Researchers with the UCLA Department of Architecture and Urban Design have released an updated version of Climate Consultant. This free, easy-to-use, graphic-based computer program displays climate data in dozens of ways useful to architects, builders, contractors, and homeowners, including temperatures, humidity, wind velocity, sky cover, and solar radiation in both 2-D and 3-D graphics for every hour of the year in either Metric or Imperial units. Climate Consultant 4.0 also plots sun dials and sun shading charts overlaid with the hours when solar heating is needed or when shading is required. The psychrometric chart analysis shows the most appropriate passive design strategies in each climate, while the new wind wheel integrates wind velocity and direction data with concurrent temperatures and humidities and can be animated hourly, daily, or monthly. Climate Consultant 4.0 reads climate data in the EPW format that the Department of Energy makes available at no cost (in fact there are more than 1300 stations from around the world available in this format).