San Bernardino Weather in January
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.
Rainfall in San Bernardino in January
This month experiences about 7 days of rain according to historical data, averaging 125 mm (4.9 in). The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.
Temperature in San Bernardino in January
In January, expect very high temperatures in San Bernardino, with highs of 34°C (93°F) and lows of 23°C (73°F) at night. If you're spending a lot of time outdoors, it helps to plan around the warmer part of the day. With overnight lows of 23°C (73°F), evenings and nights remain warm. Light clothing and an open window or fan can help you sleep comfortably. These temperatures represent the average, but hotter days can occur. Be prepared with light clothing and stay hydrated to manage the heat.
Sunshine in San Bernardino in January
The month enjoys around 278 hours of sunshine, creating mostly sunny days with good weather conditions.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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Paraguay, check out our San Bernardino's climate page.
San Bernardino Temperature in January
Min Temperature
23°C (73°F)
Max Temperature
34°C (93°F)
Chance of Rain
23%
Precipitation
125 mm (4.9 in)
Rainy days
7 days
Humidity
68% *
Sunshine
278 hours *
Percentage Sunshine
*
Daily Historical Temperatures
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).
Average temperatures in January
Daily Historical Precipitation
51-year average (1976-2026)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in January
Historical weather for San Bernardino in January
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.
San Bernardino historical weather extremes in January
The extremes listed below come from historical weather data collected in San Bernardino from 1976 through 2025.
- The hottest January day on record in San Bernardino reached 43°C (109°F) (January 24, 2022).
- San Bernardino experienced its chilliest January day on January 18, 1990, reaching only 20°C (68°F).
- San Bernardino registered its coldest January night on January 1, 1980, with temperatures dropping to 13°C (55°F).
Best Places in Paraguay in January
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
pleasant
tolerable
unpleasant
poor
What to Wear in San Bernardino in January
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.What To Do in San Bernardino 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 Paraguay, check out our San Bernardino's climate page.
Temperature Rainfall Sunshine Humidity
See the full San Bernardino climate overview or explore weather in Paraguay.
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