In the day the drought consumed me, and the frost by night - The being exposed to the heat by day, and frost by night, is made part of the heaviest punishment of Promethus by Aeschylus.
Σταθευτος δ' ἡλιου φοιβῃ φλογι, Χροιας αμευψεις· ασμενῳ δε σοι
Ἡ ποικιλεμων νυξ αποκρυψει φαος·
Παχνην θ' ἑῳαν ἡλιος σκεδᾳ παλιν.
Aeschyl. Prom. Vinc., v. 22.
Opposed to the sun's most fervid beam, The hue of beauty changed; till parch'd by heat The night with spangled stole shall hide its light From thee rejoicing, but again the sun Chases the hoar frost from thy harass'd form - J. B. B. C.

Thus I was,.... In such a situation, as well as in the following uncomfortable plight and condition:
in the day the drought consumed me, and the frost by night: the violent heat in the daytime scorched him, and the severe frosts in the night pinched him: that is, in the different seasons of the year, the heat of the day in the summertime, and the cold of the night in the wintertime; for it cannot well be thought that there should be excessive heat in the day and sharp frosts in the night, in the same season of the year: it looks as if Laban did not allow Jacob the proper conveniencies of clothes, and of tents to secure him from the inclemency of the weather, which other shepherds usually had:
and my sleep departed from mine eyes; through diligent care and watchfulness of the flocks in the night season, which on some occasions were necessary; see Luke 2:8.

in the day the drought . . . and the frost by night--The temperature changes often in twenty-four hours from the greatest extremes of heat and cold, most trying to the shepherd who has to keep watch by his flocks. Much allowance must be made for Jacob. Great and long-continued provocations ruffle the mildest and most disciplined tempers. It is difficult to "be angry and sin not" [Ephesians 4:26]. But these two relatives, after having given utterance to their pent-up feelings, came at length to a mutual understanding, or rather, God influenced Laban to make reconciliation with his injured nephew (Proverbs 16:7).

"I have been; by day (i.e., I have been in this condition, that by day) heat has consumed (prostrated) me, and cold by night" - for it is well known, that in the East the cold by night corresponds to the heat by day; the hotter the day the colder the night, as a rule.