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January Weather in Happy Valley, United States

Last updated: June 24, 2025

In January, the average temperature in Happy Valley, United States hovers around 5°C (41°F), making it a chilly time of year. Expect minimum temperatures to dip as low as -13°C (10°F) and occasionally reach a comfortable 15°C (59°F). This month also brings 203 mm (8.0 in) of precipitation spread over 17 days, resulting in a high average humidity of 85%. Be prepared for damp and cool conditions!

January Temperature in Happy Valley

In January in Happy Valley, the average temperature is 5°C (41°F). The maximum can reach 15°C (59°F), while the minimum can drop as low as -13°C (10°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

January Weather in Happy Valley: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Happy Valley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Happy Valley, January typically has an average temperature of 5°C (41°F), with highs reaching up to 15°C (59°F) and lows dropping to around -13°C (10°F).
JanFebMarAprMayJunJulAugSepOctNovDec414146515864697064534641
Data source: Temperature data for Happy Valley 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 Happy Valley

In Happy Valley in January, the total precipitation amount is 203 mm (8.0 in) spread out over 17 days.

January Precipitation Trends in Happy Valley

The chart displays monthly precipitation patterns in Happy Valley, 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 Happy Valley, January typically receives around 203 mm (8.0 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec203228161142715971083155207233
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Happy Valley

In Happy Valley in January, humidity is 85%. With an average temperature of 5°C (41°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration a challenge as the cold air clings to your skin.

January Average Humidity in Happy Valley

This chart illustrates the average monthly humidity levels in Happy Valley, 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 Happy Valley is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%85%83%83%84%82%74%71%81%87%87%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Happy Valley

In Happy Valley 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 Happy Valley, you can visit Hourly UV Index in Happy Valley.

Maximum UV Index Levels in Happy Valley for January

The chart shows the monthly maximum UV Index (UVI) for Happy Valley 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 Happy Valley typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2356991087532
Data source: Happy Valley 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 Happy Valley Compares to Other Months

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

This table compares monthly weather conditions in Happy Valley, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)203 mm (8.0 inches)85%low
February Weather5°C (41°F)227 mm (9.0 inches)84%moderate
March Weather8°C (46°F)161 mm (6.3 inches)85%moderate
April Weather11°C (51°F)142 mm (5.6 inches)83%high
May Weather14°C (58°F)71 mm (2.8 inches)83%very high
June Weather18°C (64°F)59 mm (2.3 inches)83%very high
July Weather21°C (69°F)7 mm (0.3 inches)82%very high
August Weather21°C (70°F)10 mm (0.4 inches)74%very high
September Weather18°C (64°F)83 mm (3.3 inches)71%high
October Weather11°C (53°F)155 mm (6.1 inches)81%moderate
November Weather8°C (46°F)207 mm (8.1 inches)87%moderate
December Weather5°C (41°F)233 mm (9.2 inches)87%low

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