| 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 | 60.4°F | Sep 07 |
| Albeni Falls forebay | ALFI | Jul 20 | Sep 11 | 54 | 74.6°F | Aug 05 |
| Albeni Falls tailwater | ALQI | Jul 20 | Sep 11 | 54 | 74.7°F | Aug 05 |
| Chief Joseph Dam forebay | CHJ | n/a | n/a | 0 | 66.1°F | Sep 19 |
| Chief Joseph tailwater | CHQW | n/a | n/a | 0 | 65.8°F | Sep 19 |
| Anatone - Snake River Near Anatone | ANQW | Mar 27 | Sep 13 | 61 | 827.1°F | Apr 03 |
| Dworshak - N. Fork Clearwater R at Ahsahka | DWQI | n/a | n/a | 0 | 50.5°F | Oct 30 |
| Peck - Clearwater River at Peck | PEKI | n/a | n/a | 0 | 58.8°F | Jul 07 |
| Lewiston - Clearwater River near Lewiston | LEWI | n/a | n/a | 0 | 60.3°F | Jul 07 |
| Lower Granite Dam forebay | LWG | Aug 24 | Sep 09 | 3 | 68.5°F | Aug 25 |
| Lower Granite tailwater - Snake R. below dam | LGNW | n/a | n/a | 0 | 67.8°F | Aug 11 |
| Little Goose Dam forebay | LGSA | Jul 24 | Sep 06 | 38 | 71.4°F | Jul 30 |
| Little Goose Dam tailwater (Snake R. below Little Goose) | LGSW | Jul 25 | Sep 04 | 27 | 69.6°F | Jul 30 |
| Lower Monumental Dam forebay on Snake River | LMNA | Jul 26 | Sep 08 | 45 | 70.6°F | Aug 02 |
| Lower Monumental tailwater below the dam on Snake River | LMNW | Jul 23 | Sep 10 | 50 | 70.2°F | Aug 02 |
| Ice Harbor Dam forebay | IHRA | Jul 22 | Sep 09 | 50 | 71.3°F | Aug 07 |
| Ice Harbor tailwater- Snake R. below Goose Is. | IDSW | Jul 20 | Sep 11 | 54 | 71.3°F | Aug 03 |
| Pasco - Columbia Rivers | PAQW | Aug 18 | Sep 07 | 16 | 68.8°F | Sep 06 |
| McNary Dam forebay on Columbia R. | MCNA | Jul 26 | Sep 10 | 45 | 69.9°F | Aug 21 |
| McNary Dam tailwater on Columbia R. | MCPW | Jul 25 | Sep 11 | 49 | 69.9°F | Aug 23 |
| John Day Dam forebay | JDY | Jul 24 | Sep 15 | 54 | 71.2°F | Aug 05 |
| John Day Dam tailwater | JHAW | Jul 24 | Sep 15 | 54 | 71.1°F | Aug 05 |
| The Dalles Dam forebay on Columbia R. | TDA | Jul 21 | Sep 14 | 53 | 71.2°F | Aug 05 |
| The Dalles tailwater Downstream | TDDO | Jul 21 | Sep 14 | 53 | 71.3°F | Aug 05 |
| Bonneville Dam forebay | BON | Jul 21 | Sep 11 | 48 | 71.1°F | Aug 18 |
| Cascade Island | CCIW | Jul 21 | Sep 02 | 41 | 71.1°F | Aug 19 |
| Warrendale | WRNO | Jul 21 | Sep 07 | 46 | 71.2°F | Aug 19 |
| Camas / Washougal | CWMW | Jul 19 | Sep 07 | 50 | 71.6°F | Aug 19 |
| Systemwide Project-Day Total | 945 | |||||
| Systemwide Max | Mar 27 | Sep 15 | 827.1°F | Apr 03 | ||