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January Weather in Sussex, Canada

Last updated: June 18, 2025

In January, the average temperature in Sussex, Canada hovers around -7°C (20°F). Expect the mercury to dip as low as -30°C (-22°F) on the coldest days, while the maximum temperature can reach a mild 14°C (58°F). This month brings about 101 mm (4.0 in) of precipitation, spread over approximately 9 days. With an average humidity of 83%, be prepared for a chilly and damp month ahead!

January Temperature in Sussex

In January in Sussex, the average temperature is -7°C (20°F). The maximum can reach 14°C (58°F) and the minimum can be as low as -30°C (-22°F). Travelers should be prepared for extreme temperature fluctuations and dress accordingly.

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

The chart illustrates January temperature patterns in Sussex, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sussex, January typically has an average temperature of -7°C (20°F), with highs reaching up to 14°C (58°F) and lows dropping to around -30°C (-22°F).
JanFebMarAprMayJunJulAugSepOctNovDec202128405060666658473625
Data source: Temperature data for Sussex 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 Sussex

In Sussex in January, the total precipitation amount is 101 mm (4.0 in), occurring over a span of 9 days.

January Precipitation Trends in Sussex

The chart displays monthly precipitation patterns in Sussex, 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 Sussex, January typically receives around 101 mm (4.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec101104811051079987819193160114
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Sussex

In Sussex in January, humidity is 83%. With an average temperature of -7°C (20°F), this humidity feels like you’re wrapped in a damp, cold blanket, making it challenging to stay warm and comfortable while traveling.

January Average Humidity in Sussex

This chart illustrates the average monthly humidity levels in Sussex, 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 Sussex is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%84%82%80%78%82%84%82%82%82%84%82%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Sussex

In Sussex in January, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Sussex, you can visit Hourly UV Index in Sussex.

Maximum UV Index Levels in Sussex for January

The chart shows the monthly maximum UV Index (UVI) for Sussex 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 Sussex typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2357910887532
Data source: Sussex 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 Sussex Compares to Other Months

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

This table compares monthly weather conditions in Sussex, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (20°F)101 mm (4.0 inches)83%low
February Weather-6°C (21°F)104 mm (4.1 inches)84%moderate
March Weather-2°C (28°F)80 mm (3.2 inches)82%moderate
April Weather4°C (40°F)105 mm (4.1 inches)80%high
May Weather10°C (50°F)107 mm (4.2 inches)78%very high
June Weather15°C (60°F)99 mm (3.9 inches)82%very high
July Weather19°C (66°F)87 mm (3.4 inches)84%very high
August Weather19°C (66°F)81 mm (3.2 inches)82%very high
September Weather15°C (58°F)91 mm (3.6 inches)82%high
October Weather9°C (48°F)93 mm (3.7 inches)82%moderate
November Weather2°C (36°F)160 mm (6.3 inches)84%moderate
December Weather-4°C (25°F)114 mm (4.5 inches)82%low

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