Rancho Cucamonga, California – Climate and Average Weather Year Round: A Comprehensive Guide

Rancho Cucamonga, California, experiences a warm and pleasant climate year-round, making it a great place to visit or live.

The city enjoys hot, dry summers with temperatures often reaching the high 80s to mid-90s Fahrenheit.

In contrast, winters remain mild with temperatures rarely dipping below 40°F, offering a comfortable escape from harsher winter climates.

Throughout the year, Rancho Cucamonga sees varying daylight hours and weather conditions.

The brightest month, June, averages 8.6 kWh of daily sunlight, while December stands as the darkest month with around 3.1 kWh.

For those curious about rainfall, June records the least rain, averaging just 0.04 inches.

This city’s climate data reflect typical patterns in the northern hemisphere, providing a reliable snapshot for planning activities or understanding weather trends. Learn more about Rancho Cucamonga’s climate as you explore its appealing year-round conditions.

Average Temperature In Rancho Cucamonga, California

Rancho Cucamonga has a warm and pleasant climate year-round. The temperature varies from 43°F to 94°F.

Summers are hot and dry. The average high in summer can reach 94°F, with temperatures occasionally climbing over 100°F.

Winters are mild and cooler. The average low in winter is around 43°F, rarely dipping below 35°F.

Daytime temperatures are quite high during summer, which can be a perfect time for outdoor activities.

Even in winter, the temperatures remain comfortable, making the area suitable for various activities throughout the year.

Rain is scarce, leading to dry conditions much of the time.

Those planning to visit or move to Rancho Cucamonga will find that the temperature ranges rather comfortably with mild winters and hot, dry summers.

Understanding the average temperature can help in making informed decisions about clothing, lifestyle, and energy usage in this region.

Average Precipitation In Rancho Cucamonga, California

Rancho Cucamonga experiences different kinds of precipitation throughout the year, with distinct patterns for both rain and snow.

Average Rainfall In Rancho Cucamonga, California

Rancho Cucamonga receives approximately 38 inches of rain per year. The wettest month is December, with an average of 98 mm of precipitation.

Rain mostly occurs in the winter months, with very little rainfall during the summer.

June typically sees the least rain, often collecting just 0.04 inches.

Rainfall days are about 36 days per year, so expect a dry climate most of the time. Heavy rain is uncommon, often contributing to the city’s reputation for having clear and sunny weather.

Average Snow In Rancho Cucamonga, California

Snow is extremely rare in Rancho Cucamonga, which averages 0 inches annually. The city experiences mild winters, making snowfall almost nonexistent. The average yearly temperatures do not drop low enough for snow formation.

Compared to the U.S. average of 28 inches of snow per year, Rancho Cucamonga stands out for its lack of snow.

Residents and visitors can expect clear roads and pleasant winter days without dealing with sleet, hail, or snow-related hazards.

Average Sun In Rancho Cucamonga, California

Rancho Cucamonga enjoys a good amount of sunshine throughout the year, making it a bright and sunny place to live or visit. The city experiences distinct changes in sunlight depending on the time of year.

Average Daily Shortwave Solar Energy In Rancho Cucamonga, California

The city sees varied levels of shortwave solar energy across different months.

June is the brightest month, with an average of 8.6 kWh of solar energy per day.

In contrast, December is the darkest month, averaging only 3.1 kWh.

Key Metrics:

• June: 8.6 kWh
• December: 3.1 kWh

Most days in Rancho Cucamonga are sunny with few clouds, contributing to around 205 sunny days per year.

This helps maintain a high UV index, meaning sunscreen is often necessary.

Sunny periods are generally longer in spring and summer, while shorter and cloudier in winter.

Understanding the sun patterns can benefit residents and visitors, allowing them to plan outdoor activities and protect themselves against sun exposure.

The ample sunlight also promotes outdoor tourism and a healthy lifestyle.

Average Humidity In Rancho Cucamonga, California

Rancho Cucamonga experiences varying levels of humidity throughout the year. Relative humidity measures the amount of moisture in the air compared to the maximum amount the air can hold at a given temperature.

Monthly Average Relative Humidity:

• January: 65%
• February: 60%
• March: 58%
• April: 55%
• May: 53%
• June: 50%
• July: 46%
• August: 45%
• September: 48%
• October: 50%
• November: 57%
• December: 62%

Dew Point:

• The dew point in Rancho Cucamonga generally varies. It can be higher in the winter and lower in summer.
• During winter months, the dew point can reach mid-40s°F. In summer, it might drop to mid-60s°F, reflecting drier air.

Daily Averages:

• Throughout the day, relative humidity can change.
• Morning hours often have higher humidity, around 70%, while afternoons, especially in summer, can drop to as low as 20% due to higher temperatures.

Rancho Cucamonga’s dry and arid summer months tend to have lower humidity levels which contributes to a crisp, dry climate.

Conversely, winter months see higher humidity, resulting in cooler and slightly damp conditions.

Average Wind In Rancho Cucamonga, California

Wind patterns in Rancho Cucamonga, California, play an essential role in the climate.

Wind Speed: Average wind speeds vary throughout the year. The city’s average wind speeds are typically between 5 to 10 miles per hour.

Wind Direction: Winds generally come from the west, although they can shift based on weather systems. This pattern contributes to the area’s dry climate.

Monthly Variations:

• Wind speeds can increase slightly during certain months, particularly in spring and fall.
• These periods can experience more gusty conditions compared to summer and winter.

Impact: Wind impacts the overall feel of the temperatures, even though the actual temperature might remain relatively stable, a strong wind can make it feel cooler.

Average Air Quality In Rancho Cucamonga, California

Rancho Cucamonga often experiences varying air quality throughout the year. The Air Quality Index (AQI) provides insight into these changes.

Common AQI Ratings:

• Good (0-50): Air quality is considered satisfactory, and air pollution poses little or no risk.
• Moderate (51-100): Air quality is acceptable; however, some pollutants may be a concern for a small number of people.
• Unhealthy for Sensitive Groups (101-150): Sensitive groups may experience health effects; the general public is likely not affected.
• Unhealthy (151-200): Everyone may begin to experience health effects; sensitive groups may experience more serious effects.
• Very Unhealthy (201-300): Health alert; everyone may experience more serious health effects.

On average, Rancho Cucamonga tends to fall in the Moderate range but can hit Unhealthy or Very Unhealthy levels due to factors like wildfires and heavy traffic.

Real-Time Data

• For real-time data, you can check AccuWeather.
• Another reliable source is The Weather Channel, which reports air quality regularly.

Pollutants to Monitor:

• Ozone: High during sunny days.
• Particulate Matter (PM2.5 and PM10): Often elevated during wildfires.

Additional Factors:

• Pressure: Normal range is around 29.92 inches of mercury (inHg), affecting how pollutants disperse.
• Visibility: Reduced when air quality is poor.

Staying updated on air quality helps residents plan their outdoor activities and protect their health. Routine checks on AQI can inform whether it’s safe to engage in strenuous outdoor activities.

Topography Of Rancho Cucamonga, California

Rancho Cucamonga is situated in San Bernardino County, California.

The area’s topography is varied, featuring a mix of elevations and terrain.

The average elevation is 1,768 feet (Rancho Cucamonga topography).

Elevations in the city range from 290 meters to 1,658 meters (Detailed topographic map).

The city’s landscape includes:

• Flat plains and rolling hills predominantly in lower elevations.
• Diverse terrain as the elevation increases towards the higher points.
• Ridge lines and natural formations contribute to varied landforms.

Rancho Cucamonga’s terrain impacts the local climate, influencing temperatures and precipitation levels.

Extreme Weather Events That Occur In Rancho Cucamonga, California

Rancho Cucamonga, California, experiences various extreme weather events.

Although the weather is mostly sunny and mild, certain times of the year can see significant deviations.

A notable example is the occasional earthquake. Recently, Rancho Cucamonga was hit by a 3.8 magnitude quake.

Earthquakes can cause sudden shifts and disruptions, impacting daily life.

High winds are another concern. The windiest month in Rancho Cucamonga typically sees speeds that can gust up to 20 mph.

These strong winds can bring debris and cause localized damage.

The area is also prone to electrical storms. These storms can be intense, accompanied by lightning, making them hazardous for those outdoors. For more on these events, check out information on electrical storms.

Although rare, tornadoes can occur. They are not as frequent as in other parts of the country but have been recorded, causing significant attention when they do happen.

In winter, temperatures can drop, leading to different challenges.

January is often the coldest month, with temperatures sometimes falling to freezing levels at night.

Conversely, July tends to be the hottest month.

Temperatures can rise past 95°F, presenting risks like heat exhaustion and wildfires due to dry conditions.

Such extremes make it crucial for residents to stay updated on weather forecasts and be prepared for sudden changes.

Keeping informed can help manage the impact of these weather events and maintain safety.

Best Time Of The Year To Visit Rancho Cucamonga, California

Rancho Cucamonga is known for its year-round comfortable climate. The best time to visit depends on what kind of weather and activities you enjoy. Here’s what to expect during each season:

What Is Rancho Cucamonga, California Like In Spring

In spring, temperatures range between 50°F at night and up to 75°F during the daytime.

March to May is an excellent time to visit because of the pleasant temperatures and blooming flowers.

Spring also marks the end of the rainy season, so visitors can expect drier days.

This season is ideal for outdoor activities such as hiking in the nearby San Gabriel Mountains or taking a walk in the Victoria Gardens.

What Is Rancho Cucamonga, California Like In Summer

Summers in Rancho Cucamonga are hot and dry, with temperatures often reaching the high 90s in July and August. The average high temperature in July is about 98.4°F.

Despite the heat, summer is still a popular time for outdoor festivals and events.

Visitors can explore the many parks and trails early in the morning or later in the evening to avoid the peak heat.

It’s also a good time to visit Victoria Gardens for some shopping or dining.

What Is Rancho Cucamonga, California Like In Fall

Fall, from September to November, is another great time to visit.

Temperatures cool down significantly, ranging from 60°F to 85°F. This season is particularly pleasant for outdoor activities as the weather remains dry.

September can still be quite warm, but by October and November, the temperatures become more moderate.

This is an excellent time to explore the Pacific Electric Trail or enjoy the changing colors of the leaves.

What Is Rancho Cucamonga, California Like In Winter

Winters in Rancho Cucamonga are mild and last from December to February.

Average temperatures in January range between 46°F at night to around 64°F during the day. This is the wet season, though it’s generally not too rainy.

February is the month with the most wet days, averaging about 5.3 days with precipitation.

Winter offers a refreshing break from the heat, making it a good time to visit for those who prefer cooler weather.

It’s also a great time to hike in the nearby mountains, with crisp, clear air and beautiful views.