Climate Chart of Basel, Switzerland

Monthly data: Temperature °C, Rain (mm), Sunshine (h) · 2013–2023

For Basel, Switzerland, the climate data cover 2013–2023. The monthly mean temperature ranges from January at 2.4 °C to July at 21.1 °C, giving a broad sense of the annual temperature pattern. Daily sunshine averages also vary, from December at 3.89 hours/day to June at 11.81 hours/day. Rainfall and snowfall figures describe mean daily amounts, so they indicate typical levels rather than monthly accumulations or the frequency of precipitation.

Climate overview

Temperature

Monthly mean temperatures are lowest in January, at 2.4 °C, and highest in July, at 21.1 °C. These are monthly averages, not daytime maximum temperatures, so they describe the broader temperature level visitors may encounter rather than the full range within a day. The unweighted mean across monthly means is 11.3 °C; it is not a day-weighted annual average.

Rain

The mean daily rainfall is lowest in March, at 1.95 mm/day, and highest in May, at 3.35 mm/day. These daily averages help distinguish months by typical rainfall amount, but do not show how often rain falls or guarantee dry or wet days. The unweighted mean of the monthly daily means is 2.56 mm/day, not a monthly total or a day-weighted annual average.

Sunshine

Mean daily sunshine reaches its highest level in June, at 11.81 hours/day, and its lowest in December, at 3.89 hours/day. These figures can help set expectations for average sunshine duration when planning time outdoors, but sunshine hours are not the same as day length. The unweighted mean across monthly means is 7.93 hours/day.

Snow

The highest monthly mean daily snowfall occurs in January, at 3.32 mm/day; the unweighted mean of monthly daily snowfall means is 0.87 mm/day. These are daily average amounts, not monthly totals. They do not establish how many days have snowfall, how deep snow may be, whether it accumulates as snow cover, or whether conditions suit skiing.

Best Travel Time Guide for Basel, Switzerland: Ideal Seasons and Weather Insights

If lower average rainfall is your priority, March is the relevant option in these records, with mean daily rainfall of 1.95 mm/day. This is a monthly average, not a promise of dry days or a measure of rain frequency, so keep flexible plans and suitable rain protection in mind. For rain preparation, note that the highest mean daily rainfall is recorded in May, at 3.35 mm/day. Visitors prioritising cooler monthly mean conditions may prefer January, when the mean is 2.4 °C; this is not a daytime maximum and cannot describe every day's range. For outdoor sightseeing guided by average sunshine duration, June has the highest mean at 11.81 hours/day, while December has the lowest at 3.89 hours/day. These are separate criteria, not a single best-time ranking, and sunshine duration does not indicate day length.

Climate Data Overview for Basel, Switzerland

Explore the comprehensive climate data for Basel, Switzerland. This detailed table provides valuable insights into temperature variations, precipitation levels, and seasonal changes, helping you understand the unique weather patterns of this region.

Month	Average: Temperature °C	Rain (mm) / day	Snow (mm) / day	Sunshine (h) / day
Jan	2.4	2.39	3.32	3.93
Feb	3.5	2.13	2.39	5.84
Mar	6.4	1.95	0.89	7.82
Apr	10.2	2.53	0.81	9.28
May	13.9	3.35	0.03	9.92
Jun	19.2	2.68	0.00	11.81
Jul	21.1	2.74	0.00	11.75
Aug	20.4	2.53	0.00	10.48
Sep	16.4	2.16	0.00	9.06
Oct	11.9	2.71	0.01	6.67
Nov	6.3	3.12	0.98	4.67
Dec	3.5	2.46	1.95	3.89
Average	11.3	2.56	0.87	7.93