San Diego
January
Weather in San Diego for January 2026
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 remain steady, reaching an average of 16 °F by the end of January.
San Diego in January brings notable rainfall, with an average of 16 rainy days and a total precipitation of 81.5 mm.
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Temperatures
Rain 🌧️
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15
Dry days
16
Rainy days
0
Snow days
16°/10°
Temperatures
16 km/h
Avg max wind
58 %
Avg humidity
San Diego Weather January
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| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  16° | 2  16° | 3 15° | ||||
| 4  15° | 5 18° | 6  17° | 7  15° | 8 17° | 9 17° | 10 17° |
| 11  16° | 12 17° | 13 17° | 14 17° | 15 17° | 16 16° | 17 14° |
| 18 15° | 19 14° | 20 16° | 21 16° | 22 16° | 23 18° | 24 17° |
| 25 15° | 26 17° | 27 17° | 28 16° | 29 15° | 30 16° | 31 16° |
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Temperatures trend during January in San Diego
See the weather trend as well as the moving average line
January weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Jan. 1 | Moderate or heavy rain shower | 16° /10° | 9.5 mm | 4 | |
| Jan. 2 | Partly cloudy | 16° /11° | 0.7 mm | 4 | |
| Jan. 3 | Moderate rain at times | 15° /11° | 4.6 mm | 3 | |
| Jan. 4 | Patchy rain possible | 15° /11° | 1.1 mm | 4 | |
| Jan. 5 | Moderate or heavy rain shower | 18° /10° | 4.8 mm | 5 | |
| Jan. 6 | Sunny | 17° /9° | 0 mm | 5 | |
| Jan. 7 | Overcast | 15° /11° | 1.7 mm | 3 | |
| Jan. 8 | Partly cloudy | 17° /10° | 0 mm | 5 | |
| Jan. 9 | Sunny | 17° /9° | 0.1 mm | 5 | |
| Jan. 10 | Moderate or heavy rain shower | 17° /10° | 7.2 mm | 5 | |
| Jan. 11 | Cloudy | 16° /10° | 0.5 mm | 4 | |
| Jan. 12 | Sunny | 17° /8° | 0 mm | 5 | |
| Jan. 13 | Overcast | 17° /8° | 0 mm | 5 | |
| Jan. 14 | Moderate or heavy rain shower | 17° /10° | 9.5 mm | 5 | |
| Jan. 15 | Moderate rain at times | 17° /9° | 4.1 mm | 5 | |
| Jan. 16 | Moderate or heavy rain shower | 16° /10° | 8.9 mm | 4 | |
| Jan. 17 | Patchy rain possible | 14° /10° | 1.9 mm | 4 | |
| Jan. 18 | Partly cloudy | 15° /10° | 0 mm | 4 | |
| Jan. 19 | Patchy rain possible | 14° /9° | 0.3 mm | 3 | |
| Jan. 20 | Patchy rain possible | 16° /11° | 4.5 mm | 4 | |
| Jan. 21 | Sunny | 16° /9° | 2.4 mm | 5 | |
| Jan. 22 | Sunny | 16° /9° | 4.5 mm | 4 | |
| Jan. 23 | Sunny | 18° /11° | 0.6 mm | 5 | |
| Jan. 24 | Sunny | 17° /9° | 0 mm | 5 | |
| Jan. 25 | Overcast | 15° /9° | 0.1 mm | 4 | |
| Jan. 26 | Sunny | 17° /11° | 0 mm | 5 | |
| Jan. 27 | Sunny | 17° /10° | 6.8 mm | 5 | |
| Jan. 28 | Cloudy | 16° /11° | 0 mm | 4 | |
| Jan. 29 | Overcast | 15° /12° | 1.2 mm | 4 | |
| Jan. 30 | Moderate or heavy rain shower | 16° /11° | 6.5 mm | 4 | |
| Jan. 31 | Partly cloudy | 16° /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.
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 16° 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 81.5 mm spread over approximately 16 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 16 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 💧
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