Last updated: February 24, 2025
October in Portsmouth, United States, brings a delightful mix of autumnal charm and intriguing weather patterns. With maximum temperatures reaching a comfortable 25°C (78°F) and a pleasant average of 13°C (56°F), this month is characterized by a crispness in the air. However, the minimum temperature can drop to 1°C (34°F), reminding us that winter is just around the corner. Rainfall is another defining aspect, as 142 mm (5.6 in) of precipitation falls over 11 days, contributing to the month’s vibrant foliage and lush landscapes. With a humidity level averaging 78%, October in Portsmouth is a season of contrasts, perfect for enjoying the beauty of fall while staying prepared for sudden showers.
In October, Portsmouth experiences a delightful shift as it transitions fully into autumn. With minimum temperatures around 1°C (34°F), the crispness of the season begins to set in, while the average temperature hovers around a comfortable 13°C (56°F). The days still offer warmth, peaking at a pleasant 25°C (78°F), inviting residents and visitors alike to enjoy outdoor activities amidst the vibrant fall foliage. This month typically represents a sweet spot in Portsmouth's climate, blending the lingering warmth of summer with the refreshing chill of impending winter, making it an ideal time for cozy gatherings and scenic explorations.
In October, Portsmouth experiences a significant uptick in precipitation, accumulating around 142 mm (5.6 in) across 11 days of rainfall. This marks a noteworthy increase compared to the preceding months, reflecting the transition into the more temperate and often wetter fall season. Following the generally drier summer, where August received just 71 mm (2.8 in), October brings a refreshing shift that prepares the landscape for winter's approach. Interestingly, this month mirrors the rainfall patterns seen in April, both boasting the same precipitation total. As autumn deepens, residents can expect the sights and sounds of autumn rain, making it a pivotal month for both nature and daily life in Portsmouth.
In October, Portsmouth experiences a notable uptick in humidity, settling at 78%—a refreshing shift after the drier summer months. Following a gradual decline from 86% in January to its lowest point of 66% in August, the return of moisture in October heralds the onset of fall. As temperatures drop and the air becomes crisper, this increase signifies a transition that leads into the wetter months ahead, with humidity rising again in November to 84%. The pattern illustrates how seasonal changes affect the region's atmospheric moisture, creating a dynamic and ever-changing environment.
As October unfolds in Portsmouth, the UV Index settles at a moderate level of 5, which is a noticeable drop from the peak summer months. This offers a more forgiving environment than the very high levels of 9 and 10 experienced from May through August, where sunburn could occur in as little as 15 minutes. With burn time extending to 30 minutes in October, it's essential to remain mindful of sun exposure, particularly during midday hours. This transitional month signals a shift toward lower UV levels, paving the way for the cooler months ahead, when values further decrease to a low of 2 in December. For more insights on UV exposure in your area, check out Portsmouth UV Index.
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In Portsmouth, October brings a delightful transition as the sunshine hours dip to 221. This month marks a shift from the peak summer days of July and August, which bask in over 330 hours of bright light, showcasing the region's vibrant warmth. While the days grow shorter, October still offers a generous amount of sunshine, significantly more than the chill of November's 193 hours. As temperatures cool, autumn leaves begin their breathtaking display, inviting residents and visitors alike to enjoy the crisp air and golden hues of fall, all under the inviting embrace of soothing sunlight.
In October, Portsmouth residents can expect a moderate chance of sunny weather, with the likelihood hovering around 38%. This figure aligns closely with the earlier months of the year, such as April and May, where the chances also float in the low to mid-40% range. Interestingly, as the year progresses into late autumn, there is a noticeable uptick in sunny likelihood during November at 54%, suggesting that while October may be a transitional month, the sun may make a more frequent appearance as the season transitions toward winter. Overall, October offers a blend of crisp air and potential sunny days, perfect for enjoying the autumn scenery.
As October arrives in Portsmouth, daylight begins to wane, with the sun gracing the skies for 10 hours each day. This decrease marks a transition from the longer, sun-soaked days of summer, which peaked at 15 hours in June, to the more subdued light of late fall and winter. The gradual decline from a summer zenith shows nature's rhythm, with daylight hours decreasing sharply as the year progresses. Compared to September's 12 hours, October's shorter days hint at the approaching winter months, where daylight further shrinks to just 9 hours in both November and December. Embracing this shift allows Portsmouth residents to savor the rich autumn colors and the cozy atmosphere that shorter days bring.
As October sweeps into Portsmouth, it brings with it a refreshing average wind speed of 4.4 m/s (10 mph), marking a subtle uptick from the summer’s calm breezes. This shift is noticeable when compared to the July and August months, where winds dwindled to their lowest at 3.5 m/s (8 mph) and 3.3 m/s (7 mph), respectively. The rise in wind speed signals a transition into the cooler fall weather, reminiscent of earlier spring days when winds reached 5.2 m/s (12 mph) in March. As the year progresses toward winter, the wind nearly stabilizes, reflecting November's average of 4.6 m/s (10 mph). Overall, October serves as a bridge, blending the gentle whispers of summer with the brisk whispers of the approaching cold, invigorating the atmosphere in 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 present stark contrasts in weather. In October, temperatures range from a chilly 1°C (34°F) at night to a pleasant 25°C (78°F) during the day, with an average of 13°C (56°F). This month experiences considerable rainfall, with 142 mm (5.6 in) spread over 11 days, and humidity levels sit at around 78%. In contrast, January is much colder, with temperatures dropping to a minimum of -19°C (-2°F) and averaging -1°C (30°F), peaking at 17°C (64°F). Despite having less precipitation, at 79 mm (3.1 in) over 8 days, January's humidity is slightly higher at 86%. For a more detailed look at January weather, you can check Portsmouth weather in January.
October and February present stark contrasts in weather. In October, temperatures range from a chilly 1°C (34°F) at night to a pleasant 25°C (78°F) during the day, with an average of 13°C (56°F). Rainfall is notable, with around 142 mm (5.6 in) over 11 days and humidity averaging 78%. In contrast, February is much colder, with minimum temperatures plunging to -16°C (4°F) and an average of 0°C (32°F), peaking at just 17°C (64°F). Although it experiences slightly less precipitation at 98 mm (3.9 in) over 11 days, February's humidity is higher at 84%. For those interested in more details about February weather, check out Portsmouth weather in February.
October and March present quite contrasting weather scenarios. In October, temperatures range from a minimum of 1°C (34°F) to a maximum of 25°C (78°F), with an average of 13°C (56°F), while March experiences much colder conditions, with temperatures varying from a minimum of -14°C (8°F) to a maximum of 17°C (63°F), and an average of just 2°C (36°F). Precipitation is more abundant in October, totaling 142 mm (5.6 in) over 11 days, compared to March's 94 mm (3.7 in) spread over 10 days. Furthermore, October has slightly lower humidity at 78%, while March sees a higher level at 82%. For more detailed information, you can check Portsmouth weather in March.
When comparing the weather in October and April, we can observe some interesting differences and similarities. October typically features a milder average temperature of 13°C (56°F) with a maximum of 25°C (78°F) and a minimum of 1°C (34°F), while April's average temperature is cooler at 8°C (46°F), with the range from a minimum of -2°C (29°F) to a maximum of 24°C (76°F). Both months experience similar levels of precipitation, around 142-143 mm (5.6 in), but April tends to have slightly more rainy days, totaling 13 compared to October's 11. Humidity levels are also comparable, with October sitting at 78% and April at 80%. For a more detailed look at April weather, check out Portsmouth weather in April.
When comparing the weather in October and May, both months feature a similar average temperature of around 13°C (56°F), but they differ significantly in their temperature ranges. October sees cooler days with minimum temperatures dropping to 1°C (34°F) and a maximum of 25°C (78°F), while May has slightly warmer temperatures, with a minimum of 2°C (37°F) and a maximum of 27°C (82°F). Precipitation levels also vary, with October experiencing more rain at 142 mm (5.6 in) compared to May's 83 mm (3.3 in), though both months have precipitation on around 11 days. Additionally, October has a higher humidity level at 78% compared to May's 72%. For more details on May's weather, visit Portsmouth weather in May.
When comparing October and June weather, notable differences emerge in temperature and precipitation. October experiences a wider temperature range, with minimums dropping to 1°C (34°F) and maximums reaching 25°C (78°F), while the average temperature sits at 13°C (56°F). In contrast, June is generally warmer, with minimum temperatures of 8°C (47°F), maximums up to 30°C (86°F), and an average of 18°C (65°F). Precipitation is more prominent in October, totaling 142 mm (5.6 in) over 11 days, compared to June's 88 mm (3.5 in) over 10 days. Additionally, October has a higher humidity level of 78%, compared to June's 72%. For a closer look at the weather in June, visit Portsmouth weather in June.
In comparison to July, October exhibits a broader range of temperatures, with minimums dropping to 1°C (34°F) and maximums reaching 25°C (78°F), which creates a cooler atmosphere. July, on the other hand, enjoys warmer temperatures ranging from a minimum of 13°C (56°F) to a maximum of 31°C (88°F). Additionally, October experiences more precipitation, with an average of 142 mm (5.6 in) over 11 days, contrasting with July's 123 mm (4.8 in) across 12 days. Furthermore, humidity levels are higher in October at 78%, compared to 67% in July, contributing to a distinctly different feel in the air. For more detailed insights, you can check Portsmouth weather in July.
October brings a noticeable shift in weather compared to August. The temperatures in October range from a chilly minimum of 1°C (34°F) to a comfortable maximum of 25°C (78°F), resulting in an average of 13°C (56°F). This is a marked decrease from August, which enjoys warmer temperatures with a minimum of 13°C (55°F) and a maximum of 31°C (88°F), averaging 22°C (71°F). Additionally, October experiences significantly more precipitation, with 142 mm (5.6 inches) over 11 days, compared to 71 mm (2.8 inches) over 9 days in August. The humidity also rises in October to 78%, up from August’s 66%, making the air feel quite different. For a detailed comparison of August weather specifically, you can visit Portsmouth weather in August.
In comparing the weather of October and September, October presents a significant drop in temperature, with average readings of 13°C (56°F) compared to September's warmer 18°C (65°F). While September enjoys milder conditions, featuring maximum temperatures that reach up to 30°C (86°F), October's peak temperature is notably lower at 25°C (78°F). Precipitation in October is also more pronounced, totaling 142 mm (5.6 in) over 11 days, compared to September's 78 mm (3.1 in) spread over 8 days. Additionally, October's humidity is higher at 78%, while September remains slightly lower at 71%. For a more detailed look at September's climate, you can visit Portsmouth weather in September.
October and November present a notable shift in weather patterns. In October, temperatures range from a minimum of 1°C (34°F) to a maximum of 25°C (78°F), with an average of 13°C (56°F) and higher humidity levels at 78%. Precipitation is also prominent, with 142 mm (5.6 in) recorded over 11 days. By November, the temperatures drop significantly, featuring a minimum of -12°C (11°F) and an average low of 6°C (43°F), while the maximum temperature decreases to 20°C (69°F). Despite less rainfall, totaling 108 mm (4.3 in) over the same number of days, humidity rises to 84%. For a detailed look at what to expect, check out Portsmouth weather in November.
October and December present markedly different weather patterns. In October, temperatures typically range from a pleasant minimum of 1°C (34°F) to a maximum of 25°C (78°F), with an average of 13°C (56°F). The month experiences considerable precipitation at 142 mm (5.6 in) over about 11 days, alongside a humidity level of 78%. In contrast, December brings a much chillier climate, with temperatures dipping significantly, featuring a minimum of -19°C (-1°F) and an average temperature of just 1°C (34°F). The maximum temperature reaches a milder 15°C (59°F), while precipitation remains slightly lower at 133 mm (5.2 in) over around 10 days, and humidity rises to 81%. For more detailed insights, check out Portsmouth weather in December.
In October, Portsmouth experiences a notable transition as the warmth of summer gives way to the crispness of fall. With an average temperature of 13°C, the month presents a refreshing chill, occasionally dipping as low as 1°C at night. Rainfall is more common this time of year, with approximately 142 mm spread over 11 days, contributing to the 78% humidity that envelops the region. This blend of cooler temps and increased precipitation makes October distinct, heralding the vibrant autumn foliage and brisk walks through the picturesque streets. For further insights into the weather trends throughout the year, visit Portsmouth Climate.