December Weather in Summerlin South, United States

Last updated: June 24, 2025

In December, the average temperature in Summerlin South, United States is a cool 8°C (46°F), with a variance between a chilly -3°C (27°F) and a warm 23°C (73°F). Expect about 17 mm (0.7 in) of precipitation over 3 days, accompanied by an average humidity of 75%. Whether you prefer layering up for the chill or enjoying the milder days, December in Summerlin South has a bit of everything!

December Temperature in Summerlin South

In December in Summerlin South, the average temperature is 8°C (46°F). The maximum can reach 23°C (73°F), while the minimum can drop as low as -3°C (27°F). Be prepared for varied weather conditions, making it essential to pack layers for your trip.

December Weather in Summerlin South: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Summerlin South, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Summerlin South, December typically has an average temperature of 8°C (46°F), with highs reaching up to 23°C (73°F) and lows dropping to around -3°C (27°F).

Data source: Temperature data for Summerlin South generated using information from the Copernicus Climate Change Service.

December Precipitation in Summerlin South

In Summerlin South in December, the precipitation amount is 17 mm (0.7 in) over the course of 3 days.

December Precipitation Trends in Summerlin South

The chart displays monthly precipitation patterns in Summerlin South, 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 Summerlin South, December typically receives around 17 mm (0.7 inches) of precipitation spread over approximately 3 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Summerlin South

In Summerlin South in December, humidity is 75%. With an average temperature of 8°C (46°F), this humidity feels like a brisk chill that invigorates your senses, making outdoor adventures both refreshing and slightly uncomfortable.

December Average Humidity in Summerlin South

This chart illustrates the average monthly humidity levels in Summerlin South, 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 Summerlin South is approximately 75%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Summerlin South

In Summerlin South 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 Summerlin South, you can check the information here.

Maximum UV Index Levels in Summerlin South for December

The chart shows the monthly maximum UV Index (UVI) for Summerlin South 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 Summerlin South typically reaches 3, which falls under the moderate exposure category.

Data source: Summerlin South 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 Summerlin South Compares to Other Months

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

This table compares monthly weather conditions in Summerlin South, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (47°F)	19 mm (0.7 inches)	76%	moderate
February Weather	9°C (49°F)	22 mm (0.9 inches)	80%	high
March Weather	13°C (56°F)	19 mm (0.8 inches)	69%	very high
April Weather	19°C (66°F)	6 mm (0.2 inches)	57%	very high
May Weather	23°C (73°F)	8 mm (0.3 inches)	45%	extreme
June Weather	30°C (86°F)	1 mm (0.0 inches)	34%	extreme
July Weather	32°C (91°F)	17 mm (0.7 inches)	29%	extreme
August Weather	32°C (90°F)	11 mm (0.4 inches)	28%	extreme
September Weather	27°C (81°F)	5 mm (0.2 inches)	41%	very high
October Weather	19°C (66°F)	4 mm (0.2 inches)	54%	high
November Weather	13°C (56°F)	13 mm (0.5 inches)	68%	moderate
December Weather	8°C (46°F)	17 mm (0.7 inches)	75%	moderate