It looks like "June" might be a typo or slang that you meant to use. If you're referring to the month of June, it's actually a time that many people look forward to, especially for the start of summer in the Northern Hemisphere. If you're using "dum" to mean "dumb" or likening June to something negative, I would need more context to understand your perspective.
If you're referring to something else or a specific event that happened in June that you found unappealing, please share more details!