Meteo Friburgo in Brisgovia in aprile

Zurich's forum calls April thoroughly unpredictable — daytime temperatures typically 12-18°C but capable of sunny 20°C afternoons or a return of winterly cold fronts, especially at higher elevations. Regulars note Zurich itself rarely sees snow this time of year even when the mountains do, and the standard packing advice is layers plus a genuinely wind- and waterproof jacket rather than trusting any single forecast.

Regulars are specific this counts as Germany's warmest and sunniest city, genuinely good odds of good weather though rainy, cool days remain possible at any point in the year regardless of reputation. Our row backs that warm, genuinely wet read, 25.5C over 13.3C nights feeling 13C, with a substantial 99.2mm of rain across 11.9 days and humidity at 73 percent. Regulars are consistent storms here run genuinely localised, one spot getting thunder, heavy rain and hail while another just a few kilometres away stays basically dry under the same system, typical of how hilly country channels weather. Checking conditions specifically for wherever you're headed in the Black Forest remains worthwhile regardless of the Freiburg forecast. The record: 12.1 hours of sun, an 11.9 kph wind and AQI 49.

Freiburg is usually Germany's warmest and sunniest city, sitting on the Upper Rhine plain, and the forum's regulars say your odds of good July weather here are as good as the country offers - while adding the German caveat that any month can turn wet and cool. The Black Forest behind the city is its own climate and swings widely across a summer day, which is the argument for basing yourself in the city and going up for the day: Triberg, the Vogtsbauernhof open-air museum, Gengenbach and Offenburg are all within reach, with Strasbourg and Baden-Baden not much further. The record: 26.7C days, 14.2C nights, 9 precipitation days, 12.3 hours of sun inside a 15.6-hour day, AQI 40.

Forum posters describe March here as genuinely bimodal - it can be mild and sunny, or it can drop to -10C with snow, and there's no reliable way to know which until close to the travel date. Posters do note Freiburg is generally considered Germany's warmest and sunniest city, so along a route through several German-speaking cities, it offers better odds of good weather than most alternatives - and going later in March specifically improves the chances that spring has properly arrived by the time of a visit. The consistent bottom-line advice: pack for both scenarios (a warm layer plus something genuinely winter-capable) rather than betting on either outcome.

Freiburg's forum calls it Germany's warmest and sunniest city, so odds of good September weather are better than most of the country, though the region is genuinely capable of a rainy, cool spell any time of year. Regulars note September is a pleasant month in the surrounding wine country as the grapes ripen, and recommend layers since daytime highs can swing widely from one week to the next.