Mountlake Terrace, Sunday, 9 August, 02:12
Clear. Feels like 56°. High 77°, low 54°.
In December, Mountlake Terrace, WA averages a high of 42.5° and a low of 35.3°. About 7.5 inches of precipitation fall over the month (19 wet days). The record high is 59.2° (2023) and the record low 4.3° (1968). Normals are computed over the last 60 years.
| Day | High | Low | Chance of precip. | Record high | Record low |
|---|---|---|---|---|---|
| 1 | 43.9° | 36.9° | 62% | 54° (2021) | 12.7° (1985) |
| 2 | 43.9° | 36.5° | 70% | 53.1° (2021) | 22.3° (2014) |
| 3 | 43.9° | 36.1° | 60% | 54.7° (1965) | 26.2° (1984) |
| 4 | 43.3° | 35.4° | 58% | 53.6° (2023) | 19.6° (1970) |
| 5 | 42.8° | 35.2° | 55% | 56.7° (2023) | 21.9° (1994) |
| 6 | 43.2° | 35.2° | 52% | 53.6° (2019) | 22.8° (1972) |
| 7 | 42.6° | 35.4° | 57% | 53.4° (2025) | 15.6° (1972) |
| 8 | 42.6° | 35.6° | 55% | 55.2° (2025) | 15.8° (1972) |
| 9 | 43° | 35.6° | 65% | 54.5° (2025) | 22.6° (1972) |
| 10 | 43.3° | 36.3° | 70% | 56.5° (2025) | 17.4° (1972) |
| 11 | 43.3° | 36.5° | 65% | 55.8° (2025) | 23.9° (1961) |
| 12 | 42.8° | 35.4° | 60% | 53.2° (1995) | 21.7° (1972) |
| 13 | 42.8° | 35.8° | 67% | 54.9° (2025) | 18.1° (1972) |
| 14 | 43.2° | 36.7° | 73% | 52.7° (2025) | 25.5° (1967) |
| 15 | 43.2° | 36.1° | 70% | 57.9° (2025) | 20.8° (1964) |
| 16 | 43.3° | 36.1° | 57% | 54.1° (2025) | 6.8° (1964) |
| 17 | 43° | 35.4° | 57% | 53.4° (2025) | 8.8° (1964) |
| 18 | 42.6° | 35.2° | 58% | 54° (2024) | 15.1° (1964) |
| 19 | 42.1° | 35.1° | 60% | 53.8° (2024) | 15.6° (1990) |
| 20 | 41.5° | 35.2° | 67% | 57.2° (2024) | 9.9° (1990) |
| 21 | 41.9° | 34.7° | 62% | 54.3° (2020) | 6.3° (1990) |
| 22 | 41.7° | 34.2° | 62% | 50.5° (2005) | 11.7° (1990) |
| 23 | 41.7° | 34.2° | 60% | 53.1° (2024) | 12.7° (1990) |
| 24 | 42.1° | 34.7° | 55% | 54.7° (2005) | 13.1° (1983) |
| 25 | 42.1° | 35.2° | 62% | 53.8° (1980) | 20.3° (1964) |
| 26 | 42.3° | 34.9° | 63% | 55.2° (1980) | 20.5° (2021) |
| 27 | 41.7° | 34.5° | 70% | 54.5° (1980) | 18.7° (2021) |
| 28 | 41.4° | 33.8° | 50% | 52.5° (2023) | 9.5° (1968) |
| 29 | 41° | 34° | 50% | 59.2° (2023) | 6.6° (1968) |
| 30 | 41.4° | 33.8° | 60% | 55° (2023) | 4.3° (1968) |
| 31 | 40.8° | 33.1° | 48% | 50.9° (1980) | 12° (1968) |