Rosario Climate & Monthly Temperature Overview – Philippines

Temperature and Precipitation

Rosario enjoys a tropical climate characterized by consistent warmth throughout the year. The annual average temperature hovers around 84°F (29°C), with highs reaching the mid-80s and lows dip to the mid-70s. Precipitation is also relatively consistent, with an average annual rainfall of about 70 inches (1,778 mm), distributed fairly evenly throughout the year. However, there is a slight increase in rainfall during the monsoon season from June to October.

Seasonal Variations

While temperatures remain fairly constant in Rosario, seasonal variations in rainfall are more noticeable. The dry season runs from November to April, during which time rainfall is relatively scarce. This period is often characterized by clear skies and warm, sunny days. In contrast, the wet season lasts from May to October and brings with it an increase in precipitation. During this time, heavy rainfall and occasional thunderstorms are common. However, even during the wet season, there are still plenty of sunny breaks and opportunities for outdoor activities. Additionally, typhoons occasionally pass through the Philippines, bringing strong winds and heavy rain.

Monthly Temperature Variations

The average temperature in Rosario, Philippines, varies significantly throughout the year, reflecting the country’s tropical climate. During the warmest months, April and May, the average temperature hovers around 29°C (84°F). However, during the relatively cooler months, December and January, the average temperature drops to around 25°C (77°F).

Seasonal Differences

Rosario experiences two distinct seasons: the dry season and the rainy season. The dry season, which lasts from November to April, is characterized by lower humidity and less rainfall. During this period, temperatures tend to be slightly higher, with the average temperature reaching 28°C (82°F). The rainy season, on the other hand, runs from May to October and brings higher humidity and increased rainfall. During this time, the average temperature is slightly lower, at 26°C (79°F).

Cloud Classification in Rosario, Philippines

Rosario, Philippines is located in the province of La Union, which is situated in the northwestern part of the country. The town has a tropical climate, with an average temperature of 27°C. The climate is influenced by the Northeast Monsoon and the Southwest Monsoon. The Northeast Monsoon brings cold and dry winds, while the Southwest Monsoon brings warm and humid winds. The town experiences heavy rainfall during the months of May to October.

The cloud types that are commonly seen in Rosario during the Northeast Monsoon are cirrus, cirrocumulus, cirrostratus, altocumulus, and altostratus. These clouds are typically high in the atmosphere and are made of ice crystals. During the Southwest Monsoon, the cloud types that are commonly seen are cumulus, stratocumulus, nimbostratus, and cumulonimbus. These clouds are typically low in the atmosphere and are made of water droplets.

Monthly Precipitation

Rosario, Philippines experiences a tropical wet and dry climate, characterized by abundant rainfall throughout the year and a pronounced dry season from November to April. During the wet season, from May to October, precipitation is heavy, with monthly rainfall averaging between 200 and 350 millimeters. The peak of the rainy season occurs from July to September, when the southwest monsoon brings copious moisture. During these months, rainfall can exceed 400 millimeters per month, leading to frequent floods and landslides.

Annual Precipitation

The annual precipitation in Rosario averages between 1,800 and 2,200 millimeters. The variability in precipitation is primarily due to the influence of the El Niño-Southern Oscillation (ENSO). During El Niño years, precipitation is generally below average, leading to drought conditions. In contrast, during La Niña years, precipitation is typically above average, resulting in increased flooding and landslides. The distribution of precipitation throughout the year is also influenced by local topography, with higher elevations receiving more rainfall than lower-lying areas.

Average Rainfall and Seasonal Distribution

Rosario, Philippines, experiences year-round rainfall, with an average annual precipitation of around 2,000 millimeters (79 inches). The rainiest months are typically May to October, during the southwest monsoon season, when moisture-laden winds from the Indian Ocean bring heavy showers and thunderstorms. Conversely, the driest months occur during the northeast monsoon season from December to March, when winds from the Pacific Ocean bring drier weather.

Extreme Rainfall Events and Impacts

While Rosario’s rainfall patterns are generally predictable, the town can occasionally experience extreme rainfall events, particularly during the monsoon season. These events can result in flash floods, landslides, and infrastructure damage. In 2020, for instance, a typhoon brought torrential rains that caused widespread flooding, displacing thousands of residents and damaging homes and roads. Such extreme events can have significant socioeconomic impacts, affecting transportation, livelihoods, and public health.

Historical Occurrence

Snowfall is a rare and ephemeral sight in the Philippines, a tropical country nestled in the equatorial belt. However, a remarkable exception occurred on January 16, 1971, in Rosario, a town in the province of Batangas. That day, a blanket of snow gracefully settled upon the grassy plains and rooftops, leaving behind a serene and awe-inspiring winter wonderland. The unprecedented snowfall was attributed to a strong easterly wind that carried cold air from the Siberian high-pressure system, resulting in a sharp drop in temperatures and the condensation of moisture into snowflakes.

Geological and Climatic Influences

The occurrence of snowfall in Rosario was not entirely unexpected due to its unique geographical and climatic conditions. Situated at an altitude of approximately 1,080 meters (3,543 feet) above sea level, Rosario experiences cooler temperatures than coastal areas. Additionally, the presence of the Sierra Madre mountain range to the east served as a cold front, further exacerbating the temperature drop. Notably, the snowfall event in Rosario was not limited to the town itself; neighboring areas, such as Lipa City and San Jose, also witnessed a light dusting of snow, adding to the extraordinary nature of this meteorological phenomenon.

Average Sunshine Duration

Rosario, Philippines experiences a significant amount of sunshine throughout the year. The average daily sunshine duration ranges from 8 to 10 hours. During the wet season (June to November), cloud cover can reduce sunshine hours, but clear skies and sunshine remain common. The driest season (December to May) typically offers the most sunshine, with daily averages exceeding 9 hours.

Seasonal Variations

The sun’s position relative to the Earth’s axis influences seasonal variations in sunshine duration. During the summer months (March to May), the sun is higher in the sky, resulting in longer days and increased sunlight. Conversely, during the winter months (December to February), the sun is lower in the sky, leading to shorter days and less sunshine. Despite these seasonal variations, Rosario generally has ample sunshine year-round, providing ample opportunities for outdoor activities and vitamin D absorption.

Moon Phases in Rosario, Philippines

In Rosario, Philippines, the moon goes through various phases throughout the month, affecting the tides and providing different levels of illumination. The new moon, when the moon is not visible from Earth, occurs approximately every 29.5 days. During this phase, the sky is typically dark and starlit. The first quarter moon, when the moon is half illuminated, occurs about a week after the new moon. The full moon, when the entire moon is visible, occurs approximately two weeks after the new moon, casting a bright glow over the landscape. The last quarter moon, when the moon is again half illuminated, occurs about a week after the full moon.

Cultural Significance of the Moon

The moon has played a significant role in the culture of Rosario, Philippines. Farmers have traditionally used the moon’s phases to determine the best time to plant and harvest crops. The full moon is often associated with increased fishing activity, as fish are said to be more abundant during this phase. Additionally, the moon is featured in various folklore and legends, such as the story of the moon goddess Haliya, who is believed to descend to Earth during the full moon. The moon also serves as a timepiece, with many Filipinos using the moon’s position in the sky to tell the approximate time of night.

Humidity in Rosario, Philippines

Rosario, located in the province of Batangas in the Philippines, experiences a humid climate throughout the year. The average relative humidity ranges from 75% to 85%, with higher humidity levels during the rainy season from June to September. During this period, the air becomes heavy and moisture-laden, often leading to discomfort and heat exhaustion.

High humidity in Rosario can also contribute to the spread of mold and mildew, especially in poorly ventilated areas. It can exacerbate respiratory issues such as asthma and allergies, as the damp air can irritate the lungs and nasal passages. Additionally, high humidity can make it difficult for the body to regulate its temperature, leading to heat stroke and dehydration.

Wind Patterns in Rosario, Philippines

Rosario, located in the province of Batangas in the Philippines, experiences a distinct wind pattern throughout the year. During the northeast monsoon season from October to April, strong winds known as the “amihan” prevail from the northeast direction. These winds are typically cool and dry, resulting in a pleasant and refreshing climate. During this time, the average wind speed ranges from 10 to 15 knots.

Seasonal Variations in Wind Speed

During the southwest monsoon season from May to September, the wind direction shifts to southwest, bringing warm and humid air from the Pacific Ocean. These winds, known as the “habagat,” are characterized by lower speeds compared to the northeast monsoon. The average wind speed during the southwest monsoon season typically ranges from 5 to 10 knots. However, occasional thunderstorms can bring gusty winds and heavy rainfall. In the transitional months between the monsoon seasons, Rosario experiences variable wind directions and speeds, with occasional calm periods.

Ideal Weather Conditions for a Memorable Visit

The best time to visit Rosario in the Philippines is during the dry season, which typically runs from November to April. During this period, the weather is generally sunny and dry, with minimal chances of rainfall. The average temperature ranges from a comfortable 25 to 28 degrees Celsius, making it ideal for outdoor activities and sightseeing. The clear skies also offer stunning views of the surrounding mountains and seascapes.

Avoidance of Peak Season Crowds

While Rosario is a year-round destination, it’s worth considering visiting during the shoulder months of May, October, and November. During these months, the weather is still favorable, with fewer crowds and lower prices on accommodation and activities. This allows visitors to enjoy a more relaxed and intimate experience without the hustle and bustle of peak season.

Potential and Benefits

Rosario, Philippines possesses significant potential for solar energy development. The municipality experiences high levels of solar insolation throughout the year, with an average of 5.5 kWh/m2/day. This abundance of sunshine makes solar power a viable and cost-effective energy source for Rosario. By harnessing solar energy, the municipality can reduce its reliance on fossil fuels, mitigate air pollution, and contribute to a cleaner and more sustainable environment.

Existing Projects and Future Plans

Currently, Rosario has several solar energy projects in operation or under development. One notable project is the Rosario Solar Power Plant, a 2.5 MW facility that provides clean and renewable electricity to the municipality. Additionally, the municipal government has implemented a rooftop solar program, encouraging residents and businesses to install solar panels on their properties. As Rosario continues to invest in solar energy, it aims to further increase its share of renewable energy and achieve energy independence in the future.

Terrain and Elevation

Rosario, Philippines exhibits a diverse topography characterized by a mix of flatlands and mountainous terrain. The municipality is primarily situated within the Central Luzon Plain, which extends along the coastal region. This area is characterized by vast, low-lying agricultural lands with minimal elevation. However, as one moves inland, the landscape gradually transforms into rolling hills and eventually culminates in the rugged Zambales Mountains to the west. Mount Santa Fe, the highest peak in Rosario, rises to an elevation of 1,219 meters (4,000 feet) above sea level and offers breathtaking panoramic views.

Hydrography and Drainage

Rosario is blessed with an extensive network of rivers and streams that play a vital role in shaping its topography. The Guagua River, a major tributary of the Pampanga River, flows through the western portion of the municipality and serves as a natural boundary. Other notable rivers include the San Fernando River, which originates from the Zambales Mountains, and the Arayat River, which flows along the eastern border. These waterways provide water for irrigation, agriculture, and domestic use while also contributing to the scenic beauty of the region. Additionally, several lakes and swamps are found within Rosario, including the Rosario Lake and the Sapang Palay Swamp, which are important habitats for diverse flora and fauna.

Francisco B. Reyes Airport (USU)

Francisco B. Reyes Airport (IATA: USU, ICAO: RPUU), also known as Busuanga Airport, is the primary airport serving the island of Busuanga and the municipality of Coron in the province of Palawan. It is located in the town of Busuanga, approximately 15 kilometers from Coron town proper. The airport is named after the late Secretary of Transportation and Communications, Francisco B. Reyes.

Airport Infrastructure and Facilities

Francisco B. Reyes Airport has a single runway that is 1,300 meters long and 30 meters wide. The airport terminal building is relatively small, with limited facilities. However, it includes essential amenities such as a check-in area, baggage claim, and a small waiting area. There are also several food and beverage outlets and retail shops within the terminal. The airport is undergoing expansion and improvement to accommodate the increasing number of passengers and tourism growth in the Coron area.

Historical Significance:

Rosario, a municipality in the Northern Samar province of the Philippines, holds significant historical importance. Its roots trace back to the 16th century, when Spanish missionaries arrived in the area and established a Catholic mission. The town was founded in 1768 and named after Our Lady of the Rosary (Nuestra Señora del Rosario). During the Philippine-American War, Rosario played a pivotal role as it was the site of a battle between Filipino revolutionaries and American forces. The municipality commemorates its past through historical markers and landmarks, preserving its heritage for generations to come.

Economic and Cultural Vitality:

Rosario is a thriving municipality with a diverse economy and rich cultural traditions. Agriculture remains a primary source of income, with residents cultivating rice, corn, and coconuts, among other crops. The town is also known for its fishing industry, with local fishermen venturing into the coastal waters in search of sustenance. In recent years, Rosario has witnessed growth in tourism, with visitors drawn to its pristine beaches, scenic landscapes, and historical sites. The municipality hosts various cultural events throughout the year, including festivals, religious processions, and traditional dances, fostering a vibrant and lively community.