| 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 | 58.4°F | Aug 20 |
| Albeni Falls forebay | ALFI | Jun 28 | Aug 31 | 65 | 76.7°F | Aug 05 |
| Albeni Falls tailwater | ALQI | Jun 28 | Aug 31 | 65 | 76.6°F | Aug 05 |
| Chief Joseph Dam forebay | CHJ | n/a | n/a | 0 | 67.7°F | Aug 16 |
| Chief Joseph tailwater | CHQW | n/a | n/a | 0 | 67.3°F | Aug 15 |
| Anatone - Snake River Near Anatone | ANQW | Mar 04 | Sep 16 | 88 | 432.9°F | Mar 04 |
| Dworshak - N. Fork Clearwater R at Ahsahka | DWQI | n/a | n/a | 0 | 49.7°F | Nov 04 |
| Peck - Clearwater River at Peck | PEKI | Jun 08 | Jul 22 | 3 | 71.3°F | Jun 08 |
| Lewiston - Clearwater River near Lewiston | LEWI | n/a | n/a | 0 | 64.1°F | Jun 22 |
| Lower Granite Dam forebay | LWG | Jul 10 | Aug 19 | 23 | 71.3°F | Aug 04 |
| Lower Granite tailwater - Snake R. below dam | LGNW | Jul 11 | Aug 16 | 19 | 70.7°F | Aug 04 |
| Little Goose Dam forebay | LGSA | Jun 27 | Aug 29 | 60 | 71.8°F | Aug 10 |
| Little Goose Dam tailwater (Snake R. below Little Goose) | LGSW | Jun 27 | Aug 29 | 60 | 71.7°F | Aug 10 |
| Lower Monumental Dam forebay on Snake River | LMNA | Jun 28 | Sep 02 | 67 | 72.1°F | Aug 19 |
| Lower Monumental tailwater below the dam on Snake River | LMNW | Jun 29 | Sep 03 | 67 | 72.0°F | Aug 14 |
| Ice Harbor Dam forebay | IHRA | Jul 01 | Sep 01 | 63 | 72.7°F | Aug 19 |
| Ice Harbor tailwater- Snake R. below Goose Is. | IDSW | Jun 30 | Sep 15 | 78 | 72.8°F | Jul 18 |
| Pasco - Columbia Rivers | PAQW | Mar 29 | Aug 31 | 41 | 156.5°F | Mar 29 |
| McNary Dam forebay on Columbia R. | MCNA | Jun 30 | Sep 01 | 59 | 72.0°F | Aug 02 |
| McNary Dam tailwater on Columbia R. | MCPW | Jun 30 | Sep 18 | 78 | 72.1°F | Aug 03 |
| John Day Dam forebay | JDY | Jun 28 | Sep 19 | 84 | 73.9°F | Aug 13 |
| John Day Dam tailwater | JHAW | Jun 28 | Sep 19 | 84 | 73.5°F | Aug 13 |
| The Dalles Dam forebay on Columbia R. | TDA | Jun 28 | Sep 16 | 80 | 73.6°F | Aug 12 |
| The Dalles tailwater Downstream | TDDO | Jun 28 | Sep 16 | 80 | 73.7°F | Aug 14 |
| Bonneville Dam forebay | BON | Jun 28 | Sep 13 | 78 | 73.9°F | Aug 14 |
| Cascade Island | CCIW | Jun 28 | Sep 01 | 66 | 74.0°F | Aug 14 |
| Warrendale | WRNO | Jun 28 | Sep 12 | 74 | 74.2°F | Aug 15 |
| Camas / Washougal | CWMW | n/a | n/a | 0 | n/a | n/a |
| Systemwide Project-Day Total | 1382 | |||||
| Systemwide Max | Mar 04 | Sep 19 | 432.9°F | Mar 04 | ||