Last updated: February 24, 2025
In June, Friday Harbor experiences mild temperatures with a maximum reaching 20°C (69°F) and an average of 13°C (55°F), making it a pleasant time to explore the scenic beauty of the region. The weather can be a bit unpredictable, with minimum temperatures dropping to 10°C (49°F). Rainfall is present, totalling 32 mm (1.3 in) over approximately six days, contributing to the area's lush greenery. Humidity levels hover around 83%, adding to the freshness of the air. Whether enjoying outdoor activities or cozying up indoors, June in Friday Harbor offers a charming blend of maritime climate and vibrant nature.
In June, Friday Harbor begins to bask in the warmth of summer, showcasing a noticeable rise in temperatures compared to the earlier months. With minimums averaging 10°C (49°F) and reaching up to 20°C (69°F) during peak days, the overall feel is distinctly milder as the community transitions from spring's chill. The average temperature settles around 13°C (55°F), marking a significant shift from the brisk temperatures of winter and early spring. This warm trend sets the stage for vibrant outdoor activities and enjoying the stunning natural surroundings, inviting both locals and visitors to embrace the season's charm. As the month progresses, the increasing warmth hints at the forthcoming heat of July and August, making June a delightful prelude to the summer ahead.
In June, Friday Harbor experiences a noticeable decline in precipitation, with only 32 mm (1.3 in) of rain falling over just 6 days. This marks a continuation of the trend towards drier conditions as spring transitions to summer; May saw 39 mm, while earlier months like January and February were significantly wetter with 143 mm and 126 mm, respectively. This pattern highlights how the warmer months typically bring reduced rainfall, providing ample opportunity for outdoor activities under the clear skies of summer. As the year progresses, the precipitation amount decreases further in July and August, underscoring the distinctive climatic variations that characterize this picturesque region.
In June, Friday Harbor experiences a slight dip in humidity, averaging 83%, following a gradual decline from the 86% levels seen in the preceding months from January to April. This modest reduction marks a shift towards the warmer summer months, as humidity continues its gradual ebb into July. Notably, while June stands out with its relatively comfortable humidity, the trend remains consistent with the overall pattern of elevated moisture levels typical in the winter and early spring, peaking again in the fall. This transition offers residents and visitors a brief interlude of milder humidity before the summer heat sets in.
As summer approaches in Friday Harbor, the UV Index steadily climbs, signaling increased sun intensity and the need for proper sun protection. Starting from a modest UV Index of 2 in January, the levels gradually rise, culminating in a striking UV Index of 9 in both June and July, classified as very high. With such ratings, the burn time decreases to a swift 15 minutes, emphasizing the urgency for sun safety measures. As we transition from May to June, the UV Index jumps from 8 to 9, reflecting a marked increase in sun exposure risk. This trend continues into August, where values remain elevated. Following this peak, levels begin to gradually decrease, highlighting the importance of monitoring UV conditions throughout the season. For more detailed insights into sun safety, check out the Friday Harbor UV Index.
UV Risk Categories
June in Friday Harbor ushers in a radiant transition into summer, boasting an impressive 353 hours of sunshine. This month stands out as a peak in the trend initiated by May's 339 hours, showcasing the region's warming embrace as daylight begins to dominate. Following the gradual ascent from a chilly 87 hours in January through the steady increase in luminosity, June’s sun-kissed days pave the way for the sunniest month of the year, July, which captures 390 hours. As spring shifts into summer, residents and visitors alike revel in the vibrant days ahead, reflecting the ongoing pattern of increasing sunlight that continues to infuse the community with warmth and energy.
In Friday Harbor, June marks a delightful turning point in the year's weather patterns, boasting a 58% chance of sunny days. This is a significant rise from the earlier months, where the likelihood of sunshine gradually increases from a low of 21% in January to nearly 55% by April. As summer approaches, the sunny probabilities peak with July showcasing an impressive 77% chance, making this June an ideal time for outdoor activities. Visitors can expect longer and brighter days, perfectly aligned with the region's stunning natural beauty, making it a prime moment to explore and enjoy the outdoors before the weather shifts again in the fall.
As June arrives in Friday Harbor, daylight reaches its zenith with an impressive 16 hours, marking the peak of the summer season. This month perfectly exemplifies the dramatic transition from the 8 hours of sunlight in January, gradually increasing to a flourishing period of prolonged daylight. Following the longer days of June, July witnesses a slight decline to 15 hours, while August continues the trend with 14 hours. The gradual tapering of daylight in the subsequent months reminds us of the cyclical nature of seasons, as September brings 12 hours, eventually retreating to 10 hours in October, and settling back at 8 hours by December. This rhythmic ebb and flow of sunlight not only dictates daily life in this charming locale but also beautifully showcases the vibrant dance of nature throughout the year.
In June, Friday Harbor experiences a gentle breath of wind, with an average speed of 4.3 m/s (10 mph), signaling the transition to the balmy summer months. Following a steady decline from the brisker winds of earlier months, where speeds hovered between 6.3 and 6.4 m/s in the first two months of the year, June's winds continue the trend of mildness established in April and May. This slight uptick from 3.9 m/s in April and 4.0 m/s in May reflects the seasonal shift towards warmer, more pleasant conditions, as July maintains the same average speed. Overall, June offers a refreshing yet calm atmosphere, making it an ideal time for outdoor activities amidst the stunning landscapes of the San Juan Islands.
The weather in Friday Harbor changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of June's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Friday Harbor and find detailed weather information for every month.
June and January present contrasting weather conditions. In June, temperatures range from a minimum of 10°C (49°F) to a maximum of 20°C (69°F), with an average temperature of 13°C (55°F). The month sees relatively modest precipitation of 32 mm (1.3 in) over 6 days and humidity levels around 83%. In stark contrast, January experiences much colder weather, with temperatures ranging from a chilling -3°C (27°F) to a maximum of 11°C (52°F) and an average of 7°C (44°F). This winter month is significantly wetter, recording 143 mm (5.6 in) of precipitation across 16 days, while humidity rises slightly to 86%. For further details, you can check out the Friday Harbor weather in January.
When comparing the weather in June and February, there are clear contrasts in both temperature and precipitation. June experiences milder temperatures, with a minimum of 10°C (49°F) and an average of 13°C (55°F), peaking at a comfortable 20°C (69°F). In contrast, February is considerably colder, with temperatures ranging from a minimum of -3°C (27°F) to an average of 6°C (42°F), maxing out at just 11°C (52°F). Additionally, February sees significantly more precipitation, totaling 126 mm (5.0 in) over 17 days, compared to June’s 32 mm (1.3 in) over only 6 days. Despite February's higher humidity at 85% compared to June's 83%, the overall climate in June is notably more pleasant. For more detailed insights, check Friday Harbor weather in February.
In comparing the weather of June and March, June tends to be much warmer, with temperatures ranging from a minimum of 10°C (49°F) to a maximum of 20°C (69°F), while March sees cooler temperatures, with a range from 2°C (35°F) to 12°C (55°F). Precipitation levels also differ significantly, with March averaging 84 mm (3.3 in) of rain over 14 days, compared to June’s 32 mm (1.3 in) spread over just 6 days. Humidity levels remain relatively high in both months, with March at 86% and June slightly lower at 83%. For more specific details about the weather in March, you can visit Friday Harbor weather in March.
When comparing the weather in June and April, June generally offers warmer temperatures with a minimum of 10°C (49°F) and an average of 13°C (55°F), compared to April's lower range of 4°C (39°F) and an average of 9°C (48°F). However, April experiences higher precipitation levels, with 65 mm (2.6 in) over 13 days, while June sees only 32 mm (1.3 in) across 6 days. Additionally, humidity levels are slightly higher in April at 86%, compared to 83% in June. For more detailed information, you can check Friday Harbor weather in April.
In comparing June and May weather, June tends to be slightly warmer, with average temperatures ranging from a minimum of 10°C (49°F) to a maximum of 20°C (69°F), while May has a broader range with a minimum of 6°C (44°F) and a maximum of 18°C (64°F). Precipitation in June is lower at 32 mm (1.3 in) over 6 days, compared to May's 39 mm (1.5 in) over 7 days. Humidity remains fairly high in both months, with June at 83% and May at 81%. For more detailed information about the weather in May, you can check Friday Harbor weather in May.
In June, the weather is characterized by slightly cooler temperatures, with a minimum of 10°C (49°F) and an average of 13°C (55°F), while July experiences a marginal increase, starting from a minimum of 11°C (52°F) and an average of 14°C (58°F). Both months reach a maximum temperature of 20°C (68°F), indicating that daytime highs remain consistent. However, June sees more precipitation at 32 mm (1.3 in) over 6 days, compared to July's 16 mm (0.6 in) over only 3 days, making July a drier month overall. Humidity levels are also similar, with June at 83% and July slightly higher at 84%. For more detailed weather information, you can visit Friday Harbor weather in July.
In comparing the weather of June and August, June tends to be a bit cooler, with average temperatures ranging from a minimum of 10°C (49°F) to a maximum of 20°C (69°F). It experiences higher humidity at 83% and more precipitation, totaling 32 mm (1.3 in) over about 6 days. In contrast, August brings slightly warmer temperatures, with a minimum of 12°C (55°F) and a similar maximum of 20°C (69°F), but it is drier, with only 15 mm (0.6 in) of precipitation over 3 days and a decrease in humidity to 77%. For more detailed insights into August weather, you can check Friday Harbor weather in August.
In June, temperatures range from a minimum of 10°C (49°F) to a maximum of 20°C (69°F), with an average temperature of around 13°C (55°F). The month experiences relatively low precipitation, with about 32 mm (1.3 in) falling over just 6 days, and humidity levels are quite high at 83%. In contrast, September sees a slight increase in minimum temperature to 11°C (51°F), maintaining the same maximum temperature of 20°C (68°F) and an average of 13°C (57°F). However, it experiences more precipitation, totaling 68 mm (2.7 in) over 9 days, and the humidity decreases to 76%. For a more detailed look at weather patterns, you can check Friday Harbor weather in September.
June and October present quite distinct weather patterns. In June, temperatures range from a minimum of 10°C (49°F) to a maximum of 20°C (69°F), with an average of 13°C (55°F). This month experiences relatively low precipitation, around 32 mm (1.3 in), spread over about 6 days, and a humidity level of 83%. In contrast, October sees cooler temperatures, with a minimum of 5°C (41°F) and a maximum of 15°C (60°F), averaging 11°C (52°F). The month is significantly wetter, featuring 128 mm (5.1 in) of rain over approximately 15 days, coupled with a slightly higher humidity of 88%. For more detailed insights, you can check Friday Harbor weather in October.
June and November present distinctly different weather patterns. In June, temperatures range from a minimum of 10°C (49°F) to a comfortable maximum of 20°C (69°F), accompanied by relatively low precipitation of 32 mm (1.3 in) over just 6 days and a humidity level of 83%. In contrast, November experiences much cooler temperatures, with a minimum of 4°C (39°F) and a maximum of 13°C (56°F). It is also significantly wetter, receiving 194 mm (7.6 in) of rain across 19 days, while humidity rises slightly to 87%. For more detailed information, you can visit Friday Harbor weather in November.
June and December present stark contrasts in weather. In June, temperatures typically range from a mild 10°C (49°F) at night to a pleasant 20°C (69°F) during the day, with an average temperature of 13°C (55°F). Rainfall is minimal at 32 mm (1.3 in) over about 6 days, while humidity hovers at 83%, creating a comfortable environment. In contrast, December sees much colder conditions, with temperatures dipping as low as -7°C (20°F) at night and peaking at 12°C (54°F) during the day, averaging around 7°C (45°F). Precipitation significantly increases to 161 mm (6.3 in) across 18 days, accompanied by slightly higher humidity at 87%. For more details on December weather specifics, you can check Friday Harbor weather in December.
As June arrives in Friday Harbor, the weather begins to transition into a more temperate climate, showcasing warmer temperatures than earlier months. With an average low of 10°C and highs peaking at 20°C, this month presents a delightful balance of mild and sunny days, perfect for outdoor activities. However, it's also characterized by increased humidity levels, averaging around 83%, and a moderate amount of rainfall, with about 6 days of precipitation throughout the month. This unique blend of warmth and moisture sets June apart, indicating the start of summer while still embracing the Pacific Northwest's variable weather. For a deeper look into the overall climate trends, visit Friday Harbor Climate.