July Weather in Swansea, United Kingdom

Last updated: March 17, 2025

July in Swansea, United Kingdom, presents a delightful blend of mild temperatures and occasional rain. With maximum highs reaching 24°C (76°F) and an average temperature of 17°C (62°F), the month invites outdoor activities despite experiencing 91 mm (3.6 in) of rainfall over 13 days. The air feels refreshing with an average humidity of 70%, making it a vibrant time to explore this coastal city. Whether it’s a sun-filled day or a gentle shower, Swansea in July offers a unique charm for both locals and visitors alike.

July Temperature in Swansea

In July, Swansea, United Kingdom, experiences a delightful summer climate, with temperatures reaching a comfortable average of 17°C (62°F). The month starts with a minimum temperature of 11°C (52°F), providing a pleasant warmth that encourages outdoor activities. With a maximum of 24°C (76°F), July often showcases the best of Swansea's sunny days, inviting both locals and tourists to enjoy its waterfront and parks. This marks a notable increase from the cooler spring months, illustrating a clear trend of rising temperatures as summer unfolds, making July one of the most inviting times to explore the vibrant coastal city.

July Weather in Swansea: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in Swansea, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec444546495359626259555047
Data source: Temperature data for Swansea 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.

July Precipitation in Swansea

In July, Swansea experiences a moderate rainfall of 91 mm (3.6 in), which falls over approximately 13 days. This amount marks a slight dip compared to the wetter months that precede it, such as June and August, with their higher precipitation of 93 mm and 123 mm, respectively. The trend suggests that while July does bring its share of showers, it often serves as a brief respite before the intensifying rains of autumn begin in October, which records a significant increase of 184 mm. Overall, July’s climate balances warmth and wandering clouds, making it a quintessential British summer month, even as it maintains a consistent pattern of rainfall typical for this coastal region.

July Precipitation Trends in Swansea

The chart displays monthly precipitation patterns in Swansea, with values for each month alongside July's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec10612811456809391123120184143184
Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.
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July Humidity in Swansea

In July, Swansea experiences a notable shift in humidity, dipping to 70%—the lowest level of the year. This transition marks a welcome breath of fresh air compared to the consistently high humidity levels found in the earlier winter months, which hover around 88% through February. As spring unfolds, humidity gradually decreases, reaching 80% in both May and June. However, with July’s arrival, residents can finally enjoy a reprieve from the muggy conditions, making it a prime time for outdoor activities. As summer progresses into August, humidity only slightly increases to 73%, indicating that while July offers a dry escape, the typical maritime climate resumes its influence toward the end of the season.

July Average Humidity in Swansea

This chart illustrates the average monthly humidity levels in Swansea, with July's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how July's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%86%84%80%80%70%73%79%89%90%89%
Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in Swansea

In July, Swansea experiences its peak UV Index with a rating of 8, indicating a very high level of solar radiation. This means that sun exposure can lead to skin damage in just 15 minutes, underscoring the importance of protection during the summer months. Interestingly, July maintains the same UV Index as June, suggesting a consistent risk for sunburn as the season reaches its zenith. As summer transitions into August, there’s a slight decline in the index to 7, marked as high, but with a longer burn time of 25 minutes. This trend demonstrates that while the sun’s intensity diminishes slightly, vigilance remains essential for skin safety. For more details and updates, check out the Swansea UV Index.

Maximum UV Index Levels in Swansea for July

The chart shows the monthly maximum UV Index (UVI) for Swansea in July, 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.
JanFebMarAprMayJunJulAugSepOctNovDec124678876421
Data source: Swansea July 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.

July Sunshine in Swansea

In July, Swansea basks in an impressive 418 hours of sunlight, showcasing one of the year's peak periods for warmth and brightness. This surge in sun-drenched days follows a steady ascent from January's mere 93 hours, highlighting a remarkable seasonal transition. The increase is especially notable from June, which boasts 391 hours, indicating that July truly embraces summer's full embrace. As the summer progresses into August, the sunshine begins to wane to 374 hours, suggesting a gradual shift towards the cooler months ahead. Overall, July stands as a golden gem in Swansea's climatic crown, embodying the vibrancy of British summer days.

Monthly Sunshine Duration in Swansea: July Highlighted

The July sunshine duration represents the total number of hours Swansea experiences direct sunlight during the month of July, excluding cloudy or obstructed periods. This chart compares the sunshine duration of July with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec93h151h219h333h404h391h418h374h309h241h135h110h
Data source: Swansea July Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Swansea During July

In Swansea, July brings a tangible shift in sunshine probabilities, with a 42% chance of clear skies—a noticeable increase compared to the cooler months earlier in the year. This trend indicates that as summer sets in, the likelihood of enjoying sunny weather rises, peaking in April's 56% and tapering off slightly in August at 34%. After the variable sunniness of June, July's promise of more sun makes it a favored time for outdoor activities and seaside fun, setting the stage for a vibrant summer experience in this coastal city. As summer unfolds, residents and visitors alike can look forward to a significant uptick in sun-soaked days, elevating the overall charm of Swansea during this lively month.

Percentage of Sunny Days in July in Swansea

The chart illustrates the percentage of sunny days in Swansea throughout the year, with July 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 Swansea experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec24%25%31%56%35%27%42%35%29%22%27%22%
Data source: Swansea July chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Swansea in July

In Swansea, the month of July brings a delightful peak in daylight duration, boasting an impressive 16 hours of sunlight. This extended brightness mirrors the gradual increase observed from the early months of the year, where January offers a mere 8 hours. As spring blooms into summer, daylight steadily grows, reaching its zenith in July before gradually subsiding in August to 14 hours. This trend highlights the vibrant transition from spring's awakening to the full embrace of summer, offering residents and visitors ample opportunities to enjoy the beautiful Welsh outdoors. The subsequent decrease in daylight throughout the latter part of the year serves as a gentle reminder of the seasonal ebb and flow, reinforcing Swansea's unique charm across all seasons.

Average Daylight Hours in Swansea for July

The chart illustrates the variation in daylight duration in Swansea throughout the year, with July highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 23m9h 58m11h 55m13h 54m15h 38m16h 32m16h 3m14h 30m12h 35m10h 36m8h 50m7h 53m
Data source: Swansea daylight hours, calculated by summing the hours between sunrise and sunset for each day.

July Winds in Swansea

In July, Swansea experiences gentle breezes, with an average wind speed of 4.1 m/s (9 mph), mirroring the calm conditions of June. This drop in wind intensity contrasts sharply with the early months of the year, where winds often peak above 6 m/s (13 mph), particularly in January and October. As summer unfolds, July maintains a serene atmosphere, suggesting a trend towards more tranquil days that invite outdoor activities. Interestingly, as the season shifts to August, the wind picks up slightly to 5.2 m/s (12 mph), hinting at the varying nature of Swansea's coastal gales throughout the year.

Average July Wind Speed in Swansea

The chart displays monthly wind speed patterns in Swansea, with values for each month shown alongside July's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how July's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec6.57.46.24.75.84.14.1 m/s5.24.76.65.77.3
Data source: Swansea July wind data, generated using information from the Copernicus Climate Change Service.

How July Weather in Swansea Compares to Other Months

The weather in Swansea changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of July's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Swansea and find detailed weather information for every month.

July and January present strikingly different weather conditions. In July, temperatures range from a minimum of 11°C (52°F) to a maximum of 24°C (76°F), with an average of 17°C (62°F), making it the warmest month of the year. The humidity stands at 70%, and while there is some precipitation, averaging 91 mm (3.6 in) over 13 days, the overall feel is much drier compared to winter. In contrast, January experiences much colder temperatures, with a minimum of 0°C (32°F) and a maximum of 14°C (57°F), resulting in an average of only 7°C (45°F). Additionally, January is slightly wetter, with 106 mm (4.2 in) of precipitation over 14 days and higher humidity at 88%. For more detailed insights, you can refer to Swansea weather in January.

When comparing the weather in July and February, significant differences emerge. July boasts much warmer temperatures, with average highs around 24°C (76°F) and lows of 11°C (52°F), creating a pleasant summer climate. In contrast, February experiences much cooler temperatures, averaging only 7°C (45°F) with a maximum of 13°C (55°F) and a minimum dipping to -1°C (30°F). Additionally, February sees more precipitation, totaling 128 mm (5.0 inches) over 17 days, compared to July’s 91 mm (3.6 inches) over 13 days. The humidity is also higher in February at 88%, making it feel damper compared to the more comfortable 70% humidity in July. For more detailed information, check Swansea weather in February.

July and March present contrasting weather patterns, with July offering warmer temperatures and fewer rainy days compared to March. In July, temperatures range from a minimum of 11°C (52°F) to a maximum of 24°C (76°F), with an average of 17°C (62°F) and a humidity level of 70%. Conversely, March sees much cooler temperatures, with lows of -4°C (25°F) and highs reaching only 15°C (59°F), averaging around 8°C (46°F). Additionally, March experiences more precipitation, totaling 114 mm (4.5 in) over 18 days, compared to July's 91 mm (3.6 in) across just 13 days. For a deeper look at March weather, you can visit Swansea weather in March.

When comparing the weather in July and April, a noticeable shift occurs in both temperature and precipitation. July experiences milder conditions with average temperatures ranging from 11°C (52°F) to a pleasant maximum of 24°C (76°F), while April's temperatures are significantly cooler, peaking at 17°C (63°F) with averages around 9°C (49°F). Precipitation levels are higher in July, totaling 91 mm (3.6 in) over 13 days, compared to April's 56 mm (2.2 in) over 9 days. Additionally, July sees lower humidity at 70%, while April exhibits a higher humidity level of 84%. For more detailed insights, check out Swansea weather in April.

In comparing the weather between July and May, July tends to be noticeably warmer, with average temperatures ranging from a minimum of 11°C (52°F) to a maximum of 24°C (76°F), while May offers cooler conditions with temperatures ranging from a minimum of 5°C (40°F) to a maximum of 21°C (70°F). July also experiences slightly more rainfall, totaling 91 mm (3.6 in) over 13 days, compared to May's 79 mm (3.1 in) across 11 days. Additionally, humidity levels are slightly lower in July at 70% compared to May's 80%, which may contribute to a more comfortable feel during the warmer month. For a deeper glimpse into May's climate patterns, you can check Swansea weather in May.

In comparing the weather of June and July, both months experience similar maximum temperatures, with July reaching up to 24°C (76°F) while June also hits the same high. However, July is noticeably warmer on average, with a mean temperature of 17°C (62°F) compared to June's 15°C (59°F). Precipitation levels are fairly consistent, with July seeing 91 mm (3.6 in) over 13 days and June slightly higher at 93 mm (3.6 in) over 15 days. Humidity is also higher in June at 80%, compared to July's 70%. For more detailed information on June's weather, you can refer to Swansea weather in June.

In comparing the weather of July and August, both months exhibit similar average temperatures, hovering around 17°C (62°F) with maximums reaching 24°C (75°F) to 24°C (76°F). However, August brings slightly warmer minimum temperatures, starting at 12°C (53°F) compared to July's 11°C (52°F). Notably, August experiences more precipitation, with 123 mm (4.8 in) over 18 days, contrasted with July's 91 mm (3.6 in) across 13 days. Additionally, humidity levels rise slightly in August to 73%, compared to July's 70%, leading to a more humid atmosphere overall. For more detailed weather information, check out Swansea weather in August.

In July, the weather typically features a mild range of temperatures with a minimum of 11°C (52°F) and an average of 17°C (62°F), reaching a comfortable max of 24°C (76°F). However, this month also sees significant rainfall, with precipitation measuring 91 mm (3.6 in) over 13 days, contributing to a humidity level of 70%.

In contrast, September marks a slight dip in temperatures, showing a minimum of 9°C (48°F) and an average of 15°C (60°F), while maintaining a peak max of 24°C (76°F) similar to July. The month is wetter, with precipitation increasing to 120 mm (4.7 in) over 15 days, and humidity rising to 79%. For a more detailed look at what to expect, check out Swansea weather in September.

In comparison to July, October brings a notable drop in temperatures and a shift in weather patterns. While July boasts a higher average temperature of 17°C (62°F) with a maximum of 24°C (76°F), October sees a cooler average of 13°C (55°F) and peaks at 20°C (68°F). Additionally, October experiences significantly more precipitation, with 184 mm (7.2 in) over 19 days, compared to July's 91 mm (3.6 in) over 13 days. The humidity level also increases in October, reaching 89% from July’s 70%. For more detailed information, check out the Swansea weather in October.

July and November weather in Swansea present a striking contrast. July typically enjoys milder temperatures, with averages around 17°C (62°F) and a maximum of 24°C (76°F), whereas November sees cooler averages of just 10°C (50°F) and highs of 16°C (60°F). Precipitation is more prevalent in November, accumulating 143 mm (5.6 in) over 19 days compared to July's 91 mm (3.6 in) across 13 days. Notably, humidity also rises significantly in November, reaching 90% compared to July's 70%. For more specific details, check out Swansea weather in November.

When comparing the weather in July and December, notable differences emerge. July boasts a milder climate with average temperatures ranging from a minimum of 11°C (52°F) to a maximum of 24°C (76°F), whereas December presents much cooler averages, dipping to a minimum of 2°C (35°F) and peaking at 13°C (55°F). Precipitation also contrasts significantly, with July experiencing 91 mm (3.6 in) of rain over 13 days compared to December's higher total of 184 mm (7.3 in) over 21 days. Additionally, December's humidity levels are higher, averaging 89% compared to July's 70%. For those interested in more details about winter conditions, you can refer to Swansea weather in December.

Compare Swansea's Climate with Cities Worldwide

Conclusion: What to Expect From July Weather in Swansea

July in Swansea presents a delightful departure from the cooler months, offering warmer temperatures that invite outdoor pursuits and beach outings. With an average temperature that peaks significantly, the summer warmth coupled with an ambient humidity level creates a vibrant atmosphere. However, be prepared for occasional rainfall, as July boasts more precipitation days compared to the rest of the year. This blend of sun and sporadic showers is typical for summer, lending a lushness to the Welsh landscape. For a deeper dive into what to expect from Swansea's climate throughout the year, visit Swansea Climate.