Climate Data Sources

Local, Regional, and U.S. Climate Information

Climate Data Online, National Climatic Data Center, 1890-
Monthly editions contain station daily maximum and minimum temperatures and precipitation. Some stations provide daily snowfall, snow depth, evaporation, and soil temperature data. Each issue also contains monthly summaries for heating and cooling degree days (65 degrees Fbase). The July issue also contains monthly heating degree days and snow data for the preceding July through June. The annual issue contains monthly and annual averages of temperature, precipitation, temperature extremes, freeze data, soil temperatures, evaporation, and a recap of monthly cooling degree days.

Daily Weather Maps, National Oceanic and Atmospheric Administration.
Maps contain 500-Millibar Height Contours chart, the Highest and Lowest Temperatures chart, and the Precipitation Areas and Amounts chart. For each day, simple charts are arranged on a single page. These charts are the surface analysis of pressure and fronts, color shading, in ten degree intervals,of maximum and minimum temperature, 500-Millibar height contours, and color shaded 24-hour total precipitation. Pre-2004 maps can be found on-line through the NOAA Central Library U.S. Daily Weather Maps Project or in hard copy in The Schwerdtfeger Library.

Hourly Precipitation Data, National Climatic Data Center, 1951-
Contains hourly precipitation amounts obtained from recording rain gages located at National Weather Service, Federal Aviation Administration, and cooperative observer stations. Published data are displayed in inches to tenths or inches to hundredths at local standard time. HPD includes maximum precipitation for nine (9) time periods from 15 minutes to 24 hours, for selected stations.

Local Climatological Data (City), National Climatic Data Center, 1996-
Summarizes temperature, relative humidity, precipitation, cloudiness, wind speed and direction observations for several hundred cities in the U.S. and its territories. Check the Library Catalog for older issues in print.

Madison Climate Data, collected at North Hall on UW-Madison campus before the official site was moved to Truax Field. (text file)
Headers for the columns are missing, but they should be (in this order): (year) (month) (day) (liquid precipitation) (low) (high) (snowfall) (snowdepth).

Madison Climate Data, from the NWS station at Truax Field, 1943-2015 (text file)
Headers for the columns are missing, but they should be (in this order): (year) (month) (day) (liquid precipitation) (low) (high) (snowfall) (snowdepth).

Storm Data, National Climatic Data Center, NOAA, 1959-
Monthly issues contain a chronological listing, by states, of storm occurrences and unusual weather phenomena. Reports contain information on storm paths, deaths, injuries, and property damage. An "Outstanding storms of the month" section highlights severe weather events with photographs, illustrations, and narratives.

U.S. Climate Reference Network (USCRN), National Climatic Data Center, NOAA
A network of climate stations developed by the National Oceanic and Atmospheric Administration (NOAA). The USCRN's primary goal is to provide future long-term homogeneous temperature and precipitation observations that can be coupled to long-term historical observations for the detection and attribution of present and future climate change.