Last updated: February 24, 2025
January in Portland, United States brings a cool atmosphere with average temperatures hovering around -2°C (28°F), while daytime highs reach up to 12°C (54°F). The month is characterized by its chilly lows, plunging to a minimum of -19°C (-2°F), creating a brisk winter environment. Rain is a consistent feature, with 97 mm (3.8 in) of precipitation spread across 9 days, contributing to the city's characteristic muggy feel, with humidity levels at a notable 86%. This combination of cool temperatures and frequent rain shapes January as a quintessential winter month in Portland.
In January, temperatures in Portland exhibit a chilly demeanor, with lows dipping as low as -19°C (-2°F) and a persistent average near -2°C (28°F). The highs reach up to 12°C (54°F), but the cool climate sets the tone for the month. As winter transitions to spring, February slightly warms, yet still maintains a similar range, with temperatures remaining frosty, especially at night. By March, a gradual thaw begins, heralding the season's change, as average temperatures inch up to 1°C (34°F). The trend continues into April, where we see a significant shift with averages rising to 6°C (43°F), and by May, the city embraces a more temperate climate, marked by lows of 2°C (36°F) and a welcoming average of 11°C (52°F). This gradual climb through the months showcases Portland's resilience through winter, ultimately leading to the pleasant warmth of summer.
In January, Portland experiences an average precipitation of 97 mm (3.8 in) over 9 days, setting the stage for a typically wet Pacific Northwest winter. This month marks a slight dip compared to February's 103 mm (4.1 in), which sees an additional day of rain. As the season transitions, April brings a noticeable increase in rainfall, with an average of 149 mm (5.9 in) over 13 days, highlighting the spring's tendency to be particularly soggy. Interestingly, summer months like July, with 123 mm (4.9 in), show that even during the warmer season, Portland can experience significant precipitation. Overall, while January's rainfall is representative of winter, it foreshadows the wetter conditions to come as the year progresses, particularly in the spring and fall.
In January, Portland experiences a notable high in humidity at 86%, setting the tone for the winter months. This level of moisture gradually decreases, with February and March registering at 84% and 82% respectively, leading to a slight sigh of relief as spring approaches. As the year progresses, the humidity continues to decline, reaching its lowest point in July and August at 67% and 66%. However, as autumn settles in, values begin to rise again, with October climbing back to 78% and November holding steady at 84%. By December, humidity averages 81%, reflecting the cyclical nature of Portland's weather, where winter ups the ante with its trademark dampness before transitioning to more moderate conditions in the warmer months.
In January, Portland experiences a low UV Index of 2, allowing for a generous burn time of 45 minutes under the sun. This trend of lower UV exposure continues into December, where the UV Index remains the same, offering safe outdoor activities for longer durations. However, as the calendar flips to February, a noticeable increase occurs with the UV Index rising to 4, indicative of moderate exposure levels. This upward trend escalates through the spring and summer months, reaching a peak of 10 in June when the risk intensifies to very high, shortening burn time to just 15 minutes. By the end of summer, the indices begin to decline gradually, with September showcasing a high index of 7 before reverting to more moderate levels in the fall. This seasonal fluctuation emphasizes the importance of staying aware of UV exposure throughout the year. For more detailed insights, check the Portland UV Index.
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In Portland, January starts the year with a modest 148 hours of sunshine, setting a cool, reflective tone as the city transitions from the winter months. As February unfolds, sunshine increases to 182 hours, hinting at the gradual arrival of spring. This trend accelerates through March and April, where 256 and 244 hours respectively bathe the city in light, invigorating local outdoor life. The real turning point arrives in May, with 294 hours that signal the onset of summer adventures. The sunniest months peak in July and August, boasting 333 and 336 hours respectively, offering endless opportunities for exploration and relaxation. Even as summer fades into fall, September still holds onto 288 hours, while October begins a steady decline with 216 hours. The year wraps up with November and December's softer sunlight, at 190 and 174 hours, echoing the cycle of seasons and the resilience of the Portland spirit.
In Portland, January greets residents with a 39% chance of sunny weather, a notable start to the year that hints at the promise of brighter days ahead. This percentage is relatively higher compared to the subsequent months of February and April, both hovering around the 34% to 36% mark, suggesting a slight dip in sunshine as winter deepens. However, compared to the sunnier March with a significant 61%, it's clear that January sets the stage for a transition toward brighter spring days. As the year progresses, the chances of sunshine tend to fluctuate, with a notable rise in November, which experiences a surprising 54% chance of sun. Overall, while the beginning of the year may still hold onto the winter gloom, January's relatively favorable forecast hints at a gradual shift towards the more radiant months to come.
In January, Portland experiences a modest 9 hours of daylight, marking the depth of winter. As the month unfolds, the days gradually lengthen, reaching a delightful 10 hours in February. By March, the daylight extends to 11 hours, heralding the arrival of spring. The increase becomes even more pronounced in April, with 13 hours of sunshine fueling growth and blossoming landscapes. This trend continues into May and June, where daylight peaks at 14 and 15 hours, respectively, providing ample opportunities for outdoor activities under the vibrant summer sun. As summer wanes in July, daylight remains abundant but begins to taper off, recorded at 15 hours. The decline continues in August with 13 hours, followed by gradual reductions in September and October, where daylight dwindles to 12 and 10 hours. As the year closes in November, daylight returns to 9 hours, and ultimately descends to 8 hours in December, completing the seasonal cycle and paving the way for the next year's awakening.
In January, Portland experiences an average wind speed of 4.8 m/s (11 mph), setting the stage for a brisk winter ambiance that lingers through the month. As the year progresses, there’s a subtle dip in wind intensity, with February matching January's speed before gradually increasing in March to 5.3 m/s (12 mph). Following this peak, the winds begin to mellow, consistently tapering off to 3.3 m/s (7 mph) by August. Notably, the transition from summer to autumn sees a slight resurgence, with speeds hovering around 4.0 m/s (9 mph) in the fall months. Ultimately, the year closes with winter’s return, bringing back the 4.8 m/s (11 mph) winds of January. This cyclical pattern reflects a gentle ebb and flow, giving inhabitants a taste of both brisk winter breezes and the calmer air of summer.
The weather in Portland changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of January'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 comparing the weather between January and February, both months display similar average temperatures, with January having a minimum of -19°C and a maximum of 12°C, while February ranges from -17°C to 14°C. Interestingly, February tends to have slightly more precipitation at 103 mm compared to January's 97 mm, although both months experience nearly the same number of wet days. Additionally, humidity levels remain relatively high, with January at 86% and February slightly lower at 84%. For a more detailed look at February's weather specifics, you can visit Portland weather in February.
In January, temperatures can plunge down to a minimum of -19°C (-2°F), with an average of -2°C (28°F) and a maximum reaching 12°C (54°F). The month experiences a relatively high humidity level of 86% and sees about 97 mm (3.8 in) of precipitation over 9 days. In contrast, March shows signs of warming, with minimum temperatures around -15°C (6°F) and an average rise to 1°C (34°F), peaking at 13°C (56°F). Despite having slightly less precipitation at 91 mm (3.6 in) over the same number of days, March has lower humidity at 82%. For more detailed insights into weather conditions, you can check Portland weather in March.
January weather in Portland features colder temperatures, with average highs only reaching up to 12°C (54°F) and average lows dropping to a chilling -19°C (-2°F). It experiences significant precipitation, with around 97 mm (3.8 in) falling over 9 days, and the humidity hovers at a high 86%. In contrast, April marks the rise of temperatures, with averages between min -3°C (27°F) and max 18°C (65°F), showcasing a shift towards milder conditions. While April sees greater precipitation at 149 mm (5.9 in) over 13 days, the humidity level is slightly lower at 80%. For a more detailed look at the weather patterns in April, visit Portland weather in April.
In January, the weather is defined by its frigid temperatures, with minimums plummeting to -19°C (-2°F) and an average of -2°C (28°F), making it one of the coldest months of the year. In stark contrast, May ushers in significantly warmer conditions, featuring average temperatures around 11°C (52°F) and highs reaching 24°C (76°F). While both months experience similar precipitation levels, with January at 97 mm (3.8 in) and May at 94 mm (3.7 in), January is clouded with higher humidity at 86%, compared to May's 72%. For more detailed insights about the weather in May, check out Portland weather in May.
January and June showcase stark contrasts in weather. In January, temperatures plummet, with averages around -2°C (28°F) and frigid lows dipping to -19°C (-2°F), while highs reach a modest 12°C (54°F). The month experiences significant humidity at 86% and receives 97 mm (3.8 in) of precipitation over 9 days. In contrast, June ushers in a warm embrace with average temperatures around 17°C (62°F) and highs reaching up to 28°C (83°F), with lows hovering at 8°C (47°F). Although June sees slightly less precipitation at 80 mm (3.2 in) over the same number of days, the humidity drops to a more comfortable 72%. For more detailed insights into the June climate, you can check out Portland weather in June.
January and July weather in Portland contrast sharply, showcasing the region's seasonal diversity. In January, temperatures can plunge to a minimum of -19°C (–2°F), with an average of -2°C (28°F) and a maximum reaching 12°C (54°F). The month is characterized by high humidity at 86% and considerable precipitation of 97 mm (3.8 in) over 9 days. In stark contrast, July boasts a much milder climate, with temperatures ranging from a minimum of 13°C (56°F) to an average of 20°C (68°F) and a pleasant maximum of 28°C (83°F). Although July experiences slightly more rainfall at 123 mm (4.9 in) over 12 days, the humidity decreases to a more comfortable 67%. To explore more about Portland's weather in July, you can visit Portland weather in July.
In January, temperatures can plunge to a minimum of -19°C (-2°F) and average around -2°C (28°F), with maximums reaching only 12°C (54°F). The month experiences high humidity at 86% and sees around 97 mm (3.8 in) of precipitation over 9 days. In stark contrast, August offers much milder conditions, with minimum temperatures around 14°C (57°F) and average highs of 20°C (69°F), peaking at 28°C (82°F). The summer month experiences considerably less precipitation at 75 mm (3.0 in) over the same number of days but boasts a lower humidity level of 66%. For more details on the weather specifics in August, you can visit Portland weather in August.
January and September present strikingly different weather conditions. In January, temperatures can plunge to a minimum of -19°C (-2°F), with an average of -2°C (28°F) and a maximum of 12°C (54°F), making it one of the coldest months of the year. In contrast, September showcases a milder climate with temperatures ranging from a minimum of 8°C (46°F) to a pleasant maximum of 26°C (79°F), resulting in an average of 17°C (63°F). Additionally, January experiences heavier precipitation, accumulating 97 mm (3.8 in) over about nine days, compared to September's 77 mm (3.0 in) over eight days. The humidity also differs significantly, with January averaging 86% compared to September’s 71%. For more details on September weather, check out Portland weather in September.
In January, temperatures in Portland can drop to a chilling minimum of -19°C (-2°F), with an average of -2°C (28°F) and a maximum of 12°C (54°F). The month experiences significant precipitation, totaling 97 mm (3.8 in) over about nine days, accompanied by high humidity levels of 86%. In contrast, October offers a much milder climate, with minimum temperatures around 1°C (34°F), an average of 12°C (54°F), and a pleasant maximum of 21°C (71°F). Although October sees more precipitation at 163 mm (6.4 in) across 13 days, the overall humidity is lower at 78%. For more information on the autumn weather, check Portland weather in October.
January and November exhibit notable differences in weather patterns. In January, temperatures range from a minimum of -19°C (-2°F) to a maximum of 12°C (54°F), with an average temperature hovering around -2°C (28°F). The month sees significant cold, with high humidity at 86% and about 97 mm (3.8 in) of precipitation spread over 9 days. In contrast, November experiences milder conditions, with temperatures ranging from a minimum of -12°C (11°F) to a maximum of 18°C (64°F), and an average temperature of 5°C (42°F). The month's precipitation is higher, totaling 130 mm (5.1 in) over 12 days, coupled with slightly lower humidity at 84%. The shift from the frigid January chill to the comparatively mild November weather can significantly impact outdoor activities. For more details on the weather in November, you can visit Portland weather in November.
In comparing the weather of January and December, both months experience chilly temperatures, but January tends to be slightly colder on average, with a minimum temperature of -19°C compared to December's -18°C. The average temperature in January is around -2°C, while December averages slightly warmer at 0°C. January also sees less precipitation, accumulating 97 mm over 9 days, whereas December records 144 mm across 10 days. Additionally, January has a higher humidity level of 86% compared to December's 81%. For more detailed insights, you can visit Portland weather in December.
January in Portland presents a unique weather profile that sets it apart from other months. With its cold temperatures – peaking at around 12°C but often dipping down to frigid minimums – January is one of the chilliest months of the year. The average temperature hovers around -2°C, making it a stark contrast to the milder and more temperate conditions of spring and summer. Additionally, January experiences notable precipitation, with nearly 97 mm falling over about 9 days, contributing to a rather damp and humid environment with humidity levels reaching 86%. This combination of cold, wet conditions can make Portland feel particularly brisk, encouraging residents and visitors alike to seek warmth and indoor activities. For more insights into the city’s weather patterns, explore Portland Climate.