| Point Forecast: Seattle-Tacoma International Airport WA 47.46N 122.31W (Elev. 400 ft) |
Last Update: 8:01 pm PDT Jul 15, 2025 |
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| Date | 07/15 | 07/16 | ||||||||||||||||||||||
| Hour (PDT) | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| Temperature (°F) | 78 | 76 | 74 | 72 | 70 | 69 | 67 | 66 | 65 | 65 | 67 | 70 | 74 | 76 | 80 | 83 | 86 | 88 | 90 | 90 | 91 | 90 | 88 | 84 |
| Dewpoint (°F) | 52 | 53 | 52 | 52 | 52 | 51 | 52 | 52 | 52 | 53 | 52 | 52 | 53 | 53 | 53 | 53 | 53 | 52 | 52 | 51 | 50 | 50 | 51 | 52 |
| Heat Index (°F) | 78 | 76 | 76 | 80 | 82 | 84 | 86 | 87 | 87 | 88 | 87 | 85 | 82 | |||||||||||
| Surface Wind (mph) | 10 | 9 | 8 | 7 | 7 | 6 | 6 | 5 | 5 | 5 | 3 | 3 | 2 | 3 | 5 | 5 | 6 | 7 | 7 | 8 | 8 | 7 | 7 | 7 |
| Wind Dir | N | NNE | NNE | NNE | NE | NNE | NNE | NNE | NNE | NNE | NNE | NE | S | WSW | WSW | WSW | W | W | W | W | W | WNW | NW | NNW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 2 | 2 | 1 | 2 | 2 | 3 | 3 | 4 | 4 | 5 | 7 | 4 | 5 | 4 | 4 | 4 | 6 | 4 | 5 | 9 | 4 | 6 | 7 | 6 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 40 | 44 | 46 | 49 | 52 | 53 | 58 | 60 | 62 | 64 | 59 | 53 | 47 | 45 | 39 | 35 | 32 | 29 | 27 | 26 | 25 | 25 | 28 | 33 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/17 | |||||||||||||||||||||||
| Hour (PDT) | 21 | 22 | 23 | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| Temperature (°F) | 79 | 75 | 72 | 70 | 68 | 66 | 64 | 62 | 61 | 61 | 62 | 64 | 66 | 69 | 72 | 75 | 78 | 80 | 82 | 84 | 84 | 83 | 81 | 79 |
| Dewpoint (°F) | 52 | 52 | 52 | 53 | 53 | 53 | 53 | 53 | 53 | 53 | 54 | 54 | 54 | 54 | 54 | 54 | 54 | 54 | 52 | 53 | 52 | 52 | 52 | 53 |
| Heat Index (°F) | 79 | 75 | 75 | 78 | 80 | 81 | 82 | 82 | 82 | 80 | 79 | |||||||||||||
| Surface Wind (mph) | 7 | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 8 | 8 | 8 | 8 | 8 | 8 | 7 |
| Wind Dir | NNW | NNW | NNW | NNW | NNW | NW | NW | NW | SW | SW | SW | SSW | SSW | SSW | WSW | WSW | WSW | WNW | WNW | WNW | NNW | NNW | NNW | N |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 5 | 5 | 5 | 7 | 7 | 7 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 7 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 39 | 45 | 50 | 55 | 59 | 63 | 68 | 72 | 75 | 75 | 74 | 70 | 65 | 59 | 53 | 48 | 44 | 40 | 36 | 34 | 33 | 34 | 36 | 40 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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