Daily Observations at Hyslop Exp. Stn., Corvallis
May 2002
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 | 61 | 47 | 0 | 69 | 52 | 63 | 54 | 11 | 0 | 4 | .097 |
| 2 | 66 | 37 | 0 | 80 | 50 | 72 | 55 | 13 | 0 | 2 | .162 |
| 3 | 57 | 35 | 0 | 66 | 48 | 62 | 52 | 19 | 0 | 0 | .075 |
| 4 | 60 | 32 | 0 | 79 | 47 | 70 | 50 | 19 | 0 | 0 | .172 |
| 5 | 64 | 43 | T | 82 | 47 | 72 | 50 | 11 | 0 | 4 | .194 |
| 6 | 55 | 42 | .07 | 62 | 51 | 59 | 53 | 16 | 0 | 0 | .065 |
| 7 | 53 | 32 | T | 63 | 47 | 59 | 50 | 22 | 0 | 0 | .019 |
| 8 | 57 | 31 | 0 | 73 | 44 | 64 | 48 | 21 | 0 | 0 | .120 |
| 9 | 63 | 35 | 0 | 82 | 44 | 72 | 47 | 16 | 0 | 0 | .274 |
| 10 | 51 | 36 | 0 | 67 | 48 | 62 | 52 | 21 | 0 | 0 | .097 |
| 11 | 62 | 34 | 0 | 82 | 49 | 72 | 50 | 17 | 0 | 0 | .188 |
| 12 | 69 | 42 | 0 | 88 | 48 | 77 | 52 | 9 | 0 | 6 | .226 |
| 13 | 82 | 49 | 0 | 93 | 54 | 82 | 56 | 0 | 1 | 16 | .229 |
| 14 | 56 | 43 | .09 | 66 | 54 | 63 | 55 | 15 | 0 | 0 | .050 |
| 15 | 65 | 36 | 0 | 85 | 51 | 75 | 55 | 14 | 0 | 1 | .231 |
| 16 | 66 | 39 | 0 | 85 | 51 | 77 | 54 | 12 | 0 | 3 | .213 |
| 17 | 71 | 47 | .32 | 88 | 54 | 77 | 56 | 6 | 0 | 9 | .161 |
| 18 | 64 | 45 | .01 | 81 | 57 | 73 | 59 | 10 | 0 | 5 | .180 |
| 19 | 65 | 46 | .05 | 82 | 57 | 73 | 59 | 9 | 0 | 6 | .140 |
| 20 | 58 | 45 | .33 | 66 | 55 | 63 | 57 | 13 | 0 | 2 | .028 |
| 21 | 65 | 41 | .09 | 79 | 54 | 70 | 55 | 12 | 0 | 3 | .140 |
| 22 | 62 | 45 | T | 72 | 54 | 66 | 54 | 11 | 0 | 4 | .151 |
| 23 | 58 | 35 | .40 | 70 | 54 | 63 | 52 | 18 | 0 | 0 | .112 |
| 24 | 66 | 43 | 0 | 80 | 50 | 70 | 50 | 10 | 0 | 5 | .263 |
| 25 | 74 | 50 | 0 | 85 | 55 | 74 | 56 | 3 | 0 | 12 | .168 |
| 26 | 76 | 51 | T | 86 | 61 | 75 | 60 | 1 | 0 | 14 | .175 |
| 27 | 76 | 56 | 0 | 91 | 63 | 79 | 62 | 0 | 1 | 16 | .205 |
| 28 | 71 | 56 | .20 | 79 | 63 | 72 | 64 | 1 | 0 | 14 | .076 |
| 29 | 66 | 57 | .19 | 73 | 63 | 68 | 62 | 3 | 0 | 12 | .010 |
| 30 | 70 | 47 | T | 77 | 59 | 71 | 61 | 6 | 0 | 9 | .132 |
| 31 | 75 | 44 | 0 | 88 | 56 | 78 | 58 | 5 | 0 | 10 | .283 |
| Average/Total | 64.6 | 42.6 | 1.75 | 78.0 | 52.9 | 70.1 | 54.8 | 344 | 2 | 157 | 4.636 |
| Departure | -1.5 | -0.5 | -0.20 |   |   |   |   |   |   |   |   |