Daily Observations at Hyslop Exp. Stn., Corvallis
May 2000
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 | 70 | 40 | 0 | 76 | 51 | 69 | 52 | 10 | 0 | 5 | .184 |
| 2 | 67 | 48 | .26 | 73 | 54 | 66 | 54 | 7 | 0 | 8 | .106 |
| 3 | 66 | 49 | .13 | 71 | 57 | 66 | 58 | 7 | 0 | 8 | .143 |
| 4 | 62 | 45 | .03 | 69 | 54 | 64 | 55 | 11 | 0 | 4 | .052 |
| 5 | 60 | 44 | .38 | 67 | 54 | 63 | 55 | 13 | 0 | 2 | .199 |
| 6 | 57 | 34 | .12 | 71 | 50 | 64 | 52 | 19 | 0 | 0 | .064 |
| 7 | 62 | 39 | 0 | 76 | 49 | 68 | 50 | 14 | 0 | 1 | .067 |
| 8 | 65 | 41 | .19 | 74 | 53 | 67 | 54 | 12 | 0 | 3 | .064 |
| 9 | 65 | 50 | .29 | 68 | 52 | 64 | 57 | 7 | 0 | 8 | .240 |
| 10 | 57 | 41 | .44 | 66 | 51 | 62 | 52 | 16 | 0 | 0 | .240 |
| 11 | 54 | 41 | .70 | 55 | 49 | 54 | 50 | 17 | 0 | 0 | .050 |
| 12 | 55 | 35 | .05 | 63 | 48 | 59 | 49 | 20 | 0 | 0 | .098 |
| 13 | 63 | 42 | 0 | 71 | 48 | 65 | 50 | 12 | 0 | 3 | .113 |
| 14 | 66 | 47 | 0 | 70 | 54 | 65 | 53 | 8 | 0 | 7 | .154 |
| 15 | 75 | 50 | .07 | 78 | 55 | 70 | 54 | 2 | 0 | 13 | .163 |
| 16 | 70 | 44 | 0 | 83 | 56 | 73 | 58 | 8 | 0 | 7 | |
| 17 | 69 | 40 | 0 | 75 | 55 | 70 | 57 | 10 | 0 | 5 | .171 |
| 18 | 66 | 43 | 0 | 76 | 55 | 68 | 57 | 10 | 0 | 5 | .123 |
| 19 | 74 | 51 | .02 | 82 | 55 | 74 | 55 | 2 | 0 | 13 | .153 |
| 20 | 75 | 48 | 0 | 78 | 60 | 72 | 60 | 3 | 0 | 12 | .158 |
| 21 | 78 | 47 | 0 | 84 | 59 | 75 | 60 | 2 | 0 | 13 | .187 |
| 22 | 80 | 49 | 0 | 84 | 59 | 77 | 60 | 0 | 0 | 15 | .206 |
| 23 | 75 | 51 | 0 | 86 | 61 | 80 | 61 | 2 | 0 | 13 | .265 |
| 24 | 68 | 50 | 0 | 84 | 62 | 76 | 63 | 6 | 0 | 9 | .167 |
| 25 | 72 | 42 | 0 | 86 | 59 | 79 | 61 | 8 | 0 | 7 | .174 |
| 26 | 67 | 47 | .01 | 79 | 59 | 73 | 60 | 8 | 0 | 7 | .163 |
| 27 | 70 | 54 | .07 | 84 | 62 | 76 | 61 | 3 | 0 | 12 | .249 |
| 28 | 67 | 49 | .09 | 73 | 58 | 68 | 60 | 7 | 0 | 8 | .108 |
| 29 | 69 | 49 | .05 | 74 | 59 | 69 | 59 | 6 | 0 | 9 | .160 |
| 30 | 63 | 46 | .03 | 73 | 58 | 68 | 59 | 10 | 0 | 5 | .114 |
| 31 | 62 | 46 | .06 | 74 | 57 | 69 | 58 | 11 | 0 | 4 | .177 |
| Average/Total | 66.7 | 45.2 | 2.99 | 74.9 | 55.3 | 68.8 | 56.3 | 271 | 0 | 206 | 4.512 |
| Departure | 0.6 | 2.1 | 1.04 |   |   |   |   |   |   |   |   |