Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Over the course of the year, the temperature typically varies from 40°F to 90°F and is rarely below 31°F or above 101°F . Find the most current and reliable 14 day weather forecasts, storm alerts, reports and information for Brentwood, CA, US with The Weather Network. The change in length of daylight between today and tomorrow is also listed when available. The horizon is well defined and the outline of objects might be visible without artificial light. The sun does not contribute to the illumination of the sky before this time in the morning, or after this time in the evening. The horizon is well defined and the outline of objects might be visible without artificial light. Please select the information that is incorrect.We recognize our responsibility to use data and technology for good. Interactive weather map allows you to pan and zoom to get unmatched weather details in your local neighbourhood or half a world away from The Weather Channel and Weather.com Weather Underground provides local & long-range weather forecasts, weatherreports, maps & tropical weather conditions for the Brentwood area. Ordinary outdoor activities are not possible at this time without extra illumination.The time period when the sun is between 12 and 18 degrees below the horizon at either sunrise or sunset. Please select the information that is incorrect.We recognize our responsibility to use data and technology for good. Track storms, and stay in-the-know and prepared for what's coming. Ordinary outdoor activities are not possible at this time without extra illumination.The time period when the sun is between 12 and 18 degrees below the horizon at either sunrise or sunset. One still should be able to carry on ordinary outdoor activities.The time period when the sun is between 6 and 12 degrees below the horizon at either sunrise or sunset.