There are a lot of great weather and climate based resources out there. This page has links to a few, some are weather forecast and historical data, others are GIS resources, and some are just cool ways of representing weather patterns.
There are several climate change related resources on this page as well.
Automated Statistical Downscaling (ASD)
Graphical user interface for the statistical downscaling of GCM outputs to regional or local variables
An excellent new weather tool that interpolates weather data down to 9×9 km blocks. The data is downloadable and the interface is smooth and pleasant. As of this entry, the data is only available for portions of Africa and for India.
Climate change information, maps, data, and tools for California
Climate at a Glance, NOAA
Allows you to generate temperature, precipitation, heating, cooling, drought, etc charts for global, US, state, and sub-state geographic areas.
Climate Change eXplorer
An online climate change visualization tool that allows you to track a number of variables and statistics over time. Good graphical presentation and options for saving your data.
Climate Change:New Scientist
A very coarse global climate map showing 20 year temperature differences from the 1951-1980 average temp. Dates begin in 1894. Clicking on a location gives a local chart for the time period selected.
Maps and historic climate data
US and Global temperature and precipitation predictions using various models in an easy to access interface
Community Earth System Model
“A fully-coupled, global climate model that provides state-of-the-art computer simulations of the Earth’s past, present, and future climate states.” – requires free registration to download source code
Educational Global Climate Modelling
Older software packages that allow you to run your own global climate models with numerical and visual results. – requires license purchase
Mean values of various climate perameters for select regions of the globe
Realtime wind patterns for the globe.
Hong Kong Observatory
An detailed resource for current weather in Asia
National Atlas (USA)
Various US national statistics, including a good selection of climate data
National Climate Data Center (NOAA)
A collection of software packages and data available via NOAA
National Phenology Network (USA)
A crowd-sourced/citizen science based mapping project tracking phenology across the US
National Snow and Ice Data Center
Extremely complete collection of snow and ice info, maps, historical weather data, and GIS data from a wide variety of sources
Planetary Weather Research and Forecasting model (planetWRF)
Open source numerical planetary weather model. Designed to work on platforms with a wide range of computing power. Used for weather models on and off Earth.
“Climate science from climate scientists” – an array of climate articles written by climate scientists. The “start here” page has an excellent selection of links for people with a wide range of familiarity with climate science.
Regional and Mesoscale Meterology Branch (RAMMB)
Detailed weather products from NOAA & Colorado State, located in the Cooperative Institute for Research in the Atmosphere (CIRA)
Statistical Downscaling Model (SDSM)
Decision support tool for assessing local climate change impacts via statistical downscaling models – requires registration
United States Drought Monitor
Maps showing current drought severity across the US
Really great current, historical, and predicted weather information in a beautiful and intuitive presentation.
Extremely cool art project showing wind movement across the US
World Meteorological Organization
A UN organization focuses on meteorology, water, and environmental concerns. Excellent index of books, many of which can be downloaded free (the price in the basket is for physical texts), great source of information, including for disaster prediction and relief.
Global climate data including predictions (GIS layers)