nomadseason

December Weather in Morgan Hill, United States

Last updated: June 24, 2025

In December, the weather in Morgan Hill, United States presents a mild average temperature of 9°C (49°F). Expect a range where the minimum can dip to a crisp -2°C (29°F), while the maximum may reach a pleasant 24°C (75°F). Visitors should prepare for 98 mm (3.9 in) of precipitation spread over 9 days, contributing to an average humidity of 80%.

December Temperature in Morgan Hill

In December in Morgan Hill, the average temperature is 9°C (49°F). The maximum can reach 24°C (75°F), while the minimum can drop as low as -2°C (29°F). Be sure to pack for a range of temperatures to fully enjoy your stay!

December Weather in Morgan Hill: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Morgan Hill, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Morgan Hill, December typically has an average temperature of 9°C (49°F), with highs reaching up to 24°C (75°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec495052566066697068635448
Data source: Temperature data for Morgan Hill generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Morgan Hill

In Morgan Hill in December, the precipitation amount is 98 mm (3.9 in) spread over a duration of 9 days.

December Precipitation Trends in Morgan Hill

The chart displays monthly precipitation patterns in Morgan Hill, 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 Morgan Hill, December typically receives around 98 mm (3.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec12811010132221002244098
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Morgan Hill

In Morgan Hill in December, humidity is 80%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and prompting a need for layered clothing to stay comfortable while traveling.

December Average Humidity in Morgan Hill

This chart illustrates the average monthly humidity levels in Morgan Hill, 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 Morgan Hill is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%84%82%78%71%64%59%54%55%62%78%80%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Morgan Hill

In Morgan Hill in December, 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 Morgan Hill, you can check the information here.

Maximum UV Index Levels in Morgan Hill for December

The chart shows the monthly maximum UV Index (UVI) for Morgan Hill 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 Morgan Hill typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec4589111111109753
Data source: Morgan Hill 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 Morgan Hill Compares to Other Months

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

This table compares monthly weather conditions in Morgan Hill, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (49°F)128 mm (5.0 inches)82%moderate
February Weather10°C (50°F)110 mm (4.3 inches)84%moderate
March Weather11°C (52°F)101 mm (4.0 inches)82%very high
April Weather13°C (56°F)32 mm (1.3 inches)78%very high
May Weather15°C (60°F)22 mm (0.9 inches)71%extreme
June Weather19°C (66°F)1 mm (0.0 inches)64%extreme
July Weather20°C (69°F)0 mm (0.0 inches)58%extreme
August Weather21°C (70°F)0 mm (0.0 inches)54%very high
September Weather20°C (68°F)2 mm (0.1 inches)55%very high
October Weather17°C (63°F)24 mm (1.0 inches)62%high
November Weather12°C (55°F)39 mm (1.6 inches)78%moderate
December Weather9°C (49°F)98 mm (3.9 inches)80%moderate

Compare Morgan Hill's Climate with Cities Worldwide