Last updated: March 17, 2025
In October, Portsmouth experiences a distinctive shift in weather, characterized by a maximum temperature reaching 20°C (68°F) and an average temperature of 13°C (56°F). As the month progresses, temperatures can drop to a minimum of 4°C (40°F), hinting at the onset of winter. Rainfall plays a significant role, with 117 mm (4.6 in) of precipitation spread across 16 days, resulting in a humidity level averaging a moist 90%. This combination of cooler temperatures and frequent rain creates an atmospheric blend that defines Portsmouth's October climate, encouraging both locals and visitors to embrace the cozy charm of autumn.
As October unfolds in Portsmouth, temperatures begin to reflect the transition into autumn, with a minimum of 4°C (40°F) and a comfortable average of 13°C (56°F). This month marks a noticeable shift from the warmer summer months, as the maximum temperature hovers around 20°C (68°F), inviting pleasant outdoor activities while the leaves start to change. Compared to the preceding months, October's weather is relatively mild, providing a gentle reminder of the chillier days ahead. With the nights growing longer and a crispness in the air, it's the perfect time to enjoy a cozy sweater and warm drinks.
October in Portsmouth marks a significant shift in the weather, showcasing a notable increase in precipitation compared to the preceding months. With an average of 117 mm (4.6 in) of rain falling across 16 days, it becomes the wettest month of the year, as autumn deepens its grip on the region. This uptick in rainfall is particularly striking when contrasted with September’s 57 mm (2.2 in) and reflects a broader trend of increasing precipitation as the year draws to a close. The persistence of rainy days can make October feel particularly gloomy, hinting at the approaching winter while underscoring the importance of warm clothing and cozy indoor activities during this rainy season.
October in Portsmouth, United Kingdom, sees a notable uptick in humidity, reaching 90%, just shy of the winter months where levels peak at 92% in both November and December. This rise follows a trend of declining humidity from the summer months, where July and August experience their lowest levels at 71% and 76%, respectively. As autumn settles in, the shift from the drier summer to the damper fall is palpable, with September already presenting a significant 82% humidity. This pattern not only signals the approach of winter's chill but also enhances the atmospheric richness of this coastal city, making October a transitional month of increased moisture that sets the stage for the dampness to come.
In October, Portsmouth experiences a moderate UV Index of 4, with a recommended burn time of 30 minutes. This month marks a notable shift from the previous summer's high levels, reflecting a gradual decrease in sun exposure as autumn settles in. After enjoying peaks of 8 in June and July, the UV Index begins to moderate, encouraging more cautious outdoor activities. As the days shorten and temperatures cool, both locals and visitors can appreciate the beauty of autumn while being mindful of the sun’s rays. For ongoing updates and insights on UV levels, check out Portsmouth UV Index.
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In October, Portsmouth enjoys a notable 252 hours of sunshine, marking a transition from the sun-drenched summer months. While this is a decline compared to the peak of 423 hours in July, it still outshines the early winter months, where sunshine dwindles to a mere 159 hours by November. The gradual decrease in daylight is part of a natural trend seen throughout the year, with October remaining vibrant as autumn's brilliance paints the city. This month acts as a bridge, offering a last embrace of sunshine before the chill sets in, allowing residents and visitors to relish mild days amidst the falling leaves.
In Portsmouth, the likelihood of sunny weather sees notable fluctuations throughout the year, with October offering a 30% chance of sunshine. This figure sits comfortably above the winter months but below the brighter spring and early summer days. As the year progresses from the bright promises of April’s 58%, we observe a gradual decline, culminating in October's moderate expectancy. However, it is worth noting that even during this transitional month, the possibility of clear skies remains more favorable than in the gray depths of winter, hinting at the potential for pleasant autumnal days amidst the emerging chill.
As October unfolds in Portsmouth, the days begin to shorten, offering about 10 hours of daylight. This decline marks a notable transition from the lush, bright months of summer—when daylight peaked at 16 hours in June—and the gradual tapering into autumn. Following September's modest 12 hours, October's light continues the trend toward the winter months, where daylight dips again to 8 hours in both November and December. While the days grow shorter, they still encapsulate the vibrant hues of fall, making October a unique blend of lingering brightness and impending twilight.
As October graces Portsmouth, the winds begin to stir with a refreshing vigor, averaging 6.2 m/s (14 mph)—a significant uptick from the calmer breezes of summer. This month stands out as a transition point, where the gentle gusts of July and August, which hovered around 4.6 m/s (10 mph) and 5.3 m/s (12 mph) respectively, give way to a more robust dialogue between sea and sky. Notably, October's winds are on par with the briskness of early winter, matching the speeds recorded in January and December. As the leaves turn and the chill creeps in, these spirited winds bring a lively atmosphere, heralding the onset of autumn with every gust that dances through the historic streets of Portsmouth.
The weather in Portsmouth changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of October'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.
October and January showcase distinctly different weather patterns. In October, temperatures range from a cooler minimum of 4°C (40°F) to a mild maximum of 20°C (68°F), with an average of 13°C (56°F). This month receives significant rainfall, totaling 117 mm (4.6 in) over approximately 16 days, while humidity hovers around 90%. In contrast, January is chillier, with temperatures dipping to a minimum of 0°C (32°F) and maxing out at 13°C (56°F), averaging 7°C (44°F). Precipitation is less frequent, averaging 68 mm (2.7 in) over 11 days, and humidity remains comparable at 91%. For more details about January weather, you can visit Portsmouth weather in January.
In October, temperatures range from a chilly 4°C (40°F) to a pleasant 20°C (68°F), with an average of 13°C (56°F). The month experiences significant rainfall, totaling 117 mm (4.6 in) over 16 days, and humidity levels hover around a high 90%. In contrast, February brings colder weather with temperatures dropping to a minimum of -3°C (28°F) and peaking at 13°C (55°F), averaging 7°C (45°F). Precipitation is lower at 75 mm (3.0 in) spread over 12 days, and humidity remains slightly less intense at 89%. For a more detailed comparison of February weather, visit Portsmouth weather in February.
October and March present contrasting weather conditions, reflecting the transition into autumn and spring, respectively. In October, temperatures range from a chilly 4°C (40°F) at night to a pleasant 20°C (68°F) during the day, with an average of 13°C (56°F). The month is notably wet, with 117 mm (4.6 inches) of precipitation spread over 16 days and a high humidity level of 90%. In contrast, March experiences cooler average temperatures, peaking at 14°C (58°F) and dipping down to a low of -3°C (28°F). The month sees less rainfall, totaling 70 mm (2.7 inches) over 13 days, and slightly lower humidity at 86%. For further details on March weather, you can check Portsmouth weather in March.
When comparing the weather in October and April, notable differences emerge. October generally experiences milder temperatures, with an average of 13°C (56°F) and maximums reaching up to 20°C (68°F), while April is cooler, averaging 10°C (50°F) and peaking at 19°C (66°F). Rainfall also varies significantly; October sees about 117 mm (4.6 in) of precipitation over 16 days, in contrast to April's much lighter 32 mm (1.3 in) over just 7 days. Humidity levels are similar, with October at 90% and April slightly lower at 85%. For more detailed information, check out Portsmouth weather in April.
October and May exhibit notable differences in weather patterns. October tends to be cooler, with temperatures ranging from a minimum of 4°C (40°F) to a maximum of 20°C (68°F), and it experiences higher precipitation levels averaging 117 mm (4.6 in) over about 16 days, resulting in a humidity level of 90%. In contrast, May is slightly warmer, with temperatures ranging from 5°C (41°F) to a maximum of 22°C (71°F) and significantly less rain, averaging 56 mm (2.2 in) over 11 days, along with a lower humidity of 79%. For more details on seasonal weather patterns, you can explore Portsmouth weather in May.
In comparing the weather of October and June, we observe distinct contrasts in temperature and precipitation. October experiences cooler temperatures, with a minimum of 4°C (40°F) and an average of 13°C (56°F), while June boasts warmer conditions, starting at a minimum of 9°C (49°F) and averaging 16°C (61°F). Additionally, October is notably wetter, receiving 117 mm (4.6 in) of precipitation over 16 days compared to June's 73 mm (2.9 in) across only 9 days. The humidity in October is higher at 90%, compared to June's 80%, contributing to a more clammy atmosphere in the fall. For a closer look at the specifics of June weather, you can visit Portsmouth weather in June.
In comparing the weather between October and July, there are some notable differences. October experiences cooler temperatures with a minimum of 4°C (40°F), an average of 13°C (56°F), and a maximum of 20°C (68°F), while July boasts a more temperate climate with a minimum of 12°C (53°F), an average of 18°C (65°F), and a maximum of 25°C (78°F). Additionally, October tends to be wetter, receiving 117 mm (4.6 in) of precipitation over 16 days compared to July's 58 mm (2.3 in) over just 11 days. The humidity levels are also higher in October at 90%, compared to 71% in July, contributing to a distinctly different feel in each month. For more detailed information, you can check out Portsmouth weather in July.
October weather exhibits a notable shift compared to August, characterized by cooler temperatures and increased precipitation. While August sees a minimum temperature of 11°C (52°F) and an average of 18°C (64°F), October's temperatures drop significantly to a minimum of 4°C (40°F) and an average of 13°C (56°F). Additionally, October experiences more rainfall, with 117 mm (4.6 in) over 16 days, compared to August's 78 mm (3.1 in) over 12 days. The humidity also rises in October to 90%, making the air feel damp and chilly, whereas August maintains a more comfortable 76% humidity level. For more details, you can check out the Portsmouth weather in August.
In comparing the weather between September and October, we observe a noticeable shift in temperature and precipitation. October experiences cooler temperatures, with a minimum of 4°C (40°F) and a maximum of 20°C (68°F), while September boasts warmer conditions, averaging between 8°C (47°F) and 24°C (76°F). Additionally, October sees a significant increase in precipitation, totaling 117 mm (4.6 in) over 16 days, compared to September's 57 mm (2.2 in) across 10 days. The humidity also rises in October to 90%, up from September's 82%, which contributes to a much wetter and cooler climate as the month progresses. For more details on September's weather patterns, you can visit Portsmouth weather in September.
October tends to be warmer and more humid compared to November, with average temperatures ranging from a minimum of 4°C (40°F) to a maximum of 20°C (68°F). In contrast, November's temperatures drop to an average of 1°C (33°F) to 16°C (61°F), reflecting the onset of winter. While October receives a higher total precipitation of 117 mm (4.6 in) over 16 days, November sees slightly less rainfall at 87 mm (3.4 in) across 15 days. The humidity also increases from 90% in October to 92% in November, indicating a shift towards more damp conditions. For more detailed insights on November weather, check out Portsmouth weather in November.
October and December exhibit notable differences in weather patterns, with October generally feeling warmer. In October, temperatures range from a minimum of 4°C (40°F) to a maximum of 20°C (68°F), averaging around 13°C (56°F), while December sees cooler temperatures, ranging from a minimum of 0°C (33°F) to a maximum of 14°C (57°F), with an average of 8°C (47°F). Both months experience similar levels of precipitation, with October receiving 117 mm (4.6 in) and December slightly higher at 118 mm (4.7 in), each accumulating rainfall over 16 days. Humidity levels are slightly elevated in December at 92%, compared to 90% in October. For a closer look at the conditions during December, you can check out Portsmouth weather in December.
As October rolls in, Portsmouth experiences a distinct shift in its weather pattern compared to the warmer summer months. With temperatures averaging a cooler 13°C and frequent rainy spells, this month brings a refreshing contrast to the typically dry and sunny conditions of September. Humidity soars to around 90%, creating a damp atmosphere that marks the transition into autumn. The increased precipitation, with rain on nearly half the days, encourages the vibrant colors of the changing foliage. For more insights on how these patterns affect seasonal activities, explore Portsmouth Climate.