Climate averages 1991–2020
West Valley City weather
by month.
See how the year changes. July has the highest average daily maximum; July has the lowest average monthly rainfall.
Pleasant-weather months by our simple rule: JuneSeptember
Long-term climate patterns, not a forecast for a particular trip.
Across the year West Valley City averages a daytime high of 16.2°C and a nighttime low of 4.6°C, with about 492 mm of rain on roughly 87 days. July is the warmest month (average high 32.5°C) and January the coolest (1.7°C). April is the wettest month with 67 mm; July is the driest with 11 mm.
Months with pleasant weather by a simple rule (average high between 18°C and 29°C, average low of at least 5°C and at most 8 rain days): June and September. This looks at temperature and rain only, not humidity, wind, sea temperature or crowds.
The annual picture
A year in West Valley City
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
West Valley City climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 1.7°C-7.1°C | -7.1°C | 52 | 9.7 | 9.610 h |
| February | 4.1°C-5.1°C | -5.1°C | 45 | 8.2 | 10.611 h |
| March | 9.9°C-1.3°C | -1.3°C | 50 | 9.5 | 11.912 h |
| April | 14.4°C2.9°C | 2.9°C | 67 | 11.2 | 13.313 h |
| May | 20.4°C7.9°C | 7.9°C | 56 | 9.1 | 14.414 h |
| June | 26.9°C13.3°C | 13.3°C | 27 | 4.4 | 15.015 h |
| July | 32.5°C18.4°C | 18.4°C | 11 | 2.8 | 14.815 h |
| August | 31.5°C17.7°C | 17.7°C | 12 | 3.4 | 13.814 h |
| September | 25.4°C12.3°C | 12.3°C | 34 | 4.7 | 12.513 h |
| October | 17.0°C5.4°C | 5.4°C | 45 | 6.6 | 11.211 h |
| November | 8.6°C-1.7°C | -1.7°C | 44 | 8.2 | 10.010 h |
| December | 2.0°C-7.0°C | -7.0°C | 49 | 8.9 | 9.39 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
Nearby cities
- West JordanUnited States · 11 kmHigh 16.5°C · Low 4.0°C · 455 mm rain a year
- Salt Lake CityUnited States · 12 kmHigh 16.1°C · Low 4.4°C · 492 mm rain a year
- LaytonUnited States · 41 kmHigh 15.2°C · Low 3.8°C · 474 mm rain a year
- OremUnited States · 51 kmHigh 15.1°C · Low 4.1°C · 433 mm rain a year
- ProvoUnited States · 59 kmHigh 15.2°C · Low 4.6°C · 433 mm rain a year
- OgdenUnited States · 59 kmHigh 15.4°C · Low 3.8°C · 503 mm rain a year
- Saint GeorgeUnited States · 422 kmHigh 23.2°C · Low 11.8°C · 259 mm rain a year
- BoiseUnited States · 475 kmHigh 17.3°C · Low 5.8°C · 311 mm rain a year
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsWhat do the high and low temperatures mean?
We average the daily maximum and daily minimum for each calendar month over 1991–2020. They are not record extremes, a forecast range or temperatures at a fixed time of day.
How is a rain day counted?
A local calendar day (standard time, UTC-7, no daylight saving) with at least 1 mm of total precipitation counts as one rain day. We count these for each year and month, then average across 30 years. The average does not predict which days will be wet.
Where do the numbers come from?
ERA5-Land (temperature) and ERA5 (precipitation) reanalysis from the Copernicus Climate Change Service, read from the Open-Meteo open-data archive. Temperature comes from the 0.1° model cell at 40.70°, -112.00° (1 km from the city centre), adjusted up by 0.1°C for the difference between the city's elevation (1,316 m) and the cell's (1,339 m). Rain comes from the 0.25° cell at 40.75°, -112.00°. Salt Lake City lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells. These are model estimates, not weather-station readings; coast, hills and city streets can differ.
Does this page show sunshine, humidity or sea temperature?
No. The data used here contain air temperature and precipitation only. Daylight hours are calculated from the city's latitude (sunrise to sunset), not measured sunshine.