San Juan
January
Weather in San Juan for January 2025
Your guide to San Juan weather in January - trends and predictions
In general, the average temperature in San Juan at the beginning of January is 27.6 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 27 °C by the end of January.
Expect significant rainfall in San Juan during January, with an average of 16 rainy days.
Is January a good time to visit San Juan? check out the best time to travel to San Juan page.
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15
Dry days
16
Rainy days
0
Snow days
28°/21°
Temperatures
22 km/h
Avg max wind
77 %
Avg humidity
San Juan in January average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  27° | 2 29° | 3  27° | 4 27° | 5 28° | ||
| 6 28° | 7 27° | 8 28° | 9 28° | 10 29° | 11 27° | 12  28° |
| 13 28° | 14 28° | 15 27° | 16  26° | 17 27° | 18 27° | 19 29° |
| 20  30° | 21  30° | 22 29° | 23 29° | 24 26° | 25 27° | 26 28° |
| 27 25° | 28 27° | 29 27° | 30 28° | 31 27° |
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Temperatures trend during January in San Juan
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 |
|---|---|---|---|---|---|
| 1 Jan. | Patchy rain possible | 27° /22° | 2.2 mm | 6 | |
| 2 Jan. | Patchy rain possible | 29° /21° | 0.8 mm | 7 | |
| 3 Jan. | Moderate rain at times | 27° /21° | 3.3 mm | 7 | |
| 4 Jan. | Moderate rain at times | 27° /21° | 3.1 mm | 6 | |
| 5 Jan. | Moderate rain at times | 28° /21° | 2 mm | 6 | |
| 6 Jan. | Patchy rain possible | 28° /21° | 1 mm | 6 | |
| 7 Jan. | Moderate or heavy rain shower | 27° /21° | 3 mm | 6 | |
| 8 Jan. | Moderate or heavy rain shower | 28° /21° | 4.2 mm | 6 | |
| 9 Jan. | Patchy rain possible | 28° /21° | 1.8 mm | 6 | |
| 10 Jan. | Patchy rain possible | 29° /21° | 0.3 mm | 7 | |
| 11 Jan. | Moderate rain at times | 27° /21° | 3.9 mm | 6 | |
| 12 Jan. | Heavy rain at times | 28° /22° | 2.8 mm | 6 | |
| 13 Jan. | Patchy rain possible | 28° /21° | 0.7 mm | 6 | |
| 14 Jan. | Patchy rain possible | 28° /21° | 0.6 mm | 6 | |
| 15 Jan. | Heavy rain at times | 27° /22° | 5.5 mm | 6 | |
| 16 Jan. | Overcast | 26° /21° | 1.4 mm | 6 | |
| 17 Jan. | Overcast | 27° /22° | 0.7 mm | 6 | |
| 18 Jan. | Overcast | 27° /22° | 0.5 mm | 6 | |
| 19 Jan. | Patchy rain possible | 29° /21° | 0.8 mm | 6 | |
| 20 Jan. | Cloudy | 30° /21° | 0 mm | 7 | |
| 21 Jan. | Partly cloudy | 30° /21° | 0 mm | 7 | |
| 22 Jan. | Cloudy | 29° /21° | 0.4 mm | 6 | |
| 23 Jan. | Cloudy | 29° /21° | 0.3 mm | 7 | |
| 24 Jan. | Overcast | 26° /21° | 6 mm | 6 | |
| 25 Jan. | Patchy rain possible | 27° /21° | 1.7 mm | 6 | |
| 26 Jan. | Patchy rain possible | 28° /21° | 1.3 mm | 6 | |
| 27 Jan. | Patchy rain possible | 25° /21° | 2.9 mm | 6 | |
| 28 Jan. | Patchy rain possible | 27° /21° | 0.6 mm | 7 | |
| 29 Jan. | Patchy rain possible | 27° /20° | 1 mm | 7 | |
| 30 Jan. | Patchy rain possible | 28° /21° | 0.8 mm | 6 | |
| 31 Jan. | Patchy rain possible | 27° /22° | 3.6 mm | 6 | |
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Important Notice
Our weather forecast for San Juan 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 Juan forecast closer to your planned date for the most up-to-date weather information.
San Juan in January - FAQ
What are the expected maximum and minimum temperatures in San Juan during January?
During January, expect a variety of temperatures with highs around 28° and lows near 21°, suitable for diverse activities and preferences.
How much rainfall should be expected in San Juan during January?
Significant rainfall exceeding 114.2 mm is expected in San Juan during January, occurring over more than 16 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in San Juan during January?
The average wind speed in San Juan during January is 22 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to San Juan in January?
As you prepare for your trip to San Juan in January, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in San Juan, during January, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Lightweight Clothing: T-shirts, blouses, shorts, skirts
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Umbrellas/Raincoats: For rainy days
- Personal Items
- Sunscreen: High SPF for sunny destinations
- Lip Balm with SPF: To protect against chapped lips
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