| 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 | 60.4°F | Sep 05 |
| Albeni Falls forebay | ALFI | Jul 03 | Sep 10 | 70 | 76.2°F | Jul 28 |
| Albeni Falls tailwater | ALQI | Jul 03 | Sep 10 | 70 | 76.1°F | Jul 28 |
| Chief Joseph Dam forebay | CHJ | n/a | n/a | 0 | 67.5°F | Sep 11 |
| Chief Joseph tailwater | CHQW | n/a | n/a | 0 | n/a | n/a |
| Anatone - Snake River Near Anatone | ANQW | Jun 28 | Sep 14 | 76 | 76.0°F | Jul 25 |
| Dworshak - N. Fork Clearwater R at Ahsahka | DWQI | n/a | n/a | 0 | 51.0°F | Nov 18 |
| Peck - Clearwater River at Peck | PEKI | n/a | n/a | 0 | 64.0°F | Jun 28 |
| Lewiston - Clearwater River near Lewiston | LEWI | n/a | n/a | 0 | 65.3°F | Jun 28 |
| Lower Granite Dam forebay | LWG | Jul 05 | Jul 27 | 5 | 69.2°F | Jul 07 |
| Lower Granite tailwater - Snake R. below dam | LGNW | Jul 01 | Jul 27 | 7 | 69.0°F | Jul 07 |
| Little Goose Dam forebay | LGSA | Jul 03 | Aug 26 | 51 | 70.9°F | Jul 11 |
| Little Goose Dam tailwater (Snake R. below Little Goose) | LGSW | Jul 03 | Aug 21 | 45 | 70.2°F | Jul 11 |
| Lower Monumental Dam forebay on Snake River | LMNA | Jul 05 | Sep 01 | 58 | 70.8°F | Jul 30 |
| Lower Monumental tailwater below the dam on Snake River | LMNW | Jul 05 | Sep 01 | 58 | 70.3°F | Jul 16 |
| Ice Harbor Dam forebay | IHRA | Jul 06 | Sep 12 | 68 | 71.8°F | Jul 30 |
| Ice Harbor tailwater- Snake R. below Goose Is. | IDSW | Jul 05 | Sep 12 | 68 | 72.2°F | Jul 27 |
| Pasco - Columbia Rivers | PAQW | Jul 24 | Sep 13 | 37 | 70.1°F | Aug 21 |
| McNary Dam forebay on Columbia R. | MCNA | Jul 17 | Sep 14 | 59 | 70.5°F | Jul 26 |
| McNary Dam tailwater on Columbia R. | MCPW | Jul 12 | Sep 13 | 61 | 70.8°F | Jul 27 |
| John Day Dam forebay | JDY | Jul 09 | Sep 15 | 68 | 72.2°F | Jul 27 |
| John Day Dam tailwater | JHAW | Jul 10 | Sep 15 | 67 | 72.1°F | Jul 28 |
| The Dalles Dam forebay on Columbia R. | TDA | Jul 09 | Sep 13 | 67 | 72.2°F | Jul 27 |
| The Dalles tailwater Downstream | TDDO | Jul 09 | Sep 13 | 67 | 72.2°F | Jul 27 |
| Bonneville Dam forebay | BON | Jul 10 | Sep 12 | 64 | 71.8°F | Jul 25 |
| Cascade Island | CCIW | Jul 10 | Sep 12 | 64 | 71.8°F | Jul 25 |
| Warrendale | WRNO | Jul 10 | Sep 12 | 16 | 69.4°F | Aug 30 |
| Camas / Washougal | CWMW | Jul 10 | Sep 12 | 64 | 72.6°F | Jul 24 |
| Systemwide Project-Day Total | 1210 | |||||
| Systemwide Max | Jun 28 | Sep 15 | 76.2°F | Jul 28 | ||