Possible Clues:

• Wintry spell
• Period of unusually low temperature
• Short spell of severe frost
• Sudden drop-off
• Having illness, take a break in winter period
• Brief spell of freezing weather
• sudden brief spell of icy weather
• Being a century old, the god's back to being frosty
• Cause of winter ailments - needing little sleep
• Period of icy weather