Daily Observations at Hyslop Exp. Stn., Corvallis
August 2003
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 | 83 | 51 | 0 | 108 | 73 | 97 | 77 | 0 | 2 | 17 | .389 |
| 2 | 84 | 64 | 0 | 104 | 73 | 93 | 77 | 0 | 9 | 24 | .333 |
| 3 | 74 | 57 | 0 | 83 | 72 | 80 | 75 | 0 | 1 | 16 | .125 |
| 4 | 80 | 49 | 0 | 93 | 67 | 85 | 72 | 0 | 0 | 15 | .147 |
| 5 | 84 | 54 | .07 | 103 | 67 | 91 | 70 | 0 | 4 | 19 | .338 |
| 6 | 76 | 47 | .03 | 65 | 47 | 84 | 70 | 3 | 0 | 12 | .157 |
| 7 | 80 | 56 | .01 | 99 | 66 | 88 | 68 | 0 | 3 | 18 | .231 |
| 8 | 82 | 53 | 0 | 101 | 71 | 92 | 72 | 0 | 3 | 18 | .303 |
| 9 | 83 | 58 | 0 | 103 | 72 | 93 | 73 | 0 | 6 | 21 | .288 |
| 10 | 83 | 52 | 0 | 104 | 73 | 93 | 75 | 0 | 3 | 18 | .313 |
| 11 | 82 | 50 | 0 | 105 | 70 | 91 | 74 | 0 | 1 | 16 | .269 |
| 12 | 78 | 45 | 0 | 97 | 67 | 87 | 72 | 3 | 0 | 12 | .141 |
| 13 | 80 | 50 | 0 | 102 | 67 | 91 | 70 | 0 | 0 | 15 | .420 |
| 14 | 83 | 55 | 0 | 103 | 68 | 92 | 71 | 0 | 4 | 19 | .327 |
| 15 | 91 | 57 | 0 | 106 | 70 | 94 | 73 | 0 | 9 | 24 | .304 |
| 16 | 80 | 49 | 0 | 102 | 70 | 90 | 74 | 0 | 0 | 15 | .224 |
| 17 | 83 | 58 | 0 | 104 | 69 | 92 | 72 | 0 | 6 | 21 | .312 |
| 18 | 89 | 57 | 0 | 106 | 72 | 94 | 73 | 0 | 8 | 23 | .275 |
| 19 | 92 | 52 | 0 | 105 | 72 | 94 | 76 | 0 | 7 | 22 | .485 |
| 20 | 83 | 48 | 0 | 105 | 68 | 93 | 74 | 0 | 1 | 16 | .403 |
| 21 | 83 | 42 | 0 | 102 | 67 | 91 | 73 | 2 | 0 | 13 | .143 |
| 22 | 90 | 51 | 0 | 105 | 67 | 93 | 72 | 0 | 6 | 21 | .376 |
| 23 | 75 | 54 | 0 | 93 | 70 | 83 | 69 | 0 | 0 | 15 | .198 |
| 24 | 78 | 46 | 0 | 100 | 67 | 88 | 71 | 3 | 0 | 12 | .277 |
| 25 | 87 | 48 | 0 | 103 | 66 | 91 | 67 | 0 | 3 | 18 | .278 |
| 26 | 91 | 52 | 0 | 105 | 67 | 92 | 71 | 0 | 7 | 22 | .351 |
| 27 | 80 | 54 | 0 | 97 | 72 | 88 | 73 | 0 | 2 | 17 | .214 |
| 28 | 79 | 51 | 0 | 101 | 68 | 90 | 73 | 0 | 0 | 15 | .289 |
| 29 | 86 | 48 | 0 | 102 | 67 | 90 | 71 | 0 | 2 | 17 | .256 |
| 30 | 87 | 49 | 0 | 101 | 67 | 89 | 71 | 0 | 3 | 18 | .251 |
| 31 | 92 | 49 | 0 | 102 | 68 | 90 | 72 | 0 | 6 | 21 | .300 |
| Average/Total | 83.2 | 51.8 | 0.11 | 100.3 | 68.4 | 90.3 | 72.3 | 11 | 96 | 550 | 8.717 |
| Departure | 2.1 | 0.5 | -0.76 |   |   |   |   |   |   |   |   |