| 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 | 61.9°F | Jul 25 |
| Albeni Falls forebay | ALFI | Jul 07 | Sep 07 | 54 | 74.2°F | Aug 01 |
| Albeni Falls tailwater | ALQI | Jul 07 | Sep 07 | 54 | 74.2°F | Aug 01 |
| Chief Joseph Dam forebay | CHJ | n/a | n/a | 0 | 66.5°F | Sep 05 |
| Chief Joseph tailwater | CHQW | n/a | n/a | 0 | 66.2°F | Sep 27 |
| Anatone - Snake River Near Anatone | ANQW | Jul 04 | Sep 26 | 75 | 74.7°F | Aug 02 |
| Dworshak - N. Fork Clearwater R at Ahsahka | DWQI | n/a | n/a | 0 | n/a | n/a |
| Peck - Clearwater River at Peck | PEKI | n/a | n/a | 0 | 58.9°F | Jun 30 |
| Lewiston - Clearwater River near Lewiston | LEWI | n/a | n/a | 0 | 62.0°F | Sep 18 |
| Lower Granite Dam forebay | LWG | Sep 01 | Sep 05 | 3 | 68.4°F | Sep 05 |
| Lower Granite tailwater - Snake R. below dam | LGNW | n/a | n/a | 0 | 67.9°F | Jul 29 |
| Little Goose Dam forebay | LGSA | Jul 11 | Sep 05 | 25 | 70.3°F | Jul 29 |
| Little Goose Dam tailwater (Snake R. below Little Goose) | LGSW | Jul 25 | Sep 05 | 19 | 70.4°F | Jul 29 |
| Lower Monumental Dam forebay on Snake River | LMNA | Jul 13 | Sep 07 | 36 | 70.9°F | Jul 29 |
| Lower Monumental tailwater below the dam on Snake River | LMNW | Jul 11 | Aug 23 | 32 | 70.9°F | Aug 01 |
| Ice Harbor Dam forebay | IHRA | Jul 13 | Sep 19 | 62 | 71.9°F | Aug 05 |
| Ice Harbor tailwater- Snake R. below Goose Is. | IDSW | Jul 12 | Sep 18 | 62 | 72.3°F | Aug 05 |
| McNary Dam forebay on Columbia R. | MCNA | Jul 20 | Sep 22 | 60 | 72.0°F | Jul 30 |
| McNary Dam tailwater on Columbia R. | MCPW | Jul 18 | Sep 23 | 66 | 72.3°F | Aug 01 |
| John Day Dam forebay | JDY | Jul 17 | Sep 15 | 60 | 74.8°F | Jul 29 |
| John Day Dam tailwater | JHAW | Jul 19 | Sep 26 | 70 | 73.8°F | Aug 05 |
| The Dalles Dam forebay on Columbia R. | TDA | Jul 17 | Sep 17 | 63 | 73.7°F | Jul 31 |
| The Dalles tailwater Downstream | TDDO | Jul 16 | Sep 25 | 69 | 73.9°F | Jul 31 |
| Bonneville Dam forebay | BON | Jul 17 | Sep 16 | 62 | 74.3°F | Aug 02 |
| Cascade Island | CCIW | Jul 17 | Sep 19 | 65 | 74.2°F | Aug 02 |
| Warrendale | WRNO | Sep 16 | Sep 19 | 4 | 69.6°F | Sep 16 |
| Camas / Washougal | CWMW | Jul 17 | Sep 19 | 65 | 74.7°F | Aug 03 |
| Systemwide Total | Jul 04 | Sep 26 | 1006 | 74.8°F | Jul 29 | |