Daily Observations at Hyslop Exp. Stn., Corvallis
January 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.) |
| 1 | 45 | 40 | .15 | 46 | 42 | 44 | 40 | 22 | 0 | 0 | |
| 2 | 46 | 41 | .36 | 44 | 42 | 43 | 41 | 21 | 0 | 0 | |
| 3 | 45 | 33 | .03 | 51 | 39 | 47 | 42 | 26 | 0 | 0 | |
| 4 | 53 | 31 | .07 | 49 | 39 | 46 | 41 | 23 | 0 | 0 | |
| 5 | 42 | 34 | .05 | 42 | 38 | 42 | 38 | 27 | 0 | 0 | |
| 6 | 51 | 40 | .98 | 47 | 41 | 46 | 41 | 19 | 0 | 0 | |
| 7 | 58 | 49 | .60 | 53 | 46 | 50 | 45 | 11 | 0 | 4 | |
| 8 | 58 | 49 | .86 | 53 | 50 | 51 | 50 | 11 | 0 | 4 | |
| 9 | 55 | 41 | .14 | 54 | 47 | 52 | 48 | 17 | 0 | 0 | |
| 10 | 48 | 42 | T | 49 | 46 | 48 | 44 | 20 | 0 | 0 | |
| 11 | 50 | 38 | 0 | 51 | 44 | 48 | 45 | 21 | 0 | 0 | |
| 12 | 50 | 39 | .08 | 48 | 44 | 46 | 44 | 20 | 0 | 0 | |
| 13 | 51 | 29 | .02 | 52 | 38 | 49 | 41 | 25 | 0 | 0 | |
| 14 | 43 | 31 | .03 | 43 | 37 | 42 | 38 | 28 | 0 | 0 | |
| 15 | 43 | 29 | 0 | 44 | 36 | 43 | 38 | 29 | 0 | 0 | |
| 16 | 44 | 26 | 0 | 46 | 36 | 43 | 36 | 30 | 0 | 0 | |
| 17 | 39 | 33 | .09 | 39 | 36 | 39 | 37 | 29 | 0 | 0 | |
| 18 | 44 | 36 | .10 | 44 | 38 | 42 | 38 | 25 | 0 | 0 | |
| 19 | 48 | 38 | .27 | 47 | 41 | 44 | 39 | 22 | 0 | 0 | |
| 20 | 47 | 37 | .79 | 47 | 39 | 44 | 39 | 23 | 0 | 0 | |
| 21 | 47 | 34 | .87 | 44 | 40 | 42 | 39 | 24 | 0 | 0 | |
| 22 | 41 | 34 | .89 | 43 | 38 | 42 | 39 | 27 | 0 | 0 | |
| 23 | 42 | 34 | .19 | 42 | 38 | 41 | 36 | 27 | 0 | 0 | |
| 24 | 44 | 35 | .02 | 43 | 38 | 42 | 39 | 25 | 0 | 0 | |
| 25 | 47 | 41 | 1.23 | 44 | 42 | 43 | 42 | 21 | 0 | 0 | |
| 26 | 45 | 34 | .52 | 46 | 39 | 44 | 41 | 25 | 0 | 0 | |
| 27 | 44 | 32 | .50 | 41 | 36 | 40 | 38 | 27 | 0 | 0 | |
| 28 | 37 | 31 | .33 | 36 | 36 | 37 | 34 | 31 | 0 | 0 | |
| 29 | 38 | 30 | 0 | 42 | 36 | 39 | 35 | 31 | 0 | 0 | |
| 30 | 39 | 33 | 0 | 43 | 36 | 41 | 37 | 29 | 0 | 0 | |
| 31 | 44 | 35 | .01 | 43 | 36 | 42 | 36 | 25 | 0 | 0 | |
| Average/Total | 46.1 | 35.8 | 9.18 | 45.7 | 39.8 | 43.9 | 40.0 | 741 | 0 | 8 | 0.000 |
| Departure | 0.6 | 2.8 | 2.36 |   |   |   |   |   |   |   |   |