Last updated: February 24, 2025
In Boulder, United States, June offers a dynamic weather landscape, with maximum temperatures reaching up to 34°C (93°F), highlighting the month’s warm and vibrant nature. The average temperature settles comfortably at 17°C (63°F), while the minimum can dip to a brisk 3°C (37°F), showcasing the range of conditions residents and visitors experience. This month sees 74 mm (2.9 in) of precipitation spread over 14 days, contributing to a humidity level of 58%, which can add a refreshing touch to the otherwise warm days. Whether soaking up the sun or enjoying the occasional rain shower, June in Boulder is a captivating blend of warmth and refreshing moisture.
In June, Boulder, United States, experiences a delightful shift as temperatures rise significantly, presenting a refreshing contrast to the chill of earlier months. The minimum temperature climbs to a mild 3°C (37°F), while the average reaches a comfortable 17°C (63°F), inviting residents and visitors alike to enjoy outdoor activities. With a peak temperature of 34°C (93°F), the month showcases its warmest days, making it an ideal time for hiking and exploring the stunning landscapes. This upward trend in warmth, particularly in comparison to the lingering cold of winter and the gradual improvement through spring, marks June as a vibrant, sun-soaked month that enhances the charm of Boulder and beckons everyone to embrace the great outdoors.
June in Boulder marks a transition into summer, bringing a substantial 74 mm (2.9 in) of rainfall over 14 days. This amount is notable, especially following May's peak precipitation of 134 mm (5.3 in), which signifies the region's wettest month. Interestingly, June’s rainfall, while lower than May, continues the trend of increased moisture that has built up through the spring months. However, as the month closes and July approaches, expectations shift slightly with precipitation forecasted to remain similar at 71 mm (2.8 in), suggesting a seasonal pattern of consistent rainfall that supports the lush landscapes typical of this time in Boulder. Thus, June solidifies its role as a pivotal month in the climatic rhythm of the region, balancing the remnants of spring’s vigor with the gradual warming of summer.
As June arrives in Boulder, the air begins to feel noticeably drier, with humidity levels dropping to 58%. This shift marks a significant decrease from the 66% experienced in May, illustrating a clear trend towards lower humidity as summer progresses. Following the wetter winter months, which see humidity peaking at 88% in January and remaining relatively high through April, Boulder transitions into a more arid phase. The trend continues into July, where humidity reaches its lowest point at 52%, emphasizing the region's shift toward warmer, drier conditions typical of summer. This seasonal fluctuation not only enhances the sunshine-filled days but also contributes to the region's unique climate character.
As summer approaches, Boulder experiences a significant rise in its UV Index, peaking at 12 in June, which is categorized as extreme. This escalation from moderate levels in January to extreme in June illustrates the urgent need for sun protection during this time, as the burn time shrinks to just 10 minutes. Notably, June shares this extreme classification with both July and May, highlighting a trend of persistently high UV levels. With outdoor activities on the rise, it’s essential to stay informed about these conditions to ensure safety under the Colorado sun. For more details about UV exposure year-round, check out Boulder UV Index.
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June in Boulder, United States, ushers in a spectacular display of sunshine, with an impressive 374 hours of sunlight lighting up the days. This marks a significant leap from the earlier months, showcasing a steady trend of increasing sunshine hours as spring transitions into summer. After welcoming 330 hours in May, June's brightness not only elevates the mood of the city but also invites outdoor adventures and community gatherings. Following June, July slightly edges out with 378 hours, maintaining that summer glow, while sunshine hours gradually taper off as the year progresses into the fall. This consistent rise and eventual tapering of sunlight reflect Boulder’s vibrant seasonal rhythm, inviting both locals and visitors to bask under its sunny skies.
In Boulder, the likelihood of sunny weather in June is 55%, which is a promising start to the summer. This month marks a noticeable uptick in sunshine compared to the preceding months, especially from May, which sees only 41% sunny days. As the year progresses, the chances of sunny weather tend to rise, peaking in late summer and early autumn. July and August boast even higher probabilities at 59% and 65%, respectively, leading to an enticing stretch of warmth and brightness. This trend towards sunnier days not only characterizes Boulder’s June but also sets the stage for outdoor activities as the season unfolds.
In Boulder, June marks a peak in daylight duration, with 14 hours of sunlight gracing the skies, a delightful continuation of the extended days witnessed since spring. This month embodies the transition from spring's gradual increase in light, where daylight gradually rises from 11 hours in March to a full 14 hours by May, before holding steady through July. As the summer solstice approaches, residents can revel in the bright, vibrant evenings that characterize this time of year. However, as the seasons shift to autumn, the gradual decline in daylight reminds us of nature's cycles, with hours of light dwindling to 13 in August and further down to 12 in September. The rhythm of daylight in Boulder encapsulates the beauty of each season, inviting both adventure and tranquility throughout the year.
In June, Boulder experiences a gentle breeze with an average wind speed of 2.3 m/s (5 mph), slightly recovering from the more subdued winds of May, which averaged just 2.1 m/s (5 mph). This modest uptick continues a seasonal trend, as wind speeds typically hover around similar levels during the summer months. July and August show a marginal dip back to 2.1 m/s (5 mph) and 2.2 m/s (5 mph) respectively, illustrating a stable yet soft atmospheric embrace as summer unfolds. Overall, the gradual variances in wind patterns hint at Boulder’s pleasant, laid-back summer climate, making it an ideal time for outdoor activities and enjoying the great outdoors.
The weather in Boulder 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 Boulder and find detailed weather information for every month.
June and January present stark contrasts in weather. In June, temperatures range from a minimum of 3°C (37°F) to a maximum of 34°C (93°F), with an average of 17°C (63°F). This month experiences higher humidity levels at 58% and receives around 74 mm (2.9 in) of precipitation over 14 days. Conversely, January is marked by much colder conditions, with temperatures plunging to a minimum of -24°C (-12°F) and averaging -3°C (26°F), peaking at 15°C (59°F). The precipitation in January is significantly lower at 25 mm (1.0 in) over just 5 days, accompanied by a higher humidity level of 88%. For more detailed insights, you can check Boulder weather in January.
When comparing the weather in June and February, the differences are striking. June boasts a much warmer climate, with average temperatures ranging from a minimum of 3°C (37°F) to a maximum of 34°C (93°F), along with moderate humidity at 58%. Conversely, February experiences far colder conditions, with an average temperature ranging from -26°C (-14°F) to a maximum of 20°C (69°F) and high humidity of 87%. Additionally, June sees significantly more rainfall, with 74 mm (2.9 in) falling over 14 days, while February has a drier month with only 36 mm (1.4 in) of precipitation over 9 days. For a detailed look at February's weather, you can visit Boulder weather in February.
When comparing the weather in June and March, it's clear that these months offer distinctly different climates. June boasts a much warmer temperature range with a minimum of 3°C (37°F), an average of 17°C (63°F), and a maximum of 34°C (93°F). In contrast, March sees much cooler conditions, starting from a chilling minimum of -21°C (-5°F) and averaging only 2°C (35°F) while reaching a maximum of 23°C (73°F). Additionally, June experiences higher precipitation levels at 74 mm (2.9 in) over 14 days, compared to March's 62 mm (2.5 in) over 11 days. The humidity levels also differ, with March being more humid at 81% compared to June's 58%. For a more detailed look at March weather, you can check Boulder weather in March.
In comparing the weather of June and April, we see a stark contrast. June boasts a much warmer temperature range, with a minimum of 3°C (37°F) and a maximum of 34°C (93°F), averaging around 17°C (63°F). In stark contrast, April experiences a cooler climate, with temperatures dipping as low as -17°C (2°F) and peaking at 24°C (75°F), averaging only 5°C (42°F). Both months receive similar levels of precipitation, with June at 74 mm (2.9 in) and April at 68 mm (2.7 in), though June has slightly more wet days (14) compared to April's 12. Moreover, April's higher humidity at 76% compared to June's 58% adds to the lingering chill of early spring. For a more detailed look at April's weather, you can visit Boulder weather in April.
In comparing the weather between May and June, it is clear that June experiences a milder overall climate with temperatures ranging from a minimum of 3°C (37°F) to a maximum of 34°C (93°F), while May has a broader range from a chilly -9°C (17°F) to a warmer 27°C (81°F). Although June has an average temperature of 17°C (63°F), significantly higher than May's average of 10°C (50°F), it also experiences less precipitation, with 74 mm (2.9 in) over 14 rainy days compared to May's 134 mm (5.3 in) over 16 days. Humidity levels are slightly lower in June at 58%, compared to May’s 66%. For more detailed information, you can check Boulder weather in May.
In comparing the weather of June and July, July tends to be slightly warmer, with average temperatures rising from 17°C (63°F) in June to 20°C (68°F). While both months experience maximum temperatures reaching up to 34°C (93°F), July has a higher minimum temperature of 7°C (45°F) compared to June's 3°C (37°F). Additionally, July sees a marginally lower level of precipitation at 71 mm (2.8 in) over 16 days, compared to June's 74 mm (2.9 in) over 14 days, and it also features reduced humidity at 52% versus June's 58%. For a detailed look at Boulder weather patterns, visit Boulder weather in July.
June and August display similar temperature patterns, with June experiencing a wider range from a minimum of 3°C (37°F) to a maximum of 34°C (93°F), while August has a slightly higher minimum temperature of 7°C (45°F) and a maximum of 33°C (91°F). The average temperature in June is 17°C (63°F), which is closely matched by August's average of 19°C (67°F). In terms of precipitation, June has slightly more rainfall at 74 mm (2.9 in) over 14 days compared to August's 67 mm (2.7 in) over 13 days, with humidity levels being quite comparable at 58% in June and 56% in August. For more insights into August weather, you can visit Boulder weather in August.
June and September exhibit notable differences in weather patterns. In June, temperatures can range from a cool 3°C (37°F) to a sweltering 34°C (93°F), with an average of 17°C (63°F) and higher humidity at 58%. The month also experiences precipitation on about 14 days, totaling 74 mm (2.9 in). In contrast, September sees cooler conditions, with temperatures dropping to a minimum of -4°C (25°F) and an average of 16°C (61°F), while still reaching a maximum of 33°C (92°F). It has less rainfall, with only 42 mm (1.6 in) over 8 days and slightly higher humidity at 65%. For more details on the weather typical of this month, visit Boulder weather in September.
June and October present contrasting weather patterns, showcasing the transition from summer to autumn. In June, temperatures range from a cool 3°C (37°F) at night to a warm average of 17°C (63°F), reaching highs of up to 34°C (93°F) during the day. The month experiences 14 days of precipitation, totaling 74 mm (2.9 in), with a humidity level of 58%. In contrast, October's weather is much chillier, with overnight lows plummeting to -20°C (-5°F) and an average temperature of 7°C (45°F). Daytime highs peak at 26°C (79°F), and the month sees fewer rainy days (7) with a total precipitation of 48 mm (1.9 in) and a higher humidity level of 76%. For a more detailed look at October weather, visit Boulder weather in October.
June and November exhibit stark contrasts in weather characteristics. In June, temperatures range from a mild minimum of 3°C (37°F) to a scorching maximum of 34°C (93°F), with an average of 17°C (63°F), accompanied by moderate humidity at 58%. Rainfall is also present, with 74 mm (2.9 in) expected over about 14 days. In contrast, November brings much colder conditions, with temperatures dipping to a brisk minimum of -16°C (3°F) and an average of only 2°C (36°F). The month features a maximum temperature of 22°C (71°F) but is significantly drier, receiving only 30 mm (1.2 in) of precipitation over roughly 6 days and higher humidity at 82%. To see more about the weather in Boulder during November, you can visit Boulder weather in November.
In June, the weather features a broad range of temperatures with a minimum of 3°C (37°F), an average of 17°C (63°F), and a maximum reaching up to 34°C (93°F). This month is marked by significant precipitation, totaling 74 mm (2.9 in) over approximately 14 days, and a humidity level of 58%. In stark contrast, December experiences much colder conditions, with temperatures ranging from a minimum of -19°C (-1°F) to an average of -2°C (29°F), peaking at just 19°C (67°F). The month sees considerably less precipitation at 19 mm (0.8 in) over about 4 days, alongside a higher humidity of 89%. For more detailed information, you can check Boulder weather in December.
As June settles in Boulder, it ushers in a distinct shift in weather patterns compared to the preceding months. Temperatures soar, with highs often reaching into the mid-30s°C, creating a warm and inviting atmosphere perfect for outdoor activities. Despite this warmth, the month is accompanied by notable humidity and sporadic precipitation, as rain falls on roughly half the month, contributing to the greenery that flourishes at this time of year. This combination of warmth and moisture sets June apart, making it a vibrant prelude to summer adventures. For a deeper dive into what to expect year-round, visit Boulder Climate.