| Point Forecast: Richland WA 46.29N 119.28W (Elev. 361 ft) |
Last Update: 11:46 pm PDT Sep 8, 2026 |
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| Date | 09/09 | 09/10 | ||||||||||||||||||||||
| 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) | 58 | 57 | 55 | 56 | 55 | 58 | 61 | 67 | 71 | 75 | 79 | 83 | 84 | 84 | 86 | 84 | 82 | 78 | 73 | 70 | 68 | 67 | 65 | 63 |
| Dewpoint (°F) | 48 | 48 | 47 | 47 | 47 | 48 | 48 | 49 | 49 | 48 | 48 | 48 | 47 | 46 | 48 | 48 | 51 | 52 | 50 | 48 | 48 | 48 | 49 | 50 |
| Heat Index (°F) | 75 | 79 | 81 | 82 | 82 | 83 | 82 | 81 | 78 | |||||||||||||||
| Surface Wind (mph) | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 3 | 3 | 5 | 5 | 3 | 3 | 3 | 2 | 3 | 3 | 3 | 3 |
| Wind Dir | N | N | N | N | N | E | N | N | N | NE | E | E | SE | SE | SE | SE | SE | S | S | SW | NW | SW | SW | SW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 6 | 4 | 10 | 16 | 21 | 4 | 1 | 2 | 2 | 6 | 2 | 3 | 8 | 6 | 16 | 17 | 27 | 37 | 55 | 49 | 34 | 38 | 31 | 24 |
| 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 (%) | 69 | 72 | 74 | 72 | 74 | 70 | 62 | 53 | 45 | 39 | 34 | 30 | 28 | 27 | 27 | 29 | 34 | 40 | 44 | 46 | 48 | 51 | 56 | 62 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 09/11 | |||||||||||||||||||||||
| 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) | 61 | 60 | 59 | 60 | 59 | 61 | 65 | 72 | 76 | 79 | 81 | 85 | 85 | 85 | 86 | 83 | 80 | 77 | 74 | 70 | 66 | 63 | 60 | 58 |
| Dewpoint (°F) | 49 | 50 | 50 | 51 | 51 | 51 | 50 | 52 | 52 | 52 | 52 | 52 | 50 | 50 | 50 | 49 | 48 | 48 | 48 | 46 | 46 | 46 | 45 | 45 |
| Heat Index (°F) | 76 | 79 | 80 | 83 | 83 | 83 | 84 | 81 | 79 | 77 | ||||||||||||||
| Surface Wind (mph) | 3 | 2 | 2 | 2 | 2 | 5 | 5 | 5 | 6 | 6 | 6 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 5 | 5 | 5 | 5 |
| Wind Dir | SW | S | S | S | S | SW | SW | SW | SW | SW | SW | W | W | W | NW | NW | NW | NW | NW | NW | W | W | W | W |
| Gust | 20 | 20 | 20 | |||||||||||||||||||||
| Sky Cover (%) | 44 | 44 | 83 | 83 | 83 | 70 | 70 | 70 | 68 | 68 | 68 | 54 | 54 | 54 | 67 | 67 | 67 | 52 | 52 | 52 | 15 | 15 | 15 | 10 |
| Precipitation Potential (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 3 | 3 | 3 | 3 | 3 | 1 | 1 | 1 | 1 |
| Relative Humidity (%) | 65 | 69 | 72 | 71 | 74 | 69 | 59 | 49 | 43 | 39 | 36 | 32 | 30 | 30 | 29 | 31 | 33 | 36 | 39 | 43 | 48 | 53 | 58 | 63 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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