Lake Constance
Lake Constance is a Swiss lake (Thurgau, St. Gallen) at 395 m, covering 536 km² with a maximum depth of 251 m. Typical winds: Westwind, Föhn, Bise. Main shores and access points: Kreuzlingen, Romanshorn, Arbon, Rorschach, Steckborn, Ermatingen. The weather above is computed over the middle of the lake; the “Wind on the lake” section details hourly speed, gusts and direction — for sailing, windsurfing, paddling, fishing or swimming.
Climate of Lake Constance: 1991–2020 normals
In Lake Constance (395 m), the mean annual temperature is 10.2 °C. The warmest month is July (19.4 °C on average) and the coldest January (1.4 °C). About 973 mm of precipitation falls per year, peaking in June (113 mm) with a minimum in February (52 mm). The sun shines for about 1718 hours a year, mostly in July (246 h). On average there are 75 frost days and 8 hot days (≥ 30 °C) per year. The mean monthly maximum reaches 31.7 °C and the absolute minimum −7.8 °C.
Mean monthly precipitation (mm) — bar height relative to the wettest month.
| Month | Mean T | Abs. max | Abs. min | Precip. (mm) | Sunshine (h) | Frost days | Summer days |
|---|---|---|---|---|---|---|---|
| Jan | 1.4 °C | 12.2 °C | −7.8 °C | 54 | 47 | 20 | 0 |
| Feb | 2.0 °C | 13.7 °C | −7.3 °C | 52 | 79 | 18 | 0 |
| Mar | 5.9 °C | 18.8 °C | −4.1 °C | 61 | 147 | 10 | 0 |
| Apr | 9.8 °C | 23.6 °C | −0.8 °C | 67 | 189 | 3 | 0 |
| May | 14.1 °C | 27.6 °C | 3.6 °C | 103 | 209 | 0 | 3 |
| Jun | 17.7 °C | 30.8 °C | 7.5 °C | 113 | 226 | 0 | 10 |
| Jul | 19.4 °C | 31.7 °C | 10.0 °C | 112 | 246 | 0 | 15 |
| Aug | 19.0 °C | 30.9 °C | 9.3 °C | 113 | 224 | 0 | 14 |
| Sep | 14.7 °C | 25.9 °C | 5.6 °C | 83 | 163 | 0 | 3 |
| Oct | 10.4 °C | 21.7 °C | 1.6 °C | 72 | 97 | 1 | 0 |
| Nov | 5.4 °C | 16.9 °C | −3.0 °C | 68 | 51 | 6 | 0 |
| Dec | 2.2 °C | 13.1 °C | −7.1 °C | 74 | 40 | 17 | 0 |
| Year | 10.2 °C | 31.7 °C | −7.8 °C | 973 | 1718 | 75 | 46 |
Source: MeteoSwiss open data (1991–2020 normals) — stations Güttingen (8 km, 440 m), Altenrhein (21 km, 398 m), St. Gallen (22 km, 776 m), adjusted to the elevation of Lake Constance (395 m) using a 0.55 °C/100 m lapse rate. Indicative, rounded values.
Swiss lakes
- Weather Lake Pfäffikon (54 km · 537 m)
- Weather Lake Walen (57 km · 419 m)
- Weather Lake Greifen (61 km · 435 m)
- Weather Lake Zurich (66 km · 406 m)
- Weather Lake Klöntal (72 km · 848 m)
- Weather Lake Ägeri (80 km · 724 m)
Nearby municipalities
- Weather Uttwil (5 km)
- Weather Kesswil (6 km)
- Weather Romanshorn (6 km)
- Weather Dozwil (7 km)
- Weather Güttingen (7 km)
- Weather Hefenhofen (8 km)
- Weather Salmsach (9 km)
- Weather Sommeri (9 km)
Frequently asked questions about the weather: Lake Constance
What is the wind like on Lake Constance today?
The “Wind on the lake” section shows hourly average wind speed, gusts and direction for the next 24 hours, computed over the lake (395 m).
Can you swim in Lake Constance?
In summer (June to September) lowland lakes usually reach 18–24 °C at the surface; there are many public beaches and lidos. Check the air temperature, sunshine and UV index above to pick your slot.
What are the typical winds on Lake Constance?
Characteristic winds: Westwind, Föhn, Bise. Storm warnings on Swiss lakes are signalled by flashing lights (40 flashes/min = caution, 90 = storm).
What is the warmest month in Lake Constance?
The warmest month in Lake Constance is July, averaging 19.4 °C (1991–2020 normal). The coldest is January at 1.4 °C.
How much does it rain in Lake Constance per year?
Lake Constance receives about 973 mm of precipitation a year. The wettest month is June (113 mm), the driest February (52 mm).
When is the best time to visit Lake Constance?
For warmth and sunshine: July (19.4 °C on average, 246 h of sun). The coldest month is January (1.4 °C). Check the 15-day forecast above for your dates.