Ontario December Weather Averages California, United States of America

December Weather Averages for Ontario

High Temp	18°C	64°F
Low Temp	8°C	46°F
Avg Temp	12°C	53°F
Sunshine Hours	280 hours
Rainfall	83.20 mm	3.28 In
Rain days	4 days
Pressure	1018 mb	31 In

Ontario December Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	15°C / 59°F	5°C / 41°F	9°C / 48°F	256 hours	106.47 mm / 4.19 In	4 days	1018 mb / 31 In
2009	16°C / 60°F	5°C / 41°F	9°C / 49°F	260 hours	90.22 mm / 3.55 In	5 days	1017 mb / 31 In
2010	17°C / 63°F	7°C / 44°F	11°C / 52°F	257 hours	356.94 mm / 14.05 In	8 days	1017 mb / 30 In
2011	17°C / 63°F	5°C / 41°F	10°C / 50°F	344 hours	16.04 mm / 0.63 In	2 days	1020 mb / 31 In
2012	16°C / 60°F	6°C / 43°F	10°C / 50°F	281 hours	51.90 mm / 2.04 In	8 days	1017 mb / 31 In
2013	19°C / 66°F	7°C / 44°F	12°C / 53°F	339 hours	14.10 mm / 0.56 In	2 days	1019 mb / 31 In
2014	16°C / 61°F	8°C / 46°F	11°C / 52°F	262 hours	111.30 mm / 4.38 In	6 days	1018 mb / 31 In
2015	17°C / 63°F	6°C / 43°F	11°C / 52°F	330 hours	30.60 mm / 1.20 In	2 days	1018 mb / 31 In
2016	17°C / 63°F	7°C / 45°F	12°C / 53°F	289 hours	123.15 mm / 4.85 In	6 days	1018 mb / 31 In
2017	23°C / 73°F	11°C / 52°F	16°C / 61°F	347 hours	0.00 mm / 0.00 In	0 days	1020 mb / 31 In
2018	19°C / 66°F	10°C / 50°F	14°C / 57°F	308 hours	54.07 mm / 2.13 In	4 days	1019 mb / 31 In
2019	16°C / 61°F	8°C / 47°F	12°C / 53°F	211 hours	122.89 mm / 4.84 In	5 days	1018 mb / 31 In
2020	19°C / 66°F	9°C / 48°F	13°C / 56°F	316 hours	27.75 mm / 1.09 In	1 days	1020 mb / 31 In
2021	16°C / 61°F	7°C / 44°F	11°C / 51°F	202 hours	204.10 mm / 8.04 In	8 days	1016 mb / 30 In
2022	16°C / 60°F	7°C / 44°F	11°C / 51°F	196 hours	81.40 mm / 3.20 In	3 days	1018 mb / 31 In
2023	19°C / 66°F	9°C / 48°F	13°C / 56°F	249 hours	46.75 mm / 1.84 In	2 days	1018 mb / 31 In
2024	20°C / 68°F	10°C / 51°F	14°C / 58°F	293 hours	0.00 mm / 0.00 In	0 days	1020 mb / 31 In

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