Diamond Bar Weather History

California, United States of America

Weather on a past date in Diamond Bar

Any date from 1 January 2009 to yesterday.

Sun 11 Oct, 2026 Weather in Diamond Bar

Sunrise: 06:53 AM
Sunset: 06:22 PM		Moonrise: 08:01 AM
Moonset: 06:47 PM		Max:
21.0 °c		Min:
17.8 °c		Avg:
19.6 °c		Precip:
18.10 mm		Max Wind:
21.2 kph
 
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IconModerate or heavy rain showerHeavy rain at timesModerate or heavy rain showerModerate or heavy rain showerPatchy rain possibleOvercastOvercastPatchy rain possible
Temp20.9°c19.5°c20.1°c19.7°c20.2°c20.4°c19.1°c18.4°c
Wind6.5 kmph12.6 kmph8.9 kmph13.7 kmph20.0 kmph16.6 kmph8.6 kmph8.6 kmph
Precip1.80 mm1.20 mm2.60 mm2.10 mm0.30 mm0.00 mm0.00 mm0.10 mm
Cloud100%100%100%100%100%98%100%90%
Humidity60%76%78%82%64%55%60%64%
Pressure998 mb995 mb998 mb1002 mb1005 mb1006 mb1008 mb1009 mb

Diamond Bar Annual Weather Averages

MonthHigh TempLow TempAvg TempSunshine HoursRainfallRain daysPressure
January18°C / 64°F9°C / 48°F13°C / 55°F277 hours81.65 mm / 3.21 In4 days1019 mb / 31 In
February18°C / 65°F9°C / 48°F13°C / 55°F248 hours100.40 mm / 3.95 In4 days1017 mb / 31 In
March20°C / 68°F10°C / 50°F15°C / 58°F271 hours63.67 mm / 2.51 In3 days1016 mb / 30 In
April22°C / 72°F12°C / 53°F17°C / 62°F300 hours22.05 mm / 0.87 In2 days1014 mb / 30 In
May24°C / 75°F14°C / 57°F18°C / 65°F321 hours7.38 mm / 0.29 In1 days1013 mb / 30 In
June28°C / 82°F17°C / 62°F22°C / 71°F339 hours1.19 mm / 0.05 In0 days1011 mb / 30 In
July31°C / 88°F20°C / 68°F25°C / 77°F362 hours2.51 mm / 0.10 In1 days1012 mb / 30 In
August32°C / 89°F21°C / 69°F26°C / 78°F357 hours5.89 mm / 0.23 In0 days1012 mb / 30 In
September30°C / 86°F20°C / 68°F24°C / 76°F334 hours8.55 mm / 0.34 In1 days1012 mb / 30 In
October26°C / 79°F16°C / 61°F21°C / 69°F314 hours16.33 mm / 0.64 In1 days1014 mb / 30 In
November22°C / 71°F12°C / 53°F16°C / 61°F299 hours36.92 mm / 1.45 In2 days1017 mb / 31 In
December17°C / 63°F9°C / 48°F13°C / 55°F277 hours94.47 mm / 3.72 In3 days1018 mb / 31 In

Need more than one day of Diamond Bar history?

Download historical weather for Diamond Bar, or any other location, in CSV from January 2009 onwards. Ideal for research, insurance, energy, agriculture and machine-learning projects.

  • Historical weatherDaily and hourly interval data.
  • Yearly monthly averagesMonthly averages for every year since 2009.
  • Monthly climate averagesLong-term climate normals by month.
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Weather history near Diamond Bar

Region

California

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Diamond Bar weather history: common questions

How far back does Diamond Bar weather history go?

Hourly historical weather is available from 1 January 2009. Choose a date above, or pick a month at the top of the page for long-term averages.

Can I download Diamond Bar historical weather as a file?

Yes. Buy historical weather data as daily or hourly CSV, yearly monthly averages or monthly climate averages. A free sample download is available.

Is there an API for historical weather?

Yes. The WeatherAPI.com History API returns hourly weather for any past date from 2010, as JSON or XML. Get a free API key.

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