The most common causes of misshapen melons are poor pollination and/or dry soil or high temperatures. Either one of those extreme weather conditions could have affected your fruit. And the weather could have influenced pollination: it can be (and has been) too hot to achieve effective pollination. In future, try row covers to help to shelter the plant from extreme heat without sacrificing sunlight. The cover also helps to retain moisture—but note that the cover is not a replacement for mulch.
The most common causes of misshapen melons are poor pollination and/or dry soil or high temperatures. Either one of those extreme weather conditions could have affected your fruit. And the weather could have influenced pollination: it can be (and has been) too hot to achieve effective pollination. In future, try row covers to help to shelter the plant from extreme heat without sacrificing sunlight. The cover also helps to retain moisture—but note that the cover is not a replacement for mulch.
We hope this helps.