Current conditions and the National Weather Service 7-day forecast for Diamond Bar, California — temperature, rain chance, wind, radar and active alerts.
Wednesday Sep 16: a high near 78°F and a low around 59°F. Highs over the period run 78°F to 84°F.
| Day | High | Low | Precip |
|---|---|---|---|
| Wednesday Sep 16 | 78° | 59° | — |
| Thursday Sep 17 | 78° | 59° | — |
| Friday Sep 18 | 80° | 61° | — |
| Saturday Sep 19 | 84° | 62° | — |
| Sunday Sep 20 | 83° | 61° | — |
| Monday Sep 21 | 81° | 60° | — |
| Tuesday Sep 22 | 84° | — | — |