How to express the future perfect progressive tense?

Question

Here's an example sentence in English with this tense

On July 1st, it will have rained for 2 months

I understand that there's no such tense in Japanese, but how do I go about expressing it?
Here are some of my attempts

７月１日まで２ヶ月間で降ってくる

７月１日で２ヶ月間降ってくる

７月１日になると２ヶ月間降ってきた

Please let me know of the correct way of expressing this tense and if any of my examples made sense at all

Answer 1

None of your examples makes sense. 降ってきた would be understood as meaning it has begun to rain. 降ってくる sounds like something will come down.

I would say:

７月１日で２ヶ月間降った (or 降り続けた) ことになる。

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If you need to add the progressive aspect, the following would do:

７月１日で２ヶ月間降っている (or 降り続けている) ことになる。