West Valley City, Utah Weather
Pikas hayfeeding in granite peaks. Day 76 of spring. Read this microseason across nine climate regions →
West Valley City weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Overcast——88°56°—
- ThursdayJun 4Overcast——85°63°-3°
- FridayJun 5Clear——84°59°-1°
- SaturdayJun 6Overcast——93°68°+9°
- SundayJun 7Overcast——78°56°-15°
- MondayJun 8Light Drizzle——80°50°+2°
- TuesdayJun 9Overcast——87°57°+7°
Ozone at AQI 70 now. AQI flat over the last 6 hours (within ±3 points). With UV 8.8 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 82 by mid-afternoon.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 70 now. With UV 8.8 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 82 by mid-afternoon.
- Present
- AQI 70
- UV peak
- 8.8 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 82
PM × Wind × Precip
PM2.5/PM10 ratio 0.42 with 7 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.42
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- transport
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
The higher the clouds, the finer the weather.
- Moonrise
- 5:25 AM
- Moonset
- 2:27 PM
- In sign
- ♑︎ Capricorn
Pikas hayfeeding in granite peaks
West Valley City at a glance
- Today vs. normal: 12°F above the seasonal normal for this latitude
- Last frost: April 20 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Warm-season window is open
As of June 3, the last spring frost has passed for most years. Transplant tomatoes, peppers, eggplants, basil, and cucurbits (cucumbers, squash, melons) now. Direct-sow beans and corn into warm soil.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | — | — |
| April | lettuce, peas, spinach, radishes | — |
| May | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | tomatoes, peppers, beans, squash | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | — | — |
| December | — | — |
A year in weather
July is West Valley City's warmest month with a mean temperature near 81°F, and January is the coldest, averaging about 34°F. Rainfall reaches its annual maximum in April at 2.5 inches and drops to its low point of 0.6 inches in July.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 34° | 1.5″ | 5 |
| February | 39° | 1.4″ | 5 |
| March | 47° | 2.0″ | 5 |
| April | 53° | 2.5″ | 6 |
| May | 62° | 2.1″ | 5 |
| June | 72° | 1.1″ | 3 |
| July | 81° | 0.6″ | 2 |
| August | 79° | 0.6″ | 2 |
| September | 69° | 1.3″ | 3 |
| October | 56° | 1.4″ | 4 |
| November | 44° | 1.6″ | 4 |
| December | 34° | 1.6″ | 5 |
Regional context
West Valley City belongs to a cold semi-arid climate region. Nearby cities in this cohort share similar temperature ranges, seasonal rhythms, and growing conditions.
Similar climates: Salt Lake City, UT, Provo, UT, Ogden, UT, Logan, UT, West Jordan, UT.
Naturalist notes
By late May, yellow sweet clover (Melilotus officinalis) is flowering along roadsides and open lots in the Salt Lake Valley.
Barn swallows return to the area in April and can be seen feeding over open water and fields through late spring.
Frequently asked
- When does it freeze in West Valley City?
- The last spring frost in West Valley City usually occurs around mid-April, and the first fall frost arrives near mid-November.
- What is the rainy season in West Valley City?
- April ranks as the wettest month, averaging about 2.5 inches of rain, out of an annual total near 18 inches.
- What is the warmest month in West Valley City?
- July typically brings the highest temperatures, with a mean near 81°F.
- What is the coldest month in West Valley City?
- January records the coldest average temperatures, roughly 34°F.
- When can I start a vegetable garden in West Valley City?
- Cool-season crops such as peas and lettuce can be sown around the last spring frost in mid-April; warm-season crops like tomatoes and peppers should wait an extra 1 to 2 weeks.
- How many rainy days does West Valley City get?
- West Valley City sees about 48 rainy days per year.
- What hardiness zone is West Valley City?
- The USDA hardiness zone for West Valley City reflects the lowest average winter temperature; use the USDA's online tool with a city ZIP code to check the current zone designation.
Climate
West Valley City, Utah experiences a cold semi-arid climate. Mean temperatures swing from 34°F in January to 81°F in July, a seasonal range of 47 degrees.
The city collects about 18 inches of precipitation annually, distributed across roughly 48 rainy days.
Latitude (40.7°N), nearby water bodies, and elevation set the year's cadence. These factors determine plant viability, frost timing, and the daily weather narrative.