Herriman, UT climate
Herriman has chilly, snowy winters and warm summers, with very little rain. A typical July afternoon reaches 90°, a January night drops to 22°, and about 74 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Herriman feels like
Winter
Spring
Summer
Fall
Herriman weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 38° | 22° | 1.2" | 17.4" | 10 | 22 | 24° – 36° |
| February | 43° | 25° | 1.4" | 13.6" | 9 | 18 | 29° – 41° |
| March | 52° | 33° | 1.4" | 9.6" | 9 | 5 | 37° – 49° |
| April | 59° | 38° | 1.7" | 6.2" | 10 | 1 | 44° – 55° |
| May | 69° | 45° | 1.7" | 0.5" | 9 | 0 | 51° – 62° |
| June | 81° | 53° | 0.9" | 0 | 5 | 0 | 61° – 72° |
| July | 90° | 61° | 0.7" | 0 | 4 | 0 | 68° – 80° |
| August | 88° | 60° | 0.9" | 0 | 6 | 0 | 70° – 78° |
| September | 78° | 51° | 1.1" | 0 | 6 | 0 | 60° – 68° |
| October | 63° | 39° | 1.4" | 1.6" | 7 | 0 | 43° – 57° |
| November | 49° | 30° | 1.1" | 8.0" | 7 | 5 | 31° – 46° |
| December | 39° | 22° | 1.2" | 17.5" | 9 | 18 | 26° – 35° |
| Year | 62° | 40° | 14.6" | 74.4" | 93 | 69 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Herriman
Herriman gets 15 inches of rain and melted snow a year. May is the wettest month and July the driest. Rain or snow falls on about 93 days a year. Snow covers the ground about 69 days of the year.
About 159 frost-free days a year
In half of years the last 32° night comes by May 3 and the first one by October 12. That leaves about 159 frost-free days for gardens, shorter than 72% of U.S. towns.
Heating and cooling a home in Herriman
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Herriman, 89% of that work is heating and 11% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
Herriman and its neighbors
Herriman borders 3 towns with climate data. January nights across them vary by 1.2°. Bluffdale has both the coldest January nights (21°) and the hottest July afternoons (92°). Herriman’s January low is 22° and its July high 90°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Herriman compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Herriman averaged 1.6° warmer than the 1900s. The biggest change is in March (+3.0°). The shift is larger than in 78% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Herriman’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. November swings the most: between 1991 and 2020 its average temperature ranged from 31° to 46°. September is the most reliable, staying within 8°.
Common questions about Herriman’s climate
What is the coldest month in Herriman?
January, with a typical high of 38° and a low of 22°.
What is the hottest month in Herriman?
July, with a typical high of 90° and a low of 61°. About 36 days a year reach 90°.
How much snow does Herriman get?
About 74 inches in a normal winter, most of it in December.
When is the first frost in Herriman?
In half of years the first 32° night comes by October 12, and the last spring frost by May 3.
What is the rainiest month in Herriman?
May, with 1.7 inches of rain and melted snow. The year totals 15 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Herriman itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Alpine, UT (13 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.