بسم الله الرحمن الرحيم
(Fatwa: 1592/1324/B=10/1435)
You may perform umrah in any month other than Shawwal, Zul Qadah and Zil Hijjah. It is sunnah to perform it. You may go for umrah whenever you wish.
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband
