| 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 | 63.6°F | Aug 05 |
| Albeni Falls forebay | ALFI | Jul 03 | Sep 13 | 73 | 75.7°F | Aug 08 |
| Albeni Falls tailwater | ALQI | Jul 03 | Sep 13 | 73 | 75.8°F | Aug 08 |
| Chief Joseph Dam forebay | CHJ | n/a | n/a | 0 | 67.6°F | Sep 02 |
| Chief Joseph tailwater | CHQW | n/a | n/a | 0 | 67.0°F | Sep 02 |
| Anatone - Snake River Near Anatone | ANQW | Jul 05 | Sep 13 | 71 | 74.8°F | Aug 04 |
| Dworshak - N. Fork Clearwater R at Ahsahka | DWQI | n/a | n/a | 0 | 51.4°F | Oct 17 |
| Peck - Clearwater River at Peck | PEKI | n/a | n/a | 0 | 59.2°F | Jun 28 |
| Lewiston - Clearwater River near Lewiston | LEWI | n/a | n/a | 0 | 60.7°F | Jun 29 |
| Lower Granite Dam forebay | LWG | Jul 11 | Sep 12 | 32 | 69.7°F | Sep 06 |
| Lower Granite tailwater - Snake R. below dam | LGNW | Jul 10 | Aug 11 | 30 | 69.6°F | Aug 07 |
| Little Goose Dam forebay | LGSA | Jul 09 | Sep 13 | 63 | 71.1°F | Aug 15 |
| Little Goose Dam tailwater (Snake R. below Little Goose) | LGSW | Jul 09 | Sep 16 | 64 | 71.1°F | Aug 12 |
| Lower Monumental Dam forebay on Snake River | LMNA | Jul 11 | Sep 13 | 65 | 71.4°F | Aug 15 |
| Lower Monumental tailwater below the dam on Snake River | LMNW | Jul 08 | Sep 16 | 71 | 71.4°F | Aug 11 |
| Ice Harbor Dam forebay | IHRA | Jul 09 | Sep 14 | 68 | 72.5°F | Aug 15 |
| Ice Harbor tailwater- Snake R. below Goose Is. | IDSW | Jul 08 | Sep 17 | 72 | 72.7°F | Aug 11 |
| Pasco - Columbia Rivers | PAQW | Jul 28 | Sep 14 | 49 | 70.2°F | Aug 30 |
| McNary Dam forebay on Columbia R. | MCNA | Jul 12 | Sep 15 | 66 | 71.7°F | Aug 11 |
| McNary Dam tailwater on Columbia R. | MCPW | Jul 13 | Sep 17 | 62 | 71.9°F | Aug 11 |
| John Day Dam forebay | JDY | Jul 09 | Sep 21 | 75 | 74.1°F | Aug 10 |
| John Day Dam tailwater | JHAW | Jul 09 | Sep 20 | 74 | 73.7°F | Aug 10 |
| The Dalles Dam forebay on Columbia R. | TDA | Jul 09 | Sep 19 | 73 | 73.8°F | Aug 11 |
| The Dalles tailwater Downstream | TDDO | Jul 09 | Sep 19 | 73 | 73.8°F | Aug 11 |
| Bonneville Dam forebay | BON | Jul 12 | Sep 18 | 69 | 73.5°F | Aug 11 |
| Cascade Island | CCIW | Jul 12 | Sep 18 | 69 | 73.5°F | Aug 11 |
| Warrendale | WRNO | Jul 12 | Sep 17 | 68 | 73.6°F | Aug 11 |
| Camas / Washougal | CWMW | Jul 08 | Sep 16 | 71 | 74.0°F | Aug 11 |
| Systemwide Project-Day Total | 1431 | |||||
| Systemwide Max | Jul 03 | Sep 21 | 75.8°F | Aug 08 | ||