| 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 | 59.3°F | Aug 08 |
| Albeni Falls forebay | ALFI | n/a | n/a | 0 | 40.0°F | Mar 17 |
| Albeni Falls tailwater | ALQI | Jul 16 | Jul 17 | 2 | 68.8°F | Jul 16 |
| Chief Joseph Dam forebay | CHJ | n/a | n/a | 0 | 66.5°F | Sep 19 |
| Chief Joseph tailwater | CHQW | n/a | n/a | 0 | 66.3°F | Sep 20 |
| Anatone - Snake River Near Anatone | ANQW | Jul 17 | Sep 08 | 49 | 73.7°F | Aug 18 |
| Dworshak - N. Fork Clearwater R at Ahsahka | DWQI | n/a | n/a | 0 | n/a | n/a |
| Peck - Clearwater River at Peck | PEKI | n/a | n/a | 0 | 56.4°F | Jul 10 |
| Lewiston - Clearwater River near Lewiston | LEWI | n/a | n/a | 0 | 57.7°F | Sep 19 |
| Lower Granite Dam forebay | LWG | n/a | n/a | 0 | 67.2°F | Aug 18 |
| Lower Granite tailwater - Snake R. below dam | LGNW | n/a | n/a | 0 | 67.1°F | Aug 17 |
| Little Goose Dam forebay | LGSA | Aug 15 | Aug 23 | 7 | 69.6°F | Aug 15 |
| Little Goose Dam tailwater (Snake R. below Little Goose) | LGSW | Aug 15 | Aug 23 | 6 | 68.6°F | Aug 15 |
| Lower Monumental Dam forebay on Snake River | LMNA | Aug 15 | Aug 27 | 13 | 69.5°F | Aug 20 |
| Lower Monumental tailwater below the dam on Snake River | LMNW | Aug 14 | Aug 27 | 14 | 69.4°F | Aug 20 |
| Ice Harbor Dam forebay | IHRA | Jul 28 | Sep 02 | 32 | 70.9°F | Aug 20 |
| Ice Harbor tailwater- Snake R. below Goose Is. | IDSW | Jul 27 | Sep 02 | 37 | 70.6°F | Aug 20 |
| McNary Dam forebay on Columbia R. | MCNA | Aug 05 | Sep 01 | 27 | 70.8°F | Aug 18 |
| McNary Dam tailwater on Columbia R. | MCPW | Aug 04 | Sep 01 | 29 | 70.9°F | Aug 18 |
| John Day Dam forebay | JDY | Jul 25 | Sep 16 | 43 | 72.2°F | Aug 17 |
| John Day Dam tailwater | JHAW | Jul 26 | Sep 17 | 44 | 71.2°F | Aug 23 |
| The Dalles Dam forebay on Columbia R. | TDA | Jul 26 | Sep 12 | 37 | 71.3°F | Aug 17 |
| The Dalles tailwater Downstream | TDDO | Jul 27 | Sep 18 | 41 | 71.5°F | Aug 17 |
| Bonneville Dam forebay | BON | Aug 05 | Aug 31 | 27 | 71.2°F | Aug 17 |
| Cascade Island | CCIW | Jul 28 | Aug 31 | 28 | 71.3°F | Aug 17 |
| Warrendale | WRNO | n/a | n/a | 0 | 67.6°F | Sep 17 |
| Camas / Washougal | CWMW | Jul 15 | Aug 31 | 34 | 71.9°F | Aug 17 |
| Systemwide Total | Jul 15 | Sep 18 | 470 | 73.7°F | Aug 18 | |