| Point Forecast: Grand Coulee WA 47.93N 118.99W (Elev. 2037 ft) |
Last Update: 2:12 am PDT Jul 14, 2025 |
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| Date | 07/14 | 07/15 | ||||||||||||||||||||||
| Hour (PDT) | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 |
| Temperature (°F) | 74 | 73 | 73 | 71 | 74 | 77 | 80 | 84 | 87 | 91 | 92 | 92 | 93 | 92 | 92 | 89 | 84 | 81 | 77 | 74 | 72 | 71 | 69 | 69 |
| Dewpoint (°F) | 51 | 50 | 53 | 52 | 53 | 53 | 53 | 52 | 51 | 49 | 48 | 45 | 45 | 44 | 44 | 46 | 48 | 48 | 49 | 51 | 51 | 51 | 51 | 52 |
| Heat Index (°F) | 77 | 80 | 82 | 85 | 88 | 89 | 88 | 89 | 88 | 88 | 86 | 82 | 80 | 77 | ||||||||||
| Surface Wind (mph) | 10 | 9 | 10 | 10 | 9 | 13 | 10 | 11 | 16 | 16 | 16 | 16 | 18 | 20 | 28 | 25 | 26 | 26 | 26 | 26 | 18 | 18 | 18 | 17 |
| Wind Dir | W | SW | NW | NW | SW | NW | W | W | NW | NW | NW | NW | NW | NW | NW | NW | NW | N | N | N | N | N | N | N |
| Gust | 24 | 24 | 24 | 28 | 28 | 28 | 45 | 45 | 45 | 37 | 37 | 37 | ||||||||||||
| Sky Cover (%) | 14 | 11 | 12 | 24 | 15 | 17 | 9 | 3 | 1 | 0 | 1 | 2 | 6 | 7 | 11 | 11 | 12 | 24 | 20 | 35 | 28 | 22 | 19 | 27 |
| Precipitation Potential (%) | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 2 | 2 | 2 | 7 | 7 | 7 | 8 | 8 | 8 | 11 | 11 | 11 | 12 |
| Relative Humidity (%) | 45 | 44 | 49 | 51 | 47 | 43 | 39 | 33 | 29 | 24 | 22 | 20 | 19 | 19 | 19 | 23 | 29 | 32 | 37 | 44 | 47 | 49 | 53 | 55 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 07/16 | |||||||||||||||||||||||
| Hour (PDT) | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 | 01 | 02 |
| Temperature (°F) | 66 | 66 | 66 | 64 | 66 | 67 | 68 | 72 | 73 | 75 | 77 | 79 | 80 | 81 | 82 | 81 | 80 | 79 | 76 | 73 | 70 | 68 | 66 | 64 |
| Dewpoint (°F) | 50 | 50 | 51 | 49 | 50 | 49 | 49 | 50 | 50 | 50 | 50 | 50 | 49 | 49 | 49 | 48 | 48 | 48 | 48 | 49 | 48 | 48 | 47 | 47 |
| Heat Index (°F) | 75 | 77 | 79 | 79 | 80 | 81 | 80 | 79 | 79 | 76 | ||||||||||||||
| Surface Wind (mph) | 17 | 17 | 15 | 15 | 16 | 17 | 18 | 18 | 17 | 17 | 17 | 16 | 16 | 16 | 14 | 14 | 14 | 14 | 14 | 14 | 10 | 10 | 10 | 7 |
| Wind Dir | N | N | N | N | N | NE | NE | NE | NE | NE | NE | NE | NE | NE | NE | NE | NE | E | E | E | E | E | E | NE |
| Gust | 26 | 26 | 26 | 24 | 24 | 24 | 23 | 23 | 23 | |||||||||||||||
| Sky Cover (%) | 28 | 30 | 25 | 51 | 43 | 42 | 48 | 47 | 45 | 45 | 45 | 31 | 31 | 31 | 13 | 13 | 13 | 8 | 8 | 8 | 12 | 12 | 12 | 7 |
| Precipitation Potential (%) | 12 | 12 | 9 | 9 | 9 | 10 | 10 | 10 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
| Relative Humidity (%) | 57 | 57 | 58 | 59 | 57 | 53 | 51 | 45 | 44 | 42 | 39 | 36 | 34 | 33 | 32 | 32 | 32 | 34 | 37 | 42 | 46 | 49 | 51 | 54 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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