San Juan Weather in January
January in San Juan sees daytime temperatures around 28°C (82°F) and lows of 24°C (75°F) at night. The perfect weather makes it a good time to visit.
Rainfall in San Juan in January
Historically, January sees about 14 days of rain, with a monthly average of 59 mm (2.3 in). Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.
Temperature in San Juan in January
Weather in San Juan is at its perfect in January. Highs reach 28°C (82°F), while nights settle around 24°C (75°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights are warm at 24°C (75°F). It's worth making sure your accommodation has decent ventilation or air conditioning.
Sunshine in San Juan in January
The city usually sees around 239 hours of sunlight, indicating many sunny days — a great month for sightseeing.
Average water temperature in January
The water temperature is 27°C (81°F), which most people find very comfortable. A good month for swimming and water sports.If you favor pleasant temperatures and minimal rainfall, January is one of the best months to visit San Juan.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Trinidad & Tobago, check out our San Juan's climate page.
San Juan Temperature in January
Min Temperature
24°C (75°F)
Max Temperature
28°C (82°F)
Water Temperature
27°C (81°F) *
Chance of Rain
45%
Precipitation
59 mm (2.3 in)
Rainy days
14 days
Humidity
81% *
Sunshine
239 hours *
Percentage Sunshine
*
Daily Historical Temperatures
51-year average (1976-2026)
Based on our historical records, temperatures in San Juan typically stay consistent throughout January, with daily highs averaging around 28°C (82°F). Nights are warm, with lows around 22°C (72°F).
Average temperatures in January
Historical weather for San Juan in January
Browse day-by-day weather records for San Juan spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
San Juan historical weather extremes in January
Based on 20 years of weather observations in San Juan between 2005 and 2025, these are the recorded extremes.
- On January 4, 2015, temperatures climbed to 35°C (95°F), marking the warmest January day on record.
- The coldest January day was on January 17, 2005, with a maximum of 25°C (77°F).
- The coldest night in January in San Juan was on January 28, 2023, with a minimum of 19°C (66°F).
Best Places in Trinidad & Tobago in January
Find out more about the weather in Trinidad & Tobago and which places have the best travel conditions in this month. See all of Trinidad & Tobago in January →
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What to Wear in San Juan in January
Warm weather calls for comfortable, breathable clothing in January. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Rain is likely on several days, so bring a good rain jacket. With water temperatures around 27°C (81°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in San Juan in January
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Trinidad & Tobago, check out our San Juan's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full San Juan climate overview or explore weather in Trinidad & Tobago.
