Climate

The average mean temperature in January ranges from 53-59 degrees F; summers are a little warmer with an average mean temperature in July that ranges from 62-70 degrees F. Humidity reaches on average 60% during the afternoon to 100% during nightfall and early morning. On average, 95% of the rainfall in the Channel Islands occurs between November and April. January and February are the rainiest months (45% of average totals).

Annual rainfall is about 14” per year but depending upon the topographical features of a particular location, rainfall on the islands might range from less than 10 inches to more than 20 inches annually. Fog is a common weather feature, especially at San Miguel and Santa Rosa Islands. Fog is most common in spring and summer.