Diamond Bar, CA weather
Today, hourly and 7-day forecast, sunrise and sunset, and the normal climate month by month
Weather in Diamond Bar now
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Diamond Bar weather by the hour
Diamond Bar weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Diamond Bar.
This week in Diamond Bar
Sunrise, sunset and moon in Diamond Bar
What is the weather usually like in Diamond Bar?
Köppen climate classification, calculated from the 1991–2020 normals
- Augustwarmest month · 94°F average high
- Decembercoldest month · 43°F average low
- 14.5 inprecipitation per year · 368 mm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Diamond Bar: April–May and October–November, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station POMONA/FAIRPLEX, CA US (USC00047050), adjusted for the elevation of Diamond Bar.
Diamond Bar weather month by month
Sunrise and sunset in Diamond Bar through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 6:54 AM | 5:06 PM | 10 h 11 min |
| February | 6:34 AM | 5:36 PM | 11 h 2 min |
| March | 6:59 AM | 7:00 PM | 12 h 0 min |
| April | 6:18 AM | 7:23 PM | 13 h 5 min |
| May | 5:48 AM | 7:47 PM | 13 h 59 min |
| June | 5:38 AM | 8:05 PM | 14 h 27 min |
| July | 5:50 AM | 8:04 PM | 14 h 14 min |
| August | 6:11 AM | 7:39 PM | 13 h 27 min |
| September | 6:33 AM | 6:59 PM | 12 h 25 min |
| October | 6:55 AM | 6:18 PM | 11 h 23 min |
| November | 6:22 AM | 4:49 PM | 10 h 26 min |
| December | 6:48 AM | 4:45 PM | 9 h 57 min |
Times for the 15th of each month, local time (America/Los Angeles).
What is the weather like in Diamond Bar?
Diamond Bar has a hot semi-arid climate. The warmest month is August, with an average high of 94°F (34°C), and the coldest is December, with average lows of 43°F (6°C).
It gets about 14.5 inches (368 mm) of precipitation a year. The wettest month is February and the driest is July.
The best time to visit Diamond Bar is April–May and October–November. At 696 ft of elevation, nights are mild most of the year. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
More about Diamond Bar
Weather in towns near Diamond Bar
Questions about the weather in Diamond Bar
What is the hottest month in Diamond Bar?
August, with an average high of 94°F (34°C).
What is the coldest month in Diamond Bar?
December, with an average low of 43°F (6°C).
How much does it rain in Diamond Bar?
About 14.5 inches (368 mm) a year; the wettest month is February.
Does it snow in Diamond Bar?
Snow is very rare or not recorded at the nearest weather station.
When is the best time to visit Diamond Bar?
April–May and October–November, when temperatures are most pleasant and rainy days are fewer.
What climate does Diamond Bar have?
Hot semi-arid (Köppen BSh).
What is the weather like in Diamond Bar in November?
Highs average 75°F and lows 48°F, with about 0.7 inches of precipitation.
What time is sunrise in Diamond Bar?
Around 6:22 AM in mid-November, and sunset around 4:49 PM. Today’s exact times are shown above.
Where does this Diamond Bar weather forecast come from?
From the National Weather Service (NOAA), the official U.S. weather agency, for the exact coordinates of Diamond Bar.
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