San Bernardino in January sees very high temperatures, with highs around 34°C (93°F) and overnight lows of 23°C (73°F). Rainfall is fairly high at around 125 mm (4.9 in) on average, so pack waterproofs just in case.
January in San Bernardino can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.
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Pick a month to see the average temperature, rainfall and sunshine in San Bernardino - and find the best time to visit.
51-year average (1976-2026)
Based on our historical records, temperatures in San Bernardino typically stay consistent throughout January, with daily highs averaging around 34°C (93°F). Nights are warm, with lows around 23°C (73°F).
51-year average (1976-2026)
Average daily rainfall for each day of the month based on long-term records.
Browse day-by-day weather records for San Bernardino spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
The extremes listed below come from historical weather data collected in San Bernardino from 1976 through 2025.
Find out more about the weather in Paraguay and which places have the best travel conditions in this month. See all of Paraguay in January →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
Hot weather in January means keeping cool is the priority. Loose-fitting clothes in natural fabrics work best. Pack plenty of shorts, tank tops, and breathable shirts. Don't forget a hat, swimwear, and comfortable sandals. Prepare for significant rainfall with proper waterproof clothing and shoes. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity
See the full San Bernardino climate overview or explore weather in Paraguay.
Where to go in January - average daytime high across popular destinations.
San Bernardino
34°C (93°F) Areguá34°C (93°F) Asuncion34°C (93°F) Luque34°C (93°F) Encarnación
33°C (91°F) Ybycuí33°C (91°F) Villarrica34°C (93°F) Ciudad del Este
33°C (91°F) Need travel inspiration? Check out our bucket list articles and be inspired.
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