Records set in July 2009 (Period of Record 1970-2009) Monthly Top 10 - 7th Highest Daily Maximum Temperature of 106° on the 13th (tied). - 5th Highest Daily Minimum Temperature of 80° on the 14th and 15th (tied). - 9th Highest Daily Minimum Temperature of 79° on the 13th (tied). - 5th Highest Daily Mean Temperature of 92° on the 13th (tied). - Most Monthly Heating Degree Days with 1. Tied with 1970. Daily Record High Maximum Temperature - 103° on the 11th (tied). - 105° on the 12th (tied). - 106° on the 13th. - 104° on the 15th (tied). Record Low Maximum Temperature - 76° on the 27th. Record High Minimum Temperature - 78° on the 10th. - 78° on the 12th (tied). - 79° on the 13th. - 80° on the 14th. - 80° on the 15th. Record High Mean Temperature - 91° on the 10th. - 90° on the 11th (tied). - 91° on the 12th (tied). - 92° on the 13th. - 91° on the 14th. - 91° on the 15th.