| 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 | 62.0°F | Aug 21 |
| Albeni Falls forebay | ALFI | Jul 16 | Sep 14 | 61 | 76.3°F | Aug 01 |
| Albeni Falls tailwater | ALQI | Jul 15 | Sep 14 | 62 | 76.3°F | Aug 01 |
| Chief Joseph Dam forebay | CHJ | n/a | n/a | 0 | 67.1°F | Sep 04 |
| Chief Joseph tailwater | CHQW | n/a | n/a | 0 | 66.7°F | Sep 04 |
| Anatone - Snake River Near Anatone | ANQW | Jul 12 | Sep 18 | 68 | 74.9°F | Aug 26 |
| Dworshak - N. Fork Clearwater R at Ahsahka | DWQI | n/a | n/a | 0 | 65.3°F | May 25 |
| Peck - Clearwater River at Peck | PEKI | Jun 14 | Jul 17 | 3 | 109.2°F | Jun 14 |
| Lewiston - Clearwater River near Lewiston | LEWI | Dec 22 | Dec 23 | 2 | 4160.6°F | Dec 23 |
| Lower Granite Dam forebay | LWG | Aug 26 | Sep 06 | 10 | 69.7°F | Aug 31 |
| Lower Granite tailwater - Snake R. below dam | LGNW | n/a | n/a | 0 | 68.0°F | Aug 09 |
| Little Goose Dam forebay | LGSA | Jul 19 | Sep 02 | 37 | 70.0°F | Aug 15 |
| Little Goose Dam tailwater (Snake R. below Little Goose) | LGSW | Jul 20 | Sep 11 | 43 | 69.6°F | Aug 15 |
| Lower Monumental Dam forebay on Snake River | LMNA | Jul 19 | Sep 01 | 42 | 70.7°F | Aug 15 |
| Lower Monumental tailwater below the dam on Snake River | LMNW | Jul 19 | Sep 13 | 56 | 70.7°F | Aug 18 |
| Ice Harbor Dam forebay | IHRA | Jul 19 | Sep 01 | 45 | 71.6°F | Aug 23 |
| Ice Harbor tailwater- Snake R. below Goose Is. | IDSW | Jul 18 | Sep 21 | 66 | 72.2°F | Aug 23 |
| Pasco - Columbia Rivers | PAQW | Jul 29 | Sep 08 | 31 | 70.4°F | Aug 26 |
| McNary Dam forebay on Columbia R. | MCNA | Jul 25 | Sep 06 | 44 | 71.5°F | Aug 26 |
| McNary Dam tailwater on Columbia R. | MCPW | Jul 25 | Sep 18 | 56 | 71.6°F | Aug 26 |
| John Day Dam forebay | JDY | Jun 29 | Sep 13 | 53 | 166.6°F | Jun 29 |
| John Day Dam tailwater | JHAW | Jul 24 | Sep 23 | 62 | 72.0°F | Aug 31 |
| The Dalles Dam forebay on Columbia R. | TDA | Jul 25 | Sep 13 | 51 | 72.0°F | Sep 01 |
| The Dalles tailwater Downstream | TDDO | Jul 24 | Sep 23 | 62 | 72.2°F | Sep 01 |
| Bonneville Dam forebay | BON | Jul 06 | Sep 14 | 53 | 163.1°F | Jul 06 |
| Cascade Island | CCIW | Jun 07 | Sep 01 | 42 | 2391.3°F | Jun 08 |
| Warrendale | WRNO | Jul 11 | Nov 04 | 65 | 2099.8°F | Nov 03 |
| Camas / Washougal | CWMW | n/a | n/a | 0 | n/a | n/a |
| Systemwide Project-Day Total | 1014 | |||||
| Systemwide Max | Jun 07 | Dec 23 | 4160.6°F | Dec 23 | ||