Best year time to visit Diamond Bar

General weather information about Diamond Bar

Average annual temperature is 16.8 °C

Absolute maximum temperature: 40.0 °C

Absolute minimum temperature: 0.3 °C

Number of sunny days: 260 days

Number of rainy days: 105 days

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* Weather data for Diamond Bar United States is based on climate observations for 2026 year

Diamond Bar air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)19.824.521.931.929.032.339.040.036.135.330.026.0
Average daytime temperature (°C)15.216.716.223.122.725.434.533.028.728.423.819.9
Average temperature (°C)10.310.210.915.015.918.124.624.521.420.416.213.8
Average night temperature (°C)6.95.57.510.011.613.217.118.216.614.810.79.4
Absolute minimum temperature (°C)3.00.31.95.08.110.813.015.813.98.16.26.1

Diamond Bar monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.014.014.013.012.011.010.010.0
Daylight mean duration (h)10.211.012.013.013.914.414.213.412.411.310.49.9
Daylight minimum duration (h)9.010.011.012.013.014.013.012.011.010.010.09.0
Sunshine mean duration (h)6.38.07.010.49.110.412.611.29.19.88.87.7
Precipitation (mm)30713621862870909093968
Sunny days151412262019312624272224
Rainy days16141941111056487
Snow days000000000000

Diamond Bar - weather forecast by months

Diamond Bar weather in januaryDiamond Bar weather in februaryDiamond Bar weather in marchDiamond Bar weather in aprilDiamond Bar weather in mayDiamond Bar weather in juneDiamond Bar weather in julyDiamond Bar weather in augustDiamond Bar weather in septemberDiamond Bar weather in octoberDiamond Bar weather in novemberDiamond Bar weather in december

Best time to visit Diamond Bar:

The best time to visit Diamond Bar during the most sunny months:

  • July — 12.6(h)

The largest precipitation sum in Diamond Bar is at

  • January — 307(mm)
  • February — 136(mm)
  • March — 218(mm)

    • Weather forecast in the closest to Diamond Bar admin centers

    Weather forecast in the closest towns to Diamond Bar

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    Frequently asked questions

    When is the best time to visit Diamond Bar?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Diamond Bar.
    What is the weather like in Diamond Bar?
    See average temperature, rainfall and daylight hours for Diamond Bar by month in the table above.
    How many sunny days does Diamond Bar have?
    The monthly weather statistics above show sunshine and rainfall patterns for Diamond Bar throughout the year.