Daily Observations at Hyslop Exp. Stn., Corvallis
March 2004
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 | 48 | 40 | .35 | 49 | 44 | 46 | 42 | 21 | 0 | 0 | |
| 2 | 57 | 31 | T | 60 | 41 | 56 | 45 | 21 | 0 | 0 | |
| 3 | 56 | 33 | .02 | 61 | 41 | 56 | 43 | 20 | 0 | 0 | |
| 4 | 48 | 39 | .21 | 48 | 43 | 47 | 44 | 21 | 0 | 0 | |
| 5 | 53 | 40 | .13 | 53 | 45 | 49 | 46 | 18 | 0 | 0 | |
| 6 | 52 | 35 | .11 | 52 | 43 | 48 | 44 | 21 | 0 | 0 | .000 |
| 7 | 54 | 40 | T | 56 | 42 | 53 | 43 | 18 | 0 | 0 | |
| 8 | 70 | 42 | .02 | 69 | 49 | 62 | 48 | 9 | 0 | 6 | |
| 9 | 68 | 44 | T | 68 | 48 | 62 | 50 | 9 | 0 | 6 | |
| 10 | 67 | 37 | 0 | 67 | 44 | 60 | 48 | 13 | 0 | 2 | |
| 11 | 59 | 36 | 0 | 64 | 42 | 59 | 45 | 17 | 0 | 0 | |
| 12 | 65 | 34 | 0 | 65 | 44 | 60 | 46 | 15 | 0 | 0 | |
| 13 | 64 | 37 | 0 | 70 | 44 | 62 | 45 | 14 | 0 | 1 | |
| 14 | 60 | 43 | 0 | 65 | 45 | 59 | 47 | 13 | 0 | 2 | |
| 15 | 65 | 39 | 0 | 69 | 49 | 64 | 50 | 13 | 0 | 2 | |
| 16 | 67 | 31 | 0 | 70 | 45 | 63 | 48 | 16 | 0 | 0 | |
| 17 | 70 | 37 | 0 | 69 | 44 | 63 | 45 | 11 | 0 | 4 | |
| 18 | 64 | 44 | 0 | 69 | 47 | 62 | 47 | 11 | 0 | 4 | |
| 19 | 53 | 38 | .02 | 61 | 46 | 56 | 49 | 19 | 0 | 0 | |
| 20 | 56 | 35 | 0 | 65 | 44 | 59 | 47 | 19 | 0 | 0 | |
| 21 | 65 | 37 | 0 | 64 | 43 | 58 | 44 | 14 | 0 | 1 | |
| 22 | 70 | 39 | 0 | 68 | 45 | 62 | 47 | 10 | 0 | 5 | |
| 23 | 70 | 37 | 0 | 74 | 48 | 67 | 49 | 11 | 0 | 4 | |
| 24 | 64 | 45 | .16 | 68 | 48 | 62 | 45 | 10 | 0 | 5 | |
| 25 | 58 | 40 | .05 | 63 | 51 | 59 | 52 | 16 | 0 | 0 | |
| 26 | 52 | 40 | .43 | 54 | 47 | 53 | 48 | 19 | 0 | 0 | |
| 27 | 49 | 41 | .28 | 53 | 45 | 51 | 47 | 20 | 0 | 0 | |
| 28 | 59 | 35 | .01 | 66 | 45 | 60 | 46 | 18 | 0 | 0 | |
| 29 | 64 | 36 | .01 | 68 | 44 | 61 | 45 | 15 | 0 | 0 | |
| 30 | 75 | 43 | .09 | 74 | 48 | 67 | 48 | 6 | 0 | 9 | |
| 31 | 56 | 29 | .03 | 64 | 45 | 60 | 48 | 22 | 0 | 0 | |
| Average/Total | 60.6 | 38.0 | 1.92 | 63.4 | 45.1 | 58.3 | 46.5 | 480 | 0 | 51 | 0.000 |
| Departure | 5.7 | 1.0 | -2.63 |   |   |   |   |   |   |   |   |