Daily Observations at Hyslop Exp. Stn., Corvallis
May 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 | 33 | .06 | 0 | 65 | 44 | 58 | 47 | 23 | 0 | 0 | .117 |
| 2 | 60 | 38 | 0 | 0 | 67 | 43 | 60 | 45 | 16 | 0 | 0 | .120 |
| 3 | 68 | 40 | 0 | 0 | 73 | 51 | 65 | 53 | 11 | 0 | 4 | .109 |
| 4 | 62 | 35 | 0 | 0 | 68 | 46 | 61 | 51 | 16 | 0 | 0 | .135 |
| 5 | 68 | 41 | 0 | 0 | 72 | 48 | 67 | 49 | 10 | 0 | 5 | .108 |
| 6 | 73 | 40 | 0 | 0 | 79 | 51 | 72 | 52 | 8 | 0 | 7 | .289 |
| 7 | 62 | 44 | 0 | 0 | 71 | 53 | 64 | 55 | 12 | 0 | 3 | .109 |
| 8 | 56 | 40 | 0 | 0 | 62 | 50 | 58 | 53 | 17 | 0 | 0 | .063 |
| 9 | 55 | 38 | 0 | 0 | 62 | 48 | 58 | 50 | 18 | 0 | 0 | .084 |
| 10 | 63 | 43 | T | 0 | 78 | 48 | 70 | 49 | 12 | 0 | 3 | .174 |
| 11 | 61 | 43 | T | 0 | 66 | 51 | 61 | 50 | 13 | 0 | 2 | .079 |
| 12 | 59 | 34 | 0 | 0 | 75 | 42 | 68 | 52 | 18 | 0 | 0 | .225 |
| 13 | 61 | 46 | .01 | 0 | 78 | 50 | 70 | 50 | 11 | 0 | 4 | .053 |
| 14 | 63 | 51 | 0 | 0 | 64 | 57 | 61 | 57 | 8 | 0 | 7 | .180 |
| 15 | 75 | 55 | 0 | 0 | 85 | 59 | 74 | 57 | 0 | 0 | 15 | .188 |
| 16 | 85 | 58 | 0 | 0 | 88 | 61 | 80 | 60 | 0 | 7 | 22 | .346 |
| 17 | 94 | 56 | 0 | 0 | 99 | 64 | 88 | 64 | 0 | 10 | 25 | .276. |
| 18 | 92 | 48 | 0 | 0 | 101 | 64 | 91 | 68 | 0 | 5 | 20 | .334 |
| 19 | 85 | 47 | 0 | 0 | 97 | 63 | 88 | 66 | 0 | 1 | 16 | .162 |
| 20 | 85 | 48 | .22 | 0 | 97 | 65 | 85 | 66 | 0 | 2 | 17 | .238 |
| 21 | 61 | 48 | t | 0 | 74 | 57 | 70 | 60 | 10 | 0 | 5 | .182 |
| 22 | 60 | 45 | 0 | 0 | 76 | 55 | 71 | 58 | 12 | 0 | 3 | .211 |
| 23 | 58 | 45 | 0 | 0 | 70 | 56 | 66 | 57 | 13 | 0 | 2 | .234 |
| 24 | 55 | 46 | .05 | 0 | 64 | 56 | 61 | 57 | 14 | 0 | 1 | .026 |
| 25 | 73 | 50 | T | 0 | 84 | 56 | 74 | 55 | 3 | 0 | 12 | .160 |
| 26 | 62 | 52 | .03 | 0 | 73 | 60 | 67 | 58 | 8 | 0 | 7 | .008 |
| 27 | 63 | 51 | T | 0 | 70 | 56 | 65 | 59 | 8 | 0 | 7 | .105 |
| 28 | 68 | 53 | .01 | 0 | 83 | 60 | 75 | 58 | 4 | 0 | 11 | .186 |
| 29 | 61 | 51 | T | 0 | 72 | 59 | 67 | 61 | 9 | 0 | 6 | .164 |
| 30 | 64 | 48 | 0 | 0 | 75 | 59 | 69 | 59 | 9 | 0 | 6 | .123 |
| 31 | 69 | 42 | 0 | 0 | 90 | 59 | 80 | 59 | 9 | 0 | 6 | .134 |
| Average/Total | 66.8 | 45.5 | 0.38 | 0.00 | 76.7 | 54.5 | 69.8 | 56.0 | 292 | 25 | 216 | 4.922 |
| Departure | 0.7 | 2.4 | -1.57 |   |   |   |   |   |   |   |   |   |