Tempe Climate & Monthly Temperature Overview – United States

Winter Climate in Tempe, United States

Tempe experiences mild and mostly sunny winters from December to February. The average high temperature ranges from 64°F (18°C) in December to 68°F (20°C) in February, while the average low temperature remains between 40°F (4°C) and 45°F (7°C). Rain is infrequent during the winter months, with an average of only 1 to 2 inches of precipitation per month. Occasional cold fronts can bring brief periods of cooler temperatures and wind, but these typically pass quickly.

Summer Climate in Tempe, United States

Tempe’s summers are hot and dry, with average high temperatures reaching the mid-90s°F (30s°C) from June to September. The average low temperature during the summer months remains in the mid-70s°F (20s°C). Heatwaves are common during the summer, with temperatures exceeding 100°F (38°C) on occasion. Precipitation is rare during the summer, with an average of less than an inch of rainfall per month. However, monsoon storms can bring intense but brief periods of heavy rain and wind.

Tempe’s Climate

Tempe experiences a subtropical desert climate characterized by hot, dry summers and mild, dry winters. The average temperature in Tempe throughout the year is approximately 72 degrees Fahrenheit (22 degrees Celsius). The hottest months are typically June through September, with average temperatures reaching into the high 90s (mid-30s Celsius) or even exceeding 100 degrees Fahrenheit (38 degrees Celsius). During these months, it’s essential to stay hydrated and take precautions against heat-related illnesses.

Seasonal Temperatures

The winter months in Tempe are generally mild and pleasant, with average temperatures hovering around the mid-50s Fahrenheit (13 degrees Celsius) to the low 70s Fahrenheit (22 degrees Celsius). While there can be occasional cold snaps, temperatures rarely drop below freezing. This allows for a variety of outdoor activities year-round, including hiking, biking, and golfing. Spring and fall in Tempe bring moderate temperatures, with average highs in the 70s and 80s Fahrenheit (20s and mid-30s Celsius) and lows in the 50s and 60s Fahrenheit (10s and low 20s Celsius).

Types of Clouds in Tempe, United States

Tempe, Arizona, experiences a wide range of cloud formations throughout the year. During the summer months, convective clouds are common. These clouds are formed by rising air currents and can produce thunderstorms and rain showers. Cumulus clouds are the most common type of convective cloud, appearing as puffy, cotton-like formations. Stratus clouds are another type of convective cloud, appearing as a uniform gray layer that covers the sky.

In the winter months, stable clouds are more prevalent in Tempe. These clouds are formed when a layer of warm air rises above a layer of cold air. Stratus clouds are the most common type of stable cloud, appearing as a uniform gray layer that covers the sky. Nimbostratus clouds are another type of stable cloud, appearing as a dark gray layer that produces rain or snow. Cirrostratus clouds are a type of stable cloud that appears as a thin, wispy veil that covers the sky.

Cloud Cover in Tempe, United States

The amount of cloud cover in Tempe varies throughout the year. During the summer months, cloud cover is typically high, with an average of 60-70% of the sky covered by clouds. This is due to the frequent convective activity that occurs during this time of year. In the winter months, cloud cover is typically lower, with an average of 30-40% of the sky covered by clouds. This is due to the more stable atmospheric conditions that prevail during this time of year.

Annual Precipitation Patterns

Tempe, located in the Sonoran Desert, experiences relatively low annual precipitation. With an average of just 8.4 inches (213 mm) per year, the city falls within the semi-arid climate zone. Most of the precipitation in Tempe occurs during the summer monsoon season, which typically runs from July to September. During this time, thunderstorms can bring heavy downpours and flash flooding, although these events are localized and short-lived. The winter months are generally dry, with occasional periods of light rainfall.

Seasonal Variations

The distribution of precipitation in Tempe is highly seasonal. The warmest months, which are June through August, account for the majority of the annual precipitation, with average monthly rainfall exceeding 2.5 inches (63 mm). During these months, the city experiences the effects of the North American Monsoon. Tropical moisture from the Gulf of Mexico and the Pacific Ocean surges northward, creating unstable atmospheric conditions that lead to frequent thunderstorms. The cooler months, from December to February, are typically dry, with average monthly rainfall below 1 inch (25 mm). However, occasional storms can still bring some precipitation during this time of year.

Rainfall patterns in Tempe, United States

Tempe, Arizona, experiences a desert climate with hot, dry summers and mild winters. The city receives an average of 9 inches of rain per year, most of which falls during the monsoon season (July-September). During this time, heavy thunderstorms can produce flash floods and torrential rainfall. The wettest month is August, with an average of 2.5 inches of rain, while the driest month is June, with an average of 0.1 inches of rain.

Despite the low annual rainfall, Tempe can experience occasional heavy downpours. In 2017, the city received a record-breaking 5.1 inches of rain in just one day. Such extreme rainfall events can cause flooding, property damage, and disruption to transportation. To mitigate these risks, the city has implemented a comprehensive stormwater management system, including drainage channels, detention basins, and infiltration systems. These measures aim to control flooding, reduce erosion, and improve water quality.

Climate and Precipitation Patterns

Tempe, Arizona is located in a desert region characterized by hot, dry summers and mild winters. Snowfall in Tempe is extremely rare, occurring only a handful of times in the past century. The average annual snowfall for the city is a mere 0.1 inches.

Record-Breaking Snowfall Events

Despite its rarity, Tempe has experienced a few notable snowfall events. The most significant occurred on January 9–10, 1937, when 1.5 inches of snow fell, covering the city in a white blanket. This snowfall event caused widespread disruption, including school closures and impassable roads. Another major snowfall event occurred in January 1974, with 1.2 inches of snow accumulating. However, these events remain significant outliers, and snowfall in Tempe remains a highly infrequent occurrence.

Summer Sun in Tempe

Tempe, located in the Sonoran Desert of Arizona, experiences scorching summer temperatures due to its arid climate. The sun is relentless, with an average high temperature of 104°F (40°C) in July, the hottest month. The days are long and dry, with very little humidity, making the heat feel even more intense. Direct sunlight can cause severe sunburn within minutes, so it is crucial to take precautions such as wearing protective clothing, seeking shade, and staying hydrated. Outdoor activities should be scheduled for the early morning or late evening hours when the sun is less intense.

Winter Sun in Tempe

In contrast to the blazing summer sun, Tempe’s winters are mild and sunny. The average high temperature in January, the coldest month, hovers around 65°F (18°C). The sun remains a prominent feature during the winter months, providing ample opportunities for outdoor activities. The days are generally clear and pleasant, making it an ideal time to explore the city’s parks, trails, and outdoor attractions. Hiking, biking, and golfing are popular activities enjoyed by locals and visitors alike during the temperate winter weather. The sun’s warmth adds to the overall charm of the city, making it a desirable destination for those seeking a break from the cold and dreary weather of other regions.

Sunset

As the sun dips below the horizon in Tempe, Arizona, the sky transforms into a canvas of vibrant hues. The western sky bursts into flames of orange, red, and purple, casting an ethereal glow on the surrounding landscape. The clouds, once billowing white, take on a softer, more muted appearance, painted in shades of pink and gold. The air cools slightly, and a gentle breeze carries the scent of blooming flowers. As darkness descends, the first stars begin to twinkle in the twilight sky, promising a magical night ahead.

Moonrise

As the last traces of twilight fade away, the moon rises above the eastern horizon, a silvery orb casting its gentle glow upon the slumbering city. The full moon, in all its splendor, illuminates the night sky, casting long shadows across the streets and buildings. The moon’s soft light washes over the rooftops, revealing intricate details and architectural wonders that are often overlooked during the day. The air grows crisp and cool, and the sound of crickets chirping fills the night. Under the watchful eye of the moon, Tempe transforms into a surreal and enchanting realm, inviting its inhabitants to dream and wonder.

Humidity Levels in Tempe

Tempe, located in the Sonoran Desert, experiences low humidity levels throughout the year. The annual average relative humidity falls between 35% to 45%, with the driest months being April through June. During these arid periods, humidity can drop as low as 15% to 20%. In stark contrast, the monsoon season from July to September brings higher humidity, sometimes reaching 60% to 70% during peak rainfall events. However, once the storms pass, humidity levels quickly return to their normal low values.

Causes of Low Humidity

The main contributing factor to Tempe’s low humidity is the city’s desert environment. The Sonoran Desert is characterized by hot, dry air and receives minimal rainfall throughout the year. Additionally, Tempe’s proximity to the mountains further influences its humidity levels. Mountains act as a barrier, blocking the flow of moisture-laden air from reaching the city. As a result, Tempe’s humidity levels remain low even during periods of higher rainfall in neighboring regions.

Seasonal Wind Patterns

Tempe’s wind patterns are primarily influenced by its desert location and proximity to the Sonoran Desert. During the winter months (December to February), Tempe experiences weak and variable winds. These winds typically come from the west and northwest, bringing in cool and dry air from the nearby mountains.

In contrast, the summer months (June to August) bring stronger and more consistent winds. These winds are predominantly from the southwest, carrying warm and moist air from the Gulf of California. The monsoon season during July and August further intensifies the winds, bringing occasional thunderstorms and gusty downdrafts.

Local Wind Phenomena

Tempe also experiences a few notable local wind phenomena. The “Palo Verde Winds” are strong and dust-laden winds that occur in the spring and fall. These winds originate from the parched northern deserts and can cause significant visibility issues. Additionally, Tempe sits on the edge of the Phoenix metropolitan area, which creates a “heat island” effect. This effect leads to a pressure gradient between the city and the surrounding desert, resulting in a constant flow of air toward the city center, known as the “city breeze.”

Spring (March-May)

Tempe’s spring season is characterized by pleasant temperatures, vibrant greenery, and a host of outdoor activities. With average temperatures ranging from the mid-50s to mid-70s Fahrenheit, it’s an ideal time for exploring the city’s many parks and trails. The Arizona State University campus, home to beautiful gardens and the Desert Arboretum, comes alive with blooming flowers and lush vegetation. Spring also coincides with the annual Tempe Festival of the Arts, one of the largest outdoor art festivals in the country.

Fall (September-November)

Fall in Tempe offers a welcome respite from the summer heat with average temperatures falling to the mid-60s to low-70s Fahrenheit. The air becomes crisp and the skies clear, making it perfect for outdoor adventures. The Tempe Town Lake Loop Trail is a popular spot for walking, biking, and rollerblading. The city also hosts a variety of fall events, including the Tempe Oktoberfest and the ASU Homecoming Parade. The vibrant foliage of the area’s trees creates a picturesque backdrop for these festive occasions.

Solar Potential and Resources

Tempe enjoys an abundance of solar radiation due to its location in the sun-drenched Sonoran Desert. The city receives an average of 290 sunny days per year, with a solar radiation index of approximately 6.5 kWh/m²/day. This favorable solar potential makes Tempe an ideal candidate for harnessing solar energy and promoting its utilization.

Solar Installations and Initiatives

In recognition of its solar potential, Tempe has implemented numerous initiatives to encourage the adoption of solar energy. The city offers a Solarize Tempe program, which provides rebates and incentives to homeowners and businesses that install solar photovoltaic (PV) systems. Furthermore, Tempe has partnered with Arizona Public Service (APS) to create the Tempe Solar Partnership, a community-based solar project that allows residents to purchase solar energy from a shared solar array. These programs and initiatives have contributed to Tempe’s growing number of solar installations, with both residential and commercial properties participating in the city’s solar energy transition.

Landform Characteristics

Tempe, Arizona, situated within the Salt River Valley, is characterized by a relatively flat topography. The elevation of the city ranges from approximately 1,120 feet above sea level (ASL) along the Salt River to around 1,200 feet ASL in the north. The terrain primarily consists of broad alluvial plains created by the deposition of sediments from the Salt River and its tributaries. These plains are generally level and well-drained, providing suitable conditions for urban development.

Riverine Influence

The Salt River meanders through the eastern portion of Tempe, shaping the local topography. The river has carved a deep channel, with steep banks and a wide floodplain. The floodplain is characterized by a series of terraces, which formed during different periods of the river’s history. These terraces provide natural drainage and create diverse habitats for wildlife. The riverine environment also influences the city’s climate, resulting in cooler temperatures and higher humidity along the river corridor compared to the surrounding areas.

Phoenix Sky Harbor International Airport (PHX)

Phoenix Sky Harbor International Airport (PHX) is the closest major airport to Tempe, Arizona. It is located about 5 miles (8 kilometers) northeast of downtown Tempe and offers a wide range of domestic and international flights. PHX is a major hub for Southwest Airlines and American Airlines, providing convenient connections to various destinations across the United States and beyond. The airport has three terminals, with Terminal 4 being the newest and most modern. It features a variety of amenities, including restaurants, shops, and free Wi-Fi. PHX is accessible via the Valley Metro Rail light rail system, which provides direct service to downtown Tempe and other parts of the Phoenix metropolitan area.

Scottsdale Airport (SDL)

Scottsdale Airport (SDL) is a smaller, general aviation airport located about 10 miles (16 kilometers) northeast of downtown Tempe. It primarily serves private aircraft and charter flights but also offers some limited commercial flights to Los Angeles and San Diego. SDL is a popular choice for business travelers and those seeking a more exclusive airport experience. It features a private terminal with a lounge, conference rooms, and personalized concierge services. SDL is less crowded than PHX, providing a more relaxed and convenient travel experience. It is accessible via private transportation or taxi services.

History and Culture

Tempe, Arizona, located in the Phoenix metropolitan area, has a rich history dating back to the Hohokam Native American tribe. The city was established in the late 1800s and named after the Vale of Tempe in Greece. In the early 20th century, Tempe became home to Arizona State University, which has played a significant role in the city’s growth and development. Tempe is a vibrant cultural hub, boasting numerous museums, art galleries, and performance venues. The Mill Avenue District is a popular destination for dining, shopping, and entertainment.

Education and Innovation

Tempe is renowned for its educational excellence. Arizona State University, one of the largest public universities in the United States, is a major research institution with a focus on innovation and entrepreneurship. The city is also home to the Biodesign Institute, which conducts cutting-edge research in biomedical sciences. Tempe’s commitment to education and innovation has fostered a thriving technology industry, with numerous high-tech companies located in the city. The city is a hub for aerospace, electronics, and healthcare research and development. Tempe’s highly educated workforce and innovative culture provide a competitive advantage for businesses seeking a base in the region.