| Gauge Name |
Gauge ID |
Date of First Daily Average Temperature over 68°F |
Date of Last Daily Average Temperature over 68°F |
Days with Daily Average Temperature over 68°F |
Maximum Daily Temperature During Year |
Date of Maximum Daily Temperature |
|---|---|---|---|---|---|---|
| Libby Dam and Lake Koocanusa near Libby | LBQM | n/a | n/a | 0 | 58.9°F | Sep 14 |
| Albeni Falls forebay | ALFI | Aug 02 | Sep 15 | 45 | 71.5°F | Aug 29 |
| Albeni Falls tailwater | ALQI | Aug 02 | Sep 12 | 38 | 71.5°F | Aug 29 |
| Chief Joseph Dam forebay | CHJ | n/a | n/a | 0 | 65.9°F | Sep 11 |
| Chief Joseph tailwater | CHQW | n/a | n/a | 0 | 65.5°F | Sep 25 |
| Anatone - Snake River Near Anatone | ANQW | Jul 24 | Sep 25 | 64 | 74.1°F | Aug 29 |
| Dworshak - N. Fork Clearwater R at Ahsahka | DWQI | n/a | n/a | 0 | 49.1°F | Nov 11 |
| Peck - Clearwater River at Peck | PEKI | n/a | n/a | 0 | 56.5°F | Aug 03 |
| Lewiston - Clearwater River near Lewiston | LEWI | n/a | n/a | 0 | 58.2°F | Sep 19 |
| Lower Granite Dam forebay | LWG | n/a | n/a | 0 | 67.7°F | Aug 06 |
| Lower Granite tailwater - Snake R. below dam | LGNW | n/a | n/a | 0 | 67.9°F | Aug 07 |
| Little Goose Dam forebay | LGSA | Aug 04 | Aug 17 | 11 | 69.3°F | Aug 11 |
| Little Goose Dam tailwater (Snake R. below Little Goose) | LGSW | Aug 07 | Aug 13 | 7 | 68.8°F | Aug 12 |
| Lower Monumental Dam forebay on Snake River | LMNA | Aug 06 | Aug 31 | 17 | 69.4°F | Aug 15 |
| Lower Monumental tailwater below the dam on Snake River | LMNW | Aug 07 | Aug 28 | 16 | 69.1°F | Aug 12 |
| Ice Harbor Dam forebay | IHRA | Aug 04 | Sep 14 | 32 | 70.0°F | Aug 16 |
| Ice Harbor tailwater- Snake R. below Goose Is. | IDSW | Aug 02 | Sep 16 | 42 | 70.2°F | Aug 16 |
| Pasco - Columbia Rivers | PAQW | Aug 26 | Sep 14 | 7 | 68.4°F | Sep 13 |
| McNary Dam forebay on Columbia R. | MCNA | Aug 12 | Sep 14 | 25 | 69.8°F | Aug 28 |
| McNary Dam tailwater on Columbia R. | MCPW | Aug 19 | Oct 12 | 27 | 85.4°F | Oct 11 |
| John Day Dam forebay | JDY | Aug 06 | Sep 13 | 39 | 70.7°F | Aug 28 |
| John Day Dam tailwater | JHAW | Aug 05 | Sep 22 | 49 | 70.5°F | Aug 28 |
| The Dalles Dam forebay on Columbia R. | TDA | Aug 06 | Sep 14 | 39 | 70.6°F | Aug 28 |
| The Dalles tailwater Downstream | TDDO | Aug 05 | Sep 24 | 47 | 70.6°F | Aug 28 |
| Bonneville Dam forebay | BON | Aug 12 | Sep 14 | 33 | 70.7°F | Aug 28 |
| Cascade Island | CCIW | Aug 17 | Sep 15 | 29 | 70.6°F | Aug 28 |
| Warrendale | WRNO | Aug 12 | Sep 14 | 32 | 70.8°F | Aug 28 |
| Camas / Washougal | CWMW | Aug 04 | Sep 14 | 37 | 71.1°F | Aug 28 |
| Systemwide Project-Day Total | 636 | |||||
| Systemwide Max | Jul 24 | Oct 12 | 85.4°F | Oct 11 | ||