Diamond Bar December Weather Averages California, United States of America

December Weather Averages for Diamond Bar

High Temp	17°C	63°F
Low Temp	9°C	48°F
Avg Temp	13°C	55°F
Sunshine Hours	278 hours
Rainfall	75.97 mm	2.99 In
Rain days	3 days
Pressure	1018 mb	31 In

Diamond Bar December Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	14°C / 58°F	6°C / 43°F	10°C / 49°F	253 hours	96.89 mm / 3.81 In	4 days	1018 mb / 31 In
2009	14°C / 58°F	6°C / 43°F	10°C / 50°F	261 hours	82.56 mm / 3.25 In	4 days	1017 mb / 31 In
2010	16°C / 60°F	8°C / 46°F	11°C / 52°F	244 hours	316.09 mm / 12.44 In	8 days	1017 mb / 30 In
2011	16°C / 60°F	6°C / 42°F	10°C / 50°F	347 hours	21.62 mm / 0.85 In	2 days	1020 mb / 31 In
2012	14°C / 58°F	7°C / 45°F	10°C / 50°F	284 hours	42.80 mm / 1.69 In	5 days	1017 mb / 31 In
2013	18°C / 64°F	7°C / 45°F	12°C / 53°F	333 hours	11.00 mm / 0.43 In	2 days	1019 mb / 31 In
2014	16°C / 60°F	8°C / 47°F	12°C / 53°F	271 hours	100.75 mm / 3.97 In	6 days	1018 mb / 31 In
2015	17°C / 63°F	7°C / 44°F	12°C / 53°F	343 hours	29.90 mm / 1.18 In	2 days	1018 mb / 31 In
2016	17°C / 63°F	8°C / 47°F	12°C / 54°F	273 hours	110.63 mm / 4.36 In	5 days	1019 mb / 31 In
2017	23°C / 73°F	12°C / 53°F	17°C / 62°F	340 hours	0.10 mm / 0.00 In	0 days	1020 mb / 31 In
2018	19°C / 66°F	11°C / 51°F	14°C / 58°F	311 hours	62.10 mm / 2.44 In	3 days	1019 mb / 31 In
2019	17°C / 62°F	9°C / 49°F	13°C / 55°F	226 hours	140.70 mm / 5.54 In	5 days	1018 mb / 31 In
2020	20°C / 68°F	11°C / 51°F	15°C / 58°F	308 hours	23.10 mm / 0.91 In	1 days	1019 mb / 31 In
2021	16°C / 61°F	9°C / 48°F	12°C / 53°F	209 hours	159.70 mm / 6.29 In	8 days	1016 mb / 30 In
2022	16°C / 61°F	8°C / 47°F	12°C / 53°F	169 hours	55.50 mm / 2.19 In	2 days	1018 mb / 31 In
2023	19°C / 66°F	12°C / 53°F	15°C / 59°F	246 hours	55.90 mm / 2.20 In	1 days	1018 mb / 31 In
2024	20°C / 68°F	11°C / 52°F	15°C / 59°F	285 hours	3.06 mm / 0.12 In	1 days	1020 mb / 31 In

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