Last updated: March 17, 2025
In Cardiff, United Kingdom, January brings a chilly embrace, with maximum temperatures reaching 13°C (56°F) and an average of 6°C (42°F). The month can be brisk, with lows dipping to -3°C (27°F). Rain is a common companion during this time, as 75 mm (3.0 in) of precipitation falls over an average of 12 days, contributing to a notably high humidity level of 88%. Visitors might expect a wet and cool atmosphere, perfect for cozy indoor activities while enjoying the unique charm of the city in winter.
In January, Cardiff experiences a chilly embrace of winter, with temperatures ranging from a biting -3°C (27°F) as the minimum to a mild 13°C (56°F) at its peak. The average temperature holds steady at around 6°C (42°F), indicating that while frosty mornings are common, the city can still offer some respite with milder afternoons. As the month unfolds, there's a hint of warmth teasing the chilly air, a precursor to the gradual rise observed in February and beyond. This month marks the coldest period of the year, paving the way for the eventual spring thaw, where temperatures steadily climb and nature begins to awaken once more.
In January, Cardiff experiences a moderate amount of rainfall, with 75 mm (3.0 in) falling over 12 days. This marks the beginning of a typically wet year, as precipitation levels start to rise significantly in February and persist through the winter months. While January's rainfall is less than that of the following month, which sees an increase to 101 mm (4.0 in), it sets the tone for a season characterized by consistent moisture. Notably, after January, the precipitation peaks in October with 135 mm (5.3 in) across 16 days, illustrating the trend of increased rainfall as the year progresses. Overall, January's patterns reflect Cardiff's climate, where wet conditions are a staple, especially as the year transitions from winter to spring.
In January, Cardiff experiences a notable humidity level of 88%, setting the tone for a winter that remains consistently damp. This high humidity continues into February, lingering at the same percentage before gradually tapering off in the spring months. By March and April, humidity dips slightly to 86% and 84%, respectively, signaling a subtle transition towards drier conditions. As the year progresses into summer, Cardiff sees a significant drop, with humidity falling to 70% in July and slightly rising again in August to 73%. The autumn months bring a return to higher humidity, peaking once more in October at 89%, before culminating in November's 90%, making it one of the wettest months of the year. Interestingly, the year winds down with December maintaining a high humidity level of 89%, highlighting Cardiff’s characteristic dampness throughout the colder months. Overall, the humidity pattern reflects a distinct seasonal ebb and flow, with the city exhibiting its most humid conditions during the winter and autumn seasons.
In January, Cardiff experiences a low UV Index of 1, indicating minimal risk from sun exposure with a burn time of 45 minutes. As winter progresses into February, the UV Index slightly rises to 2, still maintaining that low exposure category. However, once March arrives, the Index escalates to 4, entering a moderate range and decreasing the safe burn time to just 30 minutes. The warmth of spring introduces higher UV readings throughout April and May, reaching 6 and 7 respectively, both categorized as high; during this period, the burn time shortens to 25 minutes. By June and July, the UV Index peaks at 8, categorized as very high with a mere 15-minute burn time, highlighting the need for sun protection. The trend softens a bit in August and September, dropping to 7 and 6 again, yet still necessitating vigilance with 25-minute burn times. As we transition into the latter months of the year, the UV Index decreases to 4 in October, before settling back to low readings of 2 in November and 1 in December where residents can enjoy a safer 45-minute exposure. To stay informed about UV trends, visit Cardiff UV Index.
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In January, Cardiff welcomes the year with 81 hours of sunshine, setting a tone of crisp winter days. As the calendar flips to February, daylight begins to gradually increase, boasting 134 hours of brightening skies. By March, the transition becomes more pronounced, with 192 hours of sunshine hinting at the arrival of spring. This trend continues into April, where the sunshine nearly doubles to 303 hours, invigorating the city and its residents. The warmth of May shines through with 379 hours, heralding the peak of spring and leading seamlessly into the sun-drenched days of June with 355 hours. The summer months, particularly July with its highest total of 399 hours, showcase Cardiff at its sunniest. Even as the seasons change, August retains a healthy 345 hours, while the autumn months see a gradual decline; September offers 279 hours, and by October, sunshine dips to 224 hours. The year winds down with November and December bringing back the cool and gray, yielding only 121 and 100 hours of sunshine respectively. Overall, Cardiff's weather reflects a vibrant cycle of light and warmth, transitioning from the coldest winter days to the peak summer sunshine.
In Cardiff, the likelihood of sunny weather is quite low in January, with only a 21% chance of sunshine. This marks one of the dullest months of the year, as the sun gradually becomes more prevalent in the following months. February sees a slight increase to 23%, hinting at the approaching spring. As winter fades, the chance of sunny days rises significantly in March to 29% and continues to climb dramatically through April, where it reaches 52%. Notably, this upward trend continues throughout spring and summer, peaking in July at 41%. Overall, while January may be a time for cozy indoor activities, the promise of brighter days is just around the corner as the year progresses.
In Cardiff, January ushers in the year with just 8 hours of daylight, setting a stark contrast to the longer, sunlit months that follow. As February arrives, the days gradually lengthen to 9 hours, hinting at the promise of spring. By March, the daylight extends to 11 hours, marking a clear shift towards warmer weather. This trend accelerates, with April enjoying 13 hours and May basking in 15 hours of light. The peak arrives in June and July, where the daylight stretches to a brilliant 16 hours, providing ample time for outdoor activities. However, as summer wanes, August sees a gentle decline to 14 hours, followed by a gradual contraction through September and October, where daylight dips to 10 hours. Finally, November and December bring the year full circle, as daylight diminishes to 8 hours and a dim 7 hours, respectively, reminding us of the cyclical nature of time and the changing seasons.
In January, Cardiff greets the new year with a brisk average wind speed of 5.1 m/s (11 mph), laying the groundwork for a season marked by varying breeziness. As the winter progresses into February, the winds pick up slightly to 5.7 m/s (13 mph), making this the windiest month of the early year. However, as March approaches, a noticeable drop to 4.8 m/s (11 mph) signals the start of milder conditions, setting the stage for spring. The overall trend shows that while the winds in January are relatively gentle, they are surpassed in intensity during February before gradually easing off, suggesting a transitional shift toward the warmer months ahead. This ebb and flow in wind speeds continues into the spring, where by April, winds calm down to 3.7 m/s (8 mph), showcasing how Cardiff's weather dances between the energetic gusts of winter and the softer breezes of blossoming spring.
The weather in Cardiff 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 Cardiff and find detailed weather information for every month.
January and February weather in Cardiff shows some notable similarities and differences. January typically experiences slightly milder temperatures, with average lows of -3°C (27°F) and highs of 13°C (56°F), while February sees the mercury dip a bit lower at a minimum of -4°C (26°F) but reaches a higher maximum of 15°C (60°F). Precipitation is more frequent in February, with 101 mm (4.0 in) across 14 days compared to January's 75 mm (3.0 in) over 12 days. Both months maintain high humidity levels at 88%, making the air feel damp and cool. For more detailed information about February's weather, visit Cardiff weather in February.
In January, the weather is cool with temperatures ranging from a minimum of -3°C (27°F) to a maximum of 13°C (56°F), experiencing an average temperature of 6°C (42°F). The month sees significant precipitation totaling 75 mm (3.0 in) over approximately 12 days, with humidity levels at a high 88%. In contrast, March brings slightly milder weather, with temperatures from a minimum of -5°C (22°F) to a maximum of 18°C (65°F), and an average temperature of 7°C (45°F). However, precipitation increases to 97 mm (3.8 in) over 15 days, accompanied by slightly lower humidity at 86%. For more detailed insights, check out Cardiff weather in March.
January and April present quite distinct weather patterns. In January, temperatures range from a chilly -3°C (27°F) at their lowest to a mild 13°C (56°F) at their peak, with an average temperature of 6°C (42°F). The month is characterized by higher precipitation, with about 75 mm (3.0 in) falling over 12 days, and a noteworthy humidity level of 88%. In contrast, April sees a significant warming trend; temperatures range from a minimum of -1°C (30°F) to a comfortable maximum of 20°C (69°F), averaging at 9°C (49°F). Additionally, April experiences lower precipitation, totaling 57 mm (2.2 in) over 10 days, along with slightly reduced humidity at 84%. For more insights on April weather, you can check out Cardiff weather in April.
In comparing the weather between January and May, January presents a colder climate with minimum temperatures dipping to -3°C (27°F) and average highs reaching only 13°C (56°F). The month typically experiences 75 mm (3.0 in) of precipitation over 12 days and high humidity levels at 88%. In contrast, May enjoys milder temperatures, with a minimum of 2°C (35°F) and average highs of 24°C (76°F). Although precipitation increases slightly to 79 mm (3.1 in) over the same number of rainy days, the humidity drops to a more comfortable 80%. For more details on May weather specifically, check out Cardiff weather in May.
In January, the weather is notably cooler, with temperatures ranging from a minimum of -3°C (27°F) to a maximum of 13°C (56°F), accompanied by high humidity at 88%. The month experiences approximately 75 mm (3.0 in) of precipitation over 12 days. In contrast, June heralds a warmer climate, with temperatures ranging from a minimum of 7°C (45°F) to a maximum of 27°C (82°F), making it much more pleasant. Although June sees a slight increase in precipitation to 84 mm (3.3 in) over the same number of days, the humidity drops to 80%. This shift in weather makes June a more inviting month overall, perfect for outdoor activities. For more details, check out Cardiff weather in June.
The weather in January is characterized by much colder temperatures, with minimums dropping to as low as -3°C (27°F) and average temperatures around 6°C (42°F). In contrast, July brings a significant warmth, featuring minimum temperatures of 9°C (48°F) and average highs reaching 17°C (63°F), peaking at 28°C (82°F). Additionally, January experiences higher humidity levels at 88%, while July’s humidity is more comfortable at 70%. Precipitation remains similar between the two months, with January receiving 75 mm (3.0 in) and July slightly more at 85 mm (3.3 in) over approximately 12 days of rainfall each month. For a detailed insight into the warm summer weather, check out Cardiff weather in July.
In January, Cardiff experiences chilly weather with average temperatures ranging from a minimum of -3°C (27°F) to a maximum of 13°C (56°F), accompanied by high humidity levels at 88%. The month sees about 75 mm (3.0 in) of precipitation over approximately 12 days. In contrast, August presents a much milder climate, with temperatures ranging from a minimum of 9°C (48°F) to a comfortable maximum of 29°C (84°F) and an average of 17°C (62°F). While it is slightly wetter in August, with 97 mm (3.8 in) of rainfall over 13 days, the humidity drops to a more pleasant 73%. For more information about the weather in Cardiff during August, you can visit Cardiff weather in August.
In January, temperatures typically range from a chilly -3°C (27°F) at night to a mild 13°C (56°F) during the day, with an average temperature of 6°C (42°F). The month experiences about 75 mm (3.0 in) of precipitation over 12 days, contributing to a high humidity level of 88%. In contrast, September enjoys a more temperate climate, with nighttime lows of 4°C (40°F) and maximum daytime highs reaching 27°C (81°F), averaging 15°C (59°F). While precipitation slightly increases to 81 mm (3.2 in) over the same number of rainy days, the humidity drops to 79%. For more specific insights into September's weather, you can refer to Cardiff weather in September.
In January, the weather is colder, with temperatures ranging from a chilly -3°C (27°F) to a maximum of 13°C (56°F). The month experiences significant precipitation of 75 mm (3.0 in) over 12 days, and the humidity remains high at 88%. In contrast, October brings more mild temperatures, with a minimum of 1°C (33°F) and a comfortable maximum of 21°C (70°F), averaging 12°C (54°F). However, October is wetter, receiving 135 mm (5.3 in) of rainfall over 16 days, while humidity slightly increases to 89%. For more details on October weather, you can visit Cardiff weather in October.
January and November exhibit notable differences in weather patterns. In January, temperatures range from a minimum of -3°C (27°F) to a maximum of 13°C (56°F), with an average of 6°C (42°F). It is characterized by higher humidity at 88% and receives around 75 mm (3.0 in) of precipitation over 12 days. In contrast, November experiences milder temperatures, with a minimum of -1°C (30°F) and a maximum of 16°C (61°F), averaging at 9°C (48°F). It also has slightly more precipitation, totaling 99 mm (3.9 in) over 15 days, alongside an increase in humidity to 90%. For more details, you can visit Cardiff weather in November.
January and December present a somewhat similar climate, but with notable differences. In January, the average temperature hovers around 6°C (42°F), slightly warmer than December's average of 7°C (45°F). However, January experiences slightly lower minimum temperatures, reaching -3°C (27°F) compared to December's -4°C (26°F). Precipitation is also reduced in January, with total rainfall reaching 75 mm (3.0 in) over 12 days, while December sees a higher 130 mm (5.1 in) spread across 17 days. Additionally, humidity levels remain quite similar, with January at 88% and December at 89%. For a detailed look at December's weather, you can read more at Cardiff weather in December.
January in Cardiff brings a refreshing chill as temperatures generally hover around a cool average, distinctly setting it apart from the milder months of the year. With frequent precipitation and a high humidity level, this month often presents a damp and overcast atmosphere, unlike the sunnier spells that follow in spring. However, for those who don’t mind the brisk air and occasional rain, January reveals the city's charm in a quieter, more contemplative light. To explore more about the overall climate and what to expect throughout the year, check out the detailed breakdown at Cardiff Climate.