Embodiments are generally directed to sharing of environmental data for client device usage. An embodiment of a client device includes a processor; an environmental sensor to sense an environmental condition, an output of the sensor being a local environmental sensor value; and a wireless receiver to receive environmental data for a certain proximity area from a second client device according to an environmental data sharing protocol via a wireless network. The environmental data sharing protocol allows receipt of the environmental data without requiring pairing, bonding, or other relationship of client devices.