Climate and monthly weather forecast
Espoo, Finland

Espoo, positioned in southern Finland, exhibits the climatic characteristics associated with the Dfb category of the Köppen climate classification. This indicates a humid continental climate, with no discernible dry season and warm summers. Weather throughout the year is subject to these conditions, manifesting significant seasonal variations.

Monthly average sea temperatures fluctuate anywhere from 0.1°C (32.2°F) in March to 18.7°C (65.7°F) in August. Daylight hours also present considerable variations, with December seeing a mere 6 hours per day, stretching to 18.8 average hours in June. This gives Espoo significant seasonal differences in daylight, heightening the contrast between summer and winter months.

Rainfall sustains throughout the year, creating a comparatively damp environment devoid of any particular dry season. Any peaks in rainfall, though, sway towards the minimal side, with slight highs noticeable during select months rather than a pronounced rainy season. The continental nature of Espoo's climate ensures decidedly cold winters and warm, though not excessively hot, summers.

Visitors aiming for warmer temperatures and optimal daylight hours should aim for visits between May to August. During these months, average sea temperatures ascend from 6.8°C (44.2°F) to the peak of 18.7°C (65.7°F), and daylight extends from 14.6 hours to a generous 18.8 hours in June. The presence of consistent rainfall can lend a touch of cool respite during these warmer months.

Espoo's climate dips to substantial lows between January to March. Sea temperatures during these months languish between 0.2°C (32.4°F) to 1.6°C (34.9°F), and daylight hours contract to between 6.8 hours in January to 11.8 hours by March's end. The persistent rainfall, coupled with the biting cold, makes for adverse weather conditions, potentially hampering outdoor exploration during these months.

March to May in Espoo witnesses a gradual transition from the biting cold of winter to a comparatively warmer spring. Sea temperature moves incrementally from 0.1°C (32.2°F) in March to 6.8°C (44.2°F) in May. Average daylight hours also see a steady increase, moving from 11.8 hours to 17.2 hours during the same period. The persistent yet gentle rainfall provides a refreshing counterpoint to the increasing warmth.

Summer extends from June to August in Espoo. Maximum sea temperatures are noted during these months, with a rise from 13.2°C (55.8°F) in June to a peak of 18.7°C (65.7°F) in August. The days extend considerably, from 18.8 hours in June, slightly declining to 18 hours in August, promoting longer exploration hours. Rainfall remains consistent, keeping the summer from turning uncomfortably scorching.

Autumn months of September to November in Espoo bring a steady decline in both sea temperature and daylight hours. Sea temperatures drop from 15.4°C (59.7°F) in September to 4°C (39.2°F) in November, whereas daylight hours decrease from 12.9 hours to 7.5 hours during the same period. The persistent rainfall, combined with the gradually dipping temperatures, fosters a cool, damp environment typical of a Nordic autumn.

Espoo endures its coldest temperatures from December to February. Average sea temperatures descend to their lowest, hitting 0.9°C (33.6°F) in December, and maintain low temperatures from 0.2°C (32.4°F) to 1.6°C (34.9°F) through till February. Average daylight hours dwindle to their shortest, from 6 hours in December to 6.8 hours in February. The constant rainfall, paired with these low temperatures, sets the stage for a dark, damp, yet atmospherically unique, Nordic winter.

January in Espoo, Finland presents a frigid scene, with sea temperatures dipping to their lowest at 0.9°C (33.6°F). This noticeably cooler period follows the slightly warmer December weather, and paves the way for an even colder February. Weather in January »

February continues the trend of cold weather in Espoo, Finland, further intensifying the chill experienced in January. Though the sea continues to remain cold, it is not vastly different from the temperatures in the preceding month. Weather in February »

March in Espoo, Finland marks a transition from Finland's coldest weather, with an evident change from the harsh conditions of February. Although the temperatures are still on the lower side compared to the remainder of the year, warmth starts to seep slowly into the city. Weather in March »

In April, Espoo, Finland's weather takes a notable turn towards warmer days, sharply contrasting with the chilly conditions observed in March. The sea becomes less cold, indicating the steady shift towards mild temperatures. Flowers begin to bloom, marking a visible change in the city's landscapes, and the extended daylight perks up daily routines and outdoor activity intensity. In April, the average sea temperature is 1.6°C (34.9°F). Note: Under swimming conditions, this represents an immediate threat to life. Weather in April »

May witnesses a rapid warm-up in Espoo, Finland, showing substantial temperature differences from April. Sea temperatures get a bump up to 6.8°C (44.2°F), a clear indication of warming weather and the onset of the pleasant Finnish summer. Weather in May »

June ushers in the peak of summer in Espoo, Finland, characterized by warmer weather and a substantial increase in daylight hours when compared to May. The abundance of sunlight leads to a steady rise in temperatures, and it's common to see locals and tourists taking to the outdoors. Weather in June »

July is the warmest month in Espoo, Finland, with temperatures reaching 18.4°C (65.1°F) in the sea, showing a noticeable upward trend from June. The city basks under the sun, creating ideal conditions for water-based activities and travel. Weather in July »

In August, Espoo, Finland's summer weather slowly starts to wind down, with temperatures falling from the highs experienced in July. Although it remains comfortably warm, signs of the approaching autumn become evident. The Finnish city starts to display early signs of the autumn landscape, marking the gradual transition in the season. Weather in August »

September sees Espoo, Finland making a full swing towards autumn, with weather conditions cooling down from August. The sea temperatures drop to 15.4°C (59.7°F), signalling the transition towards the approaching cooler months. Weather in September »

October brings a substantial drop in temperatures in Espoo, Finland, paving the way for incoming winter. The transition from September's gentle cool to October's clear chill is noticeable. Cozy sweaters make their appearance as locals and visitors adjust to the falling temperatures. Weather in October »

November in Espoo, Finland sees the city bracing itself for winter, as temperatures continue to fall following October. The last traces of autumn disappear as the city prepares for the coming winter chill. The daylight hours shorten dramatically, creating a prelude to the long, dark winter evenings. Weather in November »

December in Espoo, Finland welcomes the peak of winter, with sea temperatures hitting a low of 4°C (39.2°F) contrasting sharply with November's end. Snow starts to fall, transforming Espoo into a lovely winter wonderland just in time for the holiday season. Weather in December »