Daily Observations at Hyslop Exp. Stn., Corvallis
December 2002
Bold = new daily record set (old record, year)
| Day | Max Temp (F) | Min Temp (F) | Precip (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.) |
| 01 | 55 | 28 | T | 49 | 35 | 46 | 37 | 23 | 0 | 0 | |
| 02 | 55 | 37 | T | 43 | 38 | 43 | 38 | 19 | 0 | 0 | |
| 3 | 52 | 35 | .01 | 51 | 43 | 48 | 42 | 21 | 0 | 0 | |
| 4 | 41 | 37 | .14 | 44 | 43 | 45 | 44 | 26 | 0 | 0 | |
| 5 | 44 | 38 | .07 | 46 | 42 | 44 | 42 | 24 | 0 | 0 | |
| 6 | 51 | 32 | T | 49 | 38 | 47 | 42 | 23 | 0 | 0 | |
| 7 | 49 | 29 | 0 | 47 | 37 | 44 | 40 | 26 | 0 | 0 | |
| 8 | 43 | 28 | 0 | 44 | 37 | 43 | 39 | 29 | 0 | 0 | |
| 9 | 37 | 30 | .03 | 42 | 38 | 41 | 38 | 31 | 0 | 0 | |
| 10 | 48 | 32 | .15 | 42 | 38 | 41 | 39 | 25 | 0 | 0 | |
| 11 | 52 | 42 | .41 | 46 | 42 | 45 | 42 | 18 | 0 | 0 | |
| 12 | 54 | 44 | .27 | 48 | 43 | 47 | 43 | 16 | 0 | 0 | |
| 13 | 59 | 41 | 1.29 | 49 | 45 | 48 | 46 | 15 | 0 | 0 | |
| 14 | 55 | 42 | .77 | 50 | 45 | 48 | 46 | 16 | 0 | 0 | |
| 15 | 59 | 43 | .34 | 53 | 47 | 50 | 48 | 14 | 0 | 1 | |
| 16 | 51 | 43 | 1.64 | 46 | 46 | 47 | 46 | 18 | 0 | 0 | |
| 17 | 48 | 36 | .58 | 49 | 42 | 48 | 45 | 23 | 0 | 0 | |
| 18 | 47 | 37 | .62 | 48 | 41 | 47 | 44 | 23 | 0 | 0 | |
| 19 | 43 | 37 | .18 | 44 | 41 | 44 | 42 | 25 | 0 | 0 | |
| 20 | 47 | 38 | .11 | 45 | 41 | 44 | 41 | 22 | 0 | 0 | |
| 21 | 46 | 39 | 1.48 | 45 | 41 | 44 | 41 | 22 | 0 | 0 | |
| 22 | 52 | 38 | .01 | 49 | 43 | 46 | 43 | 20 | 0 | 0 | |
| 23 | 52 | 37 | .26 | 46 | 42 | 44 | 42 | 20 | 0 | 0 | |
| 24 | 45 | 33 | .08 | 48 | 40 | 46 | 43 | 26 | 0 | 0 | |
| 25 | 49 | 37 | .01 | 49 | 38 | 46 | 41 | 22 | 0 | 0 | |
| 26 | 52 | 40 | .12 | 44 | 41 | 44 | 41 | 19 | 0 | 0 | |
| 27 | 54 | 40 | 1.14 | 47 | 43 | 45 | 43 | 18 | 0 | 0 | |
| 28 | 52 | 41 | .18 | 48 | 45 | 46 | 45 | 18 | 0 | 0 | |
| 29 | 45 | 34 | .52 | 46 | 40 | 45 | 43 | 25 | 0 | 0 | |
| 30 | 48 | 35 | .29 | 47 | 39 | 44 | 41 | 23 | 0 | 0 | |
| 31 | 48 | 43 | 1.81 | 46 | 45 | 45 | 44 | 19 | 0 | 0 | |
| Average/Total | 49.5 | 37.0 | 12.51 | 46.8 | 41.3 | 45.3 | 42.3 | 669 | 0 | 1 | 0.000 |
| Departure | 3.9 | 3.1 | 4.79 |   |   |   |   |   |   |   |   |