| McNary Dam forebay on Columbia R. (MCNA) | McNary Dam tailwater on Columbia R. (MCPW) | John Day Dam forebay (JDY) | John Day Dam tailwater (JHAW) | The Dalles Dam forebay on Columbia R. (TDA) | The Dalles tailwater Downstream (TDDO) | Bonneville Dam forebay (BON) | Cascade Island (CCIW) | Warrendale (WRNO) | Camas / Washougal (CWMW) | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Date | Min | Avg | Max | >68 | Min | Avg | Max | >68 | Min | Avg | Max | >68 | Min | Avg | Max | >68 | Min | Avg | Max | >68 | Min | Avg | Max | >68 | Min | Avg | Max | >68 | Min | Avg | Max | >68 | Min | Avg | Max | >68 | Min | Avg | Max | >68 |
| Dec 1 | 46.5 | 46.9 | 47.3 | 0/24 | 46.8 | 47.0 | 47.4 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 46.3 | 46.5 | 46.8 | 0/24 | --- | --- | --- | 0/0 | 45.9 | 46.3 | 46.6 | 0/24 | --- | --- | --- | 0/0 |
| Dec 2 | 46.3 | 46.5 | 46.6 | 0/24 | 46.6 | 46.7 | 46.8 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 46.1 | 46.2 | 46.3 | 0/24 | --- | --- | --- | 0/0 | 45.8 | 46.0 | 46.1 | 0/24 | --- | --- | --- | 0/0 |
| Dec 3 | 46.0 | 46.3 | 46.5 | 0/24 | 46.1 | 46.4 | 46.6 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 46.0 | 46.2 | 46.3 | 0/24 | --- | --- | --- | 0/0 | 45.9 | 46.0 | 46.2 | 0/24 | --- | --- | --- | 0/0 |
| Dec 4 | 45.7 | 45.8 | 46.0 | 0/24 | 45.9 | 46.0 | 46.1 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 46.0 | 46.0 | 46.1 | 0/24 | --- | --- | --- | 0/0 | 45.8 | 45.9 | 46.0 | 0/24 | --- | --- | --- | 0/0 |
| Dec 5 | 45.6 | 45.8 | 46.0 | 0/24 | 45.7 | 45.9 | 46.0 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 45.8 | 45.9 | 46.0 | 0/24 | --- | --- | --- | 0/0 | 45.6 | 45.8 | 45.9 | 0/24 | --- | --- | --- | 0/0 |
| Dec 6 | 45.2 | 45.3 | 45.6 | 0/16 | 45.2 | 45.5 | 45.7 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 45.0 | 45.5 | 45.8 | 0/24 | --- | --- | --- | 0/0 | 44.8 | 45.3 | 45.7 | 0/24 | --- | --- | --- | 0/0 |
| Dec 7 | 44.4 | 44.8 | 45.1 | 0/20 | 44.4 | 44.9 | 45.2 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 44.2 | 44.6 | 45.0 | 0/24 | --- | --- | --- | 0/0 | 43.0 | 43.9 | 44.7 | 0/24 | --- | --- | --- | 0/0 |
| Dec 8 | 43.8 | 44.0 | 44.3 | 0/17 | 43.7 | 44.0 | 44.3 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 43.3 | 43.6 | 44.1 | 0/24 | --- | --- | --- | 0/0 | 42.3 | 42.9 | 43.3 | 0/24 | --- | --- | --- | 0/0 |
| Dec 9 | 43.1 | 227.9 | 3551.3 | 1/19 | 43.2 | 43.5 | 43.7 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 42.9 | 43.0 | 43.2 | 0/24 | --- | --- | --- | 0/0 | 41.9 | 42.5 | 43.0 | 0/24 | --- | --- | --- | 0/0 |
| Dec 10 | 42.6 | 42.8 | 43.1 | 0/24 | 42.8 | 43.0 | 43.2 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 42.5 | 42.7 | 42.9 | 0/24 | --- | --- | --- | 0/0 | 41.2 | 42.0 | 42.5 | 0/24 | --- | --- | --- | 0/0 |
| Dec 11 | 42.3 | 42.5 | 42.7 | 0/24 | 42.4 | 42.6 | 42.8 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 41.9 | 42.1 | 42.4 | 0/24 | --- | --- | --- | 0/0 | 40.6 | 41.5 | 42.0 | 0/24 | --- | --- | --- | 0/0 |
| Dec 12 | 41.6 | 42.0 | 42.3 | 0/24 | 41.9 | 42.2 | 42.4 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 41.6 | 41.7 | 41.9 | 0/24 | --- | --- | --- | 0/0 | 40.2 | 41.3 | 41.5 | 0/24 | --- | --- | --- | 0/0 |
| Dec 13 | 41.5 | 41.7 | 41.9 | 0/24 | 41.8 | 41.9 | 42.0 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 41.8 | 41.9 | 42.1 | 0/24 | --- | --- | --- | 0/0 | 41.5 | 41.7 | 41.9 | 0/24 | --- | --- | --- | 0/0 |
| Dec 14 | 41.5 | 41.7 | 41.9 | 0/24 | 41.6 | 41.8 | 41.8 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 41.1 | 41.6 | 42.1 | 0/24 | --- | --- | --- | 0/0 | 40.1 | 41.1 | 41.8 | 0/24 | --- | --- | --- | 0/0 |
| Dec 15 | 41.1 | 41.3 | 41.6 | 0/24 | 41.2 | 41.4 | 41.6 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 40.4 | 40.6 | 41.0 | 0/24 | --- | --- | --- | 0/0 | 39.2 | 39.9 | 40.5 | 0/24 | --- | --- | --- | 0/0 |
| Dec 16 | 40.9 | 41.0 | 41.2 | 0/24 | 41.0 | 41.1 | 41.2 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 39.9 | 40.1 | 40.3 | 0/24 | --- | --- | --- | 0/0 | 38.8 | 39.3 | 39.9 | 0/24 | 45.6 | 1245.3 | 4748.3 | 7/16 |
| Dec 17 | 40.8 | 41.0 | 41.2 | 0/24 | 41.0 | 41.1 | 41.1 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 39.7 | 39.9 | 40.0 | 0/24 | --- | --- | --- | 0/0 | 38.8 | 39.2 | 39.5 | 0/24 | --- | --- | --- | 0/0 |
| Dec 18 | 40.6 | 40.8 | 40.9 | 0/24 | 40.8 | 40.9 | 41.0 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 39.2 | 39.5 | 39.9 | 0/24 | --- | --- | --- | 0/0 | 38.1 | 38.8 | 39.4 | 0/24 | --- | --- | --- | 0/0 |
| Dec 19 | 40.2 | 40.5 | 40.8 | 0/24 | 40.4 | 40.6 | 40.7 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 38.7 | 38.9 | 39.2 | 0/24 | --- | --- | --- | 0/0 | 37.9 | 38.5 | 38.9 | 0/16 | 167.9 | 1084.3 | 4748.3 | 15/15 |
| Dec 20 | 40.2 | 40.4 | 40.5 | 0/24 | 40.3 | 40.4 | 40.4 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 38.8 | 38.8 | 38.9 | 0/24 | --- | --- | --- | 0/0 | 38.2 | 38.5 | 38.7 | 0/24 | 45.6 | 1223.2 | 4748.1 | 2/8 |
| Dec 21 | 40.2 | 40.3 | 40.4 | 0/24 | 40.2 | 40.3 | 40.4 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 39.0 | 39.0 | 39.0 | 0/24 | --- | --- | --- | 0/0 | 38.4 | 38.7 | 38.9 | 0/24 | --- | --- | --- | 0/0 |
| Dec 22 | 40.0 | 40.1 | 40.2 | 0/24 | 40.1 | 40.1 | 40.2 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 39.0 | 39.0 | 39.0 | 0/24 | --- | --- | --- | 0/0 | 38.9 | 38.9 | 39.1 | 0/24 | --- | --- | --- | 0/0 |
| Dec 23 | 40.1 | 40.3 | 40.7 | 0/24 | 40.1 | 40.3 | 40.6 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 39.0 | 39.1 | 39.3 | 0/24 | --- | --- | --- | 0/0 | 39.0 | 39.2 | 39.3 | 0/24 | --- | --- | --- | 0/0 |
| Dec 24 | 40.6 | 40.7 | 41.0 | 0/24 | 40.6 | 40.7 | 40.9 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 39.3 | 39.3 | 39.4 | 0/24 | --- | --- | --- | 0/0 | 39.2 | 39.4 | 39.7 | 0/24 | --- | --- | --- | 0/0 |
| Dec 25 | 40.9 | 41.0 | 41.2 | 0/24 | 40.8 | 41.0 | 41.1 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 39.4 | 39.4 | 39.5 | 0/24 | --- | --- | --- | 0/0 | 39.4 | 39.5 | 39.7 | 0/24 | --- | --- | --- | 0/0 |
| Dec 26 | 41.1 | 41.2 | 41.3 | 0/24 | 41.1 | 41.2 | 41.3 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 39.5 | 39.5 | 39.7 | 0/24 | --- | --- | --- | 0/0 | 39.5 | 39.6 | 40.1 | 0/24 | --- | --- | --- | 0/0 |
| Dec 27 | 41.2 | 41.4 | 41.5 | 0/24 | 41.3 | 41.5 | 41.7 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 39.6 | 39.6 | 39.7 | 0/24 | --- | --- | --- | 0/0 | 39.6 | 39.7 | 39.8 | 0/24 | --- | --- | --- | 0/0 |
| Dec 28 | 41.5 | 41.6 | 41.6 | 0/24 | 41.7 | 41.7 | 41.8 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 39.8 | 39.8 | 39.9 | 0/24 | --- | --- | --- | 0/0 | 39.8 | 39.9 | 40.0 | 0/24 | --- | --- | --- | 0/0 |
| Dec 29 | 41.6 | 41.7 | 41.8 | 0/24 | 41.8 | 41.9 | 42.0 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 39.9 | 39.9 | 40.0 | 0/24 | --- | --- | --- | 0/0 | 39.9 | 40.0 | 40.0 | 0/24 | --- | --- | --- | 0/0 |
| Dec 30 | 41.8 | 41.8 | 41.9 | 0/24 | 42.0 | 42.0 | 42.1 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 39.6 | 39.8 | 39.9 | 0/24 | --- | --- | --- | 0/0 | 39.7 | 39.8 | 39.9 | 0/24 | --- | --- | --- | 0/0 |
| Dec 31 | 41.6 | 41.7 | 41.8 | 0/24 | 41.8 | 41.9 | 42.0 | 0/24 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | --- | --- | --- | 0/0 | 39.6 | 39.8 | 39.9 | 0/24 | --- | --- | --- | 0/0 | 39.7 | 39.8 | 39.9 | 0/24 | --- | --- | --- | 0/0 |
| >68 | 0 | 1 | 1 | 1/ 720 |
0 | 0 | 0 | 0/ 744 |
0 | 0 | 0 | 0/ 0 |
0 | 0 | 0 | 0/ 0 |
0 | 0 | 0 | 0/ 0 |
0 | 0 | 0 | 0/ 0 |
0 | 0 | 0 | 0/ 744 |
0 | 0 | 0 | 0/ 0 |
0 | 0 | 0 | 0/ 736 |
1 | 3 | 3 | 24/ 39 |
Temperature in Degrees Fahrenheit
| <32 | 32 | 34 | 36 | 38 | 40 | 42 | 44 | 46 | 48 | 50 | 52 | 54 | 56 | 58 | 60 | 62 | 64 | 66 | 68 | 70 | 72 | 74 | 76 | 78 | 80 | 82 | 84 | 86 | >86 |