Residents of the Grand Valley can expect classic summer weather this Independence Day weekend. National Weather Service Grand Junction meteorologist Ben Moyer said on Friday that the holiday weekend will be seeing a continuation of the weekâs warm temperatures with highs in the upper 90s, potentially hitting triple digits Sunday. There is a chance of thunderstorms and showers in the mountains this weekend, Moyer said, but those will more likely affect those recreating in the mountains than those staying in the Grand Valley. The temperatures will stay warm into next week, rising back over 100 in the middle of the week, although Moyer said the valley will likely be spared the record-breaking temperatures of Juneâs heat wave,