Tbilisi records about 510mm of rain across roughly 90 wet days a year, which is a 25% chance on an average day. May is the wettest month at 75mm (15% of the annual total) and January the driest at 20mm. Local rain type: brief showers. Tbilisi is relatively dry for a Caucasus city. Spring showers are the most common rain, while summers are hot and dry. An umbrella is handy in April-June but unnecessary most other months.
Chance of rain on an average day: 25%
Rainfall climatology for Tbilisi. The live hour-by-hour answer for today loads at the top of this page from Open-Meteo and refreshes through the day — the figures below describe a typical year, not today.
Last updated: · Live forecast data refreshes hourly.
| Annual rainfall | 510mm |
| Rain days per year | 90 |
| Odds on an average day | 25% |
| Wettest month | May — 75mm over 14 days |
| Driest month | January — 20mm over 4 days |
| Rain type | brief showers |
| Best dry window | July through September is the driest period with hot, stable weather perfect for exploring the old town and day trips. |
| Worst rain window | May and June bring the most precipitation, often as afternoon thunderstorms that cool the city from spring heat. |
May delivers 275% more rain than January (75mm vs 20mm). That gap is the difference between planning around showers and ignoring them.
No single month holds more than 15% of the annual total, so rain in Tbilisi is spread through the year — there is no season you can rely on being dry.
Tbilisi rain typically comes as discrete showers, so a compact umbrella and a flexible plan are usually enough.
Rain falls on about 14 days in May against 4 in January — the frequency swing matters more for planning than the millimetre totals.
Climate normals. Use them to judge whether today's live forecast at the top of the page is typical or unusual for the season.
| Month | Rainfall | Rain days | Chance on a given day | Highs |
|---|---|---|---|---|
| January | 20mm | 4 | 13% | 7°C |
| February | 25mm | 5 | 17% | 7°C |
| March | 35mm | 6 | 20% | 11°C |
| April | 50mm | 9 | 30% | 17°C |
| May | 75mm | 14 | 47% | 23°C |
| June | 70mm | 13 | 43% | 29°C |
| July | 40mm | 7 | 23% | 33°C |
| August | 35mm | 6 | 20% | 33°C |
| September | 40mm | 7 | 23% | 29°C |
| October | 40mm | 7 | 23% | 23°C |
| November | 35mm | 6 | 20% | 17°C |
| December | 25mm | 5 | 17% | 11°C |
Rain probability is the chance that at least 0.2mm falls at your location — not how long it rains. For Tbilisi we combine the hourly probability curve, expected volume in millimetres, and the city's own rainfall record into a single umbrella verdict.
| Factor | Weight | What it measures |
|---|---|---|
| Hourly probability | 40% | Peak and sustained chance of measurable rain across the next 24 hours. |
| Expected volume | 30% | Total millimetres, which separates a passing shower from a genuine soaking. |
| Timing & duration | 20% | When rain starts, when it eases, and the longest continuous dry window. |
| Local rain type | 10% | Drizzle, brief showers, thunderstorms or monsoon — each needs different gear. |
Live hourly values come from Open-Meteo and refresh through the day. Monthly rainfall figures are climate normals, so they describe a typical year rather than a forecast.
Tbilisi records rain on roughly 90 days a year — about a 25% chance on any given day — totalling around 510mm.
May, with about 75mm over 14 rain days. That is 15% of the entire year's rainfall in a single month.
January is the driest month at 20mm across roughly 4 days. July through September is the driest period with hot, stable weather perfect for exploring the old town and day trips.
Tbilisi is relatively dry for a Caucasus city. Spring showers are the most common rain, while summers are hot and dry. An umbrella is handy in April-June but unnecessary most other months.
No. Probability is the chance that at least 0.2mm of rain falls at your location at some point in the period. Check the expected millimetres alongside it: 40% with 0.4mm is a passing shower, 40% with 12mm is a soaking.