May Weather in Hamina, Finland

Last updated: August 21, 2025

May in Hamina, Finland, brings a delightful blend of spring warmth and brisk coolness. With maximum temperatures reaching a pleasant 26°C (79°F) and an average of 10°C (50°F), residents and visitors can enjoy the emergence of vibrant greenery. However, the month starts with cooler nights, dipping to a minimum of -3°C (27°F). Rainfall is moderate, with 49 mm (1.9 in) spread across 9 days, contributing to the lush landscapes, while humidity hovers around 75%, creating a refreshing atmosphere. Overall, May offers a beautiful transition into summer, perfect for outdoor activities and exploration.

May Temperature in Hamina

In Hamina, Finland, May marks a delightful transition into warmer weather, showcasing a dramatic rise in temperatures that contrasts sharply with the frigid winter months. With minimum temperatures averaging around -3°C (27°F) and peaking at a pleasant 26°C (79°F), the average temperature settles at a comfortable 10°C (50°F). This significant shift from April, when conditions were still quite chilly—with lows of -12°C (10°F)—indicates that spring is in full swing. The month not only invites the blossoming of nature but also the return of outdoor activities as residents and visitors alike bask in the mild sunshine. The gradual warming trend from the icy depths of winter to the mild embrace of spring serves as a reminder of Finland's unique seasonal beauty.

May Weather in Hamina: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Hamina, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hamina, May typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec272529385061646254453730
Data source: Temperature data for Hamina generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Hamina

In Hamina, Finland, May typically brings a refreshing 49 mm (1.9 in) of precipitation, continuing a trend of moderate rainfall observed in the preceding months. With an average of just 9 rainy days, the month marks a slight decrease in precipitation compared to earlier spring months like April, which recorded 43 mm. This pattern suggests that while the onset of summer approaches, the weather remains capricious yet manageable. As temperatures rise, the rainfall level in May contributes to the lush landscapes that define the region, hinting at the abundant growth that follows in the summer months ahead.

May Precipitation Trends in Hamina

The chart displays monthly precipitation patterns in Hamina, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Hamina, May typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec555650434948829067846582
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Hamina

May marks a notable shift in humidity levels in Hamina, Finland, with the levels dropping to 75%, offering a breath of fresh air compared to the winter months. As the year progresses, there’s a distinct trend of decreasing humidity from January’s 98% down to May's more moderate figures, indicating a transition into the warmer months. This decline continues into June, where humidity stabilizes at 74%, although it begins to rise again in July as summer unfolds. The overall pattern suggests that right before the peak of summer, May provides a pleasant balance, making it an ideal time to enjoy the outdoors in Hamina before the humidity rises again later in the season.

May Average Humidity in Hamina

This chart illustrates the average monthly humidity levels in Hamina, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Hamina is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec98%96%93%87%75%74%80%85%90%94%94%96%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Hamina

In May, Hamina, Finland experiences a notable increase in UV exposure with a UV Index of 5, marking a transition to the moderate category. This signifies a shift from the low levels observed during the winter months, with January and February both at a steady 1. As spring progresses, the UV Index rises from 3 in March to 4 in April, culminating in May's 30-minute burn time, a reminder to practice sun safety. This upward trend continues into the summer, with higher levels expected in June and July. For details on the UV Index throughout the year, explore Hamina UV Index.

Maximum UV Index Levels in Hamina for May

The chart shows the monthly maximum UV Index (UVI) for Hamina in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In May, the maximum UV index in Hamina typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec113457754211
Data source: Hamina May UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

May Sunshine in Hamina

As May unfolds in Hamina, Finland, the transition to summer becomes evident, with an impressive 451 hours of sunshine gracing the month. This surge reflects a remarkable increase from the previous months, where sunshine hours jump from 365 in April to an impressive 451 in May. The trend is in stark contrast to the sun-deprived winter months, which struggle to exceed 132 hours in February. As daylight stretches and temperatures warm, the vibrant landscape is illuminated, inviting residents and visitors alike to bask in the expanding sunlight that continues to intensify into June. The month of May stands as a vivid reminder of nature’s revival, ushering in longer days and brighter moments.

Monthly Sunshine Duration in Hamina: May Highlighted

The May sunshine duration represents the total number of hours Hamina experiences direct sunlight during the month of May, excluding cloudy or obstructed periods. This chart compares the sunshine duration of May with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec45h132h258h365h451h488h490h411h296h201h107h44h
Data source: Hamina May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Hamina During May

As spring blossoms into May in Hamina, Finland, the chances of experiencing sunny weather are notably higher than in the preceding months, although they dip to 30%. This reflects a common trend where April, often characterized by an awakening warmth, primes the atmosphere for sunnier days ahead. While the odds of sunshine are more favorable in the summer months of June and July, which boast 55% and 59% chances respectively, May serves as a transitional phase, balancing between a cool spring and the vibrant warmth of early summer. Thus, while you're likely to catch some rays, don't forget to prepare for the unpredictability that May can bring!

Percentage of Sunny Days in May in Hamina

The chart illustrates the percentage of sunny days in Hamina throughout the year, with May highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Hamina experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec4%12%37%45%30%55%59%29%23%22%15%9%
Data source: Hamina May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Hamina in May

As spring unfolds in Hamina, Finland, May heralds a delightful transition with 17 hours of daylight, bringing a noticeable increase in brightness and warmth. This month marks a significant leap from the 14 hours of daylight in April, sparking a vibrant atmosphere as nature comes alive. Following the longer days of May, the daylight reaches its peak in June with 18 hours, before gradually tapering off in the summer months. The progression of daylight duration from the stark 6 hours in January to the lush evenings of May illustrates a compelling narrative of renewal and growth. As the days lengthen, residents embrace outdoor activities, making the most of the abundant sunshine that lingers well into the evening.

Average Daylight Hours in Hamina for May

The chart illustrates the variation in daylight duration in Hamina throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec6h 39m9h 4m11h 51m14h 41m17h 20m18h 54m18h 3m15h 35m12h 48m10h7h 22m5h 49m
Data source: Hamina daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Hamina

In Hamina, Finland, May heralds a gentle breeze with an average wind speed of 3.8 m/s (8 mph), making it a pleasant month compared to the preceding spring. Despite being less windy than March and April, May maintains a comfortable flow, hinting at the calmer conditions of early summer. Interestingly, the month marks a transition as winds begin to pick up again in August, reaching 4.7 m/s (10 mph), suggesting that while May enjoys relative calm, the forthcoming months will reintroduce livelier gusts. This pattern reflects the shifting dynamics of the seasons, with May nestled in a sweet spot between the robust winds of spring and the invigorating breezes of late summer.

Average May Wind Speed in Hamina

The chart displays monthly wind speed patterns in Hamina, with values for each month shown alongside May's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how May's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec4.13.64.54.23.8 m/s3.23.64.74.25.64.94.6
Data source: Hamina May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Hamina Compares to Other Months

Weather in Hamina varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Hamina, focusing on differences in temperature, rainfall, humidity, and UV levels.

May and January present strikingly contrasting weather conditions. In May, temperatures range from a chilly -3°C (27°F) to a pleasant 26°C (79°F), with an average of 10°C (50°F). The month brings moderate precipitation of 49 mm (1.9 in) over approximately 9 days, and humidity levels hover around 75%. In contrast, January is much colder, with temperatures dipping as low as -24°C (-10°F) and averaging -3°C (27°F), peaking at just 7°C (46°F). This month experiences slightly higher precipitation at 55 mm (2.2 in), occurring over about 12 days, accompanied by a strikingly high humidity level of 98%. For more detailed insights, you can visit Hamina weather in January.

May and February present a stark contrast in weather. In May, temperatures range from a chilly -3°C (27°F) at night to a pleasant average of 10°C (50°F) during the day, with peak highs reaching up to 26°C (79°F). While precipitation is relatively moderate at 49 mm (1.9 in) over about 9 days, humidity settles at 75%, making the air feel fresh and invigorating.

In contrast, February is much colder, with temperatures plummeting to a minimum of -28°C (-18°F) and an average of -4°C (25°F), topping out at only 7°C (44°F). The month sees slightly more precipitation at 56 mm (2.2 in) spread across 11 days, accompanied by a higher humidity of 96%, contributing to the frigid feel of the winter air. For more specific details, you can visit Hamina weather in February.

March and May present stark contrasts in weather conditions. In March, temperatures are much colder, with minimums plunging to -22°C (-7°F) and an average of -1°C (30°F), making it a chillier month overall. The precipitation is slightly higher at 50 mm (2.0 in), occurring over 11 days, and the humidity is notably high at 93%, contributing to a damp, wintry atmosphere. In contrast, May sees a significant warming trend, with minimum temperatures rising to -3°C (27°F) and a pleasant average of 10°C (50°F), peaking at a comfortable 26°C (79°F). While May experiences a total precipitation of 49 mm (1.9 in) over 9 days, the lower humidity of 75% enhances the feeling of warmth and spring. For a detailed look at March weather, you can visit Hamina weather in March.

In comparing the weather between April and May, April tends to be colder with a minimum temperature of -12°C (10°F) and an average of just 4°C (39°F), while May enjoys a milder climate with temperatures ranging from a minimum of -3°C (27°F) to an average of 10°C (50°F). Although April has slightly less precipitation at 43 mm (1.7 in) over 10 days, it experiences higher humidity at 87% compared to May's 75%. May brings warmer days, with maximum temperatures reaching up to 26°C (79°F), making it a much more pleasant month overall. For a closer look at April’s weather specifics, you can check Hamina weather in April.

May and June present a notable transition in weather conditions. In May, temperatures range from a chilly minimum of -3°C (27°F) to a comfortable average of 10°C (50°F), reaching up to a maximum of 26°C (79°F). The month sees around 49 mm (1.9 in) of precipitation over approximately 9 days, with humidity levels hovering at 75%. In contrast, June brings warmer weather, with temperatures ranging from a minimum of 2°C (35°F) to an average of 16°C (61°F) and peaking at 30°C (87°F). Precipitation remains similar, at 48 mm (1.9 in) but occurs over 10 days, with slightly lower humidity at 74%. For more detailed insights, you can check Hamina weather in June.

In May, temperatures range from a chilly minimum of -3°C (27°F) to a pleasant maximum of 26°C (79°F), with an average of 10°C (50°F). The month receives about 49 mm (1.9 in) of precipitation over approximately 9 days, accompanied by a humidity level of 75%. In contrast, July experiences warmer weather, with minimum temperatures around 8°C (46°F), average temperatures reaching 18°C (65°F), and highs peaking at 31°C (88°F). Precipitation increases to 82 mm (3.2 in) over about 11 days, and the humidity rises slightly to 80%. For more specific details about July weather, you can visit Hamina weather in July.

May and August exhibit significant differences in weather patterns. In May, temperatures range from a chilly minimum of -3°C (27°F) to a pleasant average of 10°C (50°F), peaking at 26°C (79°F). The month sees a moderate amount of precipitation at 49 mm (1.9 in) over about 9 days, accompanied by a humidity level of 75%.

In contrast, August brings warmer conditions, with temperatures typically ranging from a minimum of 7°C (45°F) to an average of 17°C (62°F) and a maximum of 30°C (87°F). However, it also experiences more rainfall, totaling 90 mm (3.5 in) spread across approximately 13 days and higher humidity at 85%. For more details, you can check Hamina weather in August.

May and September exhibit distinct weather characteristics. In May, temperatures range from a chilly -3°C (27°F) at night to a warm 26°C (79°F) during the day, with an average temperature of 10°C (50°F). This month typically sees around 49 mm (1.9 in) of precipitation over approximately 9 days, accompanied by a humidity level of 75%, making it a refreshing springtime month.

In contrast, September experiences slightly milder temperatures, with a minimum of 0°C (32°F) and a maximum of 22°C (73°F), averaging around 12°C (54°F). However, it is wetter, with 67 mm (2.6 in) of rain spread over 12 days and a higher humidity of 90%. This shift signals the transition into autumn. For more specific details on weather patterns, you can visit Hamina weather in September.

May and October show distinct differences in weather patterns. In May, temperatures range from a chilly -3°C (27°F) at the minimum to a pleasant 26°C (79°F) at the maximum, with an average of 10°C (50°F). This month experiences about 49 mm (1.9 in) of precipitation over 9 days, while humidity is relatively comfortable at 75%. In contrast, October sees cooler temperatures, with a minimum of -4°C (26°F), an average of 7°C (45°F), and a maximum of 16°C (62°F). The month is also wetter, accumulating 84 mm (3.3 in) of precipitation across 16 days and higher humidity at 94%. For more detailed information on October weather, you can visit Hamina weather in October.

May and November present contrasting weather patterns. In May, temperatures range from a chilly -3°C (27°F) at night to a pleasant 26°C (79°F) during the day, with an average of 10°C (50°F). Although May sees about 49 mm (1.9 in) of precipitation over roughly 9 days, the overall humidity is more moderate at 75%. In stark contrast, November plunges to colder temperatures, with a minimum of -8°C (18°F) and a maximum of only 12°C (54°F), averaging just 3°C (38°F). The month also experiences higher rainfall, totaling 65 mm (2.6 in) across 14 days, combined with a much higher humidity level at 94%. For more details, check out Hamina weather in November.

May and December present starkly contrasting weather conditions. In May, temperatures can range from a chilly -3°C (27°F) at night to a pleasant 26°C (79°F) during the day, with an average of around 10°C (50°F). The month experiences moderate precipitation, totaling 49 mm (1.9 in) over about 9 days, and is characterized by a humidity level of 75%. In contrast, December brings much colder weather, with nighttime lows dipping to -18°C (0°F) and daytime highs reaching only 6°C (44°F), resulting in an average temperature of -1°C (30°F). This winter month sees more precipitation, accumulating 82 mm (3.2 in) across 16 days, and a high humidity level of 96%. For more detailed information, check out Hamina weather in December.

Compare Hamina's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Hamina

As May unfolds in Hamina, it heralds the transition from the grip of winter to the warmth of summer, bringing a noticeable increase in temperatures and a shift in climate. Unlike the colder months, where frigid conditions reign, May showcases a more mild atmosphere, with the mercury reaching delightful highs that invite outdoor activities. While precipitation remains a common occurrence with a handful of rainy days, the overall humidity crispness adds to the refreshing springtime vibe. This month marks a significant departure from the chill, allowing residents and visitors alike to embrace the beauty of nature awakening in Finland. For a deeper dive into the weather patterns throughout the year, explore Hamina Climate.