Climate Extremes Index (CEI) was developed to quantify observed changes in climate within the contiguous United States. The RSI ranks snowstorm impacts on a scale from 1 to 5, similar to the Fujita scale for tornadoes or the Saffir-Simpson scale for hurricanes. The Clearing Index is defined as the Mixing Depth (depth of the mixed layer in 100s of feet above ground level) multiplied by the Transport Wind (average wind in the mixed layer in knots). A Guide to the UV Index Brochure developed by EPA for meteorologists, educators and public health officials on recommendations for reporting the UV Index. Global Climate at a Glance The U.S. United States Weather Map. Time series graphs and data files of the CEI (from 1910 to the present) are available for the following periods: Annual, Spring, Summer, Autumn, Winter, Cold Season, Warm Season and Hurricane Season. The examples give you a starting point, but by no means cover all the places in the state that get great weather year round. PAST WEATHER Climate Monitoring Past Weather Monthly Temps Records Astronomical Data Certified Weather Data Each state on the list has examples of places with wonderful weather all year. Largest cities by population: All cities above 10,000 population: State-Wide Averages; Seasonal and annual weather averages plus rankings for each state. For the entire United States, excluding Hawaii and Alaska, the season averages just above freezing at 33.2 °F (0.7 °C). While these lists are just of large US cities, any places nearby that have similar geography likely share their good weather. Weather & Arthritis Index. Also bear in mind that not every spot in the states on the top 10 list has vacation-quality weather. Search for Today's UV Index Search for today's UV Index by zip code or by city and state. Weather Index For Boydton, VA. Search. The Clearing Index is an Air Quality/Smoke Dispersal Index used to regulate open burning and as input for other air quality decisions throughout Utah. Enter your ZIP Code or location to see how todayâs weather forecast and upcoming conditions could potentially affect your pain level. UV Index Information Answers to common questions about the UV Index and UV radiation. The Weather Channel and weather.com provide a national and local weather forecast for cities, as well as weather radar, report and hurricane coverage Vacation Spots With Warm Winter Weather; Weather data for the warmest cities, beaches and parks to help you plan a winter vacation in the United States. Weather forecasts for cities in United States. Regional Snowfall Index NCEI produces the Regional Snowfall Index (RSI) for significant snowstorms that impact the eastern two thirds of the United States. Recent USA Weather; Temperatures, snowfall and precipitation for each year since 2010 at American cities. 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