| Barnes' Notes on the Bible The summer - Rather, the fruit-gathering, which follows the grain-harvest. The grain has failed; the fruit-gathering has also proved unproductive; so despair seized the people when they saw opportunities for their deliverance again and again pass by, until God seemed utterly to have forgotten them.
Clarke's Commentary on the BibleThe harvest is past - The siege of Jerusalem lasted two years; for Nebuchadnezzar came against it in the ninth year of Zedekiah, and the city was taken in the eleventh; see 2 Kings 25:1-3. This seems to have been a proverb: "We expected deliverance the first year - none came. We hoped for it the second year - we are disappointed; we are not saved - no deliverance is come."
Gill's Exposition of the Entire BibleThe harvest is past,.... Which was in the month of Ijar, as Jarchi observes, and answers to part of April and May: the summer is ended; which was in the month Tammuz, and answers to part of June and July: and we are not saved; delivered from the siege of the Chaldeans; and harvest and summer being over, there were no hopes of the Egyptians coming to their relief; seeing winter was approaching; and it may be observed, that it was in the month of Ab, which answers to part of July and August, that the city and temple were burnt. These are the words of the people of the Jews, despairing of help and salvation. So the Targum, "the congregation of Israel said, the time is passed, the end is up, and we are not redeemed.''
Geneva Study BibleThe {p} harvest is past, the summer is ended, and we are not saved. (p) The people wonder that they have for so long a time looked for comfort in vain.
Jamieson-Fausset-Brown Bible Commentary20. Proverbial. Meaning: One season of hope after another has passed, but the looked-for deliverance never came, and now all hope is gone.
Matthew Henry's Concise Commentary8:14-22 At length they begin to see the hand of God lifted up. And when God appears against us, every thing that is against us appears formidable. As salvation only can be found in the Lord, so the present moment should be seized. Is there no medicine proper for a sick and dying kingdom? Is there no skilful, faithful hand to apply the medicine? Yes, God is able to help and to heal them. If sinners die of their wounds, their blood is upon their own heads. The blood of Christ is balm in Gilead, his Spirit is the Physician there, all-sufficient; so that the people may be healed, but will not. Thus men die unpardoned and unchanged, for they will not come to Christ to be saved. | 
