About Romanshorn
Romanshorn is a Swiss municipality located in the canton of Thurgau (TG), at 47.565° latitude and 9.358° longitude. The municipality is part of the Lake Constance basin, mild and humid climate, frequent autumn fog. Also known as Romanshorn, Romanshorn benefits from precise weather monitoring with hourly and 15-day forecasts.
Climate of Romanshorn
The climate in Romanshorn is characteristic of the Lake Constance basin, mild and humid climate, frequent autumn fog. Temperatures, precipitation and wind conditions vary throughout the year with local features linked to altitude and surrounding terrain. Our data comes from official weather stations and real-time Netatmo sensors for Romanshorn and neighboring municipalities.
On this page you will find the detailed weather forecast for Romanshorn: current temperature, 48-hour hourly forecast, 15-day forecast, air quality, UV index, wind, precipitation and weather alerts. Updated hourly.
Climate of Romanshorn: 1991–2020 normals
In Romanshorn (430 m), the mean annual temperature is 10.0 °C. The warmest month is July (19.2 °C on average) and the coldest January (1.2 °C). About 998 mm of precipitation falls per year, peaking in August (117 mm) with a minimum in February (53 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 31.4 °C and the absolute minimum −8.0 °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 | 1.2 °C | 12.1 °C | −8.0 °C | 55 | 47 | 20 | 0 |
| Feb | 1.9 °C | 13.6 °C | −7.5 °C | 53 | 79 | 18 | 0 |
| Mar | 5.7 °C | 18.6 °C | −4.3 °C | 62 | 147 | 10 | 0 |
| Apr | 9.6 °C | 23.3 °C | −1.0 °C | 69 | 189 | 3 | 0 |
| May | 13.9 °C | 27.4 °C | 3.5 °C | 106 | 209 | 0 | 3 |
| Jun | 17.5 °C | 30.5 °C | 7.4 °C | 116 | 226 | 0 | 10 |
| Jul | 19.2 °C | 31.4 °C | 9.8 °C | 115 | 246 | 0 | 15 |
| Aug | 18.8 °C | 30.7 °C | 9.2 °C | 117 | 224 | 0 | 14 |
| Sep | 14.6 °C | 25.7 °C | 5.5 °C | 86 | 163 | 0 | 3 |
| Oct | 10.2 °C | 21.6 °C | 1.4 °C | 74 | 97 | 1 | 0 |
| Nov | 5.2 °C | 16.8 °C | −3.2 °C | 69 | 51 | 6 | 0 |
| Dec | 2.1 °C | 13.0 °C | −7.3 °C | 75 | 40 | 17 | 0 |
| Year | 10.0 °C | 31.4 °C | −8.0 °C | 998 | 1718 | 75 | 46 |
Source: MeteoSwiss open data (1991–2020 normals) — stations Güttingen (7 km, 440 m), St. Gallen (16 km, 776 m), Altenrhein (18 km, 398 m), adjusted to the elevation of Romanshorn (430 m) using a 0.55 °C/100 m lapse rate. Indicative, rounded values.
Nearby cities
Check the weather of cities near Romanshorn:
- Weather Uttwil
- Weather Dozwil
- Weather Salmsach
- Weather Hefenhofen
- Weather Egnach
- Weather Kesswil
- Weather Muolen
- Weather Amriswil
- Weather Sommeri
- Weather Güttingen
- Weather Häggenschwil
- Weather Arbon
→ Nearby cities · Canton Thurgau
Frequently asked questions about weather in Romanshorn
What is the weather in Romanshorn today?
At the top of the page you will find the current temperature, precipitation and wind in Romanshorn, updated in real time.
What is the 15-day forecast for Romanshorn?
The "15-day forecast" section shows min/max temperatures, precipitation and wind expected for the next 15 days in Romanshorn.
Will it rain tomorrow in Romanshorn?
Check the 48-hour hourly forecast to see exactly when precipitation is expected in Romanshorn.
What is the air quality in Romanshorn?
The air quality section displays the AQI index and PM2.5, PM10 and ozone concentrations measured near Romanshorn.
Are there weather alerts for Romanshorn?
Weather alerts (storms, high winds, extreme temperatures) are shown as a banner at the top of the page when active.
At what altitude is Romanshorn located?
Romanshorn sits at around 430 m above sea level in the canton of Thurgau. This elevation directly affects the temperatures, rain-snow line and snow cover shown in the forecasts.
What is the warmest month in Romanshorn?
The warmest month in Romanshorn is July, averaging 19.2 °C (1991–2020 normal). The coldest is January at 1.2 °C.
How much does it rain in Romanshorn per year?
Romanshorn receives about 998 mm of precipitation a year. The wettest month is August (117 mm), the driest February (53 mm).
When is the best time to visit Romanshorn?
For warmth and sunshine: July (19.2 °C on average, 246 h of sun). The coldest month is January (1.2 °C). Check the 15-day forecast above for your dates.