| Point Forecast: 6 Miles NE Portland International Airport OR 45.66N 122.52W (Elev. 69 m) |
Last Update: 3:41 pm PDT Jul 21, 2026 |
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| Date | 07/21 | 07/22 | ||||||||||||||||||||||
| Hour (PDT) | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 |
| Temperature (°C) | 36 | 36 | 37 | 37 | 36 | 34 | 31 | 28 | 27 | 25 | 23 | 22 | 21 | 21 | 21 | 20 | 21 | 22 | 24 | 28 | 30 | 32 | 34 | 36 |
| Dewpoint (°C) | 16 | 16 | 14 | 15 | 16 | 18 | 17 | 17 | 18 | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 17 | 16 | 17 | 18 | 18 | 18 | 18 | 18 |
| Heat Index (°C) | 36 | 36 | 37 | 37 | 36 | 35 | 31 | 29 | 28 | 25 | 24 | 29 | 31 | 33 | 36 | 37 | ||||||||
| Surface Wind (mph) | 6 | 6 | 7 | 6 | 6 | 5 | 5 | 3 | 2 | 2 | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 3 | 5 | 5 | 6 |
| Wind Dir | NNW | NNW | NNW | NNW | NNW | NNW | NW | NW | NNW | NW | W | W | NW | N | N | N | N | WNW | WNW | WNW | WNW | NW | NW | NW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 26 | 42 | 57 | 55 | 52 | 56 | 44 | 56 | 60 | 47 | 28 | 22 | 9 | 6 | 8 | 14 | 8 | 7 | 9 | 13 | 14 | 15 | 17 | 33 |
| Precipitation Potential (%) | 1 | 1 | 2 | 2 | 3 | 2 | 3 | 3 | 3 | 3 | 2 | 2 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 2 | 3 | 3 |
| Relative Humidity (%) | 31 | 29 | 27 | 28 | 31 | 38 | 45 | 51 | 58 | 63 | 69 | 72 | 75 | 74 | 76 | 77 | 75 | 69 | 62 | 56 | 50 | 43 | 39 | 34 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/23 | |||||||||||||||||||||||
| Hour (PDT) | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 |
| Temperature (°C) | 36 | 37 | 37 | 36 | 35 | 32 | 29 | 27 | 24 | 23 | 21 | 20 | 19 | 18 | 18 | 17 | 18 | 18 | 20 | 21 | 23 | 24 | 26 | 27 |
| Dewpoint (°C) | 17 | 17 | 16 | 17 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 17 | 16 | 17 | 17 | 17 | 18 |
| Heat Index (°C) | 37 | 38 | 38 | 37 | 36 | 32 | 29 | 27 | 24 | 24 | 26 | 28 | ||||||||||||
| Surface Wind (mph) | 7 | 8 | 9 | 9 | 9 | 7 | 7 | 7 | 8 | 8 | 8 | 7 | 7 | 7 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 6 |
| Wind Dir | NW | NNW | NW | NW | NW | WNW | WNW | WNW | S | S | S | S | S | S | S | S | S | SSW | SSW | SSW | SW | SW | SW | W |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 42 | 43 | 58 | 58 | 58 | 57 | 57 | 57 | 60 | 60 | 60 | 58 | 58 | 58 | 40 | 40 | 40 | 61 | 61 | 61 | 55 | 55 | 55 | 27 |
| Precipitation Potential (%) | 4 | 7 | 37 | 28 | 9 | 24 | 16 | 0 | 0 | 0 | 0 | 17 | 35 | 21 | 7 | 7 | 7 | 7 | 7 | 7 | 3 | 3 | 3 | 3 |
| Relative Humidity (%) | 32 | 30 | 29 | 32 | 36 | 43 | 51 | 56 | 64 | 71 | 78 | 82 | 86 | 84 | 86 | 89 | 88 | 84 | 80 | 74 | 69 | 65 | 61 | 58 |
| Rain | -- | -- | Chc | Chc | -- | SChc | SChc | -- | -- | -- | -- | SChc | Chc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | SChc | SChc | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
