San Luis Obispo, California, United States in January

January17°C average high

January has some of the coolest average daytime highs of the year, so pack for fresher conditions.

Warmest monthsJuly to October

This stretch sets the upper range for average daytime heat.

January116mm average rain

January is one of San Luis Obispo's wettest months, so rain is likely to be a major planning factor.

Driest monthsApril to October

This is the drier part of the year, when outdoor plans usually need less weather flexibility.

January5.7 hours average sun

January is below San Luis Obispo's yearly sunshine average, so bright-day planning is less reliable than in peak months.

Brightest monthsApril to August

This stretch has the strongest sunshine in the monthly averages.

January13°C average sea

January is close to San Luis Obispo's yearly sea-temperature average, so swimming comfort is fairly typical.

Warmest seaJuly to November

Sea temperatures are usually near 14°C in this stretch, so swimming comfort is at its strongest.

January28 weather score

January is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.

Best weather monthsJune to September

These months have the strongest weather score in the monthly averages.