Tallinn records about 650mm of rain across roughly 155 wet days a year, which is a 42% chance on an average day. August is the wettest month at 85mm (13% of the annual total) and February the driest at 30mm. Local rain type: drizzle. Tallinn gets frequent light rain and drizzle, especially in summer and autumn. Snowfall replaces rain from December to March. A compact umbrella handles most conditions.
Chance of rain on an average day: 42%
Rainfall climatology for Tallinn. 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 | 650mm |
| Rain days per year | 155 |
| Odds on an average day | 42% |
| Wettest month | August — 85mm over 20 days |
| Driest month | February — 30mm over 7 days |
| Rain type | drizzle |
| Best dry window | April through June offers the driest weather combined with increasingly long days (up to 19 hours of daylight in June). |
| Worst rain window | July and August are the wettest months with frequent showers, though temperatures are at their warmest. |
August delivers 183% more rain than February (85mm vs 30mm). That gap is the difference between planning around showers and ignoring them.
No single month holds more than 13% of the annual total, so rain in Tallinn is spread through the year — there is no season you can rely on being dry.
Tallinn rain is mostly persistent drizzle, where a waterproof shell beats an umbrella.
Rain falls on about 20 days in August against 7 in February — 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 | 40mm | 9 | 30% | -1°C |
| February | 30mm | 7 | 23% | -1°C |
| March | 35mm | 8 | 27% | 2°C |
| April | 35mm | 8 | 27% | 8°C |
| May | 40mm | 9 | 30% | 13°C |
| June | 65mm | 15 | 50% | 19°C |
| July | 80mm | 19 | 63% | 22°C |
| August | 85mm | 20 | 67% | 22°C |
| September | 65mm | 15 | 50% | 19°C |
| October | 70mm | 17 | 57% | 13°C |
| November | 60mm | 14 | 47% | 8°C |
| December | 50mm | 12 | 40% | 2°C |
Rain probability is the chance that at least 0.2mm falls at your location — not how long it rains. For Tallinn 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.
Tallinn records rain on roughly 155 days a year — about a 42% chance on any given day — totalling around 650mm.
August, with about 85mm over 20 rain days. That is 13% of the entire year's rainfall in a single month.
February is the driest month at 30mm across roughly 7 days. April through June offers the driest weather combined with increasingly long days (up to 19 hours of daylight in June).
Tallinn gets frequent light rain and drizzle, especially in summer and autumn. Snowfall replaces rain from December to March. A compact umbrella handles most conditions.
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.