Last updated: August 21, 2025
In January, Naantali, Finland experiences a unique winter climate characterized by variable temperatures, with maximums reaching 8°C (47°F) and plunging to a chilling minimum of -21°C (-6°F). The average temperature hovers around -2°C (29°F), creating a crisp atmosphere. During this month, residents can expect approximately 48 mm (1.9 in) of precipitation over 9 days, contributing to the region's high humidity, which stands at an impressive 92%. This blend of colder weather and moisture creates a stunning, frosty landscape, making January a captivating time to witness Naantali's winter charm.
In Naantali, Finland, January brings a crisp chill that sets the tone for the winter, with temperatures ranging from a biting -21°C (-6°F) to a relatively milder 8°C (47°F). The average temperature settles at a frosty -2°C (29°F), signifying the deep cold typical of mid-winter. As the month progresses into February, the temperatures maintain a similar trend, with slightly warmer averages and highs of 7°C (44°F), hinting at the gradual shift towards spring. Notably, January stands out as one of the coldest months, where the biting winds and icy landscapes create a quintessential winter wonderland that celebrates Finland's serene beauty. As days lengthen and temperatures subtly rise, a gentle transition from the depths of winter begins, offering a glimpse of the warmth to come.
In Naantali, Finland, January ushers in a moderate level of precipitation, with 48 mm (1.9 in) accumulating over 9 days. This marks a slight increase compared to February's 42 mm, indicating a trend toward wetter conditions as winter settles in. The precipitation consistently stays within the range of 40-50 mm during the early months of the year, providing a steady but manageable flow of moisture. As spring approaches, the total amount begins to dip, but the frequency of wet days remains stable. Comparing January to the summer months reveals a stark contrast; July and August experience much higher totals of 75 mm (3.0 in) and 87 mm (3.4 in), respectively, suggesting that Naantali experiences a significant uptick in rainfall during the warmer season. Overall, January marks a solid beginning to the year, balancing rainfall and snow in a way that prepares the landscape for the seasons to come.
In January, Naantali experiences a notable humidity level of 92%, setting the tone for a winter characterized by palpable moisture in the air. This high humidity gently tapers off to 90% in February and further declines to 89% in March. As spring approaches, the humidity continues on a downward trend, reaching 85% in April and dropping to 77% by May—the lowest of the year. Interestingly, as summer unfolds, humidity levels stabilize around 78% for June and July, before rising slightly to 79% in August. The transition into autumn sees a rebound, with humidity creeping back up to 86% in September and fluctuating between 90% and 89% from October through December. This pattern reflects the region's distinctive seasonal shifts, marked by a humid winter that concedes to drier air in spring and summer, only to regain moisture in the fall and winter months.
In January, Naantali enjoys a low UV Index of 1, with a burn time of approximately 45 minutes, making it an ideal time for outdoor activities without much risk of sunburn. This trend of minimal UV exposure continues into February, where the UV Index remains the same. However, as spring approaches, the UV Index begins to climb. March sees a moderate increase to 3, reducing burn time to 30 minutes, which signals the need for a bit more sun protection. The index peaks in the summer months, reaching 7 in both June and July, where outdoor enthusiasts should be particularly mindful with a reduced burn time of just 25 minutes. As the year progresses, the UV Index gradually decreases, returning to low levels by November with a consistent 1. For more detailed insights on UV levels year-round, visit Naantali UV Index.
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In Naantali, Finland, the January sunshine brings a modest 63 hours of daylight, a gentle precursor to the brightening days ahead. As winter begins to wane, February sees a remarkable increase to 158 hours, hinting at the promise of spring. By March, sunlight blossoms to 278 hours, with light cascading down upon the snowy landscapes. April continues this upward trend, boasting 374 hours, as the beauty of awakening nature become more evident. The peak arrives in the summer months, with June offering a dazzling 494 hours, before gently tapering off through the latter half of the year. This seasonal rhythm highlights the contrast between stark winter and vibrant summer in Naantali, inviting all to bask in the fleeting brightness of each month.
In Naantali, Finland, January brings a mere 10% chance of sunny weather, marking the month as one of the cloudiest in the year. This trend toward limited sunlight begins a gradual ascent as winter transitions into spring, with February seeing a slight increase to 27%. As the days lengthen and temperatures rise, the likelihood of sunny skies steadily improves, reaching 37% in March and peaking at 52% by April. This pattern not only highlights the stark contrast between the dark winter months and the brighter spring ahead but also sets the stage for the eventual arrival of summer, where sunny probabilities soar to 56% in June and 57% in July. Thus, while January may be dim and dreary, the promise of sunnier days is just around the corner.
In Naantali, Finland, January marks the beginning of the year with only 6 hours of daylight, a stark contrast to the bright months ahead. As winter loosens its grip, February brings a small but significant increase to 9 hours, hinting at the longer days to come. By March, daylight expands to 11 hours, gradually building momentum towards the sunnier seasons. The transformation is most pronounced in April, as daylight stretches to 14 hours, and by May, it peaks at 17 hours, bathing the landscape in vibrant sunlight. June and July maintain this sunny delight with a maximum of 18 hours, offering the essence of summer. However, the gradual retreat begins in August with 15 hours, gently signaling the approach of autumn. As September rolls in, daylight dips to 12 hours, followed by a steady decline through October and November, ultimately returning to 7 hours in November and a mere 5 hours in December. This rhythmic dance of daylight not only characterizes the passage of time but also profoundly shapes the lifestyle and seasonal activities in Naantali.
In Naantali during January, the average wind speed hovers at a brisk 3.9 m/s (9 mph), setting the tone for a winter that dances with the chill of the season. This slight breeze is a precursor to the slightly lower winds in February, which dip to 3.7 m/s (8 mph). As winter transitions into spring, March brings a noticeable uptick, with winds picking up to 4.5 m/s (10 mph), invigorating the landscape with the promise of warmer days. April and May see a gentle ebb again, while summer months like June and July experience the calmest breezes, averaging around 3.3 to 3.5 m/s (7 to 8 mph). But as the seasons shift back toward autumn, October surprises with a sharper gust, rising to 5.3 m/s (12 mph). Overall, the trend reveals a rhythmic cycle of wind speeds, with January and February embodying a tranquil start, culminating in the invigorating breezes of March and the dynamic shifts of fall.
Weather in Naantali varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Naantali, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparison to January, February offers slightly milder temperatures, with average highs reaching 7°C (44°F) compared to January's peak of 8°C (47°F). Both months experience chilly lows, with January averaging -21°C (-6°F) and February averaging -20°C (-4°F). Precipitation is somewhat lower in February at 42 mm (1.7 in) over 8 days, compared to January's 48 mm (1.9 in) over 9 days. Humidity remains quite high in both months, at 92% in January and slightly less at 90% in February. For more detailed information, you can check Naantali weather in February.
In January, the weather is notably cold, with temperatures ranging from a minimum of -21°C (-6°F) to a maximum of 8°C (47°F), resulting in an average of -2°C (29°F). The month sees around 48 mm (1.9 in) of precipitation over 9 days, accompanied by high humidity levels at 92%. In contrast, March experiences slightly milder temperatures, with an average of 0°C (32°F), ranging from a low of -23°C (-9°F) to a high of 11°C (52°F). Precipitation remains similar at 44 mm (1.7 in) over 9 days, but humidity decreases slightly to 89%. For more detailed insights about the weather, you can check Naantali weather in March.
January and April demonstrate a notable contrast in weather conditions. In January, temperatures can plunge as low as -21°C (-6°F), with an average temperature of -2°C (29°F) and maximums reaching only 8°C (47°F). The month is characterized by high humidity at 92% and frequent precipitation, totaling 48 mm over 9 days. In contrast, April brings a significant rise in temperatures, with a minimum of -9°C (16°F) and an average of 4°C (39°F), peaking at a pleasant 21°C (70°F). Although precipitation occurs on the same number of days (9), it is less intense, at 32 mm, and humidity decreases slightly to 85%. For further details on April weather, you can check Naantali weather in April.
In January, temperatures in Naantali can drop significantly, with a minimum of -21°C (-6°F) and an average of -2°C (29°F), making it a chilly month complete with frequent precipitation measuring 48 mm (1.9 in) over about nine days, coupled with a high humidity level of 92%. In contrast, May showcases a much milder climate, featuring a minimum temperature of -4°C (26°F) and an average of 10°C (49°F), with daytime highs reaching a pleasant 26°C (79°F). The precipitation in May is slightly lower at 44 mm (1.7 in) over the same nine-day span, and humidity drops to 77%. For more details about the weather in this delightful month, you can check Naantali weather in May.
January and June exhibit stark contrasts in weather patterns. In January, temperatures can plummet to a minimum of -21°C (-6°F), with an average of -2°C (29°F) and a maximum of 8°C (47°F), creating a cold, wintery atmosphere complemented by high humidity at 92%. This month also sees 48 mm (1.9 in) of precipitation spread across 9 days. In contrast, June brings a much milder climate with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 28°C (83°F) and an average temperature of 16°C (61°F). The precipitation slightly decreases to 43 mm (1.7 in) over 7 days, and the humidity also drops to 78%. For a closer look at June's delightful weather, check out Naantali weather in June.
In January, the weather is characterized by cold temperatures, with minimums dropping to -21°C (-6°F) and an average temperature of -2°C (29°F). The precipitation is relatively low at 48 mm (1.9 in) over nine days, but the humidity remains high at 92%, contributing to a chilly, damp atmosphere. In contrast, July brings a significant shift, with temperatures ranging from a minimum of 6°C (44°F) to a maximum of 31°C (89°F) and an average of 18°C (64°F). The month experiences slightly higher precipitation at 75 mm (3.0 in) over 11 days, with humidity levels at a more comfortable 78%. For more details on the July climate, you can check Naantali weather in July.
January and August present stark contrasts in weather. In January, temperatures plummet to a minimum of -21°C (-6°F), averaging around -2°C (29°F) and reaching a maximum of only 8°C (47°F). The month is characterized by high humidity levels at 92% and modest precipitation totaling 48 mm (1.9 in) over about 9 days. In contrast, August brings a more temperate climate, with minimum temperatures of 6°C (43°F), an average of 17°C (62°F), and highs that can soar to 28°C (83°F). August also sees increased rainfall, with a total of 87 mm (3.4 in) over 14 days, but the humidity is slightly lower at 79%. For a deeper look into the specifics of August in Naantali, check out Naantali weather in August.
In January, temperatures can plummet to a chilling minimum of -21°C (-6°F), with an average around -2°C (29°F) and a maximum of 8°C (47°F). The month experiences high humidity at 92% and a modest amount of precipitation over 9 days, totaling 48 mm (1.9 in). In contrast, September brings a much milder climate, with minimum temperatures around -1°C (31°F) and averages rising to 12°C (54°F), peaking at 23°C (73°F). The humidity is slightly lower at 86%, but the month sees increased precipitation, totaling 72 mm (2.8 in) over 12 days. For more detailed insights on the weather in September, you can check Naantali weather in September.
In January, the weather is characterized by significantly colder temperatures, with a minimum reaching -21°C (-6°F) and an average around -2°C (29°F), peaking at 8°C (47°F). The month also experiences high humidity at 92% and approximately 48 mm (1.9 in) of precipitation over 9 days. In contrast, October offers a milder climate, with temperatures ranging from a minimum of -5°C (23°F) to a maximum of 17°C (62°F), averaging 7°C (46°F). However, it sees more precipitation at 86 mm (3.4 in) spread over 17 days, while humidity is slightly lower at 90%. For more detailed insights into the weather during this month, visit Naantali weather in October.
January weather is characterized by much colder temperatures compared to November, with January's minimum plunging to -21°C (-6°F) and an average temperature around -2°C (29°F). In contrast, November milder temperatures, ranging from a minimum of -8°C (17°F) to a maximum of 13°C (56°F), create a more temperate atmosphere. Additionally, January experiences less precipitation, totaling 48 mm over about 9 days, while November sees a slightly higher 59 mm of rainfall spread over 12 days. The humidity levels remain relatively similar between the two months, with January at 92% and November at 91%. For those interested in further details, check out Naantali weather in November.
January and December weather in Naantali exhibit notable differences in temperature and precipitation patterns. January experiences slightly colder temperatures, with average highs around 8°C (47°F) and lows dipping to -21°C (-6°F), compared to December's average range from 7°C (45°F) to a minimum of -18°C (-1°F). Precipitation is also less frequent in January, occurring on about 9 days with a total of 48 mm (1.9 in), while December sees more rain, totaling 79 mm (3.1 in) over 15 days. However, January maintains a higher humidity level of 92%, compared to December's 89%. For a closer look at December weather specifics, you can visit Naantali weather in December.
As January blankets Naantali in its winter chill, it stands out from other months with its stark temperatures and high humidity. While the warmer months bring a vibrant atmosphere, January averages a biting cold that can plummet to -21°C. Comprising about nine days of precipitation, this month is notably damp, contributing to the 92% humidity that can make the air feel even colder. In contrast, the rest of the year welcomes milder temperatures and more varied weather patterns. For a closer look at Naantali's climate throughout the year, check out Naantali Climate.