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January Weather in Sylva, United States

Last updated: June 24, 2025

In January, the average temperature in Sylva, United States is a chilly 3°C (37°F), with extremes ranging from a brisk -18°C (0°F) to a mild 20°C (68°F). Be prepared for some wet days, as 111 mm (4.4 in) of precipitation typically falls over about 10 days. Expect the air to be quite moist, with an average humidity of 86%.

January Temperature in Sylva

In January in Sylva, the average temperature is 3°C (37°F). Maximums can reach 20°C (68°F) and minimums can be as low as -18°C (0°F). Be prepared for a wide range of temperatures when traveling to Sylva during this time.

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

The chart illustrates January temperature patterns in Sylva, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sylva, January typically has an average temperature of 3°C (37°F), with highs reaching up to 20°C (68°F) and lows dropping to around -18°C (0°F).
JanFebMarAprMayJunJulAugSepOctNovDec374347546267706966574541
Data source: Temperature data for Sylva 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 Sylva

In Sylva in January, the precipitation amount is 111 mm (4.4 in) over a span of 10 days.

January Precipitation Trends in Sylva

The chart displays monthly precipitation patterns in Sylva, 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 Sylva, January typically receives around 111 mm (4.4 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec1111741351361319610012812415093143
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Sylva

In Sylva in January humidity is 86%. With an average temperature of 3°C (37°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel less enjoyable.

January Average Humidity in Sylva

This chart illustrates the average monthly humidity levels in Sylva, 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 Sylva is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%82%85%85%83%76%76%80%88%88%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Sylva

In Sylva in January, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Sylva for better planning.

Maximum UV Index Levels in Sylva for January

The chart shows the monthly maximum UV Index (UVI) for Sylva 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 Sylva typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec478111211111110864
Data source: Sylva 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 Sylva Compares to Other Months

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

This table compares monthly weather conditions in Sylva, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (37°F)111 mm (4.4 inches)86%moderate
February Weather6°C (43°F)174 mm (6.9 inches)86%high
March Weather8°C (47°F)135 mm (5.3 inches)86%very high
April Weather12°C (54°F)136 mm (5.3 inches)82%extreme
May Weather16°C (62°F)131 mm (5.1 inches)85%extreme
June Weather19°C (67°F)95 mm (3.8 inches)85%extreme
July Weather21°C (70°F)100 mm (4.0 inches)83%extreme
August Weather21°C (69°F)128 mm (5.1 inches)76%extreme
September Weather19°C (66°F)124 mm (4.9 inches)76%very high
October Weather14°C (58°F)150 mm (5.9 inches)80%very high
November Weather7°C (45°F)93 mm (3.7 inches)88%high
December Weather5°C (41°F)143 mm (5.6 inches)88%moderate

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