June Weather in Portsmouth, United Kingdom

Last updated: March 17, 2025

June in Portsmouth, United Kingdom, presents a delightful blend of mild temperatures and moderate humidity, making it an ideal time to explore the vibrant coastal city. With maximum temperatures reaching 25°C (76°F) and an average of 16°C (61°F), residents and visitors can enjoy pleasant days. However, the month also brings some precipitation, totaling 73 mm (2.9 in) over 9 days, contributing to the lush greenery commonly found in the region. Coupled with high humidity levels of 80%, June showcases Portsmouth's ability to balance warmth and refreshing breezes, inviting outdoor adventures amidst the charming scenery.

June Temperature in Portsmouth

In June, Portsmouth, United Kingdom, basks in the warmth of early summer, with temperatures showing a delightful progression towards the season's peak. The month welcomes a minimum of 9°C (49°F), a comfortable rise from the preceding months, while the average temperature settles at a pleasant 16°C (61°F). The city can expect maximum highs reaching up to 25°C (76°F), making it an ideal time for outdoor activities and enjoying the picturesque coastal views. This upward trend not only marks June as one of the warmest months in Portsmouth but also sets the stage for the increasingly temperate conditions that follow in July and August. With each sunny day, residents and visitors alike can relish the vibrant atmosphere that summer brings, making June a truly inviting time to explore the charming city.

June Weather in Portsmouth: Daily Temperature Highs, Lows, and Averages

The chart illustrates June temperature patterns in Portsmouth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec444546495561646461565047
Data source: Temperature data for Portsmouth 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.

June Precipitation in Portsmouth

June in Portsmouth sees a notable uptick in precipitation, with 73 mm (2.9 in) of rain falling over 9 days, marking a transition into the summer months. This amount is significantly higher than the 32 mm (1.3 in) recorded in April and comparable to the 75 mm (3.0 in) from February, suggesting a more temperate climate as spring gives way to summer. While May experiences 56 mm (2.2 in) over the same number of days, June's rain indicates the onset of typical British summer weather, where occasional showers pepper the otherwise moderate warmth. As the months progress, the rainfall patterns underscore a general trend of increasing precipitation leading into the more notoriously wet autumn, with July's total dropping slightly to 58 mm (2.3 in) as the weather becomes more stable.

June Precipitation Trends in Portsmouth

The chart displays monthly precipitation patterns in Portsmouth, with values for each month alongside June's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how June's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec68757032567358785711787118
Data source: Precipitation data for June generated using information from the Copernicus Climate Change Service.
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June Humidity in Portsmouth

As June rolls into Portsmouth, the humidity settles at a moderate 80%, marking a slight uptick from the drier conditions of May. This month serves as a transition, bridging the higher humidity levels typical of early spring—where figures hover around 85%—and the drier summer months ahead, which see July dipping to 71%. Notably, June’s humidity reflects the enduring maritime climate of the area, maintaining a balanced feel as the city starts to embrace warmer weather. Following a pattern where humidity generally decreases throughout the summer, June provides a refreshing yet comfortably humid atmosphere, paving the way for a pleasant summer ahead.

June Average Humidity in Portsmouth

This chart illustrates the average monthly humidity levels in Portsmouth, with June's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how June's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%86%85%79%81%71%76%82%91%92%92%
Data source: Humidity data for June generated using information from the Copernicus Climate Change Service.

June UV Index in Portsmouth

As summer approaches, Portsmouth experiences a notable shift in its UV Index, with June's UV Index reaching an impressive 8, classifying it in the very high exposure category. This significant increase from May's UV Index of 7 signals that residents and visitors alike should be more vigilant about sun safety, as the burn time drops to just 15 minutes. Notably, this trend of rising UV levels continues into July, maintaining the very high risk, before tapering off in August and September. With this in mind, it's crucial to stay informed and protect your skin during these sunny months. For more information on the UV trends and guidelines, explore the Portsmouth UV Index.

Maximum UV Index Levels in Portsmouth for June

The chart shows the monthly maximum UV Index (UVI) for Portsmouth in June, 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.
JanFebMarAprMayJunJulAugSepOctNovDec224578876421
Data source: Portsmouth June 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.

June Sunshine in Portsmouth

As the summer unfolds in Portsmouth, June shines brightly with an impressive 407 hours of sunshine, marking a slight dip from May's peak but still offering plenty of delightful days under the sun. The gradual ascent from January's meager 105 hours to June highlights a clear upward trend in sunshine hours, making this coastal city a vibrant destination as the year progresses. Following June, July promises even more sunshine, with 423 hours, solidifying the season's reputation for warmth and brightness. This pattern offers locals and visitors alike a chance to revel in Portsmouth's outdoor pleasures, from picturesque beaches to lively festivals, as the climate transforms into a sun-soaked summer haven.

Monthly Sunshine Duration in Portsmouth: June Highlighted

The June sunshine duration represents the total number of hours Portsmouth experiences direct sunlight during the month of June, excluding cloudy or obstructed periods. This chart compares the sunshine duration of June with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec105h146h222h344h410h407h423h386h320h252h159h118h
Data source: Portsmouth June Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Portsmouth During June

In June, the likelihood of sunny weather in Portsmouth, United Kingdom, stands at 30%, reflecting a notable decline from the more promising 58% chance in April. This mid-summer month often gets overshadowed by the sunnier conditions found in July and August, where the chances rise to 42% and 33%, respectively. Interestingly, while June's sun probability dips below that of earlier spring, it still marks a significant uptick from the duller winter months. As residents and visitors alike anticipate the warmth and light of summer, the changing pattern highlights the unpredictable nature of England's weather, leaving a tantalizing chance for sun amidst the ever-present clouds.

Percentage of Sunny Days in June in Portsmouth

The chart illustrates the percentage of sunny days in Portsmouth throughout the year, with June 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 Portsmouth experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec22%26%38%58%41%30%42%33%37%30%37%22%
Data source: Portsmouth June chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Portsmouth in June

In June, Portsmouth experiences an inviting 16 hours of daylight, marking the peak of summer and the longest days of the year. The gradual increase from 8 hours in January to 15 hours in May showcases a significant growth in sunlight, energizing the city as it transitions into a season filled with outdoor activities and vibrant community events. Following June, daylight begins to wane slightly, with 15 hours in July and 14 hours in August. This trend underscores the fleeting nature of summer, as Portsmouth prepares to embrace shorter days leading into the autumn months. Overall, June stands out as a dazzling highlight, embracing the warmth and brightness of summer in this charming coastal city.

Average Daylight Hours in Portsmouth for June

The chart illustrates the variation in daylight duration in Portsmouth throughout the year, with June highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 31m10h 2m11h 55m13h 50m15h 31m16h 23m15h 55m14h 25m12h 34m10h 39m8h 56m8h 2m
Data source: Portsmouth daylight hours, calculated by summing the hours between sunrise and sunset for each day.

June Winds in Portsmouth

As June arrives in Portsmouth, the winds begin to mellow, with an average speed of just 4.0 m/s (9 mph), marking a significant dip from the brisker gusts of earlier spring months. This gentle breeze provides a welcome shift, inviting residents and visitors alike to enjoy the long, sunny days without the blustery climes typical of past months. Interestingly, the trend of reduced wind speeds continues into July, although they gradually pick up again as summer transitions into autumn. Overall, June’s calmer winds make it an ideal time to embrace outdoor activities, leisurely strolls, and the vibrant seaside atmosphere of this charming coastal city.

Average June Wind Speed in Portsmouth

The chart displays monthly wind speed patterns in Portsmouth, with values for each month shown alongside June's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how June's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec6.46.95.84.86.14.0 m/s4.65.34.86.25.36.4
Data source: Portsmouth June wind data, generated using information from the Copernicus Climate Change Service.

How June Weather in Portsmouth Compares to Other Months

The weather in Portsmouth 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 Portsmouth and find detailed weather information for every month.

In comparing the weather of June and January, June generally offers a milder climate with average temperatures ranging from a minimum of 9°C (49°F) to a maximum of 25°C (76°F). With an average precipitation of 73 mm (2.9 in) over about 9 days, humidity levels sit at around 80%. In contrast, January is much colder, with temperatures ranging from a minimum of 0°C (32°F) to a maximum of 13°C (56°F). Despite slightly lower precipitation at 68 mm (2.7 in) and over 11 days, the humidity is higher at 91%. For a closer look at January's climate specifics, you can check out Portsmouth weather in January.

June and February present contrasting weather experiences. In June, temperatures range from a mild 9°C (49°F) to a pleasant 25°C (76°F), with an average of 16°C (61°F), while February is significantly colder, with temperatures dipping as low as -3°C (28°F) and averaging just 7°C (45°F). Both months experience a similar amount of precipitation, with June receiving 73 mm (2.9 in) over 9 days and February slightly more at 75 mm (3.0 in) over 12 days. Humidity levels are notably higher in February at 89%, compared to June's 80%, making February feel even chillier. For more detailed information, check out Portsmouth weather in February.

When comparing the weather in June and March, it's clear that June is significantly warmer. June boasts an average temperature of 16°C (61°F), with highs reaching up to 25°C (76°F), while March has a much chillier average of 8°C (47°F) and a maximum temperature of only 14°C (58°F). Additionally, June experiences slightly less precipitation at 73 mm (2.9 in) over 9 days compared to March's 70 mm (2.7 in) over 13 days. Humidity levels also differ, with March being slightly more humid at 86%, compared to June's 80%. For more detailed information, you can visit Portsmouth weather in March.

In comparing the weather of June and April, June is significantly warmer, with an average temperature of 16°C (61°F), compared to April's cooler average of 10°C (50°F). June experiences higher maximum temperatures reaching up to 25°C (76°F), while April peaks at 19°C (66°F). Precipitation is more frequent in June, occurring over 9 days with a total of 73 mm (2.9 in), compared to April's 32 mm (1.3 in) over just 7 days. Humidity is slightly lower in June at 80%, compared to April's 85%. For more details on April's weather, visit Portsmouth weather in April.

In comparing the weather between May and June, June tends to be warmer, with temperatures ranging from a minimum of 9°C (49°F) to a maximum of 25°C (76°F), while May sees slightly cooler temperatures with a minimum of 5°C (41°F) and a maximum of 22°C (71°F). The average temperature in June is also higher at 16°C (61°F) compared to May’s 13°C (55°F). However, June is accompanied by more precipitation, with 73 mm (2.9 in) falling over 9 days, as opposed to May's 56 mm (2.2 in) spanning 11 days. Humidity levels remain quite similar, with June at 80% and May at 79%. For a detailed look at May weather, you can check out Portsmouth weather in May.

In comparing the weather between June and July, June tends to be cooler with temperatures ranging from a minimum of 9°C (49°F) to a maximum of 25°C (76°F), while July sees slightly warmer temperatures with a minimum of 12°C (53°F) and the same maximum of 25°C (78°F). June experiences more precipitation, totaling 73 mm (2.9 in) over 9 days, compared to July's 58 mm (2.3 in) across 11 days, indicating that while July is wetter in terms of rainy days, it has lower overall rainfall. Additionally, June has a higher humidity level at 80%, whereas July's humidity drops to 71%. For a more detailed look at July's climate, you can visit Portsmouth weather in July.

June and August weather in Portsmouth show some notable differences. In June, temperatures range from a minimum of 9°C (49°F) to a maximum of 25°C (76°F), with an average temperature of 16°C (61°F). The month sees around 73 mm (2.9 in) of precipitation over approximately 9 days, along with relatively high humidity at 80%. In contrast, August offers slightly warmer temperatures, with a minimum of 11°C (52°F), an average of 18°C (64°F), and a maximum of 26°C (80°F). Precipitation increases slightly to 78 mm (3.1 in) over 12 days, while humidity remains lower at 76%. Overall, August tends to be warmer and slightly wetter than June. For more detailed information, check Portsmouth weather in August.

June and September share similar average temperatures, with June ranging from a minimum of 9°C (49°F) to a maximum of 25°C (76°F), and September having slightly cooler temperatures, with a minimum of 8°C (47°F) and a maximum of 24°C (76°F). Both months experience a similar average temperature of 16°C (61°F), indicating a consistent climate. However, June tends to be wetter, with precipitation of 73 mm (2.9 in) spread over 9 days, compared to September, which has 57 mm (2.2 in) over 10 days. Additionally, September has a marginally higher humidity level at 82%, compared to June's 80%. For more detailed insights into September's weather, check out Portsmouth weather in September.

June and October offer distinctly different weather patterns. In June, temperatures range from a pleasant 9°C (49°F) at night to a warm 25°C (76°F) during the day, with an average of 16°C (61°F). The month experiences moderate rainfall of 73 mm (2.9 in) over about 9 days and maintains a relative humidity of 80%. In contrast, October sees cooler temperatures, with a minimum of 4°C (40°F) and a maximum of 20°C (68°F), leading to a lower average of 13°C (56°F). Rainfall increases significantly to 117 mm (4.6 in) spread over 16 days, accompanied by higher humidity levels of 90%. For a detailed look at the weather in October, check out Portsmouth weather in October.

June and November present distinct contrasts in weather patterns. In June, temperatures range from a minimum of 9°C (49°F) to a pleasant maximum of 25°C (76°F), with an average of 16°C (61°F). The month experiences relatively moderate precipitation of 73 mm (2.9 in) over about 9 days and a humidity level of 80%. In contrast, November brings cooler temperatures, with a minimum of 1°C (33°F) and an average of just 10°C (50°F), reaching a maximum of 16°C (61°F). Precipitation increases to 87 mm (3.4 in) over approximately 15 days, accompanied by higher humidity, reaching 92%. For more details on November weather, check out Portsmouth weather in November.

June and December present contrasting weather patterns. In June, temperatures range from a low of 9°C (49°F) to a high of 25°C (76°F), with an average of 16°C (61°F) and relatively lower precipitation of 73 mm (2.9 in) over approximately 9 days. The humidity sits at a comfortable 80%, making it a pleasant month for outdoor activities. In stark contrast, December features much cooler temperatures that vary from a minimum of 0°C (33°F) to a maximum of 14°C (57°F), averaging around 8°C (47°F). The month is wetter, with 118 mm (4.7 in) of precipitation spread over 16 days and higher humidity at 92%. This highlights the distinct seasonal shift, as the milder June gives way to the chillier and wetter conditions of December. For more detailed insights, check out Portsmouth weather in December.

Compare Portsmouth's Climate with Cities Worldwide

Conclusion: What to Expect From June Weather in Portsmouth

As June unfolds in Portsmouth, the weather ushers in a delightful shift, marked by warmer temperatures and vibrant days. Unlike the chillier months that precede it, June sees a rise in average temperatures, with sunny afternoons that invite outdoor activities. While there may be a few rain showers, they are far outweighed by the increase in pleasant conditions. The humidity tends to linger, adding a touch of tropical feel to the coastal breeze. This emerging warmth and the generally favorable climate set the stage for summer adventures, making June a perfect time to explore all that Portsmouth has to offer. For more insights into seasonal trends, check out Portsmouth Climate.