Twin Cities Long Heat Waves On/Before June 15th Are Not Common
This stretch of early-season heat will go down in the record book for more than just the record highs that have been set. The Minnesota State Climatology Department complied some early-season (occurring on or before June 15th) heat stats, and only found five times in Twin Cities history where there have been at least five consecutive days with a high of 90F or greater. The most on record are six in a row, set three times – most recently between May 24-29, 2018, which included the earliest 100F on record on Memorial Day 2018. If highs do remain at or above 90F through at least Thursday as the current forecast shows, we would have the longest stretch on record on or before June 15th.
As we look at the longest 90F+ stretches on record (not limited to any date range) we are going to be nowhere near the 14 consecutive days observed back in July of 1936. However, we do look to get seven days in a row (last Friday through this Thursday), which would tie for the 15th longest stretch on record with seven days. If we can get a 90F+ high on Friday as well, this would tie for the ninth-longest overall stretch on record.
That forecast through Thursday would also put us tied for sixth place in most 90F+ degree highs that have occurred on or before June 15th at seven. Friday could make it fourth place if we can get up to 90F. Stats: Minnesota State Climatology Department