Slovakia climate

Monthly averages for Bratislava, 2021–2025

In Bratislava, the warmest month is July, with an average high of 28°C, and the coldest is January, when nights average −1°C.

About 628 mm of rain falls in a year, on roughly 106 days. September is the wettest month (81 mm) and February the driest (29 mm).

Wind is strongest in April (14 km/h on average) and lightest in August (11 km/h).

Compared with Dublin, July afternoons are 8°C warmer, and January afternoons 3°C colder.

The hottest day in 2021–2025 reached 36.7°C (3 July 2025), and the coldest night fell to −9.2°C (12 February 2021).

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.

Bratislava month by month
Month	High °C	Low °C	Rain mm	Rain days	Sun h/day	Wind km/h
January	5	−1	44	11	4.6	14
February	8	0	29	7	6.5	14
March	12	2	29	6	8.8	13
April	15	6	51	10	9.6	14
May	20	11	67	10	10.8	13
June	26	16	62	9	13.0	11
July	28	18	54	9	12.6	12
August	27	17	68	8	11.5	11
September	22	13	81	10	9.2	12
October	16	8	42	8	7.6	13
November	9	3	51	9	4.7	12
December	5	0	50	9	3.5	13