- Weather Underground.
- National Weather Service
- JPL Station on Mount Wilson
- Richard Bell’s weather station at the roll off telescope shed on the mountain (accurate humidity info)
- GOES West Satellite Loop
Another great source of weather information specifically for astronomers on Mount Wilson is Clear Dark Skies. Learn how to read their chart below on their website.

Additional Current Weather and Road-related Information:
The following sites provide weather forecast and condition information and the status of county and state roads that provide access to Mount Wilson Observatory:
- Current Conditions (Frequently Updated) from CHARA Weather Stations
- MWO National Weather Service Brief Forecast
- MWO National Weather Service Detailed Forecast
- National Weather Service Los Angeles County Mountains Forecast
- MWO Clear Sky Chart
- CALTRANS Angeles Crest Hwy Status
- Los Angeles County Roads Status
- Angeles National Forest Alerts and Notices

