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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.

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
15
Dry days
Average rainy days
16
Rainy days
Average snowy days
0
Snow days
Average temperatures
28°/21°
Temperatures
Average wind speed
22 km/h
Avg max wind
Average humidity
77 %
Avg humidity

San Juan in January average weather

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Temperatures trend during January in San Juan

See the weather trend as well as the moving average line
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January weather day by day

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Date Weather Temperatures Rain UV More
1 Jan. Patchy rain possible
Patchy rain possible
27° /22° 2.2 mm 6
2 Jan. Patchy rain possible
Patchy rain possible
29° /21° 0.8 mm 7
3 Jan. Moderate rain at times
Moderate rain at times
27° /21° 3.3 mm 7
4 Jan. Moderate rain at times
Moderate rain at times
27° /21° 3.1 mm 6
5 Jan. Moderate rain at times
Moderate rain at times
28° /21° 2 mm 6
6 Jan. Patchy rain possible
Patchy rain possible
28° /21° 1 mm 6
7 Jan. Moderate or heavy rain shower
Moderate or heavy rain shower
27° /21° 3 mm 6
8 Jan. Moderate or heavy rain shower
Moderate or heavy rain shower
28° /21° 4.2 mm 6
9 Jan. Patchy rain possible
Patchy rain possible
28° /21° 1.8 mm 6
10 Jan. Patchy rain possible
Patchy rain possible
29° /21° 0.3 mm 7
11 Jan. Moderate rain at times
Moderate rain at times
27° /21° 3.9 mm 6
12 Jan. Heavy rain at times
Heavy rain at times
28° /22° 2.8 mm 6
13 Jan. Patchy rain possible
Patchy rain possible
28° /21° 0.7 mm 6
14 Jan. Patchy rain possible
Patchy rain possible
28° /21° 0.6 mm 6
15 Jan. Heavy rain at times
Heavy rain at times
27° /22° 5.5 mm 6
16 Jan. Overcast
Overcast
26° /21° 1.4 mm 6
17 Jan. Overcast
Overcast
27° /22° 0.7 mm 6
18 Jan. Overcast
Overcast
27° /22° 0.5 mm 6
19 Jan. Patchy rain possible
Patchy rain possible
29° /21° 0.8 mm 6
20 Jan. Cloudy
Cloudy
30° /21° 0 mm 7
21 Jan. Partly cloudy
Partly cloudy
30° /21° 0 mm 7
22 Jan. Cloudy
Cloudy
29° /21° 0.4 mm 6
23 Jan. Cloudy
Cloudy
29° /21° 0.3 mm 7
24 Jan. Overcast
Overcast
26° /21° 6 mm 6
25 Jan. Patchy rain possible
Patchy rain possible
27° /21° 1.7 mm 6
26 Jan. Patchy rain possible
Patchy rain possible
28° /21° 1.3 mm 6
27 Jan. Patchy rain possible
Patchy rain possible
25° /21° 2.9 mm 6
28 Jan. Patchy rain possible
Patchy rain possible
27° /21° 0.6 mm 7
29 Jan. Patchy rain possible
Patchy rain possible
27° /20° 1 mm 7
30 Jan. Patchy rain possible
Patchy rain possible
28° /21° 0.8 mm 6
31 Jan. Patchy rain possible
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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Location coordinates Where is San Juan?

Get accurate weather forecasts for San Juan, located at latitude 18.466 and longitude -66.106. Stay updated with localized weather information tailored for San Juan.

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