San Luis Obispo Weather in September

San Luis Obispo in September sees high daytime temperatures of 28°C (82°F) and nighttime lows of 12°C (54°F). With just 0.4 mm (0.02 in) of rainfall on average, it's the driest month of the year.

Rainfall in San Luis Obispo in September

This month sees the least rain of the year, making it well suited for outdoor adventures. Climate statistics over the past 30 years suggest around a single day of rain, with 0.4 mm (0.02 in) average for the month. On the rare occasion it rains this month, it usually amounts to very little.

Temperature in San Luis Obispo in September

If you're visiting San Luis Obispo in September, expect excellent temperatures with highs of 28°C (82°F) and overnight lows of 12°C (54°F). Experience the summer season in September. This kind of day-to-night contrast is typical for this time of year. Nights cool down to 12°C (54°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions. On average, it is the warmest month of the year.

Sunshine in San Luis Obispo in September

The city usually sees around 270 hours of sunlight, indicating many sunny days , a great month for sightseeing.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. March, April, May, June, July, August, September, October and November typically offer the best weather for San Luis Obispo.