Climate and monthly weather forecast
Tallinn, Estonia

Tallinn, the mesmerizing capital of Estonia, is located in the Northern part of the country, on the shores of the Baltic Sea. Its climate is predominantly classified as Dfb, or Humid Continental, as per the Köppen Climate Classification. This indicates no dry period during the year and suggests that summers can be warm.

Temperature highs fluctuate from -1.2°C (29.8°F) in January to a comfortable 21.8°C (71.2°F) in July, marking the warmest month of the year. On the contrary, lows can be chilling as temperatures decline from -5.8°C (21.6°F) in January to reach the lowest point at -7°C (19.4°F) in February, before gradually escalating up to 12.7°C (54.9°F) by July. Monthly average temperatures in Tallinn significantly moderates as it moves from negative degrees in winter towards relatively calmer ones during summer.

Rainfall is distributed evenly throughout the year with an average precipitation varying from 30mm (1.18") in April to 74mm (2.91") in July. August also observes a similar high with 73mm (2.87") of rainfall. The number of rainfall days also increases in synchronization, reaching a peak with 16 days in both September and October.

Relative humidity averages around 75%, rising prominently from 69% in May to 88% in both January and December. Snowfall is a frequent occurrence in winter months with January seeing 14 snowfall days, and December closely following with 11 days.

Daylight hours are at a premium during winter, reaching a low of 6.2 hours in December which increases gradually to a summertime high of 18.5 hours in June. Correspondingly, the hours of sunshine vary from a scanty 0.5 hours in December to a generous 10.1 hours in June.

The best time to visit Tallinn

Considering the climatological parameters, the ideal time to visit Tallinn would be from June to August. During this period, the city experiences relative warmth with temperature highs oscillating from 18.8°C (65.8°F) to 21.8°C (71.2°F) and lows from 9.6°C (49.3°F) to 12.7°C (54.9°F). These months also correspond to the longest daylight durations with around 18 hours, providing ample opportunities for sightseeing and exploration. The pleasant sea temperatures ranging between 13.7°C (56.7°F) and 19.1°C (66.4°F) add to the allure of the season.

The worst time to visit Tallinn

Venturing to Tallinn between December to February would demand fortitude. The temperature highs plunge to as low as -1.6°C (29.1°F) in February and the lows plummet to a freezing -7°C (19.4°F), making it the coldest month in Tallinn. Coupled with the scant daylight hours, 6.2 in December to give an instance, the conditions can be quite gloomy. The snowfall days also see a major hike, particularly in January when it clocks 14 days.

Spring weather in Tallinn

Characterized by a gradual warming trend, spring emerges in Tallinn from March to May. March begins with a high of 2.3°C (36.1°F) and a low of -4.2°C (24.4°F). By May, temperatures warm up noticeably, with highs of 15.2°C (59.4°F) and lows of 5.2°C (41.4°F). Rainfall in April touches a yearly low of 30mm (1.18"), however, the number of rainfall days in May climbs to 11. Sunshine hours also see a gradual increase, while the UV index climbs from 1 in March to 4 in May.

Summer weather in Tallinn

Summertime in Tallinn occurs from June through August. These months typically maintain a pleasant warmth without being excessively hot. With highs ranging only from 18.8°C (65.8°F) in June to 21.8°C (71.2°F) in July and lows from 9.6°C (49.3°F) to 12.7°C (54.9°F) in the same period, the weather is indeed inviting. Despite the occasional showers with rainfall peaking at 74mm (2.91") in July, the city experiences the longest sunshine hours during this season.

Autumn weather in Tallinn[/h2>

Autumn is from September to November and signals the onset of cooler weather. Temperature highs swiftly decline from a moderate 15.2°C (59.4°F) in September to a chilly 3.4°C (38.1°F) by November, while lows similarly plunge from 7.8°C (46°F) to a colder -0.8°C (30.6°F). Rainfall continues to be significant in autumn, with 60mm (2.36") in September easing to 49mm (1.93") by November.

Winter weather in Tallinn[/h2>

Winter in Tallinn usually lasts from December to February. It makes its presence felt through biting cold with January and February recording temperature highs of -1.2°C (29.8°F) and -1.6°C (29.1°F) respectively and lows of -5.8°C (21.6°F) and -7°C (19.4°F) respectively. Snowfall is a predominant feature during this season, reaching its climax in January with 14 days of snow. Hours of daylight reduce drastically to as low as 6.2 in December, contributing to the overall solemn nature of the season.

Tallinn's year kicks off with the chilly grip of winter at its strongest. The first month experiences extreme freezing temperatures, plunging to as low as -5.8°C (21.6°F) during the night. January is one of those months where you can admire the city's gothic spires clad in snow, due to heavy snowfall. Weather in January »

If you think January was the coldest, wait until you experience February's weather in Tallinn! The freezing night temperatures reach an average low of -7°C (19.4°F), the coldest of the year. However, an interesting change is the gradual lengthening of the daylight period by around 2 hours compared to January. Weather in February »

March heralds the advent of spring in Tallinn, but winter's traces persist. The temperatures become slightly more bearable, rising to a high of 2.3°C (36.1°F) during daylight hours. Daytime gets longer, adding about 2.6 hours of sunshine compared to February. Weather in March »

As Tallinn proceeds into spring, the weather in April warms considerably. The average high temperature sees a significant leap from March, reaching up to 9.2°C (48.6°F). It is an appreciable shift towards more pleasant weather conditions. Weather in April »

May brings one of the best times to visit Tallinn, with weather conditions that many find agreeable. The temperature takes a pleasant turn, with highs averaging around 15.2°C (59.4°F). It's an ideal time to wander the cobbled streets of Tallin's Old Town or enjoy outdoor activities without the threat of rainfall or cold. Weather in May »

The arrival of June coincides with the start of the summer season in Tallinn. Tallinn's weather provides an opportunity to experience the famed "White Nights," as daylight prolongs to an abundant 18.5 hours. The city warms up comfortably, sometimes even warranting a swim in the sea. Weather in June »

The warmth of mid-summer comes to fruition in July. It is typically the warmest month in Tallinn, with the average highest temperatures scaling up to 21.8°C (71.2°F). The extended daylight continues, ensuring long and bright days. Weather in July »

As the last full summer month, August experiences slightly cooler temperatures than July. The heatwave from July subsides but maintains a comfortable warmth throughout the city. Rainfall measures close to previous month's level while daylight begins its decline towards autumn. Weather in August »

In September, the tell-tale signs of the upcoming autumn season start to become apparent. As the leaves begin to change their hues, a chilly undercurrent threads through Tallinn's weather. Despite the noticeable decline in temperatures compared to August, September remains a favoured time for sightseeing and outdoor activities. Weather in September »

October brings a distinct autumn chill to Tallinn, setting the stage for the winter season. The average temperature takes a downturn, typical of the fall season. As the daylight hours dwindle, the city puts on a grand display of autumn colours before winter's arrival. Weather in October »

November's weather in Tallinn is a progression towards the colder end of the year. Winter begins its stranglehold on the city, with temperatures dropping significantly compared to October. The climate leans to the cold side, often with a subtle sting of winter's forthcoming chills. Weather in November »

December wraps up the year in Tallinn with the traditional winter charm. Temperatures hover around the freezing point, with an average low of -4.2°C (24.4°F). The city lights up with festive décor as snowfall rounds off the classic winter scene. Weather in December »