SEASONABLY
seasonably, timely, well-timed, apropos
(adverb) at an opportune time; “your letter arrived apropos”
seasonably
(adverb) in accordance with the season; “it was seasonably cold”
Source: WordNet® 3.1
Etymology
Adverb
seasonably (comparative more seasonably, superlative most seasonably)
In due season; at an opportune or fitting time.
Varying with the season.
In a manner appropriate to the season.
(chiefly, law) Within the appropriate time period during which an action will be legally effective, as prescribed in legislation, a contract, or otherwise.
Source: Wiktionary
SEASONABLE
Sea"son*a*ble, a.
Definition: 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.
Mercy is seasonable in the time of affliction. Ecclus. xxxv. 20.
– Sea"son*a*ble*ness, n.
– Sea"son*a*bly, adv.
Source: Webster’s Unabridged Dictionary 1913 Edition