Big Sur to Paso Robles, where the famous summer fog makes the warmest months the least pleasant ones. Daytime highs in California's Central Coast run from about 14 °C in January to 24 °C in August, an annual range of roughly 9 °C.
Measured against a city trip, the conditions hold up February to December. March is the most consistent single month: highs near 16 °C, nights around 8 °C, and roughly 73 mm of rain across the month.
The binding constraint here is temperature — that is what rules months out, not any composite judgement. January is the weakest month on these criteria.
Month by month
| Month | High °C | Low °C | Precip mm | Wet days |
|---|---|---|---|---|
| January | 14 | 7 | 105 | 8.0 |
| February | 15 | 7 | 91 | 8.6 |
| March | 16 | 8 | 73 | 8.3 |
| April | 17 | 9 | 37 | 4.9 |
| May | 19 | 11 | 13 | 2.4 |
| June | 21 | 12 | 3 | 0.6 |
| July | 23 | 14 | 3 | 0.2 |
| August | 24 | 15 | 2 | 0.3 |
| September | 23 | 14 | 4 | 0.8 |
| October | 21 | 12 | 20 | 2.3 |
| November | 18 | 9 | 49 | 5.2 |
| December | 15 | 7 | 88 | 8.1 |
Ticked rows are months where every hard requirement for a city trip is met across at least half the month.
Open California Central Coast on the map →Nearby regions
Figures are 30-year climatology sampled at Monterey, Carmel, Big Sur, San Luis Obispo, Paso Robles and Cambria, averaged across those locations, from ERA5-Land reanalysis fitted with a harmonic seasonal cycle and a trend term, evaluated for 2026. Sampling named towns rather than averaging the whole region avoids blending valley and mountain conditions into a figure true of neither. Cells are about 0.08° wide, from ERA5-Land's 0.1° grid, which is itself driven by a 0.25° (~28 km) atmospheric reanalysis — so individual valleys, sheltered bays and single summits are not resolved. In steep terrain read these as conditions for the wider area rather than for one village. They describe typical conditions, not a forecast. Read how the climatology is built.