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The climate in the Big Sur and Monterey Peninsula area is really made up of several mini-climates and can vary depending upon the time of year, the time of day and the area visited. Afternoons when a cool breeze blows in off the ocean a drive just several miles inland can see an increase in temperature of 5-10 degrees and more. Likewise, if it's foggy in Pacific Grove it doesn't mean it's foggy in Monterey or inland. Early autumn is the coast's sunniest time of year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Average temp. (°F) | 51.6 | 53.1 | 53.8 | 55.4 | 56.6 | 58.7 | 60.2 | 61.4 | 62.3 | 60.4 | 55.5 | 51.5 |
| High temperature (°F) | 59.8 | 61.4 | 61.9 | 64.1 | 64.6 | 66.9 | 68.1 | 69.5 | 71.4 | 69.9 | 64.2 | 59.7 |
| Low temperature (°F) | 43.4 | 44.7 | 45.7 | 46.6 | 48.5 | 50.4 | 52.3 | 53.2 | 53.1 | 50.9 | 46.7 | 43.2 |
| Precipitation (in) | 4.2 | 3.7 | 3.5 | 1.5 | 0.5 | 0.2 | 0.1 | 0.1 | 0.3 | 1.1 | 2.4 | 2.7 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Days with precip. | 8 | 8 | 8 | 4 | 2 | 1 | 0 | 0 | 1 | 2 | 5 | 7 |
| Wind speed (mph) | 5.8 | 6.3 | 7.3 | 7.8 | 8.3 | 8.5 | 7.5 | 7.0 | 6.3 | 5.6 | 5.3 | 5.5 |
| Morning humidity (%) | 89 | 88 | 86 | 82 | 77 | 73 | 70 | 73 | 76 | 79 | 86 | 88 |
| Afternoon humidity (%) | 67 | 58 | 52 | 42 | 36 | 33 | 31 | 32 | 35 | 41 | 56 | 66 |
| Sunshine (%) | 48 | 65 | 76 | 84 | 90 | 95 | 97 | 96 | 94 | 87 | 66 | 47 |
| Days clear of clouds | 7 | 9 | 11 | 13 | 17 | 21 | 25 | 24 | 22 | 19 | 12 | 9 |
| Partly cloudy days | 7 | 7 | 8 | 9 | 9 | 6 | 5 | 5 | 5 | 7 | 7 | 6 |
| Cloudy days | 17 | 12 | 12 | 8 | 5 | 2 | 1 | 1 | 2 | 5 | 11 | 16 |
| Snowfall (in) | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |