Drought Conditions Continue Across Switzerland Despite Recent Rain

Switzerland continues to face persistent drought conditions even after recent rainfall, with water levels in many rivers and lakes remaining critically low across the Swiss Plateau.

According to hydrologist Manuela Brunner from the Institute for Snow and Avalanche Research (SLF), the recent precipitation has had only a limited impact. She described the rainfall as “a drop in the ocean,” highlighting the ongoing severity of the situation.

Water Levels Remain Below Average

Measurements show that water levels in several rivers and lakes on the Swiss Plateau have reached unusually low values, in some cases approaching record lows for this time of year.

Conditions in Alpine regions are slightly better compared to the lowlands, but even there, river flows remain below long-term seasonal averages.

Dry Spring and Low Snowpack Behind the Crisis

Experts point to the extremely dry months of April and May as the main reason for the ongoing drought. In addition, Switzerland experienced an unusually thin snowpack in the Alps during the winter season.

Normally, this period marks the peak of Switzerland’s flood season, when melting snow and heavy rainfall significantly increase river and lake levels. This year, however, the expected seasonal water surge has been significantly weakened.

In the Dischma Valley near Davos in eastern Switzerland, snow cover is reported to be roughly half of the long-term average, further contributing to reduced water runoff into rivers.

Environmental Concerns Growing

The continued low water levels raise concerns about agriculture, ecosystems, and water supply in affected regions. Experts warn that prolonged dry conditions could have wider impacts if the situation does not improve in the coming weeks.

Hydrologists continue to monitor the situation closely as Switzerland moves deeper into the summer season, when water demand typically increases.

Authorities and researchers stress that climate variability and changing precipitation patterns are increasingly influencing Switzerland’s water systems, making long-term monitoring and adaptation essential.

Switzerland Records Fourth Hottest May Since 1864 Amid Severe Dry Conditions

Switzerland is set to record its fourth hottest May since weather records began in 1864, according to the national meteorological service MeteoSwiss. The country is also experiencing unusually dry conditions across many regions.

Temperature Above Average

Meteorological data shows that temperatures in May 2026 have been approximately 1.8°C above the long-term average. The nationwide average daily temperature has reached 10.7°C so far this month.

Early rainfall at the beginning of May was not sufficient to compensate for a significant precipitation deficit that has developed since March.

Severe Rainfall Deficit

Rainfall levels across Switzerland have dropped sharply, with only around 56% of the average precipitation recorded nationally. In some regions, rainfall has fallen to just 40% of normal levels.

Canton Graubünden and the Engadine region have been particularly affected, receiving less than half of their typical rainfall.

Comparison With Historic Droughts

Experts note that current conditions resemble historic drought years such as 1944 and 1976. The ongoing spring season is also expected to rank among the driest since modern records began in 1901.

Government Weather Alert

The Swiss government has issued a Level 2 drought alert, currently affecting the Alps and eastern Plateau regions. Authorities classify this as a mild drought, with no immediate improvement expected in the short term.

Early Heatwave Conditions

Switzerland has already experienced early heatwave conditions, with temperatures exceeding 30°C in several regions. In Ticino and parts north of the Alps, temperatures have climbed above 34°C.

In Valais, the temperature reached 34.2°C in Sion, marking one of the earliest intense heat events of the season.

Impact on High Altitudes

Even high mountain regions have been affected. The 0°C isotherm rose to 4,328 metres above sea level during Whitsun weekend, making it one of the highest recorded levels for May.

Climate Change Influence

Meteorologists highlight that climate change is influencing seasonal patterns in Switzerland. Heatwaves are occurring earlier, lasting longer, and affecting higher altitudes with increasing intensity.

The Federal Office of Meteorology and Climatology warns that such extreme conditions are becoming more frequent across the Alpine region.

Swiss Glacier Snow Levels Critically Low

Glaciers across Switzerland are entering the summer season with significantly below-average snow cover, raising concerns about accelerated melting and long-term water availability.

According to the Swiss Glacier Monitoring Network (GLAMOS), snow cover across key Alpine glaciers is about 25% lower than the decade average, leaving ice masses unusually exposed at the start of the melt season.

Scientists report that the reduced winter snowfall has weakened the natural protective layer that normally shields glaciers from early summer heat. This layer typically reflects sunlight and slows ice loss, but current measurements show a much thinner snowpack across major glacier regions.

GLAMOS data collected from around 25 monitored glaciers indicates widespread deficits, with some areas experiencing snow shortages of several metres compared to long-term averages. The early onset of melting is already shifting the seasonal balance, causing glaciers to begin losing mass sooner than usual.

Regional variations are significant. In parts of southeastern Switzerland, including the Engadine region, snow deficits are particularly severe. Even major glacier systems such as the Great Aletsch Glacier and Rhône Glacier are reporting substantial reductions in winter accumulation.

Researchers warn that continued early-season melting could disrupt Switzerland’s role as the “Water Tower of Europe,” as glaciers regulate water flow into major river systems such as the Rhine, Rhône, and Po.

The reduced snow buffer may also impact hydroelectric power generation, agriculture, and downstream water availability across central and western Europe during late summer months.

Climate experts emphasize that while annual variability exists, the consistent pattern of reduced snow accumulation and earlier melt onset reflects a long-term trend linked to changing climate conditions in the Alps.

Gotthard Pass Reopens Ahead of Holiday Traffic.

The Gotthard Pass in Switzerland will reopen to road traffic on Friday at 11 a.m., earlier than expected due to favourable weather conditions.

The Federal Roads Office confirmed that clearing and repair work progressed faster than planned because of low snowfall this season. As a result, the winter closure of the pass will be lifted ahead of the busy holiday travel period.

The reopening is expected to ease traffic on the heavily used north–south route along the A2 motorway, especially during the upcoming Ascension and Whitsun holiday weekends.

With the pass reopening, the seasonal extension at the Göschenen exit will also return to operation. The extended three-kilometre lane, starting near Wassen, is designed to reduce congestion and prevent traffic from diverting into nearby villages.

On the southern side, a special traffic lane at Airolo will also be activated to manage holiday traffic flow more efficiently.

Authorities stated that these measures aim to improve safety and reduce congestion along one of Switzerland’s most important transit routes, which connects northern and southern Europe through the Alps.

The early reopening is expected to benefit both local commuters and international travelers using the route during the peak travel season.