| 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 | 57.4°F | Jul 17 |
| Albeni Falls forebay | ALFI | Jun 15 | Sep 23 | 82 | 73.5°F | Aug 04 |
| Albeni Falls tailwater | ALQI | n/a | n/a | 0 | 55.5°F | May 13 |
| Chief Joseph Dam forebay | CHJ | Aug 25 | Aug 25 | 1 | 68.1°F | Aug 25 |
| Chief Joseph tailwater | CHQW | Sep 07 | Sep 07 | 1 | 68.1°F | Sep 07 |
| Anatone - Snake River Near Anatone | ANQW | Jun 30 | Sep 17 | 80 | 75.2°F | Aug 13 |
| Dworshak - N. Fork Clearwater R at Ahsahka | DWQI | n/a | n/a | 0 | 51.1°F | Oct 14 |
| Peck - Clearwater River at Peck | PEKI | n/a | n/a | 0 | 58.2°F | Jun 20 |
| Lewiston - Clearwater River near Lewiston | LEWI | Feb 12 | Feb 13 | 2 | 2391.4°F | Feb 13 |
| Lower Granite Dam forebay | LWG | Jul 28 | Sep 24 | 44 | 71.1°F | Sep 07 |
| Lower Granite tailwater - Snake R. below dam | LGNW | Jul 17 | Sep 27 | 24 | 69.4°F | Aug 02 |
| Little Goose Dam forebay | LGSA | Jul 11 | Sep 27 | 78 | 71.0°F | Jul 16 |
| Little Goose Dam tailwater (Snake R. below Little Goose) | LGSW | Jul 12 | Sep 27 | 76 | 70.6°F | Aug 09 |
| Lower Monumental Dam forebay on Snake River | LMNA | Jul 11 | Sep 27 | 78 | 71.0°F | Aug 13 |
| Lower Monumental tailwater below the dam on Snake River | LMNW | Jul 11 | Sep 26 | 78 | 71.1°F | Aug 13 |
| Ice Harbor Dam forebay | IHRA | Jul 04 | Sep 29 | 86 | 72.5°F | Aug 17 |
| Ice Harbor tailwater- Snake R. below Goose Is. | IDSW | Jul 04 | Oct 01 | 90 | 72.7°F | Aug 18 |
| Pasco - Columbia Rivers | PAQW | Jul 12 | Sep 25 | 73 | 71.9°F | Sep 04 |
| McNary Dam forebay on Columbia R. | MCNA | Jul 10 | Sep 29 | 82 | 72.7°F | Sep 06 |
| McNary Dam tailwater on Columbia R. | MCPW | Jul 10 | Sep 30 | 83 | 72.8°F | Sep 06 |
| John Day Dam forebay | JDY | Jul 07 | Sep 23 | 79 | 73.7°F | Sep 06 |
| John Day Dam tailwater | JHAW | Jul 07 | Oct 05 | 91 | 73.6°F | Sep 09 |
| The Dalles Dam forebay on Columbia R. | TDA | Jul 08 | Sep 24 | 79 | 73.4°F | Sep 04 |
| The Dalles tailwater Downstream | TDDO | Jul 07 | Oct 03 | 89 | 73.6°F | Sep 04 |
| Bonneville Dam forebay | BON | Jul 09 | Sep 24 | 78 | 73.4°F | Aug 29 |
| Cascade Island | CCIW | Jul 09 | Sep 04 | 58 | 73.4°F | Aug 29 |
| Warrendale | WRNO | Jul 09 | Sep 27 | 81 | 73.3°F | Aug 29 |
| Camas / Washougal | CWMW | n/a | n/a | 0 | n/a | n/a |
| Systemwide Project-Day Total | 1513 | |||||
| Systemwide Max | Feb 12 | Oct 05 | 2391.4°F | Feb 13 | ||