| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 1.5° | -4.3° | 51.6mm | 14.6 | 6 |
| February | 4.1° | -3.6° | 37.1mm | 10.9 | 19 |
| March | 9.2° | -0.6° | 45.9mm | 11.8 | 38 |
| April | 13.9° | 2.3° | 29.6mm | 9.8 | 61 |
| May | 19.5° | 6.9° | 38.6mm | 9.5 | 79 |
| June | 23.5° | 10.5° | 30.3mm | 7.5 | 85 |
| July | 29.8° | 14.4° | 7.9mm | 3.3 | 82 |
| August | 29° | 13.8° | 11.5mm | 3.3 | 85 |
| September | 23.2° | 9.3° | 15.9mm | 5.1 | 90 |
| October | 14.4° | 3.3° | 33.8mm | 8.9 | 64 |
| November | 6° | -1.2° | 54.7mm | 13.1 | 24 |
| December | 1° | -4.5° | 63.9mm | 14.4 | 6 |
January in Spokane averages a daily high of 1.5°C with nights around -4.3°C. Expect roughly 14.6 wet days totalling 51.6mm. A hard month to visit for comfort alone.
February in Spokane averages a daily high of 4.1°C with nights around -3.6°C. Expect roughly 10.9 wet days totalling 37.1mm. A hard month to visit for comfort alone.
March in Spokane averages a daily high of 9.2°C with nights around -0.6°C. Expect roughly 11.8 wet days totalling 45.9mm. Demanding conditions — pack for it and plan indoor options.
April in Spokane averages a daily high of 13.9°C with nights around 2.3°C. Expect roughly 9.8 wet days totalling 29.6mm. Generally workable, with some weather to plan around.
May in Spokane averages a daily high of 19.5°C with nights around 6.9°C. Expect roughly 9.5 wet days totalling 38.6mm. Comfortable conditions for being outdoors all day.
June in Spokane averages a daily high of 23.5°C with nights around 10.5°C. Expect roughly 7.5 wet days totalling 30.3mm. Comfortable conditions for being outdoors all day.
July in Spokane averages a daily high of 29.8°C with nights around 14.4°C. Expect roughly 3.3 wet days totalling 7.9mm. Comfortable conditions for being outdoors all day.
August in Spokane averages a daily high of 29°C with nights around 13.8°C. Expect roughly 3.3 wet days totalling 11.5mm. Comfortable conditions for being outdoors all day.
September in Spokane averages a daily high of 23.2°C with nights around 9.3°C. Expect roughly 5.1 wet days totalling 15.9mm. Comfortable conditions for being outdoors all day.
October in Spokane averages a daily high of 14.4°C with nights around 3.3°C. Expect roughly 8.9 wet days totalling 33.8mm. Generally workable, with some weather to plan around.
November in Spokane averages a daily high of 6°C with nights around -1.2°C. Expect roughly 13.1 wet days totalling 54.7mm. A hard month to visit for comfort alone.
December in Spokane averages a daily high of 1°C with nights around -4.5°C. Expect roughly 14.4 wet days totalling 63.9mm. 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. Spokane peaks at 90.
Based on 30 years of records, June–September scores highest for comfort in Spokane, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 29.8°C.
December is the wettest, averaging 63.9mm of rain across roughly 14.4 wet days.
December is the coolest month, with average daily highs around 1°C.