| 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 | Jul 30 |
| Albeni Falls forebay | ALFI | Jun 09 | Sep 06 | 78 | 75.1°F | Aug 16 |
| Albeni Falls tailwater | ALQI | Jun 09 | Sep 06 | 78 | 75.1°F | Aug 16 |
| Chief Joseph Dam forebay | CHJ | n/a | n/a | 0 | 67.2°F | Aug 18 |
| Chief Joseph tailwater | CHQW | n/a | n/a | 0 | 67.1°F | Aug 18 |
| Anatone - Snake River Near Anatone | ANQW | Jul 01 | Sep 20 | 82 | 75.7°F | Aug 17 |
| Dworshak - N. Fork Clearwater R at Ahsahka | DWQI | Mar 22 | Mar 22 | 1 | 337.8°F | Mar 22 |
| Peck - Clearwater River at Peck | PEKI | n/a | n/a | 0 | 65.0°F | Jun 29 |
| Lewiston - Clearwater River near Lewiston | LEWI | Mar 27 | Apr 03 | 7 | 2391.3°F | Mar 30 |
| Lower Granite Dam forebay | LWG | Jul 05 | Aug 26 | 11 | 69.5°F | Aug 22 |
| Lower Granite tailwater - Snake R. below dam | LGNW | Jul 05 | Aug 22 | 13 | 69.0°F | Aug 09 |
| Little Goose Dam forebay | LGSA | Jul 06 | Sep 02 | 56 | 70.8°F | Jul 27 |
| Little Goose Dam tailwater (Snake R. below Little Goose) | LGSW | Jul 07 | Sep 02 | 52 | 70.2°F | Jul 27 |
| Lower Monumental Dam forebay on Snake River | LMNA | Jul 09 | Sep 06 | 58 | 71.6°F | Aug 20 |
| Lower Monumental tailwater below the dam on Snake River | LMNW | Jul 08 | Sep 10 | 61 | 71.1°F | Aug 20 |
| Ice Harbor Dam forebay | IHRA | Jul 09 | Sep 07 | 61 | 72.0°F | Aug 06 |
| Ice Harbor tailwater- Snake R. below Goose Is. | IDSW | Jul 09 | Sep 20 | 74 | 72.3°F | Aug 06 |
| Pasco - Columbia Rivers | PAQW | Jul 10 | Sep 08 | 50 | 71.1°F | Aug 16 |
| McNary Dam forebay on Columbia R. | MCNA | Jul 04 | Sep 11 | 65 | 72.2°F | Aug 19 |
| McNary Dam tailwater on Columbia R. | MCPW | Jul 04 | Sep 22 | 81 | 72.3°F | Aug 19 |
| John Day Dam forebay | JDY | Jul 04 | Sep 18 | 77 | 73.0°F | Aug 21 |
| John Day Dam tailwater | JHAW | Jul 04 | Sep 24 | 83 | 72.7°F | Aug 21 |
| The Dalles Dam forebay on Columbia R. | TDA | Jul 04 | Sep 19 | 78 | 72.9°F | Aug 16 |
| The Dalles tailwater Downstream | TDDO | Jul 04 | Sep 19 | 68 | 73.0°F | Aug 16 |
| Bonneville Dam forebay | BON | Jul 05 | Sep 18 | 76 | 73.2°F | Aug 17 |
| Cascade Island | CCIW | Jul 05 | Sep 01 | 59 | 73.3°F | Aug 17 |
| Warrendale | WRNO | Jul 05 | Sep 18 | 76 | 73.3°F | Aug 17 |
| Camas / Washougal | CWMW | n/a | n/a | 0 | n/a | n/a |
| Systemwide Project-Day Total | 1345 | |||||
| Systemwide Max | Mar 22 | Sep 24 | 2391.3°F | Mar 30 | ||