Also bear in mind that not every spot in the states on the top 10 list has vacation-quality weather. 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. UV Index Information Answers to common questions about the UV Index and UV radiation. While these lists are just of large US cities, any places nearby that have similar geography likely share their good weather. United States Wind Map. A Guide to the UV Index Brochure developed by EPA for meteorologists, educators and public health officials on recommendations for reporting the UV Index. 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). Warnings By State Excessive Rainfall and Winter Weather Forecasts River Flooding Latest Warnings Thunderstorm/Tornado Outlook Hurricanes Fire Weather Outlooks UV Alerts Drought Space Weather NOAA Weather Radio NWS CAP Feeds . Regional Snowfall Index NCEI produces the Regional Snowfall Index (RSI) for significant snowstorms that impact the eastern two thirds of the United States. Largest cities by population: All cities above 10,000 population: PAST WEATHER Climate Monitoring Past Weather Monthly Temps Records Astronomical Data Certified Weather Data For the entire United States, excluding Hawaii and Alaska, the season averages just above freezing at 33.2 °F (0.7 °C). 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. Search for Today's UV Index Search for today's UV Index by zip code or by city and state. The 40 major cities that were evaluated for the best weather rankings are all cities in the United States with over 440,000 people on July 1, 2006, according to the US Census Bureau's estimates. Global Climate at a Glance Enter your ZIP Code or location to see how today’s weather forecast and upcoming conditions could potentially affect your pain level. State-Wide Averages; Seasonal and annual weather averages plus rankings for each state. The examples give you a starting point, but by no means cover all the places in the state that get great weather year round. 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. United States Weather Map. Weather Index For Boydton, VA. Search. Weather & Arthritis Index. Each state on the list has examples of places with wonderful weather all year. The temperatures are based on data collected by weather stations throughout each state during the years 1971 to 2000 and made available by the NOAA National Climatic Data Center of the United States. Weather forecasts for cities in United States. The U.S. The Weather Channel and weather.com provide a national and local weather forecast for cities, as well as weather radar, report and hurricane coverage 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. Recent USA Weather; Temperatures, snowfall and precipitation for each year since 2010 at American cities. Excluding Hawaii and Alaska, the season averages just above freezing at 33.2 °F 0.7. Have similar geography likely share their good weather, the season averages just above freezing at °F! At 33.2 °F ( 0.7 °C ) rankings for each year since at. 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