Climate zones in Georgia, 1991 to 2020
Share of Georgia's classified land in each Köppen-Geiger zone in 1991 to 2020. Zones under 0.05% are left out. The 108,852 map cells used cover 100% of the country's outline (about 69,271 km²).
By major group: D (cold (continental)) 59%, C (temperate) 38%, E (polar) 3.3%, B (arid) 0.3%.
Georgia has no single dominant climate. The biggest zone, Dfb (warm-summer humid continental), covers only 43% of its classified land in 1991 to 2020, followed by Cfa (35%) and Dfc (13%). 6 zones each cover 1% or more of it. In plain terms, warm-summer humid continental means warm summers and cold, snowy winters, with rain all year. Under the middle-of-the-road scenario (SSP2-4.5), 36% of its land is projected to be in a different zone by 2071 to 2099, with the biggest gain going to Cfa (humid subtropical). The most common zone would then be Cfa (humid subtropical).
How Georgia's zones have changed and may change
Each row compares a map with 1991 to 2020. "Share in a different zone" is the share of the country's area whose class is different from 1991 to 2020. Future rows are model projections under an emissions scenario, not forecasts.
| Map | Share in a different zone | Different major group | Biggest gain | Biggest loss |
|---|---|---|---|---|
| 1901 to 1930 (past) | 21% | 12% | Cfa +9.6 percentage points | Dfa -3.2 percentage points |
| 2071 to 2099, SSP1-2.6 (low emissions) | 23% | 11% | Cfa +10.1 percentage points | Dfc -5.1 percentage points |
| 2071 to 2099, SSP2-4.5 (middle of the road) | 36% | 18% | Cfa +15.2 percentage points | Dfc -7.3 percentage points |
| 2071 to 2099, SSP5-8.5 (high emissions) | 57% | 30% | Cfa +24.1 percentage points | Dfb -17.7 percentage points |
For the past row, the comparison runs the other way: the 1901 to 1930 map against 1991 to 2020.
Zone shares by map
| Zone | 1901 to 1930 | 1991 to 2020 | SSP1-2.6 (2071 to 2099) | SSP2-4.5 (2071 to 2099) | SSP5-8.5 (2071 to 2099) |
|---|---|---|---|---|---|
| Dfb Warm-summer humid continental | 44% | 43% | 42% | 37% | 26% |
| Cfa Humid subtropical | 25% | 35% | 45% | 50% | 59% |
| Dfc Subarctic (boreal) | 16% | 13% | 7.6% | 5.4% | 1.9% |
| ET Tundra | 5% | 3.3% | 1.2% | 0.5% | 0.1% |
| Cfb Temperate oceanic | 4% | 3% | 1.9% | 1.2% | - |
| Dfa Hot-summer humid continental | 6% | 2.7% | 1.8% | 4.9% | 10% |
| BSk Cold semi-arid (steppe) | 0.1% | 0.3% | 0.4% | 1.1% | 0.1% |
| BSh Hot semi-arid (steppe) | - | - | - | 0.2% | 3.1% |
Percentages are of the country's classified land in each map. A dash means under 0.05%.
Cities in Georgia and their climate zones
| City | 1991 to 2020 | 2071 to 2099, SSP2-4.5 |
|---|---|---|
| Tbilisi | Cfa Humid subtropical | Cfa Humid subtropical |
Zones found in Georgia
Data: Beck et al. (2023), CC BY 4.0; country outlines from Natural Earth. In 1901 to 1930 the most common zone was Dfb. See data sources and licences.