Climate and monthly weather forecast
Jungfraujoch, Switzerland

Placed high among the mighty Swiss Alps, the picturesque Jungfraujoch experiences a marine west coast climate with a warm summer, often classified under the Koppen Climate Classification as 'Cfb'. This classification reflects a milieu characterized by moderate temperatures and considerable precipitation. Observing the monthly climatic breakdown shows a distinctive trend.

While temperatures fluctuate moderately throughout the year, ranging from an average high of -2.3°C (27.9°F) in November to a low of -16.4°C (2.5°F) in February, the relative humidity hovers between 63.4% in October to a high of 77.9% in May. Clearly, Jungfraujoch tends to be on the colder side throughout the year, owing to its high-altitude location. The amount of daylight varies from a low of 8.7 hours per day in December to a high of 15.8 hours per day in June. Similarly, the average hours of sunshine vary from 3.5 per day in December to 6.4 per day in July.

Unique weather patterns emerge from these climatic parameters, such as distinctly bitter cold months from December to March when average temperatures stoop lower than -10°C (14°F). Further, lush months from May to August witness relatively high humidity levels above 72%.

Factor in the climatic characteristics, and the prime time to explore Jungfraujoch is undeniably between June and August. During these months, temperature highs gravitate around a milder 3.1°C (37.6°F), which is relatively warmer than any other period during the year. The sunlight hours peak to an average of 15.6 hours providing copious daylight for sightseeing. Average humidity levels of 73.8% underscore the balmy and moderately moist atmosphere.

On contrary, it's highly advised to avoid travelling to Jungfraujoch in colder months from December to February. Low temperatures sink to about -15.6°C (3.9°F) in this particular span. Paired with shorter daylight hours dropping to around 9.4 hours in December, and the least amount of sunshine, 4 hours on average, the conditions are barely conducive for outdoor activities.

Spring, spreading between March to May, experiences a slow thermal upward trend, with high temperatures migrating from -9.4°C (15.1°F) in March to slightly milder -2.5°C (27.5°F) in May. Relative humidity is observed at its annual peak with averages ascending from 72% in March to 77.9% in May, indicating a moist and fresh atmosphere. Sunshine hours trend upwards from 4.9h to 5.2h a day, offering extended periods for sightseeing and mountain treks.

Summer months from June to August epitomize a relatively warmer period with temperatures ascending to summer highs of 3.1°C (37.6°F) in July. Carry an extra pair of sunglasses as sunshine hours clock in at a generous 6.3 hours/day in August. Luminescent days persist as daylight elongates from 15.4 hours/day in June to a comfortable 14.1hours/day in August. With humidity oscillating from 76.7% to 72.2%, prepare for a refreshingly moist excursion to Jungfraujoch.

Autumn, stretching from September to November, ushers in a cooling trend with temperatures plummeting from 0.3°C (32.5°F) in September to -2.3°C (27.9°F) in November. Relative humidity drops proportionately from 67.4% in September to 63.4% in October. There’s a minor dip in daylight hours, sliding from 12.6 hours/day in September to less than 10.9 hours/day in November.

Winter lays its frigid grip on the high altitude zone from December till February. Temperatures stoop significantly, with a low average temperature of -15.7°C (3.7°F) in December and -16.4°C (2.5°F) in February. This is further exacerbated by reduced daylight hours, shrinking to a mere 8.7 hours/day in December, and similarly fewer sunshine hours, limiting to an average low of 3.5 hours/day in December. Considering its altitude, it's essential to pack adequate cold weather gear when venturing here in winter months.

January in Jungfraujoch, Switzerland exhibits true winter characteristics. The temperature ranges from -9.7°C (14.5°F) at its highest point to -15.7°C (3.7°F) when the chill is most severe. Wintry conditions persist throughout the month, with the climate being slightly milder than in February. Weather in January »

The last month of the winter, February, is extremely cold month in Jungfraujoch, Switzerland, with an average temperature fluctuating between -10.5°C (13.1°F) and -16.4°C (2.5°F). The month of February, characterized by an average high of -10.5°C (13.1°F) and a low of -16.4°C (2.5°F), is recognized as the coldest. Weather in February »

March, the first month of the spring in Jungfraujoch, is a subzero cold month, with temperature in the range of an average low of -15.1°C (4.8°F) and an average high of -9.4°C (15.1°F). Jungfraujoch records an average high-temperature of a subzero cold -9.4°C (15.1°F) in March, maintaining a close correlation with February's -10.5°C (13.1°F). Weather in March »

In Jungfraujoch, April marks the advent of warmer weather. Temperature varies from -7°C (19.4°F) to -12.7°C (9.1°F), a tangible change from prior months. It's during this month that the snow starts to recede, allowing for patches of earth to be seen. Weather in April »

In May, Jungfraujoch transitions into a period of relative warmth. The temperature usually fluctuates from -7.9°C (17.8°F) to -2.5°C (27.5°F), the highest seen so far in the year. The climate during this period is largely characterized by the melting snow, which gradually disappears. Weather in May »

The weather in June is almost comparable to May, with a slight increase in warmth and temperature touching around -4.9°C (23.2°F) to 0.8°C (33.4°F). Weather conditions during this month are noticeably milder, evoking the allure of the brief summer season at high altitudes. Weather in June »

July in Jungfraujoch tends to be the warmest month, with temperatures ranging between -2.3°C (27.9°F) and 3.1°C (37.6°F), the highest recorded so far. The increase in temperature does not curtail the potential for cold snaps, a characteristic element of mountaintop weather. Weather in July »

The weather conditions throughout August follow closely those seen in July. Temperatures fluctuate from -2.2°C (28°F) to 3°C (37.4°F), making August another relatively warmer month. Cozy conditions persist, drawing hikers and outdoors enthusiasts for exploration. Weather in August »

As September arrives, slight signs of autumn start to manifest. The temperature varies between -4.8°C (23.4°F) and 0.3°C (32.5°F), marking a decrease compared to August. September introduces significant changes in the environment, with the lush greenery beginning to fade. Weather in September »

Signs of early winter mark October in Jungfraujoch, with temperatures ranging from -7.5°C (18.5°F) to -2.3°C (27.9°F), a stark contrast from September's relative warmth. It's during October that the land starts wearing a white coat, as snowfall frequency increases. Weather in October »

November exhibits stronger signs of winter, with temperature falling between -12.3°C (9.9°F) and -6.9°C (19.6°F). Compared to October, this month is significantly colder, with snowfall becoming a regular phenomenon. The severe weather conditions seen in November mark a sharp transition from the remnants of autumn that lingered in October. Weather in November »

December is marked by intense winter weather, with temperatures varying from -14.7°C (5.5°F) to -8.9°C (16°F). The climatic conditions are relatively cooler than in November, signaling the arrival of a harsh winter. Snow blankets the landscape, turning Jungfraujoch into a paradise for skiers and winter lovers alike. Weather in December »