Historical Weather Records & Monthly Climate for Diamond Bar, CA
All-Time High
115°F
All-Time Low
22°F
Max Daily Snow
3"
Max Wind Gust
58 mph
Monthly Climate Averages
Based on 30 years of historical data (1994 - 2023)
| Month | High (°F) | Low (°F) | Precip (in) | Snow (in) |
|---|---|---|---|---|
| January | 64° | 43° | 3.34" | 0.01" |
| February | 64° | 44° | 3.4" | 0.16" |
| March | 68° | 47° | 2.33" | 0.02" |
| April | 72° | 50° | 1.05" | 0.01" |
| May | 75° | 55° | 0.47" | 0 |
| June | 82° | 59° | 0.09" | 0 |
| July | 88° | 64° | 0.08" | 0 |
| August | 90° | 65° | 0.16" | 0 |
| September | 87° | 63° | 0.33" | 0 |
| October | 79° | 57° | 0.75" | 0 |
| November | 71° | 49° | 1.12" | 0 |
| December | 63° | 43° | 2.65" | 0.03" |
Historical Weather Extremes
Based on 80+ years of archive data (1940 - 2024)
🔥
Longest Heatwave
37 Days
1942
Consecutive days ≥ 90°F
🧊
Deepest Freeze
0 Days
N/A
Consecutive days ≤ 32°F
🏜️
Longest Drought
174 Days
2003
Consecutive days w/o rain
☔
Wettest Month
18.35"
January 1993
Most rainfall in one month
⛄
Snowiest Month
4.8"
January 1949
Most snowfall in one month
More Historical Climate Data for Cities in
CA