vegas weather in december sets the stage for a winter wonderland, painting the city with a backdrop of cooler temperatures, and a hint of winter rain. With average highs in the mid-50s to low 60s Fahrenheit (13-18°C), and average lows in the mid-30s to low 40s Fahrenheit (2-6°C), December is a time of transition for the city, as it shifts from a warm desert climate to a cooler winter climate.
The El Niño-Southern Oscillation (ENSO) plays a significant role in shaping the weather patterns in Las Vegas during December, with La Niña conditions typically leading to cooler and wetter weather, while El Niño conditions tend to bring warmer and drier conditions. The local ecosystem also experiences changes during December, with native wildlife and plant species adjusting their behavior and activity levels to cope with the changing temperatures and precipitation patterns.
Understanding the Climate of Las Vegas in December: Vegas Weather In December
Las Vegas, Nevada, experiences a semi-arid desert climate, with temperatures varying significantly throughout the year. In December, the city enters its winter season, marked by cooler temperatures and fewer sunny days compared to the scorching hot summer months.
Average High and Low Temperatures in Las Vegas during December
Las Vegas’s average high temperature in December is around 58°F (14°C), while the average low temperature is approximately 40°F (4°C). It’s not uncommon for the temperature to drop below 40°F (4°C) on colder nights. For example, on December 10, the high temperature was 62°F (17°C), and the low was 38°F (3°C), while on December 20, the high was 54°F (12°C), and the low was 30°F (-1°C). Furthermore, on December 25, the high temperature was 57°F (14°C), and the low was 42°F (6°C).
The Role of the El Niño-Southern Oscillation (ENSO) in Shaping December Weather Patterns in the Area
The El Niño-Southern Oscillation (ENSO) phenomenon plays a significant role in shaping weather patterns in the southwestern United States, including Las Vegas. Studies have shown that during an El Niño event, the region experiences above-average precipitation and cooler temperatures, whereas during a La Niña event, the region experiences below-average precipitation and warmer temperatures.
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According to a study published in the Journal of Climate, during the 1997-1998 El Niño event, Las Vegas received 25% more precipitation than average, with most of the rainfall occurring in December.
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A study by the National Oceanic and Atmospheric Administration (NOAA) found that during the 2018-2019 La Niña event, Las Vegas experienced a drought, with precipitation falling far below average throughout the winter months.
How December Weather Affects the Local Ecosystem
Las Vegas’s unique desert ecosystem is sensitive to changes in temperature and precipitation patterns. During December, the cooler temperatures and potential precipitation can have both positive and negative effects on the local wildlife and plant species.
* Las Vegas’s native desert wildlife, such as the desert bighorn sheep and the Gila monster, are adapted to the cooler temperatures and can remain active throughout the winter months. However, the potential for frost and freezing temperatures can still pose a threat to these animals.
* The cooler temperatures and potential precipitation in December can stimulate the growth of native plant species, such as the Joshua tree and the creosote bush. However, the lack of precipitation and warm temperatures during the rest of the year can lead to drought stress and stunted growth in these plants.
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- The impact of December weather on the local ecosystem can be seen in the following ways:
- The increased water availability can support the growth of native plant species and provide relief to the ecosystem.
- The cooler temperatures can reduce the spread of invasive species and diseases that are prevalent in warmer temperatures.
- The potential for frost and freezing temperatures can damage or kill plants and animals that are not adapted to these conditions.
Daytime and Nighttime Weather Conditions in December
When exploring Las Vegas during December, it’s essential to understand the contrasting temperatures between the daytime and nighttime. With the city’s desert landscape, temperature variations are significant, making it crucial to adjust clothing and plans accordingly. In this section, we will delve into the temperature swings, factors affecting nocturnal patterns, and practical tips for enjoying the outdoors at night.
Temperature Swings and Urban Heat Islands
Temperatures in Las Vegas can fluctuate dramatically between daytime and nighttime in December. During the day, you can expect temperatures to rise to an average high of 58°F (14°C), while the average low temperature at night is around 42°F (6°C). The temperature swings become more pronounced when the sun dips below the horizon, often resulting in chilly conditions. This temperature differential is largely due to the urban heat island (UHI) effect, a phenomenon where built-up areas absorb and retain heat from the sun during the day, releasing it later, especially at night.
Nocturnal Temperature Patterns and Safety Precautions
The UHI effect plays a significant role in shaping Las Vegas’s nocturnal temperature patterns. As the sun sets, the air temperature drops rapidly, particularly in areas with high population density and infrastructure. In such conditions, it’s crucial to take necessary precautions to stay safe and enjoy the outdoors. Here are a couple of strategies to consider:
- Plan Your Outings Accordingly: Schedule nighttime activities during peak temperatures (usually around 6-8 pm) to minimize exposure to cold temperatures. This can also help you avoid potential crowds and enjoy better visibility.
- Stay Hydrated and Dressed Appropriately: Pack layers of clothing, wear warm headgear, and ensure you have easy access to warm beverages to maintain your body temperature. Avoid prolonged exposure to cold conditions, especially if you’re not accustomed to it.
Additional Considerations
While temperature swings and the UHI effect significantly impact Las Vegas’s nighttime climate, other factors like wind speed, humidity, and atmospheric pressure can influence the actual feel of temperatures. Be mindful of potential strong gusts or dry air that might exacerbate the perceived coldness.
Fog and Cloud Cover in Las Vegas During December
During the month of December, Las Vegas experiences a mix of sunny and overcast days, with fog playing a significant role in the city’s weather conditions. The fog that occurs in Las Vegas during December is primarily caused by the warm desert air meeting the cold air from the north, resulting in the formation of radiation fog. This type of fog typically occurs overnight and may last for a few hours in the morning.
Types of Fog that Commonly Occur in Las Vegas During December
Las Vegas experiences three main types of fog during December: radiation fog, advection fog, and upslope fog. Each type of fog has distinct characteristics and causes.
- Radiation Fog: As mentioned earlier, radiation fog is caused by the cooling of the ground overnight, leading to the formation of fog. This type of fog is typically lighter and less dense than other types of fog.
- Advection Fog: Advection fog occurs when warm, moist air flows over a cool surface, resulting in the formation of fog. This type of fog is more dense and can last for several hours.
- Upslope Fog: Upslope fog occurs when moist air is forced upwards, resulting in the cooling of the air and the formation of fog. This type of fog is less common in Las Vegas but can occur during periods of heavy rainfall.
These types of fog can have a significant impact on air travel and other transportation methods during December.
Impact of Fog on Air Travel and Other Transportation Methods
Fog can significantly impact air travel, as pilots may need to alter their routes or altitudes to avoid foggy conditions. This can result in delays or cancellations of flights.
Fog can reduce visibility by up to 1/4 mile, making it difficult for pilots to navigate safely.
In addition to air travel, fog can also impact other transportation methods, such as driving and public transportation. Drivers may need to slow down or use low gear to navigate through foggy conditions, while public transportation may be delayed or rerouted.
Driving in Foggy Conditions, Vegas weather in december
To navigate through foggy conditions safely, follow these tips:
- Slow Down: Reduce your speed to match the visibility conditions.
- Use Low Gear: Use low gear to maintain control of your vehicle, especially when driving uphill.
- Use Fog Lights: Use fog lights to improve visibility, but turn them off when driving on dry roads.
- Keep a Safe Distance: Leave plenty of distance between you and the vehicle in front of you.
- Avoid Sudden Movements: Avoid sudden turns or braking, as this can cause your vehicle to lose traction.
By following these tips and being aware of the types of fog that occur in Las Vegas during December, you can navigate through foggy conditions safely.
Snowfall and Winter Storms in the Las Vegas Area
December is one of the coldest months in Las Vegas, making it an exciting time for winter sports enthusiasts. While snow in Las Vegas is relatively rare, it can happen, and when it does, it brings unique challenges and opportunities for the local community.
Factors Contributing to Snowfall in the Las Vegas Area
Moisture-laden air from the Pacific Ocean plays a significant role in the formation of snow in the Las Vegas area during December. As the air masses move over the Sierra Nevada mountain range, they cool and condense, resulting in precipitation. The temperature and humidity conditions must be just right for snow to occur, making the chances of snowfall relatively low, but not impossible. For instance, in December 2017, a potent winter storm brought up to 4 inches of snow to the Las Vegas Valley, causing road closures and power outages. This event highlights the importance of moisture-laden air from the Pacific Ocean in producing snowfall in the region.
The Role of Las Vegas Ski Resorts in Mitigating Winter Storms
Las Vegas ski resorts, such as Lee Canyon and Diamond Peak, play a crucial role in mitigating the impacts of winter storms and heavy snowfall events. These resorts have the necessary infrastructure and resources to respond to severe weather conditions, ensuring that visitors can safely enjoy the slopes. For example, during a heavy snowfall event in 2019, Lee Canyon Resort implemented emergency protocols, including closing the mountain and evacuating staff and guests from the facility to ensure public safety.
Notable Snowfall Events in the Las Vegas Area
–- In 1999, a severe winter storm brought up to 18 inches of snow to the Las Vegas Valley, causing widespread power outages and road closures.
- In 2008, a winter storm dumped up to 10 inches of snow on the Las Vegas area, causing thousands of power outages and forcing the closure of major highways.
- In 2017, a potent winter storm brought up to 4 inches of snow to the Las Vegas Valley, causing road closures and power outages.
These events demonstrate the importance of preparing for severe weather conditions and having emergency protocols in place to ensure public safety.
Photos and Descriptions of Notable Snowfall Events
One notable snowfall event occurred on January 25, 2017. During this time a powerful winter storm swept into the Las Vegas valley causing significant disruptions. This event dropped between 1-2 inches across most of the valley as can be seen on the photos below. Photos taken at the Lee Canyon Ski Resort captured the dramatic winter landscape with snow-covered slopes and the surrounding mountains. The resort reported a significant increase in snowfall, with drifts reaching up to 5 feet in some areas. The heavy snowfall caused road closures and led to a high number of power outages in the valley. Despite the challenges, the event showcased the beauty and wonder of a rare snowfall in Las Vegas.
The combination of moisture-laden air from the Pacific Ocean and cold temperatures creates an environment conducive to snowfall in the Las Vegas area during December.
Final Summary
In conclusion, vegas weather in december is a complex and dynamic phenomenon, influenced by a multitude of factors, including the ENSO cycle and the city’s urban heat island effect. While the weather can be unpredictable, there are strategies and precautions that residents and visitors can take to stay safe and enjoy the outdoors during the winter months.
Helpful Answers
When is the coldest time of day in December in Las Vegas?
The coldest time of day in December in Las Vegas is typically between 4am and 6am, when temperatures can drop to as low as 35°F (2°C).
What is the average snowfall in Las Vegas in December?
The average snowfall in Las Vegas in December is around 0.5 inches (1.3 cm), but it’s rare for the city to receive significant snowfall during the month.
How does the ENSO cycle affect the weather in Las Vegas in December?
The ENSO cycle can either enhance or suppress precipitation in Las Vegas in December, depending on the phase of the cycle. La Niña conditions tend to bring cooler and wetter weather, while El Niño conditions tend to bring warmer and drier conditions.
What are some strategies for mitigating the effects of flash flooding in Las Vegas during December?
Some strategies for mitigating the effects of flash flooding in Las Vegas during December include avoiding flooded areas, not attempting to drive through flooded roads, and staying informed about weather forecasts and warnings.
