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January Weather in Siston, United Kingdom

Last updated: August 27, 2025

In January, the average temperature in Siston, United Kingdom hovers around 5°C (42°F). However, be prepared for some fluctuation, as temperatures can dip to a chilly -4°C (25°F) or rise to a mild 14°C (58°F). During this month, expect about 56 mm (2.2 in) of precipitation spread over 10 days, coupled with an average humidity of 88%—perfect for cozy indoor moments!

January Temperature in Siston

In January in Siston, the average temperature is 5°C (42°F). Maximums can reach 14°C (58°F), while minimums can drop as low as -4°C (25°F). Travelers should be prepared for chilly conditions and pack accordingly.

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

The chart illustrates January temperature patterns in Siston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Siston, January typically has an average temperature of 5°C (42°F), with highs reaching up to 14°C (58°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec414345495461646258534644
Data source: Temperature data for Siston 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 Siston

In Siston in January, the precipitation amount is 56 mm (2.2 in) over the course of 10 days.

January Precipitation Trends in Siston

The chart displays monthly precipitation patterns in Siston, 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 Siston, January typically receives around 56 mm (2.2 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec5667745073726878551016690
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Siston

In Siston in January humidity is 88%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less appealing and leading you to seek warmth indoors instead.

January Average Humidity in Siston

This chart illustrates the average monthly humidity levels in Siston, 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 Siston is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%86%84%80%80%70%73%79%89%90%89%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Siston

In Siston in January, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in Siston.

Maximum UV Index Levels in Siston for January

The chart shows the monthly maximum UV Index (UVI) for Siston 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 Siston typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578876421
Data source: Siston 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 Siston Compares to Other Months

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

This table compares monthly weather conditions in Siston, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)56 mm (2.2 inches)88%low
February Weather6°C (44°F)67 mm (2.6 inches)88%low
March Weather7°C (46°F)74 mm (2.9 inches)86%moderate
April Weather9°C (49°F)50 mm (2.0 inches)84%moderate
May Weather12°C (55°F)73 mm (2.9 inches)80%high
June Weather16°C (61°F)72 mm (2.8 inches)80%very high
July Weather18°C (64°F)68 mm (2.7 inches)70%very high
August Weather17°C (63°F)78 mm (3.1 inches)73%high
September Weather15°C (59°F)55 mm (2.2 inches)79%high
October Weather12°C (53°F)101 mm (4.0 inches)89%moderate
November Weather8°C (47°F)66 mm (2.6 inches)90%low
December Weather7°C (44°F)90 mm (3.5 inches)89%low

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