Historical weather data, all-time temperature records, and monthly climate averages for Millcreek, UT. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4 in Millcreek runs mild, with highs averaging 63° and lows around 43° across 28 years of records. There's still a small but real chance of winter's last gasp — snow has fallen on this date 8% of the time, and the thermometer once dipped to 31° as recently as 2011. On the flip side, it's hit 79° on this date before, so pack layers.
Millcreek spans the full extremes of a high-desert valley climate, from a blistering 102° in August 1994 to a brutal -6° on December 23, 1990 — a 108-degree swing between all-time records. Single-day snowfall has topped out at 16 inches (December 26, 2003), a reminder that the Wasatch foothills don't ease into winter gently.
Summer is the dominant season here, with highs hitting 90° in early July and staying in the upper 80s through August. Winters are cold but short on paper — January averages just 40° — though the valley can freeze hard when it wants to. If you're chasing rain, aim for mid-May, which is Millcreek's wettest stretch of the year.