The best month to visit Bern is September when the daily average temperature is 13C (56F) with 8/30 rainy days. However, the three summer months June-August are acceptably dry with a 1/3 chance of rain while high temperatures range from 21C-23C, so strolling the shady streets and arcades is fine then. October is also usually dry but considerably cooler with a mean of 9C (47F).
All in all Berne is one of the drier, smaller cities in Switzerland with moderate temperatures so perhaps tourists should base their travel plans on other trickier Swiss destinations since Bern can be fitted into most itineraries, such as holidays in Lucerne or Vevey, trips to Zurich or jazz in Montreux.
By road Bern is around 1-2 hours to these cities on fine tho’ busy motorways/autoroutes, but watch out for speed cameras, your SatNav may not warn you about them! (most of Europe yes, Switzerland, no! )
A 16th century drinking fountain topped by Samson killing a lion (a biblical story); Kramgasse, a street that was also home for a while to Albert Einstein at No. 49, Einsteinhaus. Berne provides the thirsty passer-by with over 100 drinking fountains, eleven of which are crowned by allegorical statues from the 16th century, usually colourful and occasionally grotesque.
Taking an arcade break overlooking the blindfolded eyes of the Justice Fountain in Gerechtigkeitsgasse.