Daily Observations at Hyslop Exp. Stn., Corvallis
April 2008
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 | 50 | 29 | T | 0 | 60 | 37 | 52 | 39 | 25 | 0 | 0 | .099 |
| 2 | 52 | 30 | 0 | 0 | 60 | 37 | 54 | 39 | 24 | 0 | 0 | .037 |
| 3 | 57 | 29 | 0 | 0 | 62 | 37 | 55 | 39 | 22 | 0 | 0 | .111 |
| 4 | 64 | 31 | T | 0 | 67 | 37 | 59 | 41 | 17 | 0 | 0 | .268 |
| 5 | 51 | 38 | .15 | 0 | 57 | 46 | 52 | 46 | 20 | 0 | 0 | .010 |
| 6 | 48 | 41 | .21 | 0 | 53 | 45 | 50 | 44 | 20 | 0 | 0 | .004 |
| 7 | 54 | 38 | .12 | 0 | 59 | 44 | 54 | 44 | 19 | 0 | 0 | .090 |
| 8 | 51 | 38 | .12 | 0 | 58 | 44 | 53 | 44 | 20 | 0 | 0 | .076 |
| 9 | 53 | 39 | .13 | 0 | 65 | 44 | 57 | 45 | 19 | 0 | 0 | .096 |
| 10 | 55 | 42 | .02 | 0 | 61 | 47 | 56 | 48 | 16 | 0 | 0 | .080 |
| 11 | 58 | 35 | T | 0 | 65 | 43 | 58 | 46 | 18 | 0 | 0 | .010 |
| 12 | 66 | 40 | 0 | 0 | 69 | 43 | 62 | 44 | 12 | 0 | 3 | .273 |
| 13 | 80 | 39 | 0 | 0 | 78 | 47 | 68 | 47 | 5 | 0 | 10 | .173 |
| 14 | 67 | 35 | 0 | 0 | 17 | 46 | 63 | 50 | 14 | 0 | 1 | .145 |
| 15 | 52 | 33 | .04 | 0 | 58 | 42 | 53 | 46 | 22 | 0 | 0 | .043 |
| 16 | 50 | 37 | .10 | 0 | 60 | 41 | 54 | 43 | 21 | 0 | 0 | .108 |
| 17 | 57 | 37 | 0 | 0 | 69 | 44 | 58 | 47 | 18 | 0 | 0 | .007 |
| 18 | 60 | 41 | T | 0 | 68 | 44 | 61 | 46 | 14 | 0 | 1 | .275 |
| 19 | 54 | 31 | .05 | 0 | 61 | 41 | 53 | 44 | 22 | 0 | 0 | .164 |
| 20 | 47 | 32 | .35 | 0.3 | 58 | 40 | 51 | 42 | 25 | 0 | 0 | .111 |
| 21 | 48 | 33 | .07 | 0 | 60 | 40 | 54 | 42 | 24 | 0 | 0 | .084 |
| 22 | 48 | 36 | .19 | 0 | 57 | 42 | 51 | 44 | 23 | 0 | 0 | .028 |
| 23 | 52 | 40 | .40 | 0 | 56 | 44 | 53 | 46 | 19 | 0 | 0 | .049 |
| 24 | 51 | 39 | .27 | 0 | 54 | 44 | 51 | 46 | 20 | 0 | 0 | .012 |
| 25 | 53 | 30 | .07 | 0 | 58 | 41 | 53 | 45 | 23 | 0 | 0 | .136 |
| 26 | 60 | 37 | 0 | 0 | 72 | 41 | 63 | 43 | 16 | 0 | 0 | .130 |
| 27 | 68 | 40 | 0 | 0 | 74 | 45 | 64 | 45 | 11 | 0 | 4 | .143 |
| 28 | 70 | 47 | 0 | 0 | 73 | 49 | 64 | 49 | 6 | 0 | 9 | .122 |
| 29 | 65 | 43 | .05 | 0 | 68 | 51 | 62 | 53 | 11 | 0 | 4 | .187 |
| 30 | 53 | 38 | .04 | 0 | 62 | 47 | 57 | 50 | 19 | 0 | 0 | .122 |
| Average/Total | 56.5 | 36.6 | 2.38 | 0.30 | 61.3 | 43.1 | 56.5 | 44.9 | 545 | 0 | 32 | 3.193 |
| Departure | -3.0 | -2.6 | -0.18 |   |   |   |   |   |   |   |   |   |