| 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 | 58.8°F | Sep 20 |
| Albeni Falls forebay | ALFI | Jul 08 | Sep 14 | 69 | 77.2°F | Jul 23 |
| Albeni Falls tailwater | ALQI | Jul 25 | Sep 15 | 53 | 76.7°F | Jul 25 |
| Chief Joseph Dam forebay | CHJ | n/a | n/a | 0 | 68.0°F | Sep 05 |
| Chief Joseph tailwater | CHQW | n/a | n/a | 0 | 67.6°F | Sep 03 |
| Anatone - Snake River Near Anatone | ANQW | Jul 03 | Sep 26 | 82 | 74.9°F | Aug 02 |
| Dworshak - N. Fork Clearwater R at Ahsahka | DWQI | n/a | n/a | 0 | 51.1°F | Nov 08 |
| Peck - Clearwater River at Peck | PEKI | n/a | n/a | 0 | 58.8°F | Jun 26 |
| Lewiston - Clearwater River near Lewiston | LEWI | Jan 13 | Jan 16 | 3 | 425.2°F | Jan 14 |
| Lower Granite Dam forebay | LWG | Jul 17 | Aug 11 | 11 | 70.7°F | Aug 09 |
| Lower Granite tailwater - Snake R. below dam | LGNW | Jul 17 | Aug 12 | 10 | 69.6°F | Aug 09 |
| Little Goose Dam forebay | LGSA | Jul 09 | Aug 27 | 47 | 71.1°F | Aug 05 |
| Little Goose Dam tailwater (Snake R. below Little Goose) | LGSW | Jul 08 | Aug 26 | 46 | 70.7°F | Aug 15 |
| Lower Monumental Dam forebay on Snake River | LMNA | Jul 10 | Sep 07 | 55 | 71.2°F | Jul 24 |
| Lower Monumental tailwater below the dam on Snake River | LMNW | Jul 09 | Sep 07 | 57 | 71.5°F | Aug 09 |
| Ice Harbor Dam forebay | IHRA | Jul 11 | Sep 16 | 68 | 72.0°F | Aug 14 |
| Ice Harbor tailwater- Snake R. below Goose Is. | IDSW | Jul 10 | Sep 15 | 68 | 72.2°F | Aug 05 |
| Pasco - Columbia Rivers | PAQW | Aug 03 | Sep 15 | 37 | 70.2°F | Sep 10 |
| McNary Dam forebay on Columbia R. | MCNA | Jul 14 | Sep 16 | 65 | 71.1°F | Aug 11 |
| McNary Dam tailwater on Columbia R. | MCPW | Jul 13 | Sep 17 | 67 | 71.0°F | Aug 11 |
| John Day Dam forebay | JDY | Jul 09 | Sep 22 | 75 | 198.9°F | Aug 16 |
| John Day Dam tailwater | JHAW | Jul 09 | Sep 21 | 75 | 71.7°F | Aug 12 |
| The Dalles Dam forebay on Columbia R. | TDA | Jul 10 | Sep 15 | 68 | 71.9°F | Aug 11 |
| The Dalles tailwater Downstream | TDDO | Jul 08 | Sep 16 | 71 | 72.0°F | Aug 11 |
| Bonneville Dam forebay | BON | Jul 08 | Sep 14 | 69 | 71.8°F | Aug 03 |
| Cascade Island | CCIW | Jul 08 | Sep 14 | 69 | 71.8°F | Aug 03 |
| Warrendale | WRNO | Jul 08 | Sep 14 | 69 | 71.8°F | Aug 03 |
| Camas / Washougal | CWMW | n/a | n/a | 0 | n/a | n/a |
| Systemwide Project-Day Total | 1234 | |||||
| Systemwide Max | Jan 13 | Sep 26 | 425.2°F | Jan 14 | ||