Historical weather data, all-time temperature records, and monthly climate averages for Riverside, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Riverside is a mild, nearly rain-free day on average — expect a high around 72° and a low near 44°, with only an 8% shot at any precipitation. The date has swung wildly in the past, though, from a scorching 90° in 1960 down to a freezing 30° in 1970.
Riverside plays for keeps when the weather turns extreme. The city hit a brutal 116° on September 6, 2020, and bottomed out at 17° back in December 1968 — a 99-degree spread that tells you this Inland Empire city is no stranger to punishment on either end.
Riverside runs hot and dry for most of the year, peaking in late July and August when average highs reach 93–94°. If you're cold-averse, avoid January, when highs hover in the mid-60s. The wettest stretch is late January, though even then you're averaging less than half an inch per week.