Tempe, Arizona, experiences a hot desert climate characterized by scorching summers and mild winters. The city’s climate is classified as BWh under the Köppen Climate Classification system, indicating a hot desert climate. Average high temperatures in July reach around 106°F (41°C), while January sees average lows of approximately 42.7°F (5.9°C). Annual precipitation is limited, averaging about 8.84 inches (224.54 mm), with the majority occurring during the monsoon season from July to September.
City Initiatives for Sustainability
In response to its arid climate and environmental challenges, Tempe has implemented several initiatives aimed at promoting sustainability and resilience:
Energy Transition Goals
The City of Tempe has set ambitious targets to transition toward clean, renewable energy. The goals include achieving 100% renewable energy for municipal operations by 2035 and attaining carbon neutrality in both community and municipal operations by 2050.
Green Stormwater Infrastructure
Through the Rain to Roots Initiative, Tempe promotes Green Stormwater Infrastructure (GSI) to manage stormwater effectively. GSI utilizes vegetation and permeable surfaces to capture and absorb stormwater, reducing runoff and providing water for on-site vegetation.
Tree Canopy Restoration
Following severe storms in Fall 2025 that resulted in the loss of over 500 trees, Tempe partnered with the Salt River Project (SRP) to restore the city’s tree canopy. The Right Tree, Right Place program focuses on planting appropriate tree species to enhance power reliability and safety.
Water Quality and Conservation
Tempe sources its potable water from surface water treatment plants and groundwater wells. The city emphasizes water conservation and quality through various programs, including the Pretreatment & Pollution Prevention initiative, which aims to reduce pollutants entering the municipal sewer system.
Understanding Tempe’s climate and the city’s proactive environmental initiatives is essential for residents and visitors alike. These efforts contribute to a more sustainable and resilient community, addressing the challenges posed by the region’s unique climate conditions.