Tallinn is at its most pleasant from mid July to August. For walking, go from mid May to September. It is rarely warm enough for sunbathing.
When to go five ratings · thirty-six ten-day sections · click a cell to read it
Sun is not what Tallinn is for: the Sunbathing rating tops out at 19, mostly because it is too cool. The clearest skies come in May, when the sky is typically 39% covered at midday (partly cloudy).
For being outside, go from mid July to August. It peaks in late July, at 77. Avoid October to early May for this: it falls to 0, mostly because it is too cold.
The walking season here runs from mid May to September. It peaks in late August, at 80. The weakest stretch is from mid November to March, when it drops to 0, mostly because it is too cold.
The snow season here runs from January to February. It peaks in mid January, at 57. The weakest stretch is from mid May to September, when it drops to 0, mostly because it is too mild. Snow here is a proxy: cold enough for snow to hold, with precipitation likely. It is not measured snow depth.
The year, measured
The average temperature in Tallinn over the whole year is 7°C. July is the hottest month, with highs of about 20°C; January is the coldest, with lows of about -3°C. The rainy (wet) season in Tallinn runs from October to February, peaking in January with a 24% chance of rain on a given day. The dry season is March to July; May is the driest month, at 8%. Winds in Tallinn are highest in January, averaging 5.1 m/s (18 km/h), and lightest in August, at 4.0 m/s (14 km/h). The prevailing wind is from the SW. The clearest skies in Tallinn come in June, when the sky is typically 38% covered; December is the cloudiest month, at 84%.
Month by month Tallinn climate by month: average temperatures year round · click a month to read it
| Month | High | Low | Feels like | Chance of rain | Cloud | Wind | Being outside | Sun | Walking |
|---|---|---|---|---|---|---|---|---|---|
| January | -2°C | -3°C | -8°C | 24% | 82% | 5.1 m/s | 0 | 0 | 0 |
| February | -1°C | -2°C | -7°C | 23% | 76% | 5.0 m/s | 0 | 0 | 0 |
| March | 2°C | -1°C | -4°C | 14% | 62% | 4.7 m/s | 0 | 0 | 2 |
| April | 7°C | 2°C | 1°C | 15% | 50% | 4.6 m/s | 2 | 0 | 18 |
| May | 13°C | 8°C | 8°C | 8% | 38% | 4.2 m/s | 18 | 1 | 57 |
| June | 18°C | 14°C | 15°C | 13% | 38% | 4.2 m/s | 49 | 6 | 73 |
| July | 20°C | 16°C | 18°C | 13% | 44% | 4.1 m/s | 66 | 12 | 70 |
| August | 19°C | 15°C | 17°C | 17% | 48% | 4.0 m/s | 68 | 6 | 77 |
| September | 15°C | 11°C | 12°C | 13% | 54% | 4.2 m/s | 31 | 1 | 75 |
| October | 9°C | 6°C | 4°C | 18% | 69% | 5.0 m/s | 1 | 0 | 32 |
| November | 4°C | 3°C | -2°C | 20% | 83% | 5.0 m/s | 0 | 0 | 6 |
| December | -0°C | -1°C | -6°C | 21% | 84% | 5.0 m/s | 0 | 0 | 0 |
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Tallinn weather by season
Year round, Tallinn has days of about -2°C at their warmest in January, its coolest month, and 20°C in July, its warmest; the coolest hours of the day run from -3°C to 16°C through the year, and the average temperature over the year is 7°C around the clock. Rain is most likely around January and least likely around May. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Tallinn weather in winterDecember to February
Winter in Tallinn has typical daily highs of about -1°C and lows of about -2°C, with a 23% chance of rain on a given day.
Tallinn weather in springMarch to May
Spring in Tallinn has typical daily highs of about 7°C and lows of about 3°C, with a 13% chance of rain on a given day.
Tallinn weather in summerJune to August
Summer in Tallinn has typical daily highs of about 19°C and lows of about 15°C, with a 14% chance of rain on a given day.
Tallinn weather in autumnSeptember to November
Autumn in Tallinn has typical daily highs of about 9°C and lows of about 7°C, with a 17% chance of rain on a given day.
When is the rainy season in Tallinn?
The rainy (wet) season in Tallinn runs from October to February, peaking in January with a 24% chance of rain on a given day. The dry season is March to July; May is the driest month, at 8%.
What time of year is Tallinn windiest?
Winds in Tallinn are highest in January, averaging 5.1 m/s (18 km/h), and lightest in August, at 4.0 m/s (14 km/h). The prevailing wind is from the SW.
What is the average temperature in Tallinn year round?
The average temperature in Tallinn over the whole year is 7°C. July is the hottest month, with highs of about 20°C; January is the coldest, with lows of about -3°C.
Where to go instead in early January, the weakest time here for being outside
How this is worked out
Every figure is a decade of weather-station observations blended into one typical year, in ten-day sections. The ratings, the chart and the feels-like column are read at midday local solar time. Being outside is the Easy outdoors rating, Sun is Sunbathing and Walking is Active outdoors, each out of 100: Good from 55, Ideal from 80. They describe what a time of year is usually like here, not a forecast. The dotted links open the map at that time of year; set its time of day to midday to see these numbers.