San Diego in January
Mild and quiet
By Daan · Last reviewed October 2026
The short answer
January is a reasonable month in San Diego — with trade-offs.
January is mild and quiet, with gray whales passing the coast.
January in detail
What January actually feels like
- Weather
- 10–19°C
- Mild days and cool nights, with occasional rain.
- Crowds
- Low–Moderate
- Quiet after the holidays.
- Prices
- $$
- Good value.
+Whale watching and good rates.
–Cool water and some rain.
My tip for January
Book a whale-watching trip from the harbor.
- Whale watching
- City break
How January compares
Against the other eleven months
4th of 12 overall in San Diego, 10th for weather, 1st for space, 2nd for value. It is the emptiest month of the year; the best value is November.
See all twelve months for San DiegoNot set on January?
Even stronger months in San Diego
Also good in January
Weather
Weather in San Diego in January
In January San Diego averages a high of 19°C (66°F) and a low of 10°C (50°F), with about 50 mm of rain or snow over 7 wet days. The warmest month is August (around 25°C) and the coolest is January (around 19°C); the wettest month is February.
- Average high
- 19°C
- 66°F
- Average low
- 10°C
- 50°F
- Precipitation
- 50 mm
- Wet days
- 7
Climate data: NOAA (San Diego International Airport, 1991–2020). Temperatures are averages of daily highs and lows.
Quick answers
San Diego in January: the questions people ask
- Is January a good time to visit San Diego?
- January is a reasonable month in San Diego — with trade-offs. It ranks 4 of 12 months in San Diego overall (10 for weather, 1 for space, 2 for value). The main upside: Whale watching and good rates. The main downside: Cool water and some rain.
- What is the weather like in San Diego in January?
- Average highs are around 19°C and lows around 10°C. Expect about 50 mm of rain or snow over roughly 7 wet days. Mild days and cool nights, with occasional rain. For comparison, the warmest month is August (around 25°C) and the coolest is January (around 19°C).
- Is San Diego crowded in January?
- Crowds are low–moderate. Quiet after the holidays. January is the quietest month of the year.
- How expensive is San Diego in January?
- Prices are at level 2 of 5 ($$). Good value. The best-value month is November.
- When is the best time to visit San Diego?
- In the CrowdFreeViews month scores, October is the best month overall (January ranks 4 of 12). The quietest month is January and the best value is November.
Ready to book January in San Diego?
Whale watching and good rates.
Find hotels in San DiegoAffiliate link