Blumbergs was born September 6, 1943 in Rīga. He graduated from the Painting Department of the Latvian Academy of Art in 1972.
From 1969 to 1978 he worked as a scenographer at the Dailes Theater. He has worked in a number of other theaters both in Latvia and abroad.
He is a regular participant in exhibitions since 1962. In 1995 he was awarded the honorary Order of the Three Stars. In 2009 he was awarded a Lifetime Contribution award at the annual theater awards ceremony Spēlmaņu nakts (Night of the actors).
"I draw what I live to better understand how I live," Ilmārs Blumbergs told Latvian Radio in 2013, talking about his exhibition titled "I won't die".