🇹🇯Tajikistan

Tajikistan (approximately 143,100 km²) is a landlocked mountainous nation in Central Asia between 36°–41°N and 67°–75°E, with over 93% of its territory covered by mountains, making it one of the most elevated countries on Earth. The nation encompasses the towering Pamir Mountains in the east (the 'Roof of the World') reaching 7,495 m at Ismoil Somoni Peak, the Trans-Alay Range in the north bordering Kyrgyzstan, and the lower Fergana Valley periphery in the northwest descending to approximately 300 m elevation.

The climate is predominantly continental with extreme temperature variations: hot dry summers in lower valleys and bitter cold in the high eastern Pamirs, where January mean temperatures are −15 to −20°C. The Pamirs harbor the Fedchenko Glacier (approximately 77 km long), the longest glacier outside the polar regions and a critical freshwater reservoir that has been retreating.

Annual precipitation varies dramatically by elevation and exposure: the capital Dushanbe receives around 620–650 mm concentrated in winter and spring, the Fergana Valley periphery sees 150–300 mm, while parts of the high Pamirs receive much more, largely as snow.

Tajikistan's rivers, including the Vakhsh (a major tributary of the Amu Darya) and portions of the Syr Darya basin, depend almost entirely on glacial melt and seasonal snowpack, forming more than half of the Aral Sea basin's river flow and generating around 90% of Tajikistan's electricity through hydropower.

Dushanbe (capital, elevation 800 m) has January highs of about 9°C with nights near −1°C and July highs of about 36°C, with approximately 620–650 mm annual precipitation. Khujand (at the mouth of the Fergana Valley, 300 m) records January highs of about 4°C with nights near −2°C and July highs of about 36°C, with around 170 mm, and summer maxima can exceed 40°C.

Khorog (capital of Gorno-Badakhshan Autonomous Oblast, about 2,100 m elevation in the Pamir foothills) registers January highs of about −1°C with nights near −11°C and July highs of about 30°C, with roughly 220 mm, and the surrounding valleys face recurring glacial lake outburst floods (GLOFs) and severe debris flows from destabilized moraines and periglacial slopes: the Dasht outburst flood of 2002 hit the village of Dasht, and the Barsem debris flows of July 2015 dammed the Gunt River.

Glacial lakes across the Pamirs, many perched behind unstable moraine dams, pose an escalating outburst-flood threat.

Sarez Lake, formed by a massive 1911 earthquake-triggered landslide, holds more than 16 cubic kilometers of water behind a natural dam and poses an existential transboundary flood risk to downstream communities in Tajikistan and Afghanistan.

Accelerating glacier retreat and declining snowpack threaten the Vakhsh and Syr Darya river flows, jeopardizing irrigation for Tajikistan's cotton and wheat agriculture and destabilizing regional water-sharing agreements. IPCC projections indicate substantial warming in Central Asia by 2100 under high-emission scenarios, with summer glacier melt increasing short-term runoff followed by severe long-term water shortages as glaciers disappear.

Our archive covers 7 Tajik cities with daily ERA5 reanalysis data going back to 1940. The hottest July afternoons are in Bokhtar, with average highs around 38.1°C, while Istaravshan has the coldest January nights, with average lows near −5.5°C. Comparing the last decade against the 1940–1970 baseline, mean temperatures across these cities have risen by about 2°C.