Last updated: February 24, 2025
January in San Jose, United States, offers a mild winter climate characterized by a maximum temperature reaching 24°C (75°F), while the average hovers around 10°C (51°F). With temperatures occasionally dipping to a minimum of 0°C (32°F), residents experience a refreshing blend of cool days and crisp nights. During this month, the city sees 145 mm (5.7 in) of precipitation over approximately 8 rainy days, contributing to an overall humidity level of 82%. This blend of moderate temperatures and occasional rain creates a unique atmosphere, making January a charming time to explore San Jose's landscapes and local culture.
In January, San Jose experiences a comfortable transition from the chilly winter months, with temperatures ranging from a brisk 0°C (32°F) to a pleasant 24°C (75°F). The average temperature sits at a mild 10°C (51°F), hinting at the region's moderate climate. As the month progresses, a gradual warming trend sets in, with February showing a slight increase in both average and maximum temperatures, illustrating the region's tendency to warm as it moves closer to spring. This consistency in warmth continues through the early months of the year, positioning San Jose as a delightful place to visit for those seeking to escape the harsh winter temperatures found elsewhere.
In San Jose, January typically sets the stage for the rainy season, delivering 145 mm (5.7 in) of precipitation over about 8 days. This significant rainfall marks January as the wettest month of the year, followed closely by February with 133 mm (5.2 in). As the season progresses into March, precipitation gradually decreases to 114 mm (4.5 in), while the number of rainy days increases to 12, suggesting a more scattered but consistent rainfall pattern. By April, the downpour takes a sharp dive to just 37 mm (1.4 in), and by the summer months, San Jose sees virtually no rain at all. This trend highlights a distinct seasonal shift, where the city's lush winter months fade into dry, sun-soaked summers, reinforcing its Mediterranean climate character.
In January, San Jose experiences a humidity level of 82%, setting the tone for a month that is generally characterized by a cool and damp atmosphere. This slight dip in humidity is reminiscent of December, which sits at 80%, suggesting a relatively stable pattern heading into the new year. As winter progresses into February, humidity slightly increases to 84%, marking the peak in the first quarter. Notably, March sees a return to 82%, indicating a consistency that continues into April, when humidity begins to decrease to 78%. This decline paves the way for a more comfortable spring as the city moves into the drier months of late spring and summer, culminating in July and August where humidity hits its low at 58% and 54% respectively. The gradual increase resumes in early fall, with September at 55%, and a return to more humid conditions by November at 78%. Overall, January's humidity offers a glimpse into the seasonal shifts, reflecting a steady rhythm that underscores the region's climate patterns throughout the year.
In January, San Jose typically experiences a UV Index of 4, indicating a moderate level of sun exposure with a burn time of about 30 minutes. As the year progresses, the UV Index gradually rises, peaking at 11 during the extreme months of May through July, where burn time narrows to just 10 minutes. The trend of increasing UV intensity is notable, with a sharp leap to 8 in March and 9 in April, suggesting that early spring requires heightened sun protection. The Index then begins to decline again in the later months, settling at a moderate level by November and dropping to 3 in December. Overall, the data emphasizes the importance of seasonal sun safety practices in San Jose, especially during the summer months. For a detailed overview, visit San Jose UV Index.
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San Jose welcomes the new year with 162 hours of sunshine in January, setting the stage for a gradual increase in bright days as winter transitions into spring. February sees a rise to 222 hours, hinting at the promise of more radiant weather. As spring unfolds, March and April shine brightly with 269 hours and 303 hours, respectively, before May bursts forth with 360 hours of glorious sunshine, echoing the onset of summer. The sun reaches its peak in July with 379 hours, enveloping the city in warmth. As autumn approaches, the sunlight starts to wane, dropping to 348 hours in August and gradually declining to 206 hours by December. This seasonal dance of sunlight highlights the beauty and variability of San Jose's climate, inviting residents and visitors alike to embrace the sun-filled days that flourish in the heart of California.
In January, San Jose experiences a 44% chance of sunny weather, a figure that marks the beginning of a gradual upward trend in sunshine as the year progresses. This percentage sets the stage for a shift toward brighter days, with February seeing an increase to 57%, and sunshine peaks in the summer months, notably in August at 84%. As winter transitions to spring, the likelihood of sunny days remains fairly consistent, hovering around the mid-fifties in March and April. Despite January's relatively cloudy skies, hope shines brightly as the city's climate transforms, ushering in sunnier conditions across the subsequent months.
In January, San Jose experiences approximately 9 hours of sunlight, a stark contrast to the longer days that follow as the year progresses. February sees an increase to 10 hours, hinting at the gradual lengthening of daylight. As spring approaches, March offers 11 hours, paving the way for the vibrant growth of April, which boasts a generous 13 hours of daylight. The trend continues, peaking in the summer months of May through July, where San Jose basks in 14 hours of sunshine, embodying the essence of warm weather bliss. As summer wanes, daylight hours begin to recede, with 13 hours in August and 12 hours in September, leading to a gentle decline in the fall, culminating in 10 hours by November and back to 9 hours in December. This rhythm highlights a natural ebb and flow, enhancing San Jose's year-round allure, inviting residents to revel in both the brightness and the beauty of each season.
In January, the gentle breezes of San Jose usher in the year with an average wind speed of 2.1 m/s (5 mph), typical for this vibrant Californian city. As winter fades into spring, February maintains a similar pace, with a slight increase to 2.2 m/s (5 mph). The winds then taper off in April, dropping to 1.9 m/s (4 mph) as the season warms. This calming trend continues through the summer months, hitting a low of 1.5 m/s (3 mph) in August, when the air is often still and warm. However, as fall approaches, the winds pick up again, returning to 2.2 m/s in December. Overall, the average wind speeds in San Jose show a mild fluctuation throughout the year, with a notable calmness during the peak of summer and a refreshing return of breezes towards the year’s end.
The weather in San Jose 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 San Jose and find detailed weather information for every month.
January and February exhibit mild winter weather, but there are notable differences between the two months. In January, temperatures range from a minimum of 0°C (32°F) to a maximum of 24°C (75°F), with an average of 10°C (51°F). This month experiences a total precipitation of 145 mm (5.7 in) over 8 days, with a humidity level of 82%. On the other hand, February sees a slight dip in the minimum temperature to -1°C (30°F), while still reaching up to 25°C (77°F) at its peak, with an average of 11°C (52°F). Precipitation decreases slightly to 133 mm (5.2 in) over the same number of rainy days, and humidity is slightly higher at 84%. For a closer look at the weather specifics, check out San Jose weather in February.
In January, the weather sees a minimum temperature of 0°C (32°F), averaging around 10°C (51°F), and reaching a maximum of 24°C (75°F). This month experiences 145 mm (5.7 in) of precipitation over 8 days, maintaining a consistent humidity of 82%. In contrast, March offers slightly warmer conditions with a minimum temperature of 1°C (34°F) and an average of 11°C (53°F), peaking at 26°C (79°F). While March has slightly less rainfall at 114 mm (4.5 in) spread over 12 days, the humidity level remains the same at 82%. For a detailed comparison of weather in March, check out San Jose weather in March.
January and April exhibit notable differences in weather patterns. In January, temperatures range from a chilly minimum of 0°C (32°F) to a maximum of 24°C (75°F), with an average of 10°C (51°F). This month also sees significant precipitation, totaling 145 mm (5.7 in) over 8 days, contributing to a humidity level of 82%. In contrast, April brings milder conditions with minimum temperatures at 3°C (38°F) and maximums soaring up to 31°C (88°F), resulting in a higher average of 13°C (56°F). Precipitation drops dramatically to 37 mm (1.4 in) across just 4 days, and humidity slightly decreases to 78%. For more details, you can check San Jose weather in April.
In January, the weather is characterized by cooler temperatures, with averages around 10°C (51°F) and a maximum of 24°C (75°F). The month sees significant precipitation, totaling 145 mm (5.7 in) over 8 days, contributing to a high humidity level of 82%. In contrast, May brings warmer conditions, with average temperatures rising to 15°C (59°F) and reaching a maximum of 32°C (90°F). Additionally, precipitation drops dramatically to only 24 mm (0.9 in) over just 2 days, and humidity decreases to a more comfortable 71%. For more details on the weather in May, you can visit San Jose weather in May.
In January, the weather in San Jose is characterized by a cool climate, with average temperatures ranging from a minimum of 0°C (32°F) to a maximum of 24°C (75°F). This month sees significant precipitation, with about 145 mm (5.7 in) spread over 8 days, contributing to a high humidity level of 82%. In contrast, June brings warmer temperatures, with an average ranging from 8°C (47°F) to a scorching maximum of 37°C (99°F). Remarkably, June experiences minimal rainfall, with just 1 mm (0.0 in) and no rainy days, leading to a lower humidity of 64%. For a more detailed look at June's conditions, check out San Jose weather in June.
In January, the weather is quite cool, with temperatures ranging from a chilly 0°C (32°F) to a pleasant 24°C (75°F) during the day, coupled with high humidity at 82%. This month sees considerable precipitation, averaging 145 mm (5.7 inches) over about 8 days, creating a wetter and more humid environment. In contrast, July boasts a warmer climate, with temperatures ranging from 10°C (50°F) at night to a scorching 34°C (93°F) during the day. Remarkably, July is dry, with no recorded precipitation and significantly lower humidity at 58%. This stark contrast highlights the distinct seasonal shifts in San Jose's weather throughout the year. For more details, check out San Jose weather in July.
January presents a much cooler climate compared to August, with temperatures ranging from a minimum of 0°C (32°F) to a maximum of 24°C (75°F). The average temperature sits around 10°C (51°F), accompanied by significant rainfall of 145 mm (5.7 in) over about 8 days, resulting in high humidity levels of 82%. In contrast, August boasts a much warmer atmosphere, with temperatures ranging from a minimum of 11°C (52°F) to a scorching maximum of 39°C (102°F) and an average of 19°C (67°F). Notably, August is characterized by its dry conditions, receiving no precipitation at all, which leads to a lower humidity level of 54%. For more detailed information about August weather, visit San Jose weather in August.
In January, the weather is notably cooler, with temperatures ranging from a minimum of 0°C (32°F) to a maximum of 24°C (75°F) and an average of 10°C (51°F). The month also sees significant precipitation, accumulating 145 mm (5.7 in) over about 8 days, along with high humidity levels at 82%. In contrast, September experiences milder and more stable temperatures, from a minimum of 7°C (45°F) to a sweltering maximum of 41°C (106°F), with an average of 19°C (67°F). Remarkably, September has minimal rainfall, with only 3 mm (0.1 in) over the entire month and no rainy days, contributing to a much lower humidity of 55%. For more details on September weather, visit San Jose weather in September.
January and October present quite different weather patterns. In January, temperatures range from a chilly minimum of 0°C (32°F) to a pleasant maximum of 24°C (75°F), with an average of 10°C (51°F). The month is characterized by significant precipitation, totaling 145 mm (5.7 in) over about 8 days, and a high humidity level of 82%. In contrast, October experiences milder temperatures, with a minimum of 5°C (42°F), an average of 17°C (63°F), and a peak of 34°C (94°F). Rainfall is minimal, at just 25 mm (1.0 in) across a single day, and the humidity drops to a more comfortable 62%. The overall transition from January's wetter, cooler climate to October's drier, warmer conditions is quite remarkable. For more details, check out San Jose weather in October.
In January, the weather tends to be cooler, with temperatures ranging from a minimum of 0°C (32°F) to a maximum of 24°C (75°F) and an average of 10°C (51°F). It also experiences higher precipitation at 145 mm (5.7 in) over approximately 8 days, coupled with humidity levels around 82%. In contrast, November sees slightly milder temperatures, with a minimum of 1°C (34°F) and a maximum of 28°C (83°F), averaging 13°C (56°F). It has significantly less rainfall, totaling 56 mm (2.2 in) over 5 days, and a slightly lower humidity level at 78%. For more details about the climate during this month, you can check San Jose weather in November.
In comparing the weather of January and December, both months show similar average temperatures, hovering around 10°C (50°F), with January experiencing slightly cooler minimum temperatures at 0°C (32°F), compared to December's 1°C (34°F). January also brings more precipitation, totaling 145 mm (5.7 in) over 8 days, while December sees less rain at 116 mm (4.6 in) across 9 days. Humidity levels are quite close as well, with January at 82% and December at 80%. For more detailed insights, check out San Jose weather in December.
January in San Jose offers a refreshing contrast to the warmer months, with cooler temperatures that average around 10°C (51°F). While the city experiences moderate precipitation during this time, the air is less dry, with humidity hovering around 82%. Compared to the sweltering summers, January’s weather invites a different kind of outdoor enjoyment, making it a perfect time for fresh starts and invigorating adventures. For those curious about the overall climate nuances, feel free to explore more at San Jose Climate.