Colonno weather: 16-day forecast
Today in Colonno: cloudy, 23° by day and 18° at night, 3% chance of rain. Next 7 days: 1 day with rain likely; warmest on Wednesday at 23°. A normal September day here reaches 23°.
- Wed 30/0923° 18°3%
- Thu 01/1021° 18°25%
- Fri 02/1021° 17°24% · 1.1 mm
- Sat 03/1020° 17°1%
- Sun 04/1021° 16°12%
- Mon 05/1022° 15°16%
- Tue 06/1021° 16°18%
Water22.9 °CThu 22.8°Fri 22.8°
Modelled at 1 m depth, not measured · Eawag Alplakes · as of 2026-09-30 · One value for the whole lake: the model has no town-by-town detail here.
Days 8–16 (less certain)
- Wed 07/1023° 16°25%
- Thu 08/1019° 16°29% · 1.8 mm
- Fri 09/1017° 13°19% · 0.6 mm
- Sat 10/1019° 13°16%
- Sun 11/1021° 12°27%
- Mon 12/1019° 12°29%
- Tue 13/1019° 12°33%
- Wed 14/1017° 5°– · 8.7 mm
- Thu 15/100° 0°–
Forecast as of 2026-09-30 · Open-Meteo (CC BY 4.0)
Colonno climate by month
July is the warmest month in Colonno (around 28° by day); May has the most rain days (about 19).
| Month | Day | Night | Rain days (≥1 mm) | Rain |
|---|---|---|---|---|
| January | 9° | 3° | 8 | 60 mm |
| February | 11° | 4° | 8 | 77 mm |
| March | 14° | 5° | 11 | 112 mm |
| April | 17° | 8° | 13 | 138 mm |
| May | 20° | 12° | 19 | 186 mm |
| June | 26° | 17° | 16 | 188 mm |
| July | 28° | 20° | 16 | 180 mm |
| August | 27° | 20° | 14 | 226 mm |
| September | 23° | 17° | 15 | 167 mm |
| October | 19° | 13° | 13 | 199 mm |
| November | 13° | 7° | 12 | 143 mm |
| December | 10° | 4° | 7 | 82 mm |
Averages 2016–2025 from reanalysis data (Open-Meteo); a single year can differ a lot.
Averages 2016–2025, Open-Meteo archive (ERA5).