A solar-powered weather station installed in 1990 near reserve headquarters records precipitation, air temperature, solar radiation, and Eel River water temperature and level. Three additional weather stations were added beginning in 2007 as part of the Keck Hydrowatch Center. A list of current weather stations at Angelo can be found here, and current measurements are available at the Berkeley Sensor Database.

Earlier accounts of daily temperatures and precipitation date back to 1942, when Heath Angelo began keeping weather records from near the mouth of Elder Creek.