Daily Observations at Hyslop Exp. Stn., Corvallis
January 2001
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 | 57 | 38 | T | 54 | 43 | 49 | 44 | 17 | 0 | 0 | |
| 2 | 43 | 37 | 0 | 47 | 43 | 46 | 45 | 25 | 0 | 0 | |
| 3 | 45 | 30 | 0 | 47 | 39 | 46 | 40 | 27 | 0 | 0 | |
| 4 | 45 | 32 | 0 | 41 | 39 | 41 | 39 | 26 | 0 | 0 | |
| 5 | 61 | 40 | .02 | 51 | 38 | 47 | 38 | 14 | 0 | 1 | |
| 6 | 60 | 37 | 0 | 56 | 41 | 51 | 43 | 16 | 0 | 0 | |
| 7 | 45 | 32 | T | 46 | 44 | 43 | 39 | 26 | 0 | 0 | |
| 8 | 47 | 32 | .12 | 44 | 39 | 43 | 36 | 25 | 0 | 0 | |
| 9 | 50 | 30 | .02 | 47 | 38 | 45 | 40 | 25 | 0 | 0 | |
| 10 | 46 | 30 | .21 | 41 | 37 | 40 | 39 | 27 | 0 | 0 | |
| 11 | 39 | 33 | .02 | 43 | 36 | 42 | 38 | 29 | 0 | 0 | |
| 12 | 52 | 38 | 0 | 48 | 38 | 46 | 38 | 20 | 0 | 0 | |
| 13 | 52 | 39 | .10 | 50 | 42 | 47 | 43 | 19 | 0 | 0 | |
| 14 | 46 | 39 | .21 | 45 | 42 | 44 | 42 | 22 | 0 | 0 | |
| 15 | 49 | 34 | .05 | 50 | 41 | 47 | 40 | 23 | 0 | 0 | |
| 16 | 43 | 24 | .01 | 47 | 36 | 44 | 34 | 31 | 0 | 0 | |
| 17 | 40 | 23 | .01 | 42 | 36 | 41 | 37 | 33 | 0 | 0 | |
| 18 | 39 | 25 | .01 | 38 | 36 | 38 | 36 | 33 | 0 | 0 | |
| 19 | 45 | 34 | .04 | 43 | 36 | 41 | 37 | 25 | 0 | 0 | |
| 20 | 53 | 31 | .01 | 50 | 38 | 46 | 40 | 23 | 0 | 0 | |
| 21 | 43 | 32 | .15 | 44 | 38 | 41 | 38 | 27 | 0 | 0 | |
| 22 | 51 | 39 | .03 | 47 | 41 | 44 | 40 | 20 | 0 | 0 | |
| 23 | 52 | 40 | 0 | 52 | 41 | 48 | 43 | 19 | 0 | 0 | |
| 24 | 47 | 39 | .31 | 44 | 40 | 43 | 42 | 22 | 0 | 0 | |
| 25 | 46 | 31 | .04 | 46 | 39 | 44 | 40 | 26 | 0 | 0 | |
| 26 | 44 | 34 | .07 | 44 | 36 | 43 | 37 | 26 | 0 | 0 | |
| 27 | 53 | 29 | 0 | 49 | 36 | 45 | 38 | 24 | 0 | 0 | |
| 28 | 49 | 24 | 0 | 47 | 35 | 44 | 36 | 28 | 0 | 0 | |
| 29 | 49 | 25 | .10 | 42 | 35 | 41 | 36 | 28 | 0 | 0 | |
| 30 | 46 | 35 | .06 | 48 | 39 | 44 | 40 | 24 | 0 | 0 | |
| 31 | 48 | 25 | .01 | 47 | 36 | 44 | 38 | 28 | 0 | 0 | |
| Average/Total | 47.9 | 32.6 | 1.60 | 46.5 | 38.6 | 44.1 | 39.2 | 758 | 0 | 1 | 0.000 |
| Departure | 2.4 | -0.4 | -5.22 |   |   |   |   |   |   |   |   |