The temperature in downtown Sacramento officially reached 90 degrees on Wednesday afternoon. This is the first time the city has reached that mark this year. Here are a few stats centered on that 90-degree benchmark. On average, the first 90-degree day occurs between the last week of April and the first week of May. Between 1911 and 2020 (the current 30-year average period used by the National Weather Service), the average first date for a 90-degree high temperature is May 4. Last year, the first 90-degree day for downtown Sacramento came on April 7. The earliest occurrence of 90 degrees on record for the city is March 26, 1988.