Typically, you can expect that the weather in Rancho Cucamonga right-through June is 20. High temperatures are around 28 and low of 15. The table below has some further insights:
| Month | Degrees Celsius |
|---|---|
| Temperature | 20 |
| High Temperature | 28 |
| Low Temperature | 15 |
| Sunshine Per Day | 10 |
Useful Links: Rancho Cucamonga Weather: Average Weather & Yearly Climate