| Arroyo Seco 044301 Cntrl Cst Mtns & vlys 800' | June | July | August |
| Minimum Humidity | |||
| Mean monthly minimum RH% | 21 | 21 | 19 |
| Days 1-10 mean minimum RH% | 22 | 20 | 19 |
| Days 10-20 mean minimum RH% | 20 | 22 | 18 |
| Days 20-30 mean minimum RH% | 21 | 23 | 19 |
| Days 1-10 lowest mean minimum RH% | 11 | 13 | 14 |
| Days 10-20 lowest mean minimum RH% | 11 | 18 | 7 |
| Days 20-30 lowest mean minimum RH% | 12 | 12 | 13 |
| Days 1-10 highest mean minimum RH% | 48 | 32 | 28 |
| Days 10-20 highest mean minimum RH% | 35 | 29 | 26 |
| Days 20-30 highest mean minimum RH% | 35 | 34 | 24 |
| Maximum Humidity | |||
| Mean monthly maximum RH% | 80 | 84 | 78 |
| Days 1-10 mean maximum RH% | 78 | 80 | 76 |
| Day 10-20 mean maximum RH% | 79 | 83 | 78 |
| Days 20-30 mean maximum RH% | 81 | 90 | 79 |
| Days 1-10 lowest mean maximum RH% | 59 | 66 | 57 |
| Days 10-20 lowest mean maximum RH% | 59 | 74 | 53 |
| Days 20-30 lowest mean maximum RH% | 59 | 72 | 66 |
| Days 1-10 highest mean maximum RH% | 97 | 95 | 90 |
| Days 10-20 highest mean maximum RH% | 96 | 99 | 93 |
| Days 20-30 highest mean maximum RH% | 96 | 99 | 88 |
| Maximum temperatures | |||
| Mean monthly maximum temperature | 90 | 93 | 94 |
| Days 1-10 mean maximum temperature | 87 | 95 | 96 |
| Days 10-20 mean maximum temperature | 91 | 93 | 94 |
| Days 20-30 mean maximum temperature | 92 | 93 | 93 |
| Days 1-10 lowest mean maximum temperature | 76 | 87 | 87 |
| Days 10-20 lowest mean maximum temperature | 78 | 86 | 84 |
| Days 20-30 lowest mean maximum temperature | 83 | 87 | 86 |
| Ddays 1-10 highest mean maximum temperature | 102 | 105 | 103 |
| Days 10-20 highest mean maximum temperature | 99 | 100 | 103 |
| Days 20-30 highest mean maximum temperature | 99 | 104 | 99 |
| Highest daily maximum temperature | 114 | 114 | 115 |
| Lowest daily maximum temperature | 63 | 77 | 75 |
| Mimimum temperatures | |||
| Mean monthly minimum temperature | 53 | 55 | 55 |
| Days 1-10 mean minimum temperature | 51 | 56 | 56 |
| Days 10-20 mean minimum temperature | 53 | 55 | 54 |
| Days 20-30 mean minimum temperature | 54 | 55 | 55 |
| Days 1-10 lowest mean minimum temperature | 43 | 46 | 43 |
| Days 10-20 lowest mean minimum temperature | 47 | 47 | 44 |
| Days 20-30 lowest mean minimum temperature | 47 | 49 | 46 |
| Days 1-10 highest mean minimum temperature | 64 | 67 | 75 |
| Days 10-20 highest mean minimum temperature | 72 | 67 | 66 |
| Days 20-30 highest mean minimum temperature | 72 | 66 | 68 |
| Highest daily minimum temperature | 86 | 82 | 89 |
| Lowest daily minimum temperature | 37 | 42 | 40 |
| 1300P Wind Speed | |||
| Days 1-10 mean wind speed | 5 | 6 | 7 |
| Days 10-20 mean wind speed | 6 | 7 | 7 |
| Days 20-30 mean wind speed | 6 | 6 | 6 |
| Days 1-10 max average wind speed | 7 | 9 | 10 |
| Days 10-20 max average wind speed | 8 | 10 | 10 |
| Days 20-30 max average wind speed | 10 | 9 | 9 |
| Period of Record: Temp and wind 16 years and RH 7 years | |||