| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 3.9° | -4.7° | 35.9mm | 10.5 | 17 |
| February | 6.9° | -2.7° | 34.7mm | 9.4 | 32 |
| March | 12.6° | 1.4° | 47.1mm | 9.7 | 56 |
| April | 16.5° | 4.5° | 52.8mm | 10 | 69 |
| May | 22.4° | 9.3° | 41.6mm | 8.6 | 83 |
| June | 29.3° | 14.7° | 22.9mm | 4.6 | 82 |
| July | 34.8° | 20° | 11.4mm | 3.8 | 61 |
| August | 33.1° | 18.6° | 19mm | 4.9 | 66 |
| September | 27.2° | 13.1° | 25.9mm | 5.3 | 89 |
| October | 18.7° | 5.9° | 31.1mm | 6.3 | 83 |
| November | 10.7° | 0° | 31.1mm | 7.6 | 52 |
| December | 4.1° | -4.3° | 37.8mm | 10 | 20 |
January in West Valley City averages a daily high of 3.9°C with nights around -4.7°C. Expect roughly 10.5 wet days totalling 35.9mm. A hard month to visit for comfort alone.
February in West Valley City averages a daily high of 6.9°C with nights around -2.7°C. Expect roughly 9.4 wet days totalling 34.7mm. A hard month to visit for comfort alone.
March in West Valley City averages a daily high of 12.6°C with nights around 1.4°C. Expect roughly 9.7 wet days totalling 47.1mm. Generally workable, with some weather to plan around.
April in West Valley City averages a daily high of 16.5°C with nights around 4.5°C. Expect roughly 10 wet days totalling 52.8mm. Generally workable, with some weather to plan around.
May in West Valley City averages a daily high of 22.4°C with nights around 9.3°C. Expect roughly 8.6 wet days totalling 41.6mm. Comfortable conditions for being outdoors all day.
June in West Valley City averages a daily high of 29.3°C with nights around 14.7°C. Expect roughly 4.6 wet days totalling 22.9mm. Comfortable conditions for being outdoors all day.
July in West Valley City averages a daily high of 34.8°C with nights around 20°C. Expect roughly 3.8 wet days totalling 11.4mm. Generally workable, with some weather to plan around.
August in West Valley City averages a daily high of 33.1°C with nights around 18.6°C. Expect roughly 4.9 wet days totalling 19mm. Generally workable, with some weather to plan around.
September in West Valley City averages a daily high of 27.2°C with nights around 13.1°C. Expect roughly 5.3 wet days totalling 25.9mm. Comfortable conditions for being outdoors all day.
October in West Valley City averages a daily high of 18.7°C with nights around 5.9°C. Expect roughly 6.3 wet days totalling 31.1mm. Comfortable conditions for being outdoors all day.
November in West Valley City averages a daily high of 10.7°C with nights around 0°C. Expect roughly 7.6 wet days totalling 31.1mm. Demanding conditions — pack for it and plan indoor options.
December in West Valley City averages a daily high of 4.1°C with nights around -4.3°C. Expect roughly 10 wet days totalling 37.8mm. A hard month to visit for comfort alone.
Each month scores out of 100. It starts at 100 and loses points for daytime highs outside a 20–27°C band, for wet days, and for nights below 2°C. Nothing else is weighted in — no crowd data, no prices, no opinion. West Valley City peaks at 89.
Based on 30 years of records, May–June scores highest for comfort in West Valley City, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 34.8°C.
April is the wettest, averaging 52.8mm of rain across roughly 10 wet days.
January is the coolest month, with average daily highs around 3.9°C.