April in San Bernardino averages 30°C (86°F) during the day and 19°C (66°F) at night. Quite a bit of rainfall is typical this month, with around 153 mm (6 in) on average. An umbrella is a good idea.
If you prefer enjoying temperate temperatures and rain-free days, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
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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.
50-year average (1976-2025)
Based on our historical records, temperatures in San Bernardino typically drop from around 30°C (86°F) at the start of April to approximately 27°C (81°F) by the end. Nights are pleasant, with lows typically ranging from 17°C (63°F) to 21°C (70°F).
50-year average (1976-2025)
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.
According to our 50 years of weather records for San Bernardino, the following extremes were recorded between 1976 and 2026.
Find out more about the weather in Paraguay and which places have the best travel conditions in this month. See all of Paraguay in April →
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).
Warm temperatures in April make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.
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 April - average daytime high across popular destinations.
Villarrica
29°C (84°F) Areguá
30°C (86°F) San Bernardino30°C (86°F) Luque30°C (86°F) Asuncion30°C (86°F) Ciudad del Este29°C (84°F) Encarnación29°C (84°F) Ybycuí29°C (84°F) Need travel inspiration? Check out our bucket list articles and be inspired.
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