You can add weather underground forcasts. This is like adding a picture. Visit Weather Underground at www.weatherunderground.com. Type in your zip code at the top. Scroll to the bottom of the page with the local weather, which will open after you type in your zip code and press enter. Click on Get Weather Stickers. Right click the sticker you want, and choose properties. Highlight the address of the sticker. Add that image to your website as you normally do. It will uipdate automatically each time the page loads.
 The NASA image of the day is available through gadgets on Google Sites
NASA Pictures are also available here IF YOU CAN ADD JAVASCRIPT to your site:
For the Header: <SCRIPT TYPE="text/javascript" src = "http://www.jacobtanenbaum.com/websites/sitestuff/pic.js">
For the Body:
<SCRIPT TYPE="text/javascript"> doPic("small"); </SCRIPT> |