About Rapperswil-Jona
Rapperswil-Jona is a Swiss municipality located in the canton of St. Gallen (SG), at 47.250° latitude and 8.851° longitude. The municipality is part of the eastern Alps, alpine climate with snowy winters and cool summers. Also known as Rapperswil-Jona, Rapperswil-Jona benefits from precise weather monitoring with hourly and 15-day forecasts.
Climate of Rapperswil-Jona
The climate in Rapperswil-Jona is characteristic of the eastern Alps, alpine climate with snowy winters and cool summers. 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 Rapperswil-Jona and neighboring municipalities.
On this page you will find the detailed weather forecast for Rapperswil-Jona: current temperature, 48-hour hourly forecast, 15-day forecast, air quality, UV index, wind, precipitation and weather alerts. Updated hourly.
Climate of Rapperswil-Jona: 1991–2020 normals
In Rapperswil-Jona (459 m), the mean annual temperature is 10.2 °C. The warmest month is July (19.1 °C on average) and the coldest January (1.7 °C). About 1352 mm of precipitation falls per year, peaking in August (161 mm) with a minimum in February (78 mm). The sun shines for about 1705 hours a year, mostly in July (234 h). On average there are 68 frost days and 8 hot days (≥ 30 °C) per year. The mean monthly maximum reaches 31.1 °C and the absolute minimum −8.9 °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 | 1.7 °C | 12.7 °C | −8.9 °C | 81 | 56 | 19 | 0 |
| Feb | 2.1 °C | 13.8 °C | −8.3 °C | 78 | 87 | 16 | 0 |
| Mar | 5.7 °C | 18.3 °C | −4.9 °C | 96 | 144 | 8 | 0 |
| Apr | 9.6 °C | 22.7 °C | −0.9 °C | 93 | 183 | 2 | 0 |
| May | 13.8 °C | 26.9 °C | 3.7 °C | 141 | 198 | 0 | 3 |
| Jun | 17.3 °C | 30.0 °C | 7.4 °C | 150 | 216 | 0 | 11 |
| Jul | 19.1 °C | 31.1 °C | 10.0 °C | 155 | 234 | 0 | 15 |
| Aug | 18.9 °C | 30.3 °C | 9.4 °C | 161 | 218 | 0 | 13 |
| Sep | 14.8 °C | 25.8 °C | 5.7 °C | 112 | 161 | 0 | 3 |
| Oct | 10.8 °C | 22.5 °C | 1.6 °C | 94 | 107 | 1 | 0 |
| Nov | 5.8 °C | 18.1 °C | −3.4 °C | 89 | 57 | 6 | 0 |
| Dec | 2.6 °C | 13.7 °C | −7.4 °C | 102 | 44 | 16 | 0 |
| Year | 10.2 °C | 31.1 °C | −8.9 °C | 1352 | 1705 | 68 | 46 |
Source: MeteoSwiss open data (1991–2020 normals) — stations Wädenswil (13 km, 485 m), Einsiedeln (15 km, 911 m), Hörnli (15 km, 1133 m), adjusted to the elevation of Rapperswil-Jona (459 m) using a 0.55 °C/100 m lapse rate. Indicative, rounded values.
Nearby cities
Check the weather of cities near Rapperswil-Jona:
- Weather Rüti (ZH)
- Weather Dürnten
- Weather Bubikon
- Weather Wangen (SZ)
- Weather Hombrechtikon
- Weather Freienbach
- Weather Hinwil
- Weather Lachen
- Weather Schmerikon
- Weather Stäfa
- Weather Galgenen
- Weather Grüningen
→ Nearby cities · Canton St. Gallen
Frequently asked questions about weather in Rapperswil-Jona
What is the weather in Rapperswil-Jona today?
At the top of the page you will find the current temperature, precipitation and wind in Rapperswil-Jona, updated in real time.
What is the 15-day forecast for Rapperswil-Jona?
The "15-day forecast" section shows min/max temperatures, precipitation and wind expected for the next 15 days in Rapperswil-Jona.
Will it rain tomorrow in Rapperswil-Jona?
Check the 48-hour hourly forecast to see exactly when precipitation is expected in Rapperswil-Jona.
What is the air quality in Rapperswil-Jona?
The air quality section displays the AQI index and PM2.5, PM10 and ozone concentrations measured near Rapperswil-Jona.
Are there weather alerts for Rapperswil-Jona?
Weather alerts (storms, high winds, extreme temperatures) are shown as a banner at the top of the page when active.
At what altitude is Rapperswil-Jona located?
Rapperswil-Jona sits at around 459 m above sea level in the canton of St. Gallen. This elevation directly affects the temperatures, rain-snow line and snow cover shown in the forecasts.
What is the warmest month in Rapperswil-Jona?
The warmest month in Rapperswil-Jona is July, averaging 19.1 °C (1991–2020 normal). The coldest is January at 1.7 °C.
How much does it rain in Rapperswil-Jona per year?
Rapperswil-Jona receives about 1352 mm of precipitation a year. The wettest month is August (161 mm), the driest February (78 mm).
When is the best time to visit Rapperswil-Jona?
For warmth and sunshine: July (19.1 °C on average, 234 h of sun). The coldest month is January (1.7 °C). Check the 15-day forecast above for your dates.