Switzerland climate

Monthly averages for Bern, 2021–2025

In Bern, the warmest month is July, with an average high of 24°C, and the coldest is January, when nights average −3°C.

About 1364 mm of rain falls in a year, on roughly 163 days. July is the wettest month (164 mm) and February the driest (48 mm).

Wind is strongest in April (9 km/h on average) and lightest in August (7 km/h).

Compared with Dublin, July afternoons are 5°C warmer, and January afternoons 4°C colder.

The hottest day in 2021–2025 reached 36.4°C (24 August 2023), and the coldest night fell to −15.6°C (11 December 2022).

Temperature

Bars run from the average night-time low to the average daytime high, in °C.

Average total rainfall each month, in millimetres.

Average wind speed at 10 metres each month, in km/h.

Bern month by month
Month	High °C	Low °C	Rain mm	Rain days	Sun h/day	Wind km/h
January	5	−3	99	14	5.1	8
February	8	−1	48	10	6.7	8
March	11	1	78	12	8.3	8
April	13	3	94	13	9.7	9
May	17	8	149	18	10.3	8
June	24	13	136	15	12.4	7
July	24	14	164	17	12.4	7
August	24	14	116	12	11.2	7
September	20	10	132	12	9.5	7
October	15	6	102	12	7.5	7
November	8	1	132	15	5.4	7
December	5	−2	114	12	4.7	7