Daily Observations at Hyslop Exp. Stn., Corvallis
June 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 | 67 | 41 | 0 | 83 | 56 | 76 | 59 | 11 | 0 | 4 | .139 |
| 2 | 76 | 41 | 0 | 95 | 56 | 85 | 57 | 6 | 0 | 9 | .273 |
| 3 | 76 | 47 | 0 | 95 | 61 | 85 | 63 | 3 | 0 | 12 | .186 |
| 4 | 82 | 43 | 0 | 100 | 64 | 90 | 66 | 2 | 0 | 13 | .181 |
| 5 | 82 | 50 | .03 | 100 | 67 | 90 | 68 | 0 | 1 | 16 | .281 |
| 6 | 73 | 50 | .18 | 85 | 63 | 78 | 65 | 3 | 0 | 12 | .199 |
| 7 | 63 | 49 | .26 | 76 | 60 | 70 | 62 | 9 | 0 | 6 | .068 |
| 8 | 65 | 50 | .89 | 78 | 59 | 72 | 61 | 7 | 0 | 8 | .172 |
| 9 | 68 | 52 | .05 | 77 | 58 | 71 | 60 | 5 | 0 | 10 | .137 |
| 10 | 62 | 52 | T | 67 | 59 | 65 | 61 | 8 | 0 | 7 | .054 |
| 11 | 63 | 48 | 0 | 73 | 59 | 67 | 60 | 9 | 0 | 6 | .169 |
| 12 | 63 | 46 | 0 | 71 | 57 | 66 | 59 | 10 | 0 | 5 | .085 |
| 13 | 68 | 50 | .05 | 78 | 58 | 72 | 58 | 6 | 0 | 9 | .149 |
| 14 | 66 | 44 | .05 | 74 | 57 | 69 | 60 | 10 | 0 | 5 | .050 |
| 15 | 69 | 50 | 0 | 78 | 57 | 72 | 58 | 5 | 0 | 10 | .204 |
| 16 | 76 | 54 | 0 | 84 | 57 | 77 | 58 | 0 | 0 | 15 | .469 |
| 17 | 87 | 60 | 0 | 91 | 58 | 83 | 60 | 0 | 9 | 24 | .462 |
| 18 | 92 | 62 | 0 | 98 | 64 | 88 | 65 | 0 | 12 | 27 | .451 |
| 19 | 89 | 46 | 0 | 100 | 66 | 91 | 70 | 0 | 3 | 18 | .432 |
| 20 | 86 | 48 | 0 | 101 | 67 | 92 | 68 | 0 | 2 | 17 | .313 |
| 21 | 88 | 48 | 0 | 103 | 68 | 94 | 69 | 0 | 3 | 18 | .305 |
| 22 | 87 | 51 | 0 | 105 | 69 | 95 | 71 | 0 | 4 | 19 | .318 |
| 23 | 67 | 57 | 0 | 78 | 69 | 76 | 71 | 3 | 0 | 12 | .077 |
| 24 | 68 | 58 | 0 | 88 | 68 | 75 | 70 | 2 | 0 | 13 | .101 |
| 25 | 75 | 55 | 0 | 84 | 68 | 79 | 69 | 0 | 0 | 15 | .164 |
| 26 | 78 | 55 | 0 | 98 | 68 | 88 | 68 | 0 | 2 | 17 | .228 |
| 27 | 78 | 48 | 0 | 99 | 69 | 90 | 70 | 2 | 0 | 13 | .278 |
| 28 | 80 | 49 | 0 | 99 | 68 | 91 | 69 | 0 | 0 | 15 | .348 |
| 29 | 84 | 50 | 0 | 100 | 67 | 92 | 70 | 0 | 2 | 17 | .232 |
| 30 | 84 | 48 | 0 | 102 | 69 | 94 | 72 | 0 | 1 | 16 | .340 |
| Average/Total | 75.4 | 50.1 | 1.51 | 88.7 | 62.9 | 81.1 | 64.6 | 101 | 39 | 388 | 6.865 |
| Departure | 2.3 | 1.5 | 0.28 |   |   |   |   |   |   |   |   |