| 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 | 58.0°F | Sep 05 |
| Albeni Falls forebay | ALFI | Jun 11 | Aug 30 | 77 | 76.4°F | Jul 04 |
| Albeni Falls tailwater | ALQI | Jun 11 | Sep 01 | 77 | 76.5°F | Jul 04 |
| Chief Joseph Dam forebay | CHJ | n/a | n/a | 0 | 67.6°F | Aug 15 |
| Chief Joseph tailwater | CHQW | n/a | n/a | 0 | 67.5°F | Aug 13 |
| Anatone - Snake River Near Anatone | ANQW | Jun 20 | Sep 12 | 80 | 75.0°F | Aug 13 |
| Dworshak - N. Fork Clearwater R at Ahsahka | DWQI | n/a | n/a | 0 | 50.4°F | Nov 08 |
| Peck - Clearwater River at Peck | PEKI | n/a | n/a | 0 | 61.7°F | Jun 10 |
| Lewiston - Clearwater River near Lewiston | LEWI | n/a | n/a | 0 | 63.4°F | Jun 11 |
| Lower Granite Dam forebay | LWG | Jul 07 | Aug 28 | 24 | 70.5°F | Aug 23 |
| Lower Granite tailwater - Snake R. below dam | LGNW | Jul 06 | Jul 13 | 8 | 70.2°F | Jul 10 |
| Little Goose Dam forebay | LGSA | Jun 20 | Sep 02 | 58 | 71.9°F | Jul 14 |
| Little Goose Dam tailwater (Snake R. below Little Goose) | LGSW | Jun 21 | Aug 29 | 52 | 71.3°F | Jul 14 |
| Lower Monumental Dam forebay on Snake River | LMNA | Jun 24 | Sep 04 | 73 | 71.8°F | Jul 18 |
| Lower Monumental tailwater below the dam on Snake River | LMNW | Jun 24 | Sep 03 | 72 | 71.7°F | Jul 18 |
| Ice Harbor Dam forebay | IHRA | Jun 25 | Sep 07 | 75 | 72.8°F | Jul 23 |
| Ice Harbor tailwater- Snake R. below Goose Is. | IDSW | Jun 24 | Sep 07 | 76 | 73.0°F | Jul 13 |
| Pasco - Columbia Rivers | PAQW | Jun 30 | Aug 29 | 56 | 71.1°F | Aug 13 |
| McNary Dam forebay on Columbia R. | MCNA | Jun 27 | Sep 02 | 68 | 71.9°F | Jul 12 |
| McNary Dam tailwater on Columbia R. | MCPW | Jun 26 | Sep 02 | 69 | 72.1°F | Jul 12 |
| John Day Dam forebay | JDY | Jun 24 | Sep 12 | 78 | 74.3°F | Jul 09 |
| John Day Dam tailwater | JHAW | Jun 24 | Sep 07 | 76 | 73.8°F | Jul 09 |
| The Dalles Dam forebay on Columbia R. | TDA | Jun 22 | Sep 13 | 81 | 73.7°F | Jul 10 |
| The Dalles tailwater Downstream | TDDO | Jun 22 | Sep 13 | 81 | 73.7°F | Jul 10 |
| Bonneville Dam forebay | BON | Jun 24 | Sep 13 | 76 | 73.2°F | Jul 20 |
| Cascade Island | CCIW | Jun 24 | Sep 13 | 76 | 73.2°F | Jul 20 |
| Warrendale | WRNO | Jun 24 | Sep 13 | 75 | 73.3°F | Jul 20 |
| Camas / Washougal | CWMW | Jun 21 | Sep 13 | 80 | 73.9°F | Jul 20 |
| Systemwide Project-Day Total | 1488 | |||||
| Systemwide Max | Jun 11 | Sep 13 | 76.5°F | Jul 04 | ||