San Diego County
January
Weather in San Diego County for January 2025
Your guide to San Diego County weather in January - trends and predictions
In general, the average temperature in San Diego County at the beginning of January is 15.6 °F. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 17.7 °F by the end of January.
Precipitation in San Diego County during January is a rare event, with an average of fewer than 2 rainy days.
- New! Chat with our AI weatherman - it’s amazing and free.
30
Dry days
1
Rainy days
0
Snow days
17°/10°
Temperatures
17 km/h
Avg max wind
61 %
Avg humidity
San Diego County in January average weather
Move between months or click on a day
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  15° | 2  15° | 3 15° | 4 16° | 5 16° | ||
| 6  16° | 7  16° | 8  16° | 9 17° | 10 16° | 11 16° | 12 17° |
| 13 17° | 14 15° | 15 16° | 16 16° | 17 15° | 18 17° | 19 15° |
| 20 16° | 21  16° | 22 15° | 23 16° | 24 17° | 25 16° | 26 20° |
| 27 20° | 28 18° | 29 17° | 30 17° | 31 16° |
You can click on date
Access San Diego County weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during January in San Diego County
See the weather trend as well as the moving average line
January weather day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Jan. 1 | Moderate or heavy rain shower | 15° /12° | 14.3 mm | 4 | |
| Jan. 2 | Patchy rain possible | 15° /12° | 1 mm | 4 | |
| Jan. 3 | Moderate rain at times | 15° /12° | 6.9 mm | 4 | |
| Jan. 4 | Patchy rain possible | 16° /12° | 1.7 mm | 5 | |
| Jan. 5 | Moderate or heavy rain shower | 16° /11° | 7.2 mm | 4 | |
| Jan. 6 | Cloudy | 16° /11° | 0 mm | 5 | |
| Jan. 7 | Overcast | 16° /11° | 0.8 mm | 4 | |
| Jan. 8 | Partly cloudy | 16° /10° | 0 mm | 5 | |
| Jan. 9 | Patchy rain possible | 17° /11° | 0.2 mm | 5 | |
| Jan. 10 | Moderate or heavy rain shower | 16° /11° | 10.8 mm | 5 | |
| Jan. 11 | Cloudy | 16° /11° | 0.7 mm | 4 | |
| Jan. 12 | Cloudy | 17° /11° | 0 mm | 5 | |
| Jan. 13 | Overcast | 17° /11° | 0 mm | 5 | |
| Jan. 14 | Moderate or heavy rain shower | 15° /12° | 14.3 mm | 4 | |
| Jan. 15 | Moderate rain at times | 16° /12° | 6.2 mm | 4 | |
| Jan. 16 | Moderate or heavy rain shower | 16° /12° | 13.3 mm | 4 | |
| Jan. 17 | Patchy rain possible | 15° /11° | 2.9 mm | 4 | |
| Jan. 18 | Partly cloudy | 17° /11° | 0 mm | 5 | |
| Jan. 19 | Patchy rain possible | 15° /11° | 0.4 mm | 4 | |
| Jan. 20 | Patchy rain possible | 16° /12° | 6.7 mm | 4 | |
| Jan. 21 | Sunny | 16° /11° | 3.5 mm | 5 | |
| Jan. 22 | Sunny | 15° /11° | 6.8 mm | 4 | |
| Jan. 23 | Sunny | 16° /10° | 0.9 mm | 5 | |
| Jan. 24 | Sunny | 17° /10° | 0 mm | 5 | |
| Jan. 25 | Overcast | 16° /10° | 0.1 mm | 4 | |
| Jan. 26 | Sunny | 20° /11° | 0 mm | 6 | |
| Jan. 27 | Sunny | 20° /11° | 0 mm | 6 | |
| Jan. 28 | Cloudy | 18° /12° | 0.1 mm | 5 | |
| Jan. 29 | Patchy rain possible | 17° /13° | 1.8 mm | 4 | |
| Jan. 30 | Moderate or heavy rain shower | 17° /12° | 9.8 mm | 5 | |
| Jan. 31 | Sunny | 16° /12° | 0.1 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for San Diego County 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 County forecast closer to your planned date for the most up-to-date weather information.
San Diego County in January - FAQ
What are the expected maximum and minimum temperatures in San Diego County 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 County during January?
Significant rainfall exceeding 220.6 mm is expected in San Diego County during January, occurring over more than 1 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in San Diego County during January?
The average wind speed in San Diego County during January is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
Top locations in San Diego County
Select a location for an accurate weather forecast
More Locations Quick links
You are here
Where is San Diego County?Get accurate weather forecasts for San Diego County, located at latitude 32.716 and longitude -117.165. Stay updated with localized weather information tailored for San Diego County.
Found a mistake?
We appreciate your attention to details. Tell us here.