Last updated: April 22, 2025
In January, San Diego, Mexico experiences a delightful mix of warmth and mild conditions. With maximum temperatures reaching 33°C (91°F) and an average of 20°C (68°F), the days are pleasantly warm, perfect for outdoor activities. Nights, however, can be refreshing, dipping to a minimum of 8°C (47°F). Rainfall is minimal, with only 6 mm (0.3 in) recorded over just one day, making this month relatively dry. The humidity hovers around 76%, adding a touch of tropical feel to the air. Overall, January is an inviting time to visit, offering a comfortable climate for exploration and relaxation.
In January, San Diego, Mexico, experiences a comfortable climate with temperatures that typically range from a cool 8°C (47°F) at night to a pleasant 20°C (68°F) during the day, peaking at a warm 33°C (91°F). This month showcases a gradual warming trend as it transitions into February, maintaining similar averages while seeing a slight increase in maximum temperatures. As the winter months progress into spring, particularly by March and April, the warmth continues to rise, with average temperatures ascending to 22°C (72°F) in March and reaching a balmy 24°C (75°F) in April. The maximum temperatures also climb steadily, hinting at the upcoming summer heat. This pattern of mild nights and warm days reflects a region that enjoys a broad range of temperatures, making it an appealing destination for outdoor activities throughout the month.
In San Diego, Mexico, January marks the beginning of a drier season, with just 6 mm (0.3 in) of precipitation falling over the course of a single day. This minimal rainfall is a sharp contrast to the months that follow, particularly February, which sees a notable increase in precipitation to 24 mm (0.9 in). As the year progresses, the dry conditions are punctuated by the summer months, where rainfall dramatically escalates, peaking in August with 152 mm (6.0 in) across 19 days. The trend clearly indicates that while January is typically dry, the region prepares for a wet season ahead, highlighting the stark seasonal shifts characteristic of San Diego's climate.
In January, San Diego, Mexico, experiences a relatively high humidity level of 76%, setting the stage for a damp winter atmosphere. As the year progresses into February, humidity drops to 69%, marking the beginning of a trend toward lower moisture levels that continues through March and April, where it hits a comfortable 57% and 49%, respectively. However, as the heat of summer approaches, humidity levels begin to rise again, peaking in the warmer months of July and August at a sweltering 82% and 87%. The trend then persists into the fall, with humidity remaining high through September and October, before gradually retreating again by November and December. This seasonal ebb and flow underscores San Diego's unique climate, balancing moisture levels throughout the year.
In January, San Diego experiences a UV Index of 7, indicating a high exposure category with a burn time of 25 minutes. As the year progresses, the UV Index climbs steadily, peaking at 13 in both April and May, which categorize as extreme with a significantly reduced burn time of just 10 minutes. This trend suggests that as winter turns to spring, sun protection becomes increasingly crucial, especially when facing a swift transition to intense UV levels. After May, the UV Index remains elevated through September, consistently staying in the extreme zone, before tapering off in October and November with indices of 11 and 8, respectively. Interestingly, December welcomes a slight reprieve with a UV Index of 6. For more detailed insights into UV trends year-round, visit San Diego UV Index.
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January in San Diego, Mexico, begins the year with an inviting 222 hours of sunshine, setting a warm tone for the months to come. As winter fades, daylight steadily increases, peaking with 360 hours in May, where the sun truly embraces the area. The bright days gently recede through the summer and into the fall, revealing a picturesque transition from the abundant sunshine of late spring (May’s peak) to 272 hours in November and 273 hours in December. This trend showcases San Diego's distinct seasonal rhythm, with each month offering a delightful array of sunny moments, making it a year-round haven for sun seekers.
In San Diego, Mexico, January boasts a healthy 65% chance of sunny weather, making it one of the brighter months of the year. This trend continues into April, which matches January's sunny disposition, while February dips slightly to 61%. As the year progresses, the likelihood of sunshine fluctuates, peaking in May with an impressive 80%, yet dwindling considerably during the summer months, hitting a low of just 21% in August. As autumn approaches, the chances of clear skies rebound, especially in October with a solid 75%. Overall, while January offers promising sunlit days, it serves as just the beginning of San Diego’s seasonal sunshine journey, with dramatic shifts that keep both locals and visitors on their toes.
In San Diego, Mexico, January greets residents with a cozy 10 hours of daylight, gradually increasing to 11 hours in February. As spring approaches, the days extend further to 12 hours in March and April, allowing more time for outdoor adventures. The sunlight peaks in May and June, providing 13 hours of daylight, ideal for exploring the region’s stunning landscapes. This abundance of light continues through July, but as summer wanes, daylight subtly declines to 12 hours in August and September. The days become shorter in the fall, slipping to 11 hours in October, and finally returning to 10 hours in both November and December. This rhythmic ebb and flow of daylight reveals a comforting predictability, inviting residents and visitors alike to embrace the beauty of each season.
In January, San Diego, Mexico, experiences a gentle breeze with an average wind speed of 1.9 m/s (4 mph), setting the tone for a calm winter month. As the year progresses into February, the winds slightly decrease to 1.8 m/s (4 mph), but remain comfortably light. By March and June, there’s a subtle uptick in wind activity, peaking at 2.1 m/s (5 mph), which brings a refreshing touch to the warmer days. Interestingly, July and August see the winds tapering down to their lowest levels, with speeds dropping to 1.6 m/s (4 mph) and 1.5 m/s (3 mph), respectively, making for tranquil summer afternoons. The trend begins to return to moderate levels in November and December, where the average picks up again to 1.7 m/s (4 mph) and 1.8 m/s (4 mph), creating a consistent, breezy experience as the year closes. This gentle fluctuation throughout the year enhances San Diego's inviting climate, perfect for enjoying outdoor activities.
The weather in San Diego 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 Diego and find detailed weather information for every month.
January and February exhibit quite similar temperature ranges, with both months experiencing minimums of 8°C (47°F), average temperatures around 20°C (68°F) to 20°C (69°F), and maximums peaking at 33°C (91°F) to 33°C (92°F). However, February sees a notable increase in precipitation, rising from just 6 mm (0.3 in) with only 1 rainy day in January to 24 mm (0.9 in) and 2 rainy days in February. Additionally, February's humidity is slightly lower at 69%, compared to January's 76%, making for a marginally drier feel despite the increased rainfall. For more details about February weather, you can check San Diego weather in February.
In January, temperatures in San Diego range from a minimum of 8°C (47°F) to a maximum of 33°C (91°F), with an average of 20°C (68°F). The month sees minimal precipitation at just 6 mm (0.3 in) over one day, and humidity levels are relatively high at 76%. In contrast, March offers slightly warmer conditions with a minimum temperature of 10°C (51°F) and a maximum of 34°C (94°F), along with an average temperature of 22°C (72°F). This month experiences even less rainfall, totaling only 2 mm (0.1 in) with no rainy days, and a noticeable drop in humidity to 57%. For more detailed information, check out San Diego weather in March.
In January, temperatures in San Diego range from a minimum of 8°C (47°F) to a maximum of 33°C (91°F), with an average temperature of 20°C (68°F). The month sees minimal precipitation, with only 6 mm (0.3 in) over the course of a single day and relatively high humidity at 76%. In contrast, April offers warmer conditions, featuring a minimum temperature of 12°C (53°F) and peaking at 36°C (97°F), averaging 24°C (75°F). Notably, April enjoys completely dry weather with no recorded precipitation, and the humidity drops significantly to 49%. For more details, check out San Diego weather in April.
In January, the weather is quite mild, with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 33°C (91°F), and an average temperature of 20°C (68°F). The month receives some rainfall, totaling 6 mm (0.3 in) over just one day, contributing to a higher humidity level of 76%. In contrast, May experiences warmer conditions, with a minimum temperature of 15°C (60°F) and a maximum reaching up to 37°C (98°F), averaging 26°C (80°F). Notably, May boasts dry weather, with no recorded precipitation and only 49% humidity. For more details on the pleasant conditions of May, you can check out San Diego weather in May.
In January, the weather is relatively mild, with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 33°C (91°F), and an average temperature of 20°C (68°F). The month experiences minimal precipitation, totaling just 6 mm (0.3 in) over only one day, and humidity is relatively high at 76%. In contrast, June brings warmer conditions with temperatures ranging from a minimum of 20°C (68°F) to a maximum of 38°C (100°F), and an average temperature of 29°C (84°F). Rainfall increases to 26 mm (1.0 in) over three days, while humidity drops to 64%. Overall, June is significantly hotter and drier compared to January, making for a more summer-like experience. For more detailed insights, check out San Diego weather in June.
In January, the weather is relatively mild, with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 33°C (91°F), averaging around 20°C (68°F). During this month, precipitation is minimal, with only 6 mm (0.3 in) over just one day, and humidity levels sit comfortably at 76%.
In contrast, July experiences significantly warmer conditions, with temperatures starting at a minimum of 23°C (74°F) and reaching as high as 37°C (100°F), averaging 29°C (85°F). However, this month is also much wetter, with a total precipitation of 86 mm (3.4 in) spread across 14 days, and humidity increases slightly to 82%. For more detailed information, check out San Diego weather in July.
When comparing the weather in January and August, it's clear that August is significantly warmer and more humid. In January, temperatures range from a mild 8°C (47°F) at night to a comfortable high of 33°C (91°F) during the day, with relatively low precipitation of just 6 mm over a single day. In contrast, August boasts much warmer temperatures, with minimums around 23°C (75°F) and maximums reaching up to 37°C (98°F), accompanied by substantial rainfall of 152 mm over 19 days, contributing to a higher humidity level of 87%. For more specific details on August weather, you can visit San Diego weather in August.
January and September display striking differences in weather patterns. In January, temperatures fluctuate from a mild minimum of 8°C (47°F) to a warm maximum of 33°C (91°F), with an average of 20°C (68°F). Precipitation is minimal, with only 6 mm (0.3 in) recorded over just one day, leading to a humidity level of 76%. In contrast, September experiences higher temperatures, ranging from a minimum of 23°C (74°F) to a maximum of 36°C (97°F), with an average of 28°C (83°F). This month sees significant rainfall, totaling 143 mm (5.6 in) across 20 days and a higher humidity of 88%. For an in-depth look at September's climate, you can explore San Diego weather in September.
In January, the weather is generally mild, with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 33°C (91°F). The average temperature sits comfortably at 20°C (68°F), accompanied by low precipitation of just 6 mm (0.3 in) across only 1 day, and a humidity level of 76%.
In contrast, October brings warmer conditions, with temperatures ranging from a minimum of 18°C (64°F) to a maximum of 37°C (98°F), and an average of 28°C (83°F). This month experiences higher precipitation at 43 mm (1.7 in) over 5 days, alongside increased humidity at 83%. For more details, you can check San Diego weather in October.
In January, the weather is generally mild with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 33°C (91°F), averaging around 20°C (68°F). With only 6 mm (0.3 in) of precipitation over just one day, humidity levels are around 76%. Conversely, November temperatures are warmer, with a minimum of 14°C (58°F) and a maximum of 36°C (98°F), averaging 25°C (77°F). This month sees significantly more rainfall at 46 mm (1.8 in) over two days and higher humidity at 84%. For a detailed look at the climate during November, check out San Diego weather in November.
In January, the temperature ranges from a minimum of 8°C (47°F) to a maximum of 33°C (91°F), with an average of 20°C (68°F). The month generally experiences low precipitation, totaling only 6 mm (0.3 in) over just one day, and humidity levels average around 76%. In contrast, December exhibits slightly warmer temperatures with a minimum of 10°C (51°F) and a maximum of 34°C (93°F), averaging 21°C (70°F). It also sees increased precipitation of 17 mm (0.7 in) over two days, accompanied by higher humidity levels at 86%. For more details, you can check San Diego weather in December.
January in San Diego is marked by a mild, sunny charm that sets it apart from the rest of the year. With average temperatures hovering around a comfortable 20°C (68°F), it offers a refreshing escape from the winter chill experienced in other parts of the country. While you might encounter a brief rain shower, with only 6 mm of precipitation over just a single day, the overall feel is predominantly dry and pleasant. The 76% humidity adds a slight warmth, making it a perfect time for outdoor activities. For those intrigued by the unique climate of this coastal gem, find out more at San Diego Climate.