The weather data displayed on this page is measured by an off-the-shelf commercial weather station at our office. We are located about 4mi SE of Sullivan, WI in southeast Jefferson County.
This weather station has the unique feature of being able to create an image of the observation data and then send it to our web server. That is what you see above. This weather station lacks some of the calibration requirements consistent with official NWS equipment and thus it's accuracy is not guaranteed.

The data is updated on the server every 5 minutes, but this page, if left displayed in the browser, will update automatically every 2 minutes.