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December Weather in Pasco, United States

Last updated: June 24, 2025

In December, the average temperature in Pasco, United States hovers around 2°C (36°F). Expect a minimum of -9°C (17°F) and a pleasant maximum of 20°C (68°F). During this month, precipitation typically reaches 35 mm (1.4 in) over approximately 8 days, accompanied by an average humidity of 86%. Prepare for a refreshing experience!

December Temperature in Pasco

In December in Pasco, the average temperature is 2°C (36°F). Maximums can reach 20°C (68°F), while minimums can drop to as low as -9°C (17°F). Be prepared for a wide range of temperatures when traveling to Pasco during this time.

December Weather in Pasco: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Pasco, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Pasco, December typically has an average temperature of 2°C (36°F), with highs reaching up to 20°C (68°F) and lows dropping to around -9°C (17°F).
JanFebMarAprMayJunJulAugSepOctNovDec353746556674818069544336
Data source: Temperature data for Pasco 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.

December Precipitation in Pasco

In Pasco in December, the precipitation amount is 35 mm (1.4 in) over the course of 8 days.

December Precipitation Trends in Pasco

The chart displays monthly precipitation patterns in Pasco, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Pasco, December typically receives around 35 mm (1.4 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec3945322615100312273735
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Pasco

In Pasco in December, humidity is 86%. With an average temperature of 2°C (36°F), this humidity feels like a biting chill that clings to your skin, making outdoor exploration uncomfortable and dampening any enthusiasm for travel.

December Average Humidity in Pasco

This chart illustrates the average monthly humidity levels in Pasco, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Pasco is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%86%86%82%77%79%77%62%60%80%87%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Pasco

In Pasco in December, 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 Pasco, you can visit Hourly UV Index in Pasco.

Maximum UV Index Levels in Pasco for December

The chart shows the monthly maximum UV Index (UVI) for Pasco in December, 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 December, the maximum UV index in Pasco typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2356991097532
Data source: Pasco December 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 December Weather in Pasco Compares to Other Months

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

This table compares monthly weather conditions in Pasco, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)39 mm (1.5 inches)85%low
February Weather3°C (37°F)45 mm (1.8 inches)86%moderate
March Weather8°C (46°F)32 mm (1.3 inches)86%moderate
April Weather13°C (55°F)26 mm (1.0 inches)82%high
May Weather19°C (66°F)15 mm (0.6 inches)77%very high
June Weather23°C (74°F)10 mm (0.4 inches)79%very high
July Weather27°C (82°F)0 mm (0.0 inches)77%very high
August Weather27°C (80°F)3 mm (0.1 inches)62%very high
September Weather20°C (69°F)12 mm (0.5 inches)60%high
October Weather12°C (54°F)27 mm (1.1 inches)80%moderate
November Weather6°C (43°F)37 mm (1.5 inches)87%moderate
December Weather2°C (36°F)35 mm (1.4 inches)86%low

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