1. Not in accordance with the season
   "it was unseasonably cold"

See also: unseasonable

Antonym: seasonably

• Cooper Union
• Cooper Union for the Advancement of Science and Art
• Cooper's hawk
• cooperage
• cooperate
• cooperation
• cooperative
• cooperatively
• cooperativeness
• cooperator
• Cooperstown
• coordinate
• coordinate axis
• coordinate bond
• coordinate clause
• coordinate geometry
• coordinate system
• coordinated
• coordinated universal time
• coordinately
• coordinating
• coordinating conjunction
• coordination
• coordination compound
• coordinative