Skywatch Observatory
Pyranometer: 676 W/m² Pyrgeometer: 281 W/m² Pyra Diffuse: 224 W/m² Daily Precip: 0 mm Rain Intensity: 0.0 mm/hr Snow Depth: 10 mm Ozone: 25 ppb Cloud Base: No Cloud Base Detected 16:37 Mar-28-2026 UTC

Skywatch Observatory

Skywatch is a rooftop atmospheric monitoring station on the Duane Physics Building at the University of Colorado Boulder, operated by the Department of Atmospheric and Oceanic Sciences (ATOC). The station provides real-time and archived measurements of solar radiation, ozone, precipitation, cloud height, and other atmospheric variables.

East platform instruments including the pyranometer and pyrgeometer.
East Platform Instrumentation
West platform instruments including the rain gauge and disdrometer.
West Platform Instrumentation
Kipp and Zonen CMP 3 pyranometer on the observatory platform.
Kipp & Zonen CMP 3 Pyranometer

News

July 18, 2017
SPN1 added to the Skywatch instrument suite. The instrument provides total (global) and diffuse irradiances.
April 10, 2014
The Thermo Environmental UV Photometric Ozone Monitor is running again after replacing the lamp. We were lucky to find a replacement bulb at Jelight Company in Irvine, California.

Instrumentation

The observatory houses nine instruments that continuously measure atmospheric conditions. Select an instrument from the sidebar or the navigation menu to view today's data.