| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 4° | -4.3° | 33.4mm | 10 | 19 |
| February | 8.4° | -3.3° | 20.1mm | 7 | 41 |
| March | 13.6° | -0.9° | 16mm | 6.6 | 62 |
| April | 17.9° | 1.7° | 13.3mm | 5.3 | 82 |
| May | 23.2° | 6.5° | 18.2mm | 6.1 | 88 |
| June | 27.3° | 10° | 9.3mm | 4.1 | 91 |
| July | 32.6° | 13.2° | 4.4mm | 1.9 | 74 |
| August | 31.5° | 12.2° | 5.6mm | 2.4 | 77 |
| September | 26.2° | 7.4° | 6.3mm | 3.3 | 93 |
| October | 18° | 2° | 15.5mm | 5.8 | 82 |
| November | 9.4° | -2.5° | 23.3mm | 8.8 | 42 |
| December | 3.3° | -4.8° | 37.6mm | 10.8 | 15 |
January in Yakima averages a daily high of 4°C with nights around -4.3°C. Expect roughly 10 wet days totalling 33.4mm. A hard month to visit for comfort alone.
February in Yakima averages a daily high of 8.4°C with nights around -3.3°C. Expect roughly 7 wet days totalling 20.1mm. Demanding conditions — pack for it and plan indoor options.
March in Yakima averages a daily high of 13.6°C with nights around -0.9°C. Expect roughly 6.6 wet days totalling 16mm. Generally workable, with some weather to plan around.
April in Yakima averages a daily high of 17.9°C with nights around 1.7°C. Expect roughly 5.3 wet days totalling 13.3mm. Comfortable conditions for being outdoors all day.
May in Yakima averages a daily high of 23.2°C with nights around 6.5°C. Expect roughly 6.1 wet days totalling 18.2mm. Comfortable conditions for being outdoors all day.
June in Yakima averages a daily high of 27.3°C with nights around 10°C. Expect roughly 4.1 wet days totalling 9.3mm. Comfortable conditions for being outdoors all day.
July in Yakima averages a daily high of 32.6°C with nights around 13.2°C. Rain is rare — about 1.9 wet days and 4.4mm across the month. Generally workable, with some weather to plan around.
August in Yakima averages a daily high of 31.5°C with nights around 12.2°C. Rain is rare — about 2.4 wet days and 5.6mm across the month. Comfortable conditions for being outdoors all day.
September in Yakima averages a daily high of 26.2°C with nights around 7.4°C. Expect roughly 3.3 wet days totalling 6.3mm. Comfortable conditions for being outdoors all day.
October in Yakima averages a daily high of 18°C with nights around 2°C. Expect roughly 5.8 wet days totalling 15.5mm. Comfortable conditions for being outdoors all day.
November in Yakima averages a daily high of 9.4°C with nights around -2.5°C. Expect roughly 8.8 wet days totalling 23.3mm. Demanding conditions — pack for it and plan indoor options.
December in Yakima averages a daily high of 3.3°C with nights around -4.8°C. Expect roughly 10.8 wet days totalling 37.6mm. 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. Yakima peaks at 93.
Based on 30 years of records, May–June scores highest for comfort in Yakima, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 32.6°C.
December is the wettest, averaging 37.6mm of rain across roughly 10.8 wet days.
December is the coolest month, with average daily highs around 3.3°C.