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January Weather in Sewickley Heights, United States

Last updated: June 24, 2025

In January, the average temperature in Sewickley Heights, United States hovers around -1°C (31°F). However, don't let that fool you; temperatures can fluctuate dramatically, with minimums plunging to -21°C (-6°F) and highs reaching up to 21°C (71°F). You'll also want to prepare for considerable moisture, as 92 mm (3.6 in) of precipitation is expected over 12 days, coupled with an average humidity of 88%.

January Temperature in Sewickley Heights

In January in Sewickley Heights, the average temperature is -1°C (31°F), with maximums reaching 21°C (71°F) and minimums dropping as low as -21°C (-6°F). It's essential to pack a variety of clothing to stay comfortable during your travels, as conditions can vary significantly from day to night.

January Weather in Sewickley Heights: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Sewickley Heights, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sewickley Heights, January typically has an average temperature of -1°C (31°F), with highs reaching up to 21°C (71°F) and lows dropping to around -21°C (-6°F).
JanFebMarAprMayJunJulAugSepOctNovDec313541516270757368574236
Data source: Temperature data for Sewickley Heights 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 Sewickley Heights

In Sewickley Heights in January, the precipitation amount is 92 mm (3.6 in) over the course of 12 days.

January Precipitation Trends in Sewickley Heights

The chart displays monthly precipitation patterns in Sewickley Heights, 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 Sewickley Heights, January typically receives around 92 mm (3.6 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec92118104130136137137821221249299
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Sewickley Heights

In Sewickley Heights in January, humidity is 88%. With an average temperature of -1°C (31°F), this humidity feels like a biting cold that penetrates your clothing, making outdoor exploration challenging and the air clingy, adding an extra chill that can make you feel even colder than the temperature suggests.

January Average Humidity in Sewickley Heights

This chart illustrates the average monthly humidity levels in Sewickley Heights, 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 Sewickley Heights is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%87%87%81%83%82%76%77%82%89%86%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Sewickley Heights

In Sewickley Heights 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 Sewickley Heights, you can check the information here.

Maximum UV Index Levels in Sewickley Heights for January

The chart shows the monthly maximum UV Index (UVI) for Sewickley Heights 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 Sewickley Heights typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Sewickley Heights 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 Sewickley Heights Compares to Other Months

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

This table compares monthly weather conditions in Sewickley Heights, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)92 mm (3.6 inches)88%moderate
February Weather1°C (35°F)118 mm (4.6 inches)88%moderate
March Weather5°C (42°F)104 mm (4.1 inches)87%high
April Weather11°C (52°F)130 mm (5.1 inches)87%very high
May Weather17°C (63°F)136 mm (5.4 inches)81%very high
June Weather21°C (70°F)137 mm (5.4 inches)83%very high
July Weather24°C (75°F)137 mm (5.4 inches)82%very high
August Weather23°C (73°F)82 mm (3.2 inches)76%very high
September Weather20°C (68°F)122 mm (4.8 inches)77%very high
October Weather14°C (57°F)123 mm (4.9 inches)82%high
November Weather6°C (42°F)92 mm (3.6 inches)89%moderate
December Weather2°C (36°F)99 mm (3.9 inches)86%low

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