| Parkfield 044310 Cntrl Cst Mtns & Vlys 1535' | June | July | August |
| Minimum Humidity | |||
| Mean monthly minimum RH% | 31 | 25 | 22 |
| Days 1-10 mean minimum RH% | 33 | 29 | 23 |
| Days 10-20 mean minimum RH% | 32 | 24 | 21 |
| Days 20-30 mean minimum RH% | 29 | 24 | 22 |
| Days 1-10 lowest mean minimum RH% | 16 | 13 | 12 |
| Days 10-20 lowest mean minimum RH% | 14 | 14 | 8 |
| Days 20-30 lowest mean minimum RH% | 12 | 16 | 10 |
| Days 1-10 highest mean minimum RH% | 45 | 54 | 42 |
| Days 10-20 highest mean minimum RH% | 53 | 36 | 35 |
| Days 20-30 highest mean minimum RH% | 64 | 35 | 30 |
| Maximum Humidity | |||
| Mean monthly maximum RH% | 94 | 84 | 79 |
| Days 1-10 mean maximum RH% | 96 | 88 | 78 |
| Day 10-20 mean maximum RH% | 95 | 82 | 80 |
| Days 20-30 mean maximum RH% | 91 | 83 | 78 |
| Days 1-10 lowest mean maximum RH% | 67 | 65 | 48 |
| Days 10-20 lowest mean maximum RH% | 68 | 61 | 50 |
| Days 20-30 lowest mean maximum RH% | 51 | 63 | 40 |
| Days 1-10 highest mean maximum RH% | 100 | 100 | 99 |
| Days 10-20 highest mean maximum RH% | 100 | 100 | 99 |
| Days 20-30 highest mean maximum RH% | 100 | 98 | 93 |
| Maximum temperatures | |||
| Mean monthly maximum temperature | 91 | 96 | 97 |
| Days 1-10 mean maximum temperature | 87 | 96 | 97 |
| Days 10-20 mean maximum temperature | 91 | 96 | 97 |
| Days 20-30 mean maximum temperature | 94 | 96 | 96 |
| Days 1-10 lowest mean maximum temperature | 75 | 89 | 88 |
| Days 10-20 lowest mean maximum temperature | 81 | 90 | 85 |
| Days 20-30 lowest mean maximum temperature | 84 | 88 | 93 |
| Ddays 1-10 highest mean maximum temperature | 101 | 103 | 103 |
| Days 10-20 highest mean maximum temperature | 96 | 102 | 105 |
| Days 20-30 highest mean maximum temperature | 102 | 103 | 101 |
| Highest daily maximum temperature | 112 | 114 | 111 |
| Lowest daily maximum temperature | 63 | 71 | 71 |
| Mimimum temperatures | |||
| Mean monthly minimum temperature | 48 | 53 | 53 |
| Days 1-10 mean minimum temperature | 45 | 53 | 55 |
| Days 10-20 mean minimum temperature | 47 | 52 | 51 |
| Days 20-30 mean minimum temperature | 50 | 53 | 51 |
| Days 1-10 lowest mean minimum temperature | 39 | 44 | 51 |
| Days 10-20 lowest mean minimum temperature | 42 | 46 | 48 |
| Days 20-30 lowest mean minimum temperature | 46 | 46 | 47 |
| Days 1-10 highest mean minimum temperature | 53 | 67 | 61 |
| Days 10-20 highest mean minimum temperature | 52 | 65 | 59 |
| Days 20-30 highest mean minimum temperature | 53 | 63 | 65 |
| Highest daily minimum temperature | 61 | 80 | 70 |
| Lowest daily minimum temperature | 33 | 41 | 39 |
| 1300P Wind Speed | |||
| Days 1-10 mean wind speed | 4 | 4 | 4 |
| Days 10-20 mean wind speed | 5 | 5 | 4 |
| Days 20-30 mean wind speed | 5 | 4 | 4 |
| Days 1-10 max average wind speed | 5 | 5 | 6 |
| Days 10-20 max average wind speed | 7 | 6 | 5 |
| Days 20-30 max average wind speed | 6 | 5 | 5 |
| Period of Record: Temp and RH 9 years, and wind 8 years | |||