Last updated: February 24, 2025
In Cascade Locks, United States, December brings a unique blend of winter chill and wetness, with maximum temperatures reaching 14°C (58°F) and an average of just 2°C (36°F). The month can be surprisingly cold, with minimum temperatures plummeting to around -12°C (11°F). Rain is a frequent companion during this time, accumulating to a substantial 302 mm (11.9 in) over 21 days, resulting in an average humidity level of 88%. This combination of factors creates a damp and brisk atmosphere, characteristic of the enchanting winter landscape of Cascade Locks.
In Cascade Locks, December brings with it a chill, as temperatures dip to a minimum of -12°C (11°F). The month averages around 2°C (36°F), creating a brisk yet invigorating atmosphere perfect for winter activities. While the daytime can occasionally warm up to a maximum of 14°C (58°F), the overall trend reveals a gradual decrease in temperatures as the region moves deeper into winter. Compared to the preceding months, December's temperatures reflect a transition from the mild fall into the heart of winter, setting the scene for a picturesque snow-covered landscape along the Columbia River Gorge.
In December, Cascade Locks experiences a significant uptick in precipitation, with a remarkable 302 mm (11.9 in) falling over the month. This intense rainfall marks it as one of the wettest months of the year, aligning with the trend of increasing moisture that begins in the fall. Notably, December also hosts 21 days of precipitation, reflecting a consistent pattern of damp weather that contrasts sharply with the much drier summer months, where July sees a mere 9 mm (0.4 in). Interestingly, the precipitation peaks in the early winter months, with both November and December delivering substantial rain, suggesting that Cascade Locks is not only lush and green but also embraces a wetter climate as the year draws to a close. This pattern emphasizes the region's shift from the relatively dry conditions of late spring and summer to a season rich in rainfall, painting a vivid picture of the seasonal cycles that characterize this mountainous landscape.
In Cascade Locks, the December humidity reaches a significant 88%, mirroring November's levels and marking a consistent trend of elevated moisture as winter sets in. Starting the year with high humidity figures, averaging around 86-87% from January to March, conditions gradually become drier from May to September, with August and September notably dropping to just 62% and 59%, respectively. However, as autumn arrives, humidity levels rebound, culminating in December’s high. This seasonal rhythm underscores the unique climate of Cascade Locks, where the transition from the dry summer months to the damp winter creates a distinct atmospheric experience.
As the year draws to a close in Cascade Locks, December brings a low UV Index of 2, providing a reassuring break from the very high levels experienced during the summer months. This gradual decline from the peak of 10 in July and 9 in May is a welcome transition, allowing residents and visitors to safely enjoy outdoor activities with an extended burn time of 45 minutes. Overall, the trend showcases a significant reduction in UV exposure as winter approaches, contrasting sharply with the moderate exposure categories observed earlier in the fall. This seasonal shift highlights the importance of being mindful of UV radiation throughout the year, even in the colder months. To learn more about the UV Index trends and protect yourself effectively, check out Cascade Locks UV Index.
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In Cascade Locks, the rhythm of sunshine dances through the year, peaking in the warm summer months. December brings a gentle decline to 121 hours of sunlight, marking the beginning of winter's embrace. This is a stark contrast to the sun-drenched July, which shines with a robust 401 hours. A gradual increase in daylight can be seen from January with a mere 95 hours, climbing steadily to a vibrant 356 hours by mid-year. As the seasons change, the trends reveal a cozy nod to winter months like November and December where shorter days encourage a sense of comfort indoors. The transition from the brightness of May and June to the muted light of late fall captures the essence of Cascade Locks' seasonal charm, reminding us to savor the softer moments amidst the chill.
When considering the likelihood of sunny weather in Cascade Locks during December, the trend suggests that sunshine becomes increasingly scarce as the year progresses into winter. With only a 7% chance of sunny days, December sits at the lower end of the spectrum, starkly contrasting with the 73% chance of sunshine seen in July. The months leading up to December, particularly November with its 11% chance, already hint at the diminishing light. As the vibrant summer sun gives way to the colder, cloudier months, residents can expect a significant dip in sunny weather, making December one of the cloudiest periods of the year in this beautiful region of the United States.
As the year draws to a close, Cascade Locks experiences a gradual decline in daylight during December, with only 8 hours of light available each day. This reduction marks the lowest point in the annual cycle, following a steady increase from 9 hours in January through to 15 hours in June and July. The trend is reflective of the seasonal shift, transitioning from the long, bright days of summer to the shorter, cozy daylight periods of winter. After peaking in the vibrant month of June, daylight hours progressively diminish, encouraging a sense of rest and reflection as the community prepares for the new year ahead.
As December settles in Cascade Locks, the average wind speed remains relatively calm at 2.4 m/s (5 mph), mirroring the gentle breezes of the preceding months. This consistency highlights a subtle trend: throughout the year, wind speeds have generally hovered around the 2.2 to 2.5 m/s mark, creating a serene atmosphere ideal for outdoor activities. Notably, November saw a slight uptick to 2.5 m/s (6 mph), suggesting that as autumn waned, winds picked up ever so slightly, only to return to their tranquil pace in December. This stable pattern not only characterizes the region’s winter weather but also reflects the natural beauty of Cascade Locks that residents cherish year-round.
The weather in Cascade Locks changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of December's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Cascade Locks and find detailed weather information for every month.
December and January both feature cold temperatures and significant precipitation, but there are some key differences between the two months. December experiences a milder minimum temperature of -12°C (11°F), while January can drop to a colder -16°C (4°F). The average temperature remains consistent at 2°C (36°F) for both months, but the maximum temperature in December reaches a higher 14°C (58°F), compared to January's 12°C (54°F). In terms of precipitation, December sees slightly more rain, with 302 mm (11.9 in) over 21 days, while January has 275 mm (10.8 in) across 18 days. Humidity levels are also comparable, with December at 88% and January at 86%. For a detailed look at the weather specifics for January, see Cascade Locks weather in January.
In December, temperatures in Cascade Locks range from a chilly -12°C (11°F) to a milder 14°C (58°F), averaging around 2°C (36°F). The month sees significant rainfall, with around 302 mm (11.9 in) of precipitation spread over 21 days and a high humidity level of 88%. In contrast, February experiences slightly colder temperatures, with a minimum of -17°C (1°F) while maintaining the same maximum of 14°C (58°F) and an average of 2°C (35°F). Precipitation remains similar, at 301 mm (11.8 in) over the same number of rainy days, but humidity drops marginally to 87%. For more detailed information on February weather, check out Cascade Locks weather in February.
December and March present distinct contrasts in weather patterns. In December, temperatures range from a chilling minimum of -12°C (11°F) to a mild maximum of 14°C (58°F), with an average of around 2°C (36°F). The month is characterized by significant precipitation, totaling 302 mm (11.9 in) over 21 days, alongside high humidity levels at 88%. In contrast, March sees a rise in temperatures, with minimums around -9°C (16°F) and maximums reaching 20°C (68°F), averaging 4°C (40°F). Precipitation decreases to 194 mm (7.6 in) across 18 days, and humidity is slightly lower at 86%. For more detailed insights into the weather patterns, you can check the Cascade Locks weather in March.
The weather in December is characterized by cold temperatures, with a minimum of -12°C (11°F) and an average of 2°C (36°F), while April sees milder conditions with a minimum of -4°C (26°F) and an average of 8°C (46°F). December experiences significantly more precipitation, totaling 302 mm (11.9 in) over 21 days, compared to April’s 170 mm (6.7 in) spread over 16 days. Humidity levels are slightly higher in December at 88%, while April maintains a close 85%. For more specific details about April's weather, you can check Cascade Locks weather in April.
In December, the weather is starkly colder, with temperatures ranging from a chilly -12°C (11°F) at the minimum to a maximum of 14°C (58°F), and an average temperature of just 2°C (36°F). The month experiences significant precipitation, totaling 302 mm (11.9 in) over 21 days, coupled with high humidity at 88%. In contrast, May brings a much milder climate, with temperatures climbing from a minimum of 0°C (33°F) to a pleasant maximum of 30°C (86°F), averaging around 12°C (54°F). Rainfall is considerably lower in May, measuring 86 mm (3.4 in) over only 12 days, while humidity decreases slightly to 80%. For a closer look at what to expect, check out Cascade Locks weather in May.
December and June present striking contrasts in weather patterns. December experiences colder temperatures, with a minimum of -12°C (11°F) and an average of 2°C (36°F), peaking at 14°C (58°F). This month also sees significant precipitation, totaling 302 mm (11.9 in) over 21 days, accompanied by high humidity levels at 88%. In stark contrast, June warms up with minimum temperatures of 4°C (40°F) and averages around 15°C (60°F), reaching a scorching maximum of 42°C (108°F). Moreover, June is much drier, receiving only 72 mm (2.8 in) of precipitation across 9 days, with humidity slightly lower at 82%. For a closer look at the weather specifics, check out Cascade Locks weather in June.
December and July present stark contrasts in weather at Cascade Locks. In December, temperatures can plunge to a minimum of -12°C (11°F), with an average of 2°C (36°F) and a maximum of 14°C (58°F). The month is characterized by high precipitation, with about 302 mm (11.9 in) spread over 21 days, contributing to a humidity level of 88%. In contrast, July experiences milder conditions, where temperatures range from a minimum of 6°C (42°F) to a scorching maximum of 37°C (98°F), with an average of 19°C (66°F). Precipitation is minimal, at only 9 mm (0.4 in) over just 3 days, and humidity drops to 78%. Overall, December is marked by cold and wet weather, while July offers warmth and dryness. For more details, you can check Cascade Locks weather in July.
December and August present stark contrasts in weather. In December, temperatures can plunge to a minimum of -12°C (11°F) and average around 2°C (36°F), with highs reaching only 14°C (58°F). This month also experiences significant precipitation, totaling 302 mm (11.9 in) over 21 days, coupled with high humidity levels averaging 88%. In contrast, August boasts much milder temperatures, with a minimum of 6°C (43°F) and an average of 19°C (67°F), peaking at a sweltering 38°C (101°F). Precipitation during this summer month is minimal, with only 13 mm (0.5 in) recorded over just 4 days, and humidity drops to a comfortable 62%. For more detailed information, check out Cascade Locks weather in August.
The weather in December is characterized by cold temperatures, with minimums dipping as low as -12°C (11°F) and an average of around 2°C (36°F), while September offers a much milder experience, featuring averages of 15°C (60°F) and maximums reaching up to 35°C (96°F). Additionally, December is much wetter, accumulating 302 mm (11.9 in) of precipitation over 21 days, compared to September's 103 mm (4.0 in) spread across just 9 days. The humidity in December is notably higher at 88%, contrasting sharply with September’s more comfortable 59%. For more specifics on September weather patterns, you can check Cascade Locks weather in September.
When comparing the weather in December to that of October, it becomes clear that December is significantly colder, with average temperatures hovering around 2°C (36°F), while October enjoys milder conditions with an average of 9°C (48°F). The minimum temperatures in December can plunge to -12°C (11°F), compared to October’s slightly more temperate minimum of -5°C (24°F). Additionally, December experiences higher precipitation, with 302 mm (11.9 in) over 21 days, in contrast to October's 201 mm (7.9 in) over 14 days. The humidity level also peaks in December at 88%, whereas October sees a more moderate 78%. For a closer look at conditions specific to October, you can check this resource: Cascade Locks weather in October.
December weather tends to be colder and wetter compared to November. The minimum temperature in December drops to -12°C (11°F), while in November it is a milder -4°C (25°F). The average temperature in December is slightly lower at 2°C (36°F), compared to November's 5°C (41°F). Additionally, December experiences more precipitation, with 302 mm (11.9 in) over 21 days, compared to November's 265 mm (10.4 in) over 19 days. Despite both months sharing a high humidity level of 88%, December's colder temperatures contribute to a distinctly harsher winter atmosphere. For a closer look at November weather specifics, you can refer to Cascade Locks weather in November.
December in Cascade Locks is a month of contrasts, where the chill of winter truly sets in. Unlike the milder months, December experiences a stark drop in temperatures, often hovering around freezing and occasionally plummeting to frigid lows. The heavy cloud cover and high humidity create a damp atmosphere, contributing to frequent precipitation throughout the month, making it one of the wettest times of the year. This shift not only alters the landscape, cloaking it in a tranquil, frosty charm but also sets the stage for cozy indoor activities as residents and visitors alike embrace the holiday spirit amid the cold. For a more detailed understanding of how December fits into the yearly weather patterns, explore the full insights at Cascade Locks Climate.