The best time to visit Tallinn is June, July and August, when average highs reach the comfortable low twenties and daylight is at its longest. June sits at an average high of 20.1 °C with 11 rain days, while July climbs to 21.5 °C — ideal for wandering the Old Town's cobbled lanes. July and August are peak season, busy with school-holiday crowds and lively festivals. The quiet, low season runs through winter, when highs hover around freezing and sunshine drops to little more than an hour a day.
Best months JuneJulyAugust
Tallinn month by month
Average highs and lows (°C), 2016–2025. Highlighted bars are the best months.
| Month | High | Low | Rain days | Sun / day |
|---|---|---|---|---|
| January | -0.7 °C | -4.7 °C | 14 | 1.6 h |
| February | 0.1 °C | -4.1 °C | 12 | 3.3 h |
| March | 3.6 °C | -2.5 °C | 11 | 6.6 h |
| April | 8.7 °C | 0.9 °C | 10 | 10.2 h |
| May | 15.1 °C | 6 °C | 8 | 13.2 h |
| June | 20.1 °C | 11.7 °C | 11 | 14.1 h |
| July | 21.5 °C | 14.2 °C | 15 | 13.4 h |
| August | 20.6 °C | 13.7 °C | 16 | 11.1 h |
| September | 16.3 °C | 10.2 °C | 12 | 8.6 h |
| October | 9.7 °C | 5.2 °C | 15 | 4.9 h |
| November | 4.5 °C | 1.2 °C | 14 | 2.2 h |
| December | 1.2 °C | -2.4 °C | 14 | 1.1 h |
How the months are picked.A month qualifies when its average high sits in the comfortable 20–28 °C band (scored down towards 9 °C and 37 °C), rain days are few and sunshine hours are high — at least 78 % of the city's best-scoring month. July and August are then set aside as peak season (school-holiday crowds and prices) whenever at least three other months qualify; where summer is the only comfortable window they stay. Figures are ten-year averages (2016-01-01 to 2025-12-31) from ERA5 reanalysis data via Open-Meteo (CC BY 4.0) for the city centre coordinates.
When to go, and what to expect
Spring (Mar–May)
Great for travellers who want lengthening days and fewer crowds before summer arrives.
Summer (Jun–Aug)
The prime window for the Old Town and midsummer light — book ahead if visiting in peak weeks.
Autumn (Sep–Nov)
Good for early autumn colour and calm streets; damp and dark by November.
Winter (Dec–Feb)
Best for those chasing a snowy Old Town and Christmas market atmosphere.
Notable events
- December
- Tallinn Christmas Market on Town Hall Square
- June
- Jaanipäev (Midsummer / St John's Day)
- Late spring / early summer
- Tallinn Old Town Days
- Spring
- Tallinn Music Week
Frequently asked
Is Tallinn too hot in August?
No. August averages a high of 20.6 °C, comfortably in the mild band, though it is the rainiest summer month with 16 rain days.
What is the rainiest month in Tallinn?
August has the most rain days at 16, closely followed by July with 15; even so, summer stays the most pleasant time to visit.
Is winter worth visiting Tallinn?
It's atmospheric but cold and dark — January highs are -0.7 °C and December offers just 1.1 hours of sunshine a day. Go for the Christmas market and snowy Old Town rather than the weather.
Know when to go? Now decide where to stay — our Tallinn area guide →
Areas of Tallinn
Best time to visit near here
Sources
- Open-Meteo historical weather API — monthly climate normals, 2016–2025 (CC BY 4.0)
- ERA5 reanalysis (ECMWF / Copernicus) — the underlying temperature, precipitation and sunshine data
- ReasonStay methodology — how the best months are computed and checked
An independent guide to Tallinn — honest, verified, no invented data. Climate figures: ERA5 via Open-Meteo, 2016–2025 averages; the best months are computed from them, not opinion.