Daily Observations at Hyslop Exp. Stn., Corvallis
May 2005
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 | 69 | 40 | 0 | 0 | 77 | 56 | 70 | 56 | 10 | 0 | 5 | .157 |
| 2 | 70 | 49 | .17 | 0 | 76 | 55 | 70 | 55 | 5 | 0 | 10 | .102 |
| 3 | 69 | 40 | 0 | 0 | 77 | 55 | 70 | 58 | 10 | 0 | 5 | .107 |
| 4 | 74 | 49 | .20 | 0 | 82 | 55 | 74 | 57 | 3 | 0 | 12 | .207 |
| 5 | 71 | 50 | .01 | 0 | 83 | 61 | 72 | 62 | 4 | 0 | 11 | .145 |
| 6 | 64 | 52 | .16 | 0 | 69 | 60 | 66 | 61 | 7 | 0 | 8 | .060 |
| 7 | 63 | 48 | trace | 0 | 71 | 58 | 66 | 59 | 9 | 0 | 6 | .146 |
| 8 | 63 | 51 | .03 | 0 | 69 | 58 | 65 | 56 | 8 | 0 | 7 | .096 |
| 9 | 65 | 48 | .13 | 0 | 73 | 58 | 67 | 59 | 8 | 0 | 7 | .066 |
| 10 | 55 | 45 | 1.11 | 0 | 62 | 54 | 59 | 55 | 15 | 0 | 0 | .039 |
| 11 | 59 | 42 | .25 | 0 | 65 | 53 | 61 | 55 | 14 | 0 | 1 | .058 |
| 12 | 63 | 39 | .01 | 0 | 70 | 52 | 64 | 53 | 14 | 0 | 1 | .106 |
| 13 | 71 | 47 | 0 | 0 | 73 | 53 | 71 | 54 | 6 | 0 | 9 | .132 |
| 14 | 75 | 55 | .16 | 0 | 81 | 60 | 74 | 58 | 0 | 0 | 15 | .149 |
| 15 | 75 | 57 | .08 | 0 | 82 | 64 | 75 | 63 | 0 | 1 | 16 | .158 |
| 16 | 63 | 47 | .13 | 0 | 68 | 58 | 66 | 60 | 10 | 0 | 5 | .101 |
| 17 | 60 | 46 | .04 | 0 | 69 | 56 | 66 | 58 | 12 | 0 | 3 | .071 |
| 18 | 58 | 48 | .50 | 0 | 63 | 56 | 61 | 56 | 12 | 0 | 3 | .018 |
| 19 | 65 | 51 | .89 | 0 | 70 | 55 | 65 | 56 | 7 | 0 | 8 | .147 |
| 20 | 65 | 46 | .18 | 0 | 71 | 55 | 65 | 56 | 9 | 0 | 6 | .144 |
| 21 | 63 | 38 | .07 | 0 | 70 | 53 | 65 | 55 | 14 | 0 | 1 | .133 |
| 22 | 60 | 38 | .05 | 0 | 64 | 51 | 61 | 54 | 16 | 0 | 0 | .049 |
| 23 | 64 | 38 | .06 | 0 | 72 | 50 | 66 | 52 | 14 | 0 | 1 | .172 |
| 24 | 65 | 43 | trace | 0 | 76 | 51 | 70 | 52 | 11 | 0 | 4 | .249 |
| 25 | 71 | 49 | 0 | 0 | 75 | 51 | 69 | 54 | 5 | 0 | 10 | .333 |
| 26 | 84 | 56 | 0 | 0 | 81 | 54 | 74 | 55 | 0 | 5 | 20 | .434 |
| 27 | 88 | 50 | 0 | 0 | 85 | 58 | 79 | 59 | 0 | 4 | 19 | .260 |
| 28 | 90 | 53 | 0 | 0 | 64 | 61 | 67 | 62 | 0 | 7 | 22 | .413 |
| 29 | 78 | 50 | .01 | 0 | 78 | 60 | 73 | 63 | 1 | 0 | 14 | .123 |
| 30 | 65 | 52 | 0 | 0 | 71 | 60 | 68 | 61 | 6 | 0 | 9 | .082 |
| 31 | 73 | 42 | 0 | 0 | 85 | 60 | 79 | 61 | 7 | 0 | 8 | .182 |
| Average/Total | 68.3 | 47.1 | 4.24 | 0.00 | 73.3 | 56.2 | 68.3 | 57.3 | 237 | 17 | 246 | 4.639 |
| Departure | 2.2 | 4.0 | 2.29 |