Premium BoulderCAST Daily – Wed 05/13/26 | Thickening afternoon clouds could spoil Boulder’s bid for earliest 90° day on record

May 13, 2026 / Ben Castellani

The big mid‑level ridge driving this week’s warmth will park itself directly over the Front Range through the first half of our Wednesday, giving us full sun and a rapid climb toward 90°. If Boulder hits that 90° reading, this will become our earliest 90° reading on record, narrowly beating May 15, 1978 for the honor. The atmosphere is primed …

Ben Castellani

Ben grew up in southwestern Pennsylvania and holds both a bachelor's and a master's degree in Meteorology, the latter being from CU Boulder. His hometown received nearly three feet of snow from the Storm of the Century back in March of 1993, sparking his initial interest in impactful weather. Ben currently works on remote sensing and data analysis software at NV5 Geospatial Software in Boulder.

BoulderCAST Daily, Premium Content