| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 8.4° | 3.2° | 164.8mm | 19 | 33 |
| February | 10° | 3.5° | 120.3mm | 15.7 | 38 |
| March | 12.9° | 4.8° | 124.7mm | 18.3 | 47 |
| April | 16° | 6.6° | 90mm | 16 | 57 |
| May | 19.9° | 9.6° | 64.7mm | 11.8 | 76 |
| June | 23° | 12° | 39.3mm | 8.6 | 83 |
| July | 27.2° | 14.6° | 9mm | 2.7 | 94 |
| August | 27.2° | 15° | 14.4mm | 3.1 | 93 |
| September | 23.8° | 12.8° | 45.6mm | 6.9 | 86 |
| October | 17.2° | 9° | 100.7mm | 13.3 | 64 |
| November | 11.4° | 5.6° | 171.7mm | 18.4 | 42 |
| December | 7.7° | 2.9° | 198.2mm | 19.1 | 31 |
January in Tigard averages a daily high of 8.4°C with nights around 3.2°C. Expect roughly 19 wet days totalling 164.8mm. A hard month to visit for comfort alone.
February in Tigard averages a daily high of 10°C with nights around 3.5°C. Expect roughly 15.7 wet days totalling 120.3mm. Demanding conditions — pack for it and plan indoor options.
March in Tigard averages a daily high of 12.9°C with nights around 4.8°C. Expect roughly 18.3 wet days totalling 124.7mm. Demanding conditions — pack for it and plan indoor options.
April in Tigard averages a daily high of 16°C with nights around 6.6°C. Expect roughly 16 wet days totalling 90mm. Generally workable, with some weather to plan around.
May in Tigard averages a daily high of 19.9°C with nights around 9.6°C. Expect roughly 11.8 wet days totalling 64.7mm. Comfortable conditions for being outdoors all day.
June in Tigard averages a daily high of 23°C with nights around 12°C. Expect roughly 8.6 wet days totalling 39.3mm. Comfortable conditions for being outdoors all day.
July in Tigard averages a daily high of 27.2°C with nights around 14.6°C. Rain is rare — about 2.7 wet days and 9mm across the month. Comfortable conditions for being outdoors all day.
August in Tigard averages a daily high of 27.2°C with nights around 15°C. Expect roughly 3.1 wet days totalling 14.4mm. Comfortable conditions for being outdoors all day.
September in Tigard averages a daily high of 23.8°C with nights around 12.8°C. Expect roughly 6.9 wet days totalling 45.6mm. Comfortable conditions for being outdoors all day.
October in Tigard averages a daily high of 17.2°C with nights around 9°C. Expect roughly 13.3 wet days totalling 100.7mm. Generally workable, with some weather to plan around.
November in Tigard averages a daily high of 11.4°C with nights around 5.6°C. Expect roughly 18.4 wet days totalling 171.7mm. Demanding conditions — pack for it and plan indoor options.
December in Tigard averages a daily high of 7.7°C with nights around 2.9°C. Expect roughly 19.1 wet days totalling 198.2mm. 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. Tigard peaks at 94.
Based on 30 years of records, July–September scores highest for comfort in Tigard, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 27.2°C.
December is the wettest, averaging 198.2mm of rain across roughly 19.1 wet days.
December is the coolest month, with average daily highs around 7.7°C.