Westminster, Colorado, experiences a diverse climate characterized by hot summers and cold, snowy winters. Throughout the year, temperatures typically range from 23°F to 88°F, with extremes rarely dipping below 7°F or exceeding 96°F. The warm season spans approximately 3.2 months, from early June to mid-September, with July being the hottest month, averaging a high of 88°F and a low of 62°F. Conversely, the cold season lasts about 3.5 months, from late November to early March, with January being the coldest month, averaging a high of 46°F and a low of 19°F.
Precipitation in Westminster is relatively moderate, with an annual average of 15.94 inches. May is typically the wettest month, receiving about 2.66 inches of rainfall, while January and December are the driest, each averaging 0.47 inches. Snowfall is common from October through May, with April often recording the highest snowfall, averaging 5.55 inches.
In response to these climatic conditions, the City of Westminster has implemented several environmental sustainability initiatives. Notably, the Walnut Creek Golf Preserve is certified as an “Audubon International Signature Sanctuary,” emphasizing wildlife conservation, habitat restoration, water quality, environmental education, and resource management.
Additionally, the city offers programs to support homeowners’ associations (HOAs) in adopting water-efficient landscaping practices. These include irrigation audits and turf conversion programs, which aim to reduce water usage and promote native plantings.
Westminster also encourages the adoption of solar energy. As of 2025, over 5,000 residential and commercial buildings have installed solar panels, collectively producing more than 20 megawatts of electricity annually. This effort aligns with the city’s commitment to achieving 100% renewable electricity community-wide by 2040.
Through these initiatives, Westminster demonstrates a proactive approach to environmental stewardship, aiming to balance urban development with the preservation of its natural resources.