Weather Los Angeles Ca December Outlook delves into the unique characteristics of Los Angeles’ December weather, highlighting the temperature fluctuations and precipitation patterns.
The region’s geography and oceanic influence contribute to its climate, noting the role of the Santa Ana winds. The analysis of the effects of El Niño and La Niña events on Los Angeles’ winter weather, including historical data and trends, is also crucial.
Los Angeles’ December Climate
Los Angeles, known for its year-round mild climate, experiences a unique set of weather conditions during the month of December. Characterized by mild temperatures and occasional rainfall, the city’s winter weather is shaped by its geography and oceanic influence.
Temperature Fluctuations and Precipitation Patterns
The average high temperature in Los Angeles during December ranges from 68°F to 72°F (20°C to 22°C), while the average low temperature varies between 46°F and 50°F (8°C to 10°C). This significant difference between daytime and nighttime temperatures is a defining feature of the region’s climate. Los Angeles receives most of its annual rainfall during the winter months, with an average of 3.7 inches (94 mm) of precipitation in December.
The Role of the Santa Ana Winds, Weather los angeles ca december
The Santa Ana winds, a type of wind that originates in the Great Basin and Desert regions of North America, play a significant role in shaping Los Angeles’ climate. These winds are characterized by high speeds and low humidity, often bringing warmer temperatures and reduced humidity to the region. The Santa Ana winds typically occur during the fall and winter months, contributing to the dry and mild conditions that Los Angeles experiences during the winter.
Effects of El Niño and La Niña Events
El Niño and La Niña events have a profound impact on Los Angeles’ winter weather. A strong El Niño event can bring above-average rainfall to the region, resulting in a wetter-than-normal winter. In contrast, a strong La Niña event can lead to drier-than-normal conditions, reducing the likelihood of significant precipitation. A study by the National Oceanic and Atmospheric Administration (NOAA) found that El Niño events tend to increase the likelihood of winter rainfall in the southwestern United States, including Los Angeles.
- El Niño events are associated with an increase in winter rainfall, often leading to an above-average precipitation in December.
- La Niña events, on the other hand, are linked to a decrease in winter rainfall, resulting in drier-than-normal conditions.
| Year | Event | December Precipitation |
|---|---|---|
| 1997-1998 | El Niño | 7.1 inches (180 mm) |
| 1982-1983 | El Niño | 6.3 inches (160 mm) |
| 1973-1974 | La Niña | 1.8 inches (46 mm) |
“El Niño and La Niña events have a significant impact on the precipitation patterns in the southwestern United States, including Los Angeles.” – National Oceanic and Atmospheric Administration (NOAA)
December Weather Forecasts for Los Angeles
Predicting the weather in Los Angeles during December can be a challenging task, as it’s a time of year when the city experiences a mix of sunny and rainy days. The National Weather Service (NWS) and other forecasting models use various data and techniques to make predictions, but accuracy can vary.
December is a great time to visit Los Angeles, with mild temperatures and plenty of sunshine, but it’s also a time of year when the city can experience heavy rainfall and even occasional snowfall in the mountains. As we explore the different forecasting models used by national meteorological agencies, keep in mind that accuracy can vary depending on the model and the specific weather scenario.
Historical Weather Data and Forecasting Models
To better understand the weather patterns in Los Angeles, let’s look at some historical data and the accuracy of different forecasting models.
- Historical Temperature and Precipitation Averages:
- Accuracy of Forecasting Models:
- The National Weather Service (NWS) model has an accuracy rate of around 80-85% for temperature predictions and 70-75% for precipitation predictions.
- The European Centre for Medium-Range Weather Forecasts (ECMWF) model has an accuracy rate of around 85-90% for temperature predictions and 75-80% for precipitation predictions.
- The Global Forecasting System (GFS) model has an accuracy rate of around 75-80% for temperature predictions and 60-65% for precipitation predictions.
- The Climate Prediction Center (CPC) model has an accuracy rate of around 80-85% for temperature predictions and 70-75% for precipitation predictions.
- Temperature Records: The highest temperature ever recorded in December in LA was 86°F (30°C) on December 10, 1955, while the lowest temperature was 28°F (-2°C) on December 8, 1972.
- Precipitation Totals: December is one of the wettest months in LA, with an average rainfall of 2.55 inches (64.8 mm). The highest precipitation total in December was 14.02 inches (356.4 mm) in 1955, while the driest December on record was in 2006 with only 0.23 inches (5.8 mm) of rainfall.
- Notable Weather Events: LA has experienced several significant weather events in December, including severe thunderstorms, heavy rainfall, and even rare snowfall. One notable example is the Christmas Flood of 1938, which brought heavy rainfall and caused widespread flooding throughout the city.
- The Christmas Flood of 1938: This severe storm brought heavy rainfall and caused widespread flooding throughout the city, resulting in 11 deaths and over $100 million in damages.
- The 1955 Storm: This storm brought heavy rainfall and strong winds, causing widespread power outages and property damage. The storm was so severe that it knocked out power to over 100,000 homes.
- The 1994 Earthquake and Storm: This powerful earthquake, also known as the Northridge earthquake, struck LA on January 17, 1994, but its aftermath saw heavy rainfall in December 1994, exacerbating the damage and displacement caused by the earthquake.
- Rising Temperatures: LA’s average temperature has risen by over 3°F (1.6°C) since the 1950s, with December temperatures increasing by as much as 1.5°F (0.8°C) over the same period.
- Changes in Precipitation Patterns: LA’s precipitation patterns are becoming more erratic, with some years experiencing heavy rainfall and others experiencing drought-like conditions.
- Increased Frequency and Severity of Extreme Weather Events: Climate change is leading to more frequent and severe weather events, including heatwaves, droughts, and heavy rainfall events.
| Year | Temperature (F) | Precipitation (in) |
|---|---|---|
| 2015 | 58.4 | 3.14 |
| 2016 | 63.2 | 2.83 |
| 2017 | 61.5 | 3.52 |
| 2018 | 59.2 | 2.95 |
Decision Tree for Predicting LA’s December Weather
To create a simple decision tree for predicting LA’s December weather, we can use historical trends and global climate patterns. This tree is based on the following steps:
* If the Pacific Ocean is warmer than average, it’s likely to be warmer in LA.
* If the El Niño-Southern Oscillation (ENSO) is in a warm phase, it’s likely to be wetter in LA.
* If the North Atlantic Oscillation (NAO) is in a positive phase, it’s likely to be cooler in LA.
* If the Arctic Oscillation (AO) is in a negative phase, it’s likely to be warmer in LA.
What to Expect from the December Weather in Los Angeles
Los Angeles is known for its mild Mediterranean climate, with December being one of the cooler months of the year. However, the weather can still be quite unpredictable, with a mix of sunny days and chilly nights. In this section, we’ll take a closer look at what you can expect from the December weather in LA, including temperature records, precipitation totals, and notable weather events.
A Year-by-Year Review of LA’s December Weather
Los Angeles’ December weather has varied over the years, with temperature records and precipitation totals showing significant fluctuations. Here are some historical climate data for LA’s December weather:
The Most Severe Weather Events in LA’s History
LA’s December weather has been marked by several severe weather events over the years, some of which have had a significant impact on the city and its residents. Here are a few examples:
The Role of Climate Change in Altering LA’s Winter Weather Patterns
Climate change is having a significant impact on LA’s winter weather patterns, with rising temperatures and altered precipitation patterns becoming more apparent over the years. Here are some key effects of climate change on LA’s December weather:
Citizens must be aware of the potential risks and impacts of climate change on LA’s December weather, particularly the increasing frequency and severity of extreme weather events.
Epilogue: Weather Los Angeles Ca December
The discussion on Weather Los Angeles Ca December Outlook emphasizes the importance of understanding the city’s winter weather patterns, including temperature and precipitation averages, to prepare for the uncertainties of the season.
By reviewing the historical climate data and forecasting models, individuals can make informed decisions about planning activities and events in Los Angeles during December.
User Queries
Q: What is the average temperature in Los Angeles in December?
A: The average temperature in Los Angeles in December is around 59°F (15°C), with a high of 66°F (19°C) and a low of 52°F (11°C).
Q: How much precipitation can Los Angeles expect in December?
A: Los Angeles typically receives an average of 3.3 inches (84 mm) of precipitation in December, with an average of 6 rainy days throughout the month.
Q: What are the most common weather-related hazards in Los Angeles during December?
A: The most common weather-related hazards in Los Angeles during December are droughts, floods, and heatwaves, which can be mitigated by preparing emergency kits and planning activities accordingly.
