Tramelan (CH) is located in the temperate oceanic climate zone (Cfb), according to the Köppen climate classification. This is characterized by mild summers and cool winters with no dry season.
Here`s a list of the weather for the four seasons:
Spring (March - May):
- Temperatures: Gradually warming, ranging from cool to mild. Average temperatures typically start around 5-10°C (41-50°F) in early spring and rise to 15-20°C (59-68°F) by late spring.
- Precipitation: Frequent rainfall, often showery. Snowfall is still possible, especially in early spring, but becomes less common as the season progresses.
- Daylight: Increasing significantly.
- General Conditions: Unpredictable, with a mix of sunny days and rainy periods. Nature begins to bloom.
Summer (June - August):
- Temperatures: Warmest period of the year, with average highs between 20-25°C (68-77°F). Heatwaves with temperatures exceeding 30°C (86°F) can occur but are not the norm.
- Precipitation: Moderate rainfall, often in the form of thunderstorms, particularly in the afternoons.
- Daylight: Longest days of the year.
- General Conditions: Generally pleasant, with a good balance of sunshine and rain. Ideal for outdoor activities.
Autumn (September - November):
- Temperatures: Gradually cooling. September can still be mild, while November brings significantly cooler temperatures, often dropping to 5-10°C (41-50°F).
- Precipitation: Increasing rainfall, can be persistent. Early autumn might still see some sunny days, but they become scarcer.
- Daylight: Decreasing significantly.
- General Conditions: Beautifully colored foliage. Weather becomes increasingly damp and chilly. Frosts become common by late autumn.
Winter (December - February):
- Temperatures: Coldest period of the year. Average temperatures are often between 0-5°C (32-41°F), with frequent sub-zero temperatures, especially at night.
- Precipitation: Snowfall is common and can accumulate, creating winter landscapes. Freezing rain and sleet are also possible.
- Daylight: Shortest days of the year.
- General Conditions: Cold and often grey, with a high chance of snow. Ideal for winter sports if snow conditions are good.
Short Summary:
Tramelan experiences a temperate oceanic climate characterized by distinct but mild seasons. Summers are warm with moderate rainfall, while winters are cold with regular snowfall. Spring and autumn are transitional periods with cooling or warming temperatures, and variable precipitation. The region enjoys a good amount of daylight in summer, which shortens considerably in winter.