🌅 Extreme Heat Days in Georgia

Extreme Heat Days in Georgia

Georgia averages approximately 10 days per year when temperatures exceed 35 °C nationally. This figure may sound moderate, but it masks extreme regional concentration: nearly all heat stress falls on Tbilisi and Kakheti, while the coast and mountain regions are virtually free of extreme heat. For expats and long-term residents, this is a decisive location factor affecting health, energy costs, and quality of life. The National Environmental Agency (NEA) and the Georgian Centre for Disease Control and Public Health (NCDC) provide the data basis for the following analysis.

Tbilisi: Heat Hotspot of the Caucasus

The capital bears the brunt of extreme heat. According to NEA long-term statistics (1991–2020), Tbilisi records an average of 15–20 days per year above 35 °C, concentrated in July and August. Peak individual readings are noteworthy: in August 2023, a maximum of 42.0 °C was recorded — the highest value since digital record-keeping began at the Tbilisi-Lochini station. The heatwave lasted 9 days with temperatures consistently above 37 °C and led, according to NCDC reporting, to a 35% increase in heat-related emergency admissions compared to the same period the previous year.

The urban heat island effect intensifies the situation: central Tbilisi (Old Town, Rustaveli Boulevard) runs 2–4 °C hotter than the surrounding countryside. Dense development in the Kura Valley impedes nighttime cooling — tropical nights (minimum above 20 °C) occur 20–30 times per year. The city government launched "Green Tbilisi" in 2022, targeting 500,000 new trees citywide by 2030 to reduce the heat island effect.

Kakheti: Silent Heat in Wine Country

Eastern Kakheti records similar numbers of extreme heat days as Tbilisi — roughly 12–18 days above 35 °C per year. In valley basins like the Alazani Valley (Telavi, Sighnaghi), air masses stagnate and the absence of sea breeze pushes July temperatures regularly to 37–39 °C. The National Wine Agency views this heat ambivalently: it drives sugar accumulation in grapes (up to 25° Brix for Saperavi) but risks leaf sunburn when temperatures exceed 40 °C. Since 2018, increasing numbers of winemakers have adopted shade netting — a phenomenon unknown in Kakheti a decade ago.

Batumi and the Coast: Minimal Extreme Heat

On the Black Sea coast, 35 °C is rarely exceeded — Batumi averages only 1–2 days per year above that threshold. The sea breeze (thermal land-sea wind cycle) provides reliable daytime cooling, and high evaporation from the sea surface absorbs heat energy. The highest temperature ever recorded in Batumi is 38.5 °C (August 2017), a value that Tbilisi surpasses multiple times in most summers. For heat-sensitive individuals, the coast is the safer choice — though humidity presents a different comfort challenge.

Mountain Regions: Heat-Free Zone

Above 1,500 m elevation, days exceeding 35 °C are virtually impossible. Stepantsminda (1,740 m) peaks at 28–30 °C in summer, Mestia (1,500 m) at similar values. In Ushguli (2,200 m), temperatures remain below 25 °C even in midsummer. For expats who cannot tolerate extreme heat for health reasons (cardiovascular patients, seniors), the mountain regions are a viable option — though with known limitations in infrastructure and winter accessibility.

Climate Change Trend: Documented Increase

NEA projections based on IPCC scenarios (RCP 4.5 and RCP 8.5) indicate an increase of 2–3 extreme heat days per decade for Tbilisi and Kakheti. The UNDP Georgia "Climate Risk Assessment" (2022) confirms this trend and warns that Tbilisi could experience up to 35 days above 35 °C per year by 2050 under the RCP 8.5 scenario — double the current figure. The Georgian government's National Adaptation Programme of Action (NAPA, 2021) outlines measures including urban greening and heat-adapted building regulations (maximum glass surface ratios, mandatory green roofs for new buildings above 1,000 m²).

Comparison with English-Speaking Countries

Washington D.C. averages about 20 days above 35 °C, Phoenix over 100, while London rarely sees a single such day. Sydney experiences roughly 5–10 days above 35 °C annually. Tbilisi thus sits between Washington D.C. and Sydney in heat exposure. However, Tbilisi lacks the heat protection infrastructure found in American or Australian cities: public drinking fountains are scarce, cooling centers do not exist, and many older buildings offer minimal thermal insulation. Anyone relocating from the UK or Canada to Tbilisi should make a functioning air conditioning unit an absolute prerequisite for summer housing.

Health Recommendations

The NCDC advises during heatwaves: avoid outdoor activity between noon and 4 PM, drink at least 2.5 liters of water daily, wear light cotton clothing. For outdoor workers (construction, agriculture), the Georgian Ministry of Labour issued heatbreak guidelines for the first time in 2023 — a step responding to the increasing frequency of extreme heat days. In daily life, it pays to structure the day around the heat pattern: schedule shopping and errands for mornings, reserve afternoons for indoor activities.

This article was created on April 19, 2026