 nights per year | 2025 |
| 18 | Neuchâtel | 5.5 nights per year | 2025 |
| 19 | Basel-Landschaft | 5.5 nights per year | 2025 |
| 20 | Valais | 5.8 nights per year | 2025 |
| 21 | Ticino | 7.4 nights per year | 2025 |
| 22 | Vaud | 8.3 nights per year | 2025 |
🔍 Verify this figure
| Official source | MeteoSwiss |
| Dataset (archive) | data/climate/climate-days-cantons.json · manifest |
| SHA-256 checksum | 95b864d5ca0e0638813a7dfe… |
| Archive release (immutable) | SLI-2026-10-12.15 |
License: CC BY 4.0 (compilation); underlying figures remain subject to the source’s terms.
Frequently asked questions
Which canton has the lowest Tropical nights?
The canton of Geneva, at 0 nights per year.
Which canton has the highest Tropical nights?
The canton of Vaud, at 8.3 nights per year.