| 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 | 56.7°F | Jul 15 |
| Albeni Falls forebay | ALFI | Jul 17 | Sep 02 | 48 | 74.6°F | Aug 06 |
| Albeni Falls tailwater | ALQI | Jul 10 | Sep 02 | 49 | 74.7°F | Aug 05 |
| Chief Joseph Dam forebay | CHJ | n/a | n/a | 0 | 67.2°F | Aug 29 |
| Chief Joseph tailwater | CHQW | n/a | n/a | 0 | 66.9°F | Aug 29 |
| Anatone - Snake River Near Anatone | ANQW | Jul 07 | Sep 25 | 71 | 73.5°F | Aug 19 |
| Dworshak - N. Fork Clearwater R at Ahsahka | DWQI | n/a | n/a | 0 | 51.3°F | Nov 12 |
| Peck - Clearwater River at Peck | PEKI | n/a | n/a | 0 | 53.4°F | Oct 10 |
| Lewiston - Clearwater River near Lewiston | LEWI | n/a | n/a | 0 | 58.8°F | Sep 24 |
| Lower Granite Dam forebay | LWG | Aug 22 | Aug 27 | 5 | 69.5°F | Aug 24 |
| Lower Granite tailwater - Snake R. below dam | LGNW | Aug 11 | Aug 25 | 3 | 68.6°F | Aug 24 |
| Little Goose Dam forebay | LGSA | Jul 18 | Sep 05 | 46 | 69.9°F | Aug 10 |
| Little Goose Dam tailwater (Snake R. below Little Goose) | LGSW | Jul 19 | Sep 03 | 43 | 69.3°F | Aug 10 |
| Lower Monumental Dam forebay on Snake River | LMNA | Jul 18 | Sep 08 | 53 | 70.0°F | Aug 22 |
| Lower Monumental tailwater below the dam on Snake River | LMNW | Jul 16 | Sep 08 | 55 | 70.0°F | Aug 14 |
| Ice Harbor Dam forebay | IHRA | Jul 17 | Sep 13 | 59 | 71.6°F | Aug 23 |
| Ice Harbor tailwater- Snake R. below Goose Is. | IDSW | Jul 16 | Sep 13 | 60 | 71.7°F | Aug 23 |
| Pasco - Columbia Rivers | PAQW | Jul 31 | Sep 09 | 34 | 70.3°F | Aug 18 |
| McNary Dam forebay on Columbia R. | MCNA | Jul 22 | Sep 12 | 45 | 71.8°F | Aug 19 |
| McNary Dam tailwater on Columbia R. | MCPW | Jul 21 | Sep 10 | 43 | 71.6°F | Aug 19 |
| John Day Dam forebay | JDY | Jul 12 | Sep 15 | 66 | 72.8°F | Aug 11 |
| John Day Dam tailwater | JHAW | Jul 12 | Sep 16 | 67 | 72.5°F | Aug 11 |
| The Dalles Dam forebay on Columbia R. | TDA | Jul 13 | Sep 16 | 64 | 72.7°F | Aug 19 |
| The Dalles tailwater Downstream | TDDO | Jul 12 | Sep 17 | 68 | 72.8°F | Aug 18 |
| Bonneville Dam forebay | BON | Jul 13 | Sep 11 | 61 | 72.9°F | Aug 19 |
| Cascade Island | CCIW | Jul 12 | Sep 11 | 62 | 72.9°F | Aug 19 |
| Warrendale | WRNO | Jul 12 | Sep 10 | 61 | 72.9°F | Aug 19 |
| Camas / Washougal | CWMW | Jul 11 | Sep 10 | 47 | 73.4°F | Aug 19 |
| Systemwide Project-Day Total | 1110 | |||||
| Systemwide Max | Jul 07 | Sep 25 | 74.7°F | Aug 05 | ||