Amanda Conk Best House · Photo: Tsayrate · CC BY-SA 3.0Dry weather: only 21 inches of rain and melted snow a year in Millcreek, less than in 89% of U.S. towns
Midsummer highs settle at about 91°. Its July heat outdoes that of 83% of U.S. towns. Compared with 1901–2000, the average now sits 1.9° higher. If you like long walks, May, June and September offer highs of 71–82°.
A year in Millcreek at a glance
Each month’s typical high and low, and what it brings.
What stands out about Millcreek’s climate
Compared with towns across the U.S., with Millcreek’s place in Utah beside it.
What a year in Millcreek feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 174 frost-free days a year
In half of years the last 32° night comes by April 29 and the first by October 22. Frost and day counts come from NOAA’s station at Cottonwood Weir, UT, 5 miles from the city’s center point, 450 ft higher.
The 2023 USDA map puts Millcreek’s center in zone 7b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 6°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 56 inches of snow a winter
Snow, measured at Holladay 0.5 Ese, UT, falls mostly in January and December. Precipitation (rain plus melted snow) adds up to 21 inches a year; April is the wettest month and July the driest. Rain or snow falls on about 97 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Millcreek
82% of the work is heating. Months averaging under 55° run from October through April.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Cottonwood Weir, UT.
Living with Millcreek’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
174 frost-free days in zone 7b. The last frost comes by Apr 29 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 22.
Months with highs of 62–84° and lows of 40° or more: May, June and September. 13 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Millcreek from natural hazards, earthquakes are the largest share (87%); heat waves, cold waves, winter storms and ice storms together are 1%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Millcreek and its neighbors
South Salt Lake the hottest July afternoons (92°, 1° warmer). Differences under a degree are within what the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Millcreek’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Millcreek, UT | 22° | 91° | 21" | 56" |
| Westminster, CO | 19° | 89° | 16" | 55" |
| Chadron, NE | 14° | 89° | 18" | 50" |
| Colby, KS | 17° | 91° | 20" | 27" |
| Suncrest, WA | 23° | 87° | 16" | 48" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Millcreek averaged 1.9° warmer than the 1900s. The biggest change is in March (+3.5°).
A bigger shift than in 84% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Millcreek compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Millcreek’s place among Utah’s.
Millcreek weather by month
Highs, lows and precipitation from NOAA’s grid at Millcreek’s center; snow, wet days and snow on the ground from Holladay 0.5 Ese, UT. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 38° | 22° | 1.8" | 12.7" | 10 | 22° – 36° |
| February | 44° | 25° | 1.7" | 10.0" | 9 | 28° – 42° |
| March | 54° | 33° | 2.2" | 8.6" | 10 | 38° – 49° |
| April | 60° | 38° | 2.8" | 4.2" | 11 | 44° – 55° |
| May | 71° | 46° | 2.6" | 0.0" | 11 | 52° – 63° |
| June | 82° | 55° | 1.2" | 0.0" | 5 | 62° – 75° |
| July | 91° | 62° | 0.6" | 0.0" | 4 | 68° – 81° |
| August | 89° | 61° | 0.8" | 0.0" | 5 | 70° – 80° |
| September | 79° | 52° | 1.5" | 0.0" | 6 | 62° – 70° |
| October | 65° | 40° | 1.9" | 0.8" | 8 | 45° – 58° |
| November | 50° | 30° | 1.6" | 6.2" | 8 | 32° – 47° |
| December | 39° | 23° | 1.8" | 13.3" | 10 | 24° – 36° |
| Year | 63° | 40° | 20.5" | 55.8" | 97 |
How much a month can swing
A normal is an average. November swings the most: from 1991 to 2020 its average ranged from 32° to 47°. September is the most reliable, staying within 8°.
Where Millcreek’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Millcreek’s center.
- Snow: Holladay 0.5 Ese, UT (NOAA station in town).
- Frost, freezing nights, 90° and 100° days, heating and cooling: Cottonwood Weir, UT, 5 miles from the city’s center point, 450 ft higher; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Millcreek’s climate
What is the weather like in Millcreek?
A typical July afternoon reaches 91°, a January night drops to 22°, and about 56 inches of snow falls in a normal winter. Milder January nights than 50% of U.S. towns; hotter July afternoons than 83% of U.S. towns.
How cold does it get in Millcreek in winter?
January nights average 22°. About 112 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 22°.
How much snow does Millcreek get?
About 56 inches in a normal winter at Holladay 0.5 Ese, UT, most of it in January and December.
How hot does it get in Millcreek?
July, with a typical high of 91° and a low of 62°. About 48 days a year reach 90° and 1 reach 100° (Cottonwood Weir, UT).
When is the first and last frost in Millcreek?
In half of years the last spring frost (32°) comes by April 29 and the first fall frost by October 22, about 174 frost-free days, at Cottonwood Weir, UT.
What growing zone is Millcreek in?
Zone 7b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 6°.
What is the best time of year to visit Millcreek?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Millcreek getting warmer?
Yes: 1991–2020 averaged 1.9° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 84% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Millcreek.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.