"Summer Rain" achieved moderate commercial success in North America, where it was released as the second single from
Runaway Horses (1989). In January 1990, the song entered the
Billboard Hot 100, the main US chart, at number 86. Within seven weeks of its release, it peaked at number 30 and stayed at that position for two weeks. The single spent 13 weeks on the
Billboard Hot 100, six of which were in the top 50. The single was Carlisle's second to last song to chart on the
Billboard Hot 100. It also peaked at number 29 on the US
Billboard Adult Contemporary chart, where it spent eight weeks on the chart. In Australia, the song had the most commercial success, where it was released as the album's third single on March 19, 1990. In early April 1990, it debuted at number 42. Within two months of its release, it reached the top 10, where it stayed for five weeks. The song reached a peak at number six on May 20 and remained there for two more weeks, spending a total of 16 weeks in the top 50. It became the 40th highest-selling single in Australia for 1990. The song was released in the United Kingdom in December 1990 as the sixth and final release from
Runaway Horses, peaking at number 23 at the end of January 1991 and spending 10 weeks in the chart. ==Music video==