| Parkfield 044310 Cntrl Cst Mtns & Vlys 1535' | September | October | November |
| Minimum Humidity | |||
| Mean monthly minimum RH% | 26 | 30 | 43 |
| Days 1-10 mean minimum RH% | 24 | 28 | 39 |
| Days 10-20 mean minimum RH% | 25 | 28 | 43 |
| Days 20-30 mean minimum RH% | 28 | 33 | 46 |
| Days 1-10 lowest mean minimum RH% | 13 | 14 | 15 |
| Days 10-20 lowest mean minimum RH% | 13 | 10 | 27 |
| Days 20-30 lowest mean minimum RH% | 15 | 16 | 27 |
| Days 1-10 highest mean minimum RH% | 35 | 38 | 48 |
| Days 10-20 highest mean minimum RH% | 33 | 48 | 63 |
| Days 20-30 highest mean minimum RH% | 40 | 55 | 65 |
| Maximum Humidity | |||
| Mean monthly maximum RH% | 83 | 88 | 97 |
| Days 1-10 mean maximum RH% | 79 | 87 | 93 |
| Day 10-20 mean maximum RH% | 84 | 86 | 100 |
| Days 20-30 mean maximum RH% | 84 | 89 | 98 |
| Days 1-10 lowest mean maximum RH% | 56 | 63 | 62 |
| Days 10-20 lowest mean maximum RH% | 61 | 50 | 100 |
| Days 20-30 lowest mean maximum RH% | 61 | 69 | 95 |
| Days 1-10 highest mean maximum RH% | 95 | 100 | 100 |
| Days 10-20 highest mean maximum RH% | 99 | 100 | 100 |
| Days 20-30 highest mean maximum RH% | 99 | 96 | 100 |
| Maximum temperatures | |||
| Mean monthly maximum temperature | 93 | 83 | 71 |
| Days 1-10 mean maximum temperature | 95 | 87 | 74 |
| Days 10-20 mean maximum temperature | 94 | 84 | 71 |
| Days 20-30 mean maximum temperature | 90 | 80 | 70 |
| Days 1-10 lowest mean maximum temperature | 87 | 81 | 67 |
| Days 10-20 lowest mean maximum temperature | 88 | 77 | 62 |
| Days 20-30 lowest mean maximum temperature | 75 | 72 | 63 |
| Ddays 1-10 highest mean maximum temperature | 98 | 95 | 80 |
| Days 10-20 highest mean maximum temperature | 99 | 92 | 77 |
| Days 20-30 highest mean maximum temperature | 96 | 87 | 77 |
| Highest daily maximum temperature | 108 | 104 | 89 |
| Lowest daily maximum temperature | 69 | 60 | 55 |
| Mimimum temperatures | |||
| Mean monthly minimum temperature | 49 | 46 | 37 |
| Days 1-10 mean minimum temperature | 51 | 47 | 39 |
| Days 10-20 mean minimum temperature | 49 | 47 | 37 |
| Days 20-30 mean minimum temperature | 48 | 45 | 36 |
| Days 1-10 lowest mean minimum temperature | 43 | 41 | 35 |
| Days 10-20 lowest mean minimum temperature | 44 | 37 | 34 |
| Days 20-30 lowest mean minimum temperature | 35 | 40 | 32 |
| Days 1-10 highest mean minimum temperature | 61 | 60 | 42 |
| Days 10-20 highest mean minimum temperature | 53 | 60 | 43 |
| Days 20-30 highest mean minimum temperature | 54 | 56 | 38 |
| Highest daily minimum temperature | 69 | 72 | 70 |
| Lowest daily minimum temperature | 38 | 32 | 23 |
| 1300P Wind Speed | |||
| Days 1-10 mean wind speed | 3.7 | 4 | 4 |
| Days 10-20 mean wind speed | 3.8 | 4.2 | 2.9 |
| Days 20-30 mean wind speed | 4.4 | 4 | 2.8 |
| Days 1-10 max average wind speed | 4.4 | 6.5 | 5.5 |
| Days 10-20 max average wind speed | 4.5 | 7 | 4.3 |
| Days 20-30 max average wind speed | 5 | 5.6 | 3.8 |
| Period of Record: 10 years | |||