Weather in Rialto in August
Rialto, United States averages a high of 33.9°C (93°F) and low of 19.7°C (67.5°F) in August, with 2 rain days and 12.9 hours of daily sunshine. Travel score: 97.5/100 (Excellent). The best time to visit Rialto is June.
High
34°C93°F
Low
20°C67°F
🌧️
2
rain days
☀️
12.9
hrs/day sunshine
💧
48%
humidity
98— Excellent
August in Rialto is hot and dry — excellent conditions for exploring.
What are the average temperatures in Rialto?
How much does it rain in Rialto in August?
Rialto receives an average of 9.2mm of rainfall across 2 rainy days in August. The annual total is 400.2mm.
What should I pack for Rialto in August?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light, breathable clothing
Hot weather with highs around 34°C
🧢
Sun hat or cap
Protection from intense sun
🧴
Sunscreen SPF 30+
13 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Recommended
🧥
Evening jacket or cardigan
Temperature drops 14°C from day to night
Traveling to United States in August?
Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.
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Data based on 1994–2024 averages · Last updated: 2024-12-31