Swiss records

Swiss records in terms of temperature, precipitation and wind are shown below.

Temperatures

Temperatures (2m above ground)
Warmest location    
Locarno-Monti (TI)
367 m asl
12.4 °C average annual temperature 1981-2010 (1)
Lugano (TI)
273 m asl
12.4 °C average annual temperature 1981-2010 (1)
Coldest location    
Jungfraujoch
3,580 m asl
-7.2 °C average annual temperature 1981-2010 (1)
Highest temperature    
Grono (GR)**
382 m asl
41.5 °C 11 August 2003
Lowest temperature    
La Brévine (NE)*
1,048 m asl
-41.8 °C 12 January 1987

* The measurement series from La Brévine (minimum and maximum temperatures) was homogenised in 2011. In the process of doing so, it was found that the minimum temperature of -41.8 °C measured on 12 January 1987 would have been equivalent to -42.5 °C under today's measurement conditions. The difference is due to the transition, in October 1997, from the former manual system of measurements (in a measuring hut) to an automatic measuring system.

** At the time, the Grono measurement station was located on the slope a little way above the village, hence the slightly higher altitude than today's location. Current measurement conditions on the valley floor would have given a maximum daytime temperature reading of 40.5 °C in Grono on 11 August 2003.

Rain and snow

Dryest location    
Stalden-Ackersand (VS)
700 m asl
545 mm average annual precipitation 1981-2010 (1)
Wettest location    
Säntis
2,502 m asl
2'837 mm average annual precipitation 1981-2010 (1)
Highest volume
of rain
     
in 10 minutes Lausanne
601 m asl
41.0 mm 06 June 2018
in 1 hour Locarno-Monti (TI)
366 m asl
91.2 mm 28 August 1997
in 1 day Camedo (TI)
550 m asl
455 mm 26 August 1935
in 2 days Mosogno (TI)
760 m asl
612 mm 23/24 September 1924
in 3 days Camedo (TI)
550 m asl
768 mm 3 - 5 September 1948
in 1 month Camedo (TI)
550 m asl
1,239 mm April 1986 (1)
in 1 year Säntis
2,502 m asl
4,173 mm 1922 (1)
Deepest snow      
  Säntis
2,502 m asl
816 cm April 1999
Greatest volume
of snow
     
in 1 day Bernina Pass,
2,307 m asl
130 cm 15 April 1999
in 1 day  Grimsel Hospiz,
1'980 m asl 
130 cm  30 March 2018 
in 2 days Bernina Pass,
2,307 m asl
215 cm 15/16 April 1999
in 3 days Weissfluhjoch
2,690 m asl
229 cm 13 - 15 February 1990

Heavy precipitation

The average of the highest precipitation sums over a specified period of a year provides information about the geographical distribution of heavy precipitation. This is shown in the following graph of one-day precipitation sums, in mm, (from 1961 to 2014).

Enlargement: Map of Switzerland with the average annual maximum 1-day precipitation sum. Maximum values were measured in the Ticino. One-day precipitation is also strong along the northern alpine rim.
Average annual maximum 1-day precipitation sum [mm]. The average values is based on the period 1961-2014. © MeteoSwiss

The heaviest precipitation normally falls in Ticino, where the southern orographic effect is primarily responsible for the large amounts of rainfall. The peak amounts of rainfall found in the inner Alpine valleys, in particular, in the Rhone valley, are more modest in comparison. In the Swiss plateau, it is thunderstorms that are the main cause of heavy precipitation events, and it is unsurprising, therefore, that the heaviest precipitation in that region occurs primarily during the summer months.

Storms and wind

Highest wind speed (gusts)
In the mountains    
Grand St Bernard 268 km/h 27 February 1990
(Hurricane Vivian)
In the lowlands    
Glarus 190 km/h 15 July 1985
(thunderstorm)