Climate and monthly weather forecastHamina, Finland

Climate and monthly weather forecast

The climate of Hamina

Hamina, a charming town in Finland, experiences a Humid continental type of climate, duly classified as Dfb under the Köppen climate classification. Nestled in the southern part of the country, Hamina remains susceptible to significant seasonal variation in weather.

Throughout the year, average sea temperatures swing between a frigid low of -0.5°C (31.1°F) in February, to an elevated high of 19.3°C (66.7°F) in July. On the contrary, the daylight hours show an increase from 5.9 hours per day in December to a splendid 18.9 hours per day in June. One cannot overlook this dramatic shift in daylight, showcasing the effect of Hamina's high latitude.

Terms like consistency take a back seat when examining the sea temperatures. The range from the chilliest month of February to the warmest month of July observes over a 19°C (66.2°F) difference. Daylight hours, conversely, follow a more predictable pattern, with gradual increases and decreases corresponding to the seasonal wax and wane.

Hamina holds a reputation for the clarity of its seasons, defined by distinct shifts in sea temperatures and daylight hours.

The best time to visit Hamina

June, July, and August may be considered optimal months for a visit to Hamina due to relatively warm sea temperatures, peaking at 19.3°C (66.7°F) in July. Coupled with these warm temperatures, daylight reaches its maximum at 18.9 hours per day in June. These delightful conditions allow tourists ample time and comfort to tour historical sites, relax by the lake, or even engage in a brisk swim in summer.

The worst time to visit Hamina

When the calendar turns its pages to December, January, and February, tourists may wish to reconsider their travel plans. With the sea temperature lurching at a mere -0.5°C (31.1°F) in February and daylight hours reduced to a paltry 5.9 in December, Hamina portrays the harsh Nordic winter. While some might find allure in the snow-draped charm of the town, it is best suited for those conditioned to endure severe cold.

Spring weather in Hamina

March sees the spring season manifest in Hamina, with a steady rise in sea temperatures from -0.3°C (31.5°F) to 6.8°C (44.2°F) in May. Simultaneously, daylight hours also increase noticeably, from 11.8 in March, reaching 17.3 by May. This signifies the end of protracted winters, giving way to the warmth and vibrancy synonymous with springtime.

Summer weather in Hamina

Summers grace Hamina between June and August, with sea temperatures mounting to a pleasant 18.8°C (65.8°F) in August. June becomes the town's brightest month, boasting a maximum of 18.9 daylight hours per day. Relatively warm seas paired with an abundance of daylight make summers an attractive season for outdoor activities.

Autumn weather in Hamina

Autumn creeps through Hamina from September through November, signaled by a drop in sea temperatures to 6.3°C (43.3°F) by November. Daylight hours also undergo a reduction, from 12.9 hours in September to 7.4 by November. Harbingers of winter, gritty cold seas, and limited daylight characterize the autumn months in Hamina.

Winter weather in Hamina

Hamina's winter sets in December and extends through February, with sea temperatures falling steeply to -0.5°C (31.1°F). Daylight hours dwindle down to 5.9 by December, making this season characterized by brief days and lengthy, chilly nights. Indeed, winters in Hamina are not for the faint-hearted, befitting those who embrace the bittersweet symphony of the coldest season.

Weather in January

January in Hamina, Finland is marked by its tranquility, with a predominance of clear days and frost covered landscapes. The sea temperature registers a low 0.1°C (32.2°F), making it prohibitive for outdoor water activities. Despite the biting cold, the inhabitants of Hamina cherish this month as it unfolds a unique spectacle of nature’s beauty. Weather in January »

Weather in February

The month of February brings with it a slight increase in daylight hours; however, the sea remains cold, reflecting the frigid winter conditions. This month is considered the serene winter phase with the sea temperature dipping to -0.5°C (31.1°F). Weather in February »

Weather in March

As March arrives, there are subtle signs of spring in the air. The sea temperature rises slightly to -0.3°C (31.5°F) indicating the imminent end of the winter season. The increased daylight hours are a pleasant addition, providing opportunities for extended outdoor activities. Weather in March »

Weather in April

April signifies the arrival of spring in Hamina. The sea temperature warms up to 1.3°C (34.3°F), a welcome change from the frosty conditions of the previous months. While the winter fades away, locals and tourists embrace the spring weather with joy and enthusiasm. Weather in April »

Weather in May

May witnesses the blossoming of the vibrant Finnish summer. The sea temperature soars to 6.8°C (44.2°F), inviting locals and tourists to enjoy water-based activities. The increased daylight offers ample opportunity to explore and appreciate the beauty of Hamina's lush green landscapes. Weather in May »

Weather in June

June in Hamina displays the true summer spirit, characterized by the warmest sea temperatures and the most extended exposure to sunlight. The sea temperature reaches a pleasant 13.6°C (56.5°F), ideal for swimming, and fishing. The increase in daylight hours adds extra charm to the city’s summer festivities. Weather in June »

Weather in July

July is an optimal month for taking a beach vacation in Hamina, with the sea temperature peaking to a warm 19.3°C (66.7°F). This month is replete with sunshine, warm sea tides, rock festivals, and energetic crowds. The hospitable weather creates an environment conducive for a plethora of activities, both inland and at sea. Weather in July »

Weather in August

August retains the essence of summer in Hamina. With consistently warm sea temperatures, 18.8°C (65.8°F) this month, the conditions are favorable for a variety of water sports. Despite the gradual fading of the summer sun, the landscapes remain lush and vibrant. Weather in August »

Weather in September

September welcomes the arrival of autumn in Hamina. The sea temperature cools down to 15.1°C (59.2°F) as the season transitions from summer to fall. It is the perfect month to witness the splendid fall foliage, as the city transforms into a spectacle of brilliant hues. Weather in September »

Weather in October

As October sets in, the first signs of winter become perceptible in Hamina. Although the sea temperature maintains a mild 10.1°C (50.2°F), there is a marked drop in the mercury levels. The shortened daylight hours announce the impending cold season as the city prepares to transition into the winter mode. Weather in October »

Weather in November

November marks the beginning of the winter season in Hamina. As the sea temperature drops to 6.3°C (43.3°F), the city braces itself for the wintry conditions. The days are considerably short, with chilly breezes wafting through the city. Weather in November »

Weather in December

December signifies the peak of the winter season in Hamina. The sea temperature stands at a crisp 2.9°C (37.2°F). It is a festive month, marked by the celebration of Christmas and New Year, creating a joyful atmosphere in the snow-clad city. Weather in December »

Frequently asked questions

The month with the coldest seawater is February, with an average sea temperature of -0.5°C (31.1°F).

The month with the longest days is June, with an average of 18h and 54min of daylight.

July is the month with the warmest seawater in Hamina, with an average sea temperature of 19.3°C (66.7°F).

On Sunday, 27. October 2024, at 04:00, Daylight Saving Time ends, and the time zone changes from EEST to EET. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 03:00, and the time zone reverts from EET to EEST.

The month with the shortest days is December, with an average of 5h and 54min of daylight.

Average sea temperature
Hamina, Finland

The best month for swimming (with the highest average sea temperature) is July (19.3°C).
The coldest month (with the lowest average sea temperature) is February (-0.5°C).

Average daylight
Hamina, Finland

The month with the longest days is June (Average daylight: 18h and 54min).
The month with the shortest days is December (Average daylight: 5h and 54min).