Since June 29th, the high temperature in the Twin Cities has been at 90 degrees or above. Combined with high dew point values, the heat index has reached in excess of 100 degrees for several periods during the heat wave. New high temperature records were set on July 2 and July 4, as the mercury climbed to 99 and 101, respectively. The daily high temperature reached 100 degrees or more for the 34th time since 1873 over the Fourth of July.
| Date | High Temp | Record Temp | Year |
| 6/29/12 | 90 | 102 | 1931 |
| 6/30/12 | 92 | 100 | 1931 |
| 7/1/12 | 94 | 100 | 1883 |
| 7/2/12 | 99* | 96 | 1911 |
| 7/3/12 | 97 | 100 | 1949 1990 |
| 7/4/12 | 101* | 100 | 1949 |
| 7/5/12 | 96 | 100 | 1982 |
* = Indicates new record
July 4th also marked the first time since 1995 an hourly observation at MSP Airport recorded a temperature of 100 degrees or more with a dew point of 70 or greater. That statistic was impressive to me. We do not often hit 100 degrees here, and to do with tropical humidity like this is quite an accomplishment. A heat index of 109 was observed from my home in Shakopee at 7:15 pm Thursday.
RS
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