Luxembourg climate

Monthly averages for Luxembourg, 2021–2025

In Luxembourg, the warmest month is August, with an average high of 23°C, and the coldest is January, when nights average 0°C.

About 940 mm of rain falls in a year, on roughly 150 days. January is the wettest month (110 mm) and June the driest (61 mm).

Wind is strongest in January (15 km/h on average) and lightest in June (11 km/h).

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

The hottest day in 2021–2025 reached 35.1°C (19 July 2022), and the coldest night fell to −10.0°C (16 January 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.

Luxembourg month by month
Month	High °C	Low °C	Rain mm	Rain days	Sun h/day	Wind km/h
January	5	0	110	14	2.9	15
February	8	1	66	12	4.9	15
March	11	2	69	12	7.7	13
April	13	4	64	11	9.4	14
May	18	8	76	13	11.1	13
June	23	13	61	10	12.1	11
July	23	13	91	12	11.5	12
August	23	14	65	12	11.1	11
September	20	11	98	12	9.2	12
October	15	8	91	14	6.3	13
November	9	3	81	14	3.5	14
December	6	2	68	14	2.4	14