Last updated: February 24, 2025
October in Portland, Oregon, showcases a dramatic shift in climate as fall takes hold. With maximum temperatures peaking at 26°C (79°F) and an average of 12°C (53°F), the month offers a refreshing mix of warm and cool days. However, early chill is felt as temperatures can drop to a brisk -2°C (29°F) at night. Rainfall is common, with 105 mm (4.1 in) spread across approximately 12 days, contributing to the city's characteristic lushness. Humidity levels hover at a significant 81%, adding to the atmospheric richness of Portland's enchanting autumn scenery. Perfect for cozy sweaters and warm drinks, October invites locals and visitors alike to relish in its vibrant seasonal charm.
In October, Portland experiences a notable transition in its temperatures as autumn deepens, with minimums dipping to -2°C (29°F). The average temperature settles at a comfortable 12°C (53°F), making it a refreshing time of year. Daily highs can reach a pleasant 26°C (79°F), allowing for plenty of outdoor activities amidst the vibrant fall foliage. This month encapsulates the essence of seasonal change, as the city moves from the lingering warmth of September to the cooler embrace of November, highlighting a steady decline in temperature that prepares the region for winter. Whether you're enjoying a walk in the crisp air or savoring the colorful landscapes, October in Portland is a beautiful blend of warmth and chill.
October in Portland marks a significant shift in the weather pattern, with precipitation increasing to 105 mm (4.1 in) over 12 rainy days. This is a notable rise from the drier summer months, particularly July and August, when the city experienced merely a trace of rain. As autumn sets in, October's rainfall acts as a precursor to the wetter months ahead, preparing the region for the heftier deluges seen in November and December. While less rainy than January and February, October seamlessly blends the lingering warmth of fall with increasing moisture, highlighting Portland's characteristic transition into its lush, green season.
As October rolls into Portland, the city experiences a humidity level of 81%, which marks a slight uptick from the previous month’s 71%. This rise signals a shift towards the wetter months, as humidity begins to climb again after the relative dryness of late summer. Compared to earlier months like July and August, where humidity dipped to around 82% and 74% respectively, October’s levels reflect the onset of autumn's cooler, more moisture-laden air. As the year progresses into November and December, humidity levels surge to 87%, making October a transitional month where the crisp fall air starts to invite the more humid conditions of winter.
As October rolls into Portland, the UV Index shows a noticeable shift towards moderate levels, registering at 5. This change signals a drop from the high summer months, where indices peaked at 10, indicating very high exposure levels during July and June. With a burn time of 30 minutes, October’s UV exposure is manageable, but it’s crucial to remain vigilant about skin protection when outdoors. As the days grow shorter and the sun's intensity diminishes, this transition reminds us of the importance of adjusting our sun safety routines. For more insights on UV exposure throughout the year, check out Portland UV Index.
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In October, Portland experiences a delightful transition, basking in 211 hours of sunshine that marks a subtle decline from the vibrant summer months, yet remains significantly brighter than the winter ahead. Following the summer peak in July, where residents enjoyed an impressive 374 hours of sunshine, October offers a cozy blend of crisp air and mellow sunlight, reminiscent of autumn's charm. This month stands as a gentle reminder of summer's warmth while hinting at the shorter days to come, as the city shifts from the lively brightness of August and September to the more subdued glow of the late fall months. With an engaging mix of golden leaves and abundant sunshine, October invites Portlanders to relish the last whispers of summer before winter’s approach.
As October rolls into Portland, the chance of sunny weather stands at 30%, marking a noticeable decline from the peak summer months when sunshine graced the city over 60% of the time. This transitional period sees a shift from the vibrant warmth of July and August, which boasted sunny days at 74% and 57%, respectively, to a crisp fall atmosphere where clouds begin to dominate. Notably, the chances of sunshine in October are nearly half of the pleasant 54% found in April, hinting at the seasonal change and the approach of the gray winter skies. Thus, while there are still opportunities to enjoy some sunny days amid the autumn leaves, Portlanders should prepare for a more overcast experience as they embrace the beauty of the fall season.
As autumn unfolds in Portland during October, the city experiences a noticeable reduction in daylight, with only 10 hours of sunlight each day. This marks a decline from the summer months, where daylight peaked at 15 hours in June and July, creating long, vibrant evenings. The gradual shortening of days starts as early as September, dropping to 12 hours, and continues its descent into October, echoing the rhythm of the changing seasons. As we approach winter, the trend downwards persists, with daylight reaching just 8 hours by December, reminding us of nature's cycle and the cozy, reflective moments that shorter days often inspire.
As October ushers in a shift in the seasons, Portland experiences a subtle uptick in wind speed, averaging 2.7 m/s (6 mph). This gentle breeze marks a transition from the more serene winds of late summer, which lingered around 2.2 to 2.4 m/s (5 mph), to a slightly brisker atmosphere that hints at the approaching winter months. The gradual increase in wind speed from September to October mirrors a broader trend, where the autumn months bring more lively gusts compared to the calmer summer days. November follows closely with an average of 2.8 m/s (6 mph), continuing this refreshing charge of air. The interplay between the cooling temperatures and rising winds infuses the city with an invigorating essence, inviting residents and visitors to embrace the beautiful, breezy fall days.
The weather in Portland 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 Portland and find detailed weather information for every month.
In October, the weather is generally milder, with temperatures ranging from a chilly minimum of -2°C (29°F) to a pleasant maximum of 26°C (79°F), while the average temperature sits at around 12°C (53°F). The month experiences around 105 mm (4.1 in) of precipitation over approximately 12 days, contributing to a humidity level of 81%. In contrast, January brings colder conditions, with temperatures dipping to a minimum of -14°C (7°F) and peaking at 15°C (59°F), leading to an average of 5°C (42°F). January sees a higher precipitation level of 163 mm (6.4 in) spread across 17 days and an increased humidity of 85%. For more detailed information, check out Portland weather in January.
When comparing October and February weather, there are notable differences in temperature and precipitation patterns. October sees a wider temperature range, with minimums of -2°C (29°F) and maximums reaching up to 26°C (79°F), resulting in a comfortable average of 12°C (53°F). In contrast, February is generally colder, with minimum temperatures dropping to -7°C (19°F) and an average of only 5°C (41°F), peaking at 17°C (63°F). Precipitation is higher in February, totaling 172 mm (6.8 in) over 19 days, compared to October's 105 mm (4.1 in) over 12 days. Additionally, both months experience high humidity levels, with October at 81% and February slightly higher at 84%. For more specifics about February weather, check out Portland weather in February.
When comparing the weather in October and March, October typically experiences milder temperatures with an average of 12°C (53°F), while March has a cooler average of 8°C (46°F). The maximum temperatures are relatively similar, reaching up to 26°C (79°F) in October and 24°C (75°F) in March. However, March tends to have slightly more precipitation, totaling 135 mm (5.3 in) over 17 days compared to October's 105 mm (4.1 in) over 12 days. Humidity levels are also higher in March at 85%, compared to 81% in October, contributing to a generally more damp atmosphere. For further details on the weather in March, check out Portland weather in March.
When comparing the weather in October and April, both months exhibit a range of temperatures and similar humidity levels, but with distinct characteristics. In October, temperatures can swing from a chilly minimum of -2°C (29°F) to a comfortable maximum of 26°C (79°F), while the average temperature hovers around 12°C (53°F). Conversely, April's temperatures range from a slightly warmer minimum of -1°C (31°F) to a peak of 29°C (84°F), with an average of 11°C (51°F).
Rainfall is also notable in both months, with October receiving 105 mm (4.1 in) of precipitation over 12 days, whereas April sees a bit more rain at 117 mm (4.6 in) across 15 days. The humidity levels are comparable, with October at 81% and April slightly higher at 83%. For more detailed insights, you can visit Portland weather in April.
When comparing the weather in October and May, notable differences emerge in temperature and precipitation. October experiences cooler temperatures, ranging from a minimum of -2°C (29°F) to a maximum of 26°C (79°F), with an average of 12°C (53°F). In contrast, May is milder, with temperatures starting at a minimum of 2°C (36°F) and reaching up to 32°C (90°F), averaging 14°C (58°F). Precipitation is higher in October, totaling 105 mm (4.1 in) over 12 days, compared to May's 58 mm (2.3 in) over 10 days. Humidity levels are also relatively similar, with October at 81% and May slightly higher at 83%. For more details, check out Portland weather in May.
When comparing the weather of October and June, notable differences emerge. October experiences a wider temperature range, with minimums dipping as low as -2°C (29°F) and maximums reaching up to 26°C (79°F). In contrast, June maintains a milder range, with temperatures starting at 6°C (43°F) and peaking at around 47°C (118°F). Additionally, October is significantly wetter, receiving 105 mm (4.1 in) of precipitation over approximately 12 days, compared to June's 46 mm (1.8 in) across 8 days. Humidity levels in both months are quite similar, hovering around 81% in October and 83% in June. For more detailed insights, you can check out Portland weather in June.
The weather in October contrasts significantly with July in terms of temperature and precipitation. In October, temperatures can drop to a minimum of -2°C (29°F), with an average of 12°C (53°F) and a maximum of 26°C (79°F). This month also experiences more precipitation, averaging 105 mm (4.1 in) over 12 days, resulting in a relatively humid atmosphere at 81%. In contrast, July offers milder conditions, with a minimum temperature of 9°C (49°F), an average of 21°C (69°F), and a maximum soaring to 37°C (99°F). July is much drier, with only 6 mm (0.2 in) of rain on just 1 day and slightly higher humidity at 82%. For more details on the specifics of July weather, check out Portland weather in July.
October and August present stark contrasts in weather. In October, temperatures can dip as low as -2°C (29°F), with an average of 12°C (53°F) and a maximum of 26°C (79°F). The month is also characterized by greater precipitation, with 105 mm (4.1 in) recorded over approximately 12 days, contributing to a higher humidity level of 81%. In comparison, August offers much warmer conditions, with minimum temperatures around 9°C (48°F) and averages peaking at 21°C (70°F), while the maximum can soar to a sweltering 40°C (104°F). Notably, August experiences significantly less rainfall, totaling only 8 mm (0.3 in) over just 2 days, alongside lower humidity levels of 74%. For a detailed look at August's climate, check out Portland weather in August.
In comparing the weather of October to September, we observe notable shifts in temperature and precipitation patterns. October experiences a broader temperature range, with a minimum of -2°C (29°F) and a maximum of 26°C (79°F), leading to an average of 12°C (53°F). In contrast, September offers warmer conditions, highlighted by a minimum of 6°C (42°F) and a peak of 35°C (95°F) with an average temperature of 18°C (64°F). Additionally, October sees an increase in precipitation, receiving 105 mm (4.1 in) over 12 days, compared to September's 62 mm (2.4 in) over 8 days. Humidity levels also rise in October to 81%, up from 71% in September. For a closer look at September's weather specifics, you can visit Portland weather in September.
October weather features a wider temperature range, with minimums reaching -2°C (29°F) and a maximum of 26°C (79°F), along with an average of 12°C (53°F). In contrast, November sees cooler temperatures overall, with lows dropping to -5°C (24°F) and a maximum of 19°C (67°F), resulting in an average temperature of 8°C (47°F). Additionally, November experiences more precipitation, totaling 155 mm (6.1 in) over 18 days compared to October's 105 mm (4.1 in) over 12 days, and higher humidity levels at 87% versus 81% in October. For more detailed insights, you can check Portland weather in November.
October and December present notably different weather conditions. October enjoys a warmer temperature range, with minimums around -2°C (29°F) and maximums reaching up to 26°C (79°F), yielding a pleasant average of 12°C (53°F). Precipitation in October totals 105 mm (4.1 in) over approximately 12 days, accompanied by a relatively lower humidity of 81%. In contrast, December experiences cooler temperatures, with minimums dropping to -5°C (24°F) and a much chillier average of 5°C (41°F). This month sees increased precipitation levels of 183 mm (7.2 in) over about 19 days, along with higher humidity at 87%. For more specific insights into the conditions, check out Portland weather in December.
As October unfolds in Portland, the city experiences a notable shift in weather patterns, setting it apart from the preceding summer months. Temperatures begin to dip, presenting a refreshing contrast with daytime highs reaching up to 26°C (79°F) while cooler evenings bring the average down to a crisp 12°C (53°F). Rain becomes a frequent visitor, with vibrant autumn foliage matched by an increase in precipitation, totaling around 105 mm over 12 days. This month also ushers in a higher humidity level, creating a cozy atmosphere that signals the approaching winter. For more insights into how October's weather compares to the rest of the year, visit Portland Climate.