1. 
2. 
[syn: seasonably, timely, well-timed, apropos]
The Collaborative International Dictionary of English v.0.48:
Seasonable \Sea"son*a*ble\, a.
   Occurring in good time, in due season, or in proper time for
   the purpose; suitable to the season; opportune; timely; as, a
   seasonable supply of rain.
   [1913 Webster]
         Mercy is seasonable in the time of affliction.
                                                  --Ecclus.
                                                  xxxv. 20.
   [1913 Webster] -- Sea"son*a*ble*ness, n. --
   Sea"son*a*bly, adv.
   [1913 Webster]
WordNet (r) 3.0 (2006):
seasonably
    adv 1: in accordance with the season; "it was seasonably cold"
           [ant: unseasonably]
    2: at an opportune time; "your letter arrived apropos" [syn:
       seasonably, timely, well-timed, apropos]