Tooele, Utah climate: Normal weather by month, frost dates and records
Tooele's normal year runs from 21°F December nights to 91°F July afternoons, with 18.4 inches of precipitation and 75 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.1°C, December lows of −6°C, July highs of 33°C, 468 mm of precipitation a year.
- NOAA stationTooele
- Station IDUSC00428771
- Location40.54°N 112.32°W
- Elevation4,944 ft (1,507 m)
- Population40,919
On October 22, the normal high in Tooele is 61°F and the normal low 38°F, and the chance of measurable rain or snow is 21%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Tooele.
- Jan 39° 21°
- Feb 44° 24°
- Mar 54° 32°
- Apr 61° 38°
- May 71° 46°
- Jun 82° 56°
- Jul 91° 64°
- Aug 90° 63°
- Sep 79° 52°
- Oct 64° 40°
- Nov 49° 29°
- Dec 39° 21°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Tooele each month?
July is the warmest month, with normal highs of 91°F; December the coldest, with normal lows of 21°F. The most precipitation falls in May (2.35 in), the least in August (0.68 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 39°F | 21°F | 29.7°F | 1.49 | 14.0 | 8 | <1 | 28 | 9 h 30 min |
| February | 44°F | 24°F | 34.3°F | 1.67 | 14.6 | 8 | <1 | 23 | 10 h 40 min |
| March | 54°F | 32°F | 43.0°F | 2.21 | 11.1 | 9 | <1 | 17 | 11 h 50 min |
| April | 61°F | 38°F | 49.3°F | 2.34 | 5.9 | 10 | <1 | 8 | 13 h 10 min |
| May | 71°F | 46°F | 58.7°F | 2.35 | 0.4 | 9 | 1 | 1 | 14 h 20 min |
| June | 82°F | 56°F | 68.7°F | 1.05 | 0.0 | 5 | 9 | <1 | 15 h |
| July | 91°F | 64°F | 77.8°F | 0.80 | 0.0 | 5 | 23 | <1 | 14 h 50 min |
| August | 90°F | 63°F | 76.1°F | 0.68 | 0.0 | 6 | 20 | <1 | 13 h 50 min |
| September | 79°F | 52°F | 65.7°F | 1.09 | 0.0 | 6 | 4 | <1 | 12 h 30 min |
| October | 64°F | 40°F | 52.1°F | 1.48 | 1.9 | 7 | <1 | 4 | 11 h 10 min |
| November | 49°F | 29°F | 39.2°F | 1.56 | 10.2 | 7 | <1 | 19 | 10 h |
| December | 39°F | 21°F | 29.6°F | 1.72 | 17.2 | 9 | <1 | 28 | 9 h 20 min |
| Year (annual) | 64°F | 40°F | 52.0°F | 18.44 | 75.3 | 87 | 56 | 128 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 4°C | −6°C | −1.3°C | 38 mm | 36 cm |
| February | 7°C | −4°C | 1.3°C | 42 mm | 37 cm |
| March | 12°C | 0°C | 6.1°C | 56 mm | 28 cm |
| April | 16°C | 3°C | 9.6°C | 59 mm | 15 cm |
| May | 22°C | 8°C | 14.8°C | 60 mm | 1 cm |
| June | 28°C | 13°C | 20.4°C | 27 mm | 0 cm |
| July | 33°C | 18°C | 25.4°C | 20 mm | 0 cm |
| August | 32°C | 17°C | 24.5°C | 17 mm | 0 cm |
| September | 26°C | 11°C | 18.7°C | 28 mm | 0 cm |
| October | 18°C | 5°C | 11.2°C | 38 mm | 5 cm |
| November | 10°C | −2°C | 4.0°C | 40 mm | 26 cm |
| December | 4°C | −6°C | −1.3°C | 44 mm | 44 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00428771; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Tooele?
Normal highs sit between 65°F and 85°F in May, June and September. Of those, June has the fewest days with rain (5).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00428771.
When is the last frost in Tooele?
In Tooele, the last spring frost (32°F) comes after May 2 in half of years and after May 28 in one year in ten; the first autumn frost comes before October 16 in half of years and before October 2 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- May 21 year in 10 after May 28; 9 in 10 after April 16
- First autumn frost, half of years before
- October 161 year in 10 before October 2; 9 in 10 before November 2
NOAA puts the median frost-free season at 165 days, and the season without a hard freeze (28°F) at 193 days.
A hard freeze (28°F) comes after April 16 in half of springs and before October 27 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Tooele in zone 7a in ZIP code 84074. By the map's own method, the average of each year's coldest night over 1991-2020, Tooele's NOAA station is in zone 7a: the coldest night of a typical year reaches 3°F (29 complete years).
Frost dates for every NOAA station in Utah · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00428771; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Tooele?
In a normal year in Tooele, 56 days a year reach 90°F (5 of them 100°F or more), 128 nights fall to 32°F or colder and 87 days bring measurable precipitation.
- Days at 90°F or more
- 56a normal year
- Days at 100°F or more
- 5a normal year
- Nights at 32°F or colder
- 128a normal year
- Days that stay below freezing
- 16high of 32°F or less
- Days with 0.01 inch of precipitation
- 87a normal year
- Days with 1 inch of snow or more
- 22a normal year
The highest temperature in this station's record (since 1896) is 106°F, on July 31, 2000; the lowest is −16°F, on February 10, 1933.
The wettest calendar year on that record is 1983, with 28.32 in; the snowiest season is 1983–84, with 160.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00428771; records: ACIS (NOAA Regional Climate Centers), station USC00428771. Records use complete months only; a month missing more than three days is left out.
How sunny is Tooele?
Over a year 81% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Tooele, 4.8 kWh per square metre a day. July is the sunniest month (88%) and December the cloudiest (66%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 69% | 2.1 |
| February | 71% | 3.1 |
| March | 75% | 4.4 |
| April | 77% | 5.8 |
| May | 80% | 6.8 |
| June | 88% | 7.8 |
| July | 88% | 7.4 |
| August | 87% | 6.6 |
| September | 87% | 5.4 |
| October | 82% | 3.9 |
| November | 75% | 2.5 |
| December | 66% | 1.8 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Tooele need?
A normal year in Tooele brings 5,791 heating degree days, 8% more than the median U.S. place (5,373), and 1,087 cooling degree days, 20% more than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 3,287 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,096 | 0 |
| February | 860 | 0 |
| March | 682 | 0 |
| April | 474 | 3 |
| May | 238 | 41 |
| June | 62 | 174 |
| July | 5 | 399 |
| August | 5 | 348 |
| September | 92 | 113 |
| October | 407 | 7 |
| November | 773 | 0 |
| December | 1,099 | 0 |
| Year (annual) | 5,791 | 1,087 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00428771. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Tooele been warmer than normal lately?
2025 averaged 53.6°F, 1.6°F above the 1991-2020 normal of 52.0°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 54.0°F | +2.0°F | 16.07 | 54.1 |
| 2022 | 53.6°F | +1.6°F | 12.64 | 64.3 |
| 2023 | 51.3°F | −0.7°F | 18.23 | 90.8 |
| 2024 | 53.3°F | +1.3°F | 14.87 | 44.9 |
| 2025 | 53.6°F | +1.6°F | 12.96 | 37.4 |
Over 73 complete years from 1949 to 2025, the station's annual mean temperature rose at a fitted 4.0°F per century (+0.22°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00428771; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Tooele's climate compare?
Tooele is warmer than 75 of the other 96 places with their own NOAA record in Utah, and wetter than 78. Across the 7,247 U.S. stations with normals, its annual mean of 52.0°F is warmer than 49%.
In the Köppen classification computed from these normals, Tooele is Dsa: continental, dry-summer, hot summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Tooele share this climate record?
3 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Stansbury Park, UT11,163 people · 7 mi N
- Erda, UT4,035 people · 6 mi N
- Stockton, UT618 people · 7 mi SW
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Tooele's climate
What is the coldest month in Tooele?
December, with a normal high of 39°F and a normal low of 21°F. The warmest is July (91°F by day, 64°F at night).
Does it snow in Tooele?
Yes: 75 inches in a normal year, falling on 27 days with 0.1 inch or more, the most in December (17.2 inches).
What is the rainiest month in Tooele?
May, with 2.35 in of precipitation in a normal year; the driest is August with 0.68 in.
What plant hardiness zone is Tooele in?
The USDA's 2023 map puts Tooele in zone 7a in ZIP code 84074. By the same method at Tooele's NOAA station, the coldest night of a typical year reaches 3°F (29 years, 1991-2020): zone 7a.
How late can frost come in Tooele?
In half of years the last 32°F night comes after May 2; in one year in ten it comes after May 28. Waiting until May 28 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Tooele in OctoberThis month day by day, its records and recent years
- Utah climateThe statewide normals and every place in the state
- Grantsville, UT11 miles from this station, 51.2°F a year
- Garfield, UT14 miles from this station, 54.4°F a year
- Johnson Pass, UT21 miles from this station, 49.8°F a year
- Draper, UT22 miles from this station, 54.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made