Diamond Bar Weather History California, United States of America

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Past date: Past date must be from 1st Jan, 2009 onwards.

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Daily and hourly data from 1 Jan 2009 onwards.
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Sun 02 Nov, 2025 Weather in Diamond Bar

Sunrise: 07:12 AM Sunset: 05:57 PM	Moonrise: 04:07 PM Moonset: 03:50 AM	Max: 27.6 °c	Min: 12.4 °c	Avg: 19.6 °c	Precip: 0.00 mm	Max Wind: 14.8 kph

	Sun 02 0:00 am	Sun 02 3:00 am	Sun 02 6:00 am	Sun 02 9:00 am	Sun 02 12:00 pm	Sun 02 3:00 pm	Sun 02 6:00 pm	Sun 02 9:00 pm
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Temp	14.6°c	13.1°c	14.5°c	19.8°c	24.8°c	26.4°c	22.4°c	19.9°c
Wind	1.8 kmph	2.9 kmph	2.9 kmph	3.6 kmph	6.5 kmph	13.7 kmph	9.0 kmph	3.2 kmph
Precip	0.00 mm	0.00 mm	0.00 mm	0.00 mm	0.00 mm	0.00 mm	0.00 mm	0.00 mm
Cloud	65%	100%	100%	9%	21%	4%	8%	8%
Humidity	97%	99%	99%	50%	36%	40%	56%	66%
Pressure	989 mb	988 mb	990 mb	996 mb	1002 mb	1008 mb	1014 mb	1017 mb

Diamond Bar Annual Weather Averages

Month	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
January	18°C / 64°F	9°C / 47°F	13°C / 55°F	281 hours	68.42 mm / 2.69 In	4 days	1019 mb / 31 In
February	18°C / 65°F	9°C / 47°F	13°C / 55°F	251 hours	86.39 mm / 3.40 In	4 days	1017 mb / 31 In
March	19°C / 67°F	10°C / 50°F	14°C / 57°F	268 hours	67.42 mm / 2.65 In	4 days	1017 mb / 30 In
April	22°C / 72°F	12°C / 53°F	17°C / 62°F	301 hours	21.36 mm / 0.84 In	1 days	1014 mb / 30 In
May	24°C / 75°F	14°C / 57°F	18°C / 65°F	318 hours	7.13 mm / 0.28 In	1 days	1013 mb / 30 In
June	28°C / 82°F	17°C / 63°F	22°C / 71°F	339 hours	1.24 mm / 0.05 In	0 days	1011 mb / 30 In
July	31°C / 87°F	20°C / 68°F	25°C / 77°F	360 hours	2.34 mm / 0.09 In	1 days	1012 mb / 30 In
August	32°C / 89°F	21°C / 69°F	26°C / 78°F	357 hours	6.22 mm / 0.24 In	0 days	1012 mb / 30 In
September	30°C / 86°F	20°C / 68°F	24°C / 76°F	336 hours	5.45 mm / 0.21 In	1 days	1012 mb / 30 In
October	26°C / 79°F	16°C / 61°F	21°C / 69°F	314 hours	16.33 mm / 0.64 In	1 days	1014 mb / 30 In
November	22°C / 71°F	12°C / 53°F	16°C / 61°F	305 hours	22.49 mm / 0.89 In	1 days	1017 mb / 31 In
December	17°C / 63°F	9°C / 48°F	13°C / 55°F	278 hours	75.97 mm / 2.99 In	3 days	1018 mb / 31 In

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