Bed having features for determining and modifying temperature of a sleep environment

A controller for determining a distal-proximal temperature-gradient of a sleeper, the controller comprising memory and one or more processors, the controller configured to:

• receive, from each of a plurality of sensors arranged in a single linear array arranged parallel to a head of a mattress, each sensor configured to sense surface temperature of the sleeper of a bed, temperature readings at a particular time;
• access, for each temperature reading, a corresponding weight-value;
• determine the distal-proximal temperature-gradient for the sleeper at the particular time using the temperature readings and the corresponding weight-values;
• and
• use the distal-proximal temperature-gradient to engage one or more peripheral controllers to adjust the sleep environment.

A computer-readable medium tangibly storing instructions for determining a distal-proximal temperature-gradient of a sleeper, the instructions configured to, when executed by one or more processors, cause the processors to perform operations comprising:

• receiving, from each of a plurality of sensors arranged in a single linear array arranged parallel to a foot of a mattress, each sensor configured to sense surface temperature of the sleeper of a bed, temperature readings at a particular time;
• accessing, for each temperature reading, a corresponding weight-value;
• determining the distal-proximal temperature-gradient for the sleeper at the particular time using the temperature readings and the corresponding weight-values;
• and
• using the distal-proximal temperature-gradient to annotate sleep-session information for the sleeper stored in a data store.