San Diego (CA)
January
Weather in San Diego, California for January 2027
Your guide to San Diego weather in January - trends and predictions
In general, the average temperature in San Diego at the beginning of January is 16 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 17.4 °F by the end of January.
San Diego experiences moderate rainfall in January, with an average of 7 rainy days and a total precipitation of 90.6 mm.
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Temperatures
Rain 🌧️
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25
Dry days
7
Rainy days
0
Snow days
17°/10°
Temperatures
15 km/h
Avg max wind
61 %
Avg humidity
San Diego Weather January
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Temperatures trend during January in San Diego
See the weather trend as well as the moving average line
January weather in San Diego day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Jan. 1 |  Moderate or heavy rain shower | 16° /12° | 23.9 mm | 3 | |
| Jan. 2 |  Partly cloudy | 16° /12° | 3 mm | 3 | |
| Jan. 3 | Moderate rain at times | 16° /12° | 3.4 mm | 3 | |
| Jan. 4 |  Patchy rain possible | 15° /11° | 1.7 mm | 3 | |
| Jan. 5 | Moderate or heavy rain shower | 17° /11° | 9.8 mm | 4 | |
| Jan. 6 |  Sunny | 17° /10° | 0 mm | 4 | |
| Jan. 7 |  Overcast | 15° /11° | 1.3 mm | 3 | |
| Jan. 8 | Partly cloudy | 16° /10° | 0 mm | 4 | |
| Jan. 9 | Sunny | 17° /8° | 0.1 mm | 4 | |
| Jan. 10 | Sunny | 18° /9° | 5.4 mm | 4 | |
| Jan. 11 | Sunny | 18° /10° | 0.3 mm | 4 | |
| Jan. 12 | Sunny | 19° /8° | 0 mm | 4 | |
| Jan. 13 | Sunny | 19° /8° | 0 mm | 4 | |
| Jan. 14 | Moderate or heavy rain shower | 18° /9° | 7.1 mm | 4 | |
| Jan. 15 | Moderate rain at times | 18° /9° | 3.1 mm | 4 | |
| Jan. 16 | Partly cloudy | 16° /10° | 6.7 mm | 3 | |
| Jan. 17 |  Cloudy | 16° /9° | 1.4 mm | 3 | |
| Jan. 18 | Partly cloudy | 15° /10° | 0 mm | 4 | |
| Jan. 19 | Patchy rain possible | 17° /9° | 0.2 mm | 3 | |
| Jan. 20 | Patchy rain possible | 16° /10° | 3.4 mm | 3 | |
| Jan. 21 | Sunny | 16° /9° | 1.8 mm | 4 | |
| Jan. 22 | Sunny | 16° /10° | 3.4 mm | 3 | |
| Jan. 23 | Sunny | 17° /11° | 3.6 mm | 4 | |
| Jan. 24 | Sunny | 17° /10° | 0 mm | 4 | |
| Jan. 25 | Overcast | 16° /8° | 0.1 mm | 3 | |
| Jan. 26 | Sunny | 18° /10° | 0 mm | 4 | |
| Jan. 27 | Sunny | 18° /9° | 5.1 mm | 4 | |
| Jan. 28 | Cloudy | 16° /10° | 0 mm | 4 | |
| Jan. 29 | Overcast | 17° /10° | 0.9 mm | 3 | |
| Jan. 30 | Sunny | 18° /10° | 4.9 mm | 4 | |
| Jan. 31 | Sunny | 19° /11° | 0 mm | 4 | |
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Important Notice
Our weather forecast for San Diego in January is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the San Diego forecast closer to your planned date for the most up-to-date weather information.
Change Month
San Diego in January - FAQ
What are the expected maximum and minimum temperatures in San Diego during January?
Enjoy moderate daytime temperatures of up to 17° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in San Diego during January?
Moderate rainfall is anticipated in San Diego during January, with a total of 90.6 mm spread over approximately 7 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in San Diego during January?
The average wind speed in San Diego during January is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
January rainfall patterns in San Diego
Explore the daily rainfall trends and prepare for San Diegos January weather 💧
Typically, San Diego has 7 rainy days in January with a total of 90.6 mm of rainfall.
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