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January Weather in Wales, United States

Last updated: June 24, 2025

In January, the average temperature in Wales, United States hovers around -1°C (30°F). However, be prepared for a temperature range that can dip to a chilly -23°C (-9°F) or soar to a comfortable 19°C (67°F). With an average precipitation of 69 mm (2.7 in) spread over 8 days, and an average humidity level of 84%, this month presents a mix of brisk air and moisture.

January Temperature in Wales

In January in Wales, the average temperature is -1°C (30°F), with maximums reaching 19°C (67°F) and minimums dropping as low as -23°C (-9°F). This wide temperature range means travelers should be prepared for varying weather conditions and dress accordingly for both warmth and occasional mild days.

January Weather in Wales: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Wales, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Wales, January typically has an average temperature of -1°C (30°F), with highs reaching up to 19°C (67°F) and lows dropping to around -23°C (-9°F).
JanFebMarAprMayJunJulAugSepOctNovDec293237485968747366554133
Data source: Temperature data for Wales generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in Wales

In Wales in January, the precipitation amount is 69 mm (2.7 in) that falls over a period of 8 days.

January Precipitation Trends in Wales

The chart displays monthly precipitation patterns in Wales, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Wales, January typically receives around 69 mm (2.7 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec69888712510785149959713896124
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Wales

In Wales in January, humidity is 84%. With an average temperature of -1°C (30°F), this humidity feels like a sharp chill that seeps into your bones, making travel uncomfortable as the wetness in the air intensifies the cold, leaving you yearning for warmth and shelter.

January Average Humidity in Wales

This chart illustrates the average monthly humidity levels in Wales, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Wales is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%82%79%75%78%76%76%76%75%80%80%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Wales

In Wales in January, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Wales, you can check the information here.

Maximum UV Index Levels in Wales for January

The chart shows the monthly maximum UV Index (UVI) for Wales in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Wales typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3568910998642
Data source: Wales January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How January Weather in Wales Compares to Other Months

Weather in Wales varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Wales, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Wales, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)69 mm (2.7 inches)84%moderate
February Weather0°C (32°F)88 mm (3.5 inches)84%moderate
March Weather3°C (38°F)87 mm (3.4 inches)82%high
April Weather9°C (48°F)125 mm (4.9 inches)79%very high
May Weather15°C (59°F)107 mm (4.2 inches)75%very high
June Weather20°C (69°F)85 mm (3.3 inches)78%very high
July Weather23°C (74°F)149 mm (5.9 inches)76%very high
August Weather23°C (73°F)95 mm (3.7 inches)76%very high
September Weather19°C (66°F)97 mm (3.8 inches)75%very high
October Weather13°C (55°F)138 mm (5.4 inches)75%high
November Weather5°C (42°F)96 mm (3.8 inches)80%moderate
December Weather1°C (33°F)124 mm (4.9 inches)80%low

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