Daily Observations at Hyslop Exp. Stn., Corvallis
December 2005
Bold = new daily record set (old record, year)
| Day | Max Temp (F) | Min Temp (F) | Precip (in) | Snow (in) | 2 in soil Max | 2 in soil Min | 4 in soil Max | 4 in soil Min | Heating Deg. Days | Cooling Deg. Days | Growing Deg. Days | Evaporation (in.) |
| 1 | 45 | 32 | 0.13 | 0 | 46 | 38 | 42 | 39 | 26 | 0 | 0 | 0 |
| 2 | 47 | 36 | 0.52 | 0 | 44 | 40 | 43 | 40 | 23 | 0 | 0 | 0 |
| 3 | 45 | 34 | 0.80 | 0 | 43 | 38 | 42 | 39 | 25 | 0 | 0 | 0 |
| 4 | 47 | 32 | 0.03 | 0 | 45 | 36 | 43 | 38 | 25 | 0 | 0 | 0 |
| 5 | 39 | 30 | 0.01 | 0 | 42 | 37 | 41 | 37 | 30 | 0 | 0 | 0 |
| 6 | 39 | 32 | T | 0 | 43 | 40 | 41 | 39 | 29 | 0 | 0 | 0 |
| 7 | 37 | 32 | T | 0 | 40 | 38 | 40 | 39 | 30 | 0 | 0 | 0 |
| 8 | 40 | 32 | 0.01 | 0 | 39 | 36 | 39 | 37 | 29 | 0 | 0 | 0 |
| 9 | 43 | 27 | 0 | 0 | 41 | 35 | 39 | 36 | 30 | 0 | 0 | 0 |
| 10 | 43 | 26 | 0 | 0 | 40 | 35 | 38 | 34 | 30 | 0 | 0 | 0 |
| 11 | 45 | 24 | 0 | 0 | 40 | 35 | 38 | 34 | 30 | 0 | 0 | 0 |
| 12 | 45 | 23 | 0 | 0 | 38 | 34 | 36 | 34 | 31 | 0 | 0 | 0 |
| 13 | 35 | 23 | 0 | 0 | 35 | 35 | 35 | 35 | 36 | 0 | 0 | 0 |
| 14 | 37 | 25 | 0 | 0 | 34 | 34 | 35 | 35 | 34 | 0 | 0 | 0 |
| 15 | 40 | 19 | 0 | 0 | 41 | 34 | 39 | 34 | 35 | 0 | 0 | 0 |
| 16 | 34 | 19 | 0 | 0 | 35 | 34 | 36 | 36 | 38 | 0 | 0 | 0 |
| 17 | 37 | 18 | 0 | 0 | 33 | 33 | 34 | 34 | 37 | 0 | 0 | 0 |
| 18 | 40 | 18 | 0 | 0 | 32 | 32 | 35 | 33 | 36 | 0 | 0 | 0 |
| 19 | 35 | 28 | 0.89 | 0 | 33 | 33 | 34 | 31 | 33 | 0 | 0 | 0 |
| 20 | 40 | 32 | 0.52 | 0 | 33 | 33 | 33 | 33 | 29 | 0 | 0 | 0 |
| 21 | 44 | 33 | 0.79 | 0 | 40 | 32 | 39 | 32 | 26 | 0 | 0 | 0 |
| 22 | 54 | 40 | 1.70 | 0 | 48 | 39 | 46 | 39 | 18 | 0 | 0 | 0 |
| 23 | 57 | 42 | 0.67 | 0 | 51 | 45 | 50 | 44 | 15 | 0 | 0 | 0 |
| 24 | 53 | 43 | 0.05 | 0 | 49 | 45 | 47 | 43 | 17 | 0 | 0 | 0 |
| 25 | 60 | 43 | 0.05 | 0 | 53 | 44 | 50 | 43 | 13 | 0 | 2 | 0 |
| 26 | 56 | 46 | 0.23 | 0 | 51 | 48 | 48 | 47 | 14 | 0 | 1 | 0 |
| 27 | 55 | 44 | 0.42 | 0 | 52 | 48 | 49 | 46 | 15 | 0 | 0 | 0 |
| 28 | 55 | 46 | 1.73 | 0 | 50 | 48 | 48 | 47 | 14 | 0 | 1 | 0 |
| 29 | 53 | 38 | 0.15 | 0 | 50 | 42 | 48 | 45 | 19 | 0 | 0 | 0 |
| 30 | 50 | 38 | 2.02 | 0 | 46 | 42 | 46 | 44 | 21 | 0 | 0 | 0 |
| 31 | 55 | 45 | 1.12 | 0 | 50 | 47 | 49 | 46 | 15 | 0 | 0 | 0 |
| Average/Total | 45.3 | 32.3 | 11.84 | 0.00 | 42.5 | 38.4 | 41.4 | 38.5 | 803 | 0 | 4 | 0.000 |
| Departure | -0.3 | -1.6 | 4.12 |   |   |   |   |   |   |   |   |   |