January, is one of two of the coldest months of the year. Average high temperatures don’t get any higher than 65°F (18°C), while the average low temperatures drop to 49°F (9°C).
In February, while the average high temperatures remain at 65°F (18°C), the average low temperatures creep up ever so slightly to 51°F (10°C). This month has a least amount of sunshine out of the whole year, roughly 212 hours on average, while also being the wettest month out of the year. Average precipitation levels are just over 2 inches (58 mm).
San Diego Weather in March: The temperature increases just a tad in March, going up by a single degree for average high temperatures. For low temperatures, the average is 53°F (12°C).
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April signifies the beginning of Spring in San Diego. Temperatures rise but remain cool with high temperatures averaging 67°F (20°C). Low temperatures average 56°F (13°C). This time of the year is great for enjoying the beauty of nature and seeing flowers start to bloom.
In May, temperatures continue to creep up every so slightly. The average high and average low temperatures range between 69°F (20°C) and 59°F (15°C). For those who are keen to do some hiking and mountaineering, this month is ideal as it stays cool and conditions in the mountains are ideal.
San Diego Weather in June: Average high and average low temperatures in June continue to increase. High temperatures will peak at an average of 71°F (22°C). Low temperatures are 62°F (17°C).
In July, temperatures increase a bit more by a few degrees with average high temperatures of 75°F (24°C). This month also has the most hours of sunshine out of the whole year with an average of 293 hours. July also ties with August for the driest month of year with close to 0 inches (1 mm) of precipitation.
August is the hottest month of the year with an average high temperature of 76°F (25°C). Low temperatures are 67°F (19°C).
September ties with August as the hottest month of the year. Temperatures stay exactly the same during this summer month. Although it is one of warmest, the climate is still enjoyable.
In October, the weather decreases by a few degrees with an average high temperatures of 73°F (23°C). This month starts San Diego’s transition to fall and average low temperatures will go down to 61°F (16°C).
San Diego Weather in November: For the month of November, the temperature decreases a few more degrees. Average high and average low temperatures range between 69°F (21°C) and 54°F (12°C).
December is one of the two coldest months in the year and marks the beginning of winter for San Diego. Average high temperatures tie with January at 65°F (18°C), but average low temperatures decrease by one degree.
The great thing about San Diego is that the averages for both high and low temperatures generally stay more or less the same all through out the year, so the whole year is a fantastic time to explore everything that California and the city has to offer. When it comes to exploring the mountains and forests, April through May are the most ideal months due to it being the low season. For the popular attractions like Legoland and Disney World, it’s best to go when school is in session and even more ideal to avoid going during public holidays. Explore wine country from April through June, to see first growth of the vineyards.
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