Irvine weather by month

Warmest month

August

85°F (30°C) average high

Coolest month

January

49°F (9°C) average low

Wettest month

October

3.5 in (89 mm) of rain

Driest month

September

0.3 in (7 mm) of rain

Average temperature and rainfall in Irvine by month

Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.

Month	Avg high	Avg low	Record low / high	Rainfall	Humidity	Wind
January	68°F	49°F	29°F / 89°F	2.4 in	65%	5 mph
February	69°F	49°F	38°F / 87°F	2.1 in	62%	5 mph
March	70°F	52°F	38°F / 85°F	2 in	69%	5 mph
April	72°F	54°F	45°F / 93°F	0.6 in	67%	6 mph
May	73°F	57°F	49°F / 100°F	0.9 in	71%	6 mph
June	78°F	61°F	51°F / 90°F	0.6 in	75%	6 mph
July	84°F	65°F	55°F / 93°F	0.3 in	72%	6 mph
August	85°F	66°F	60°F / 101°F	0.3 in	72%	5 mph
September	85°F	65°F	55°F / 106°F	0.3 in	69%	5 mph
October	81°F	60°F	47°F / 102°F	3.5 in	64%	4 mph
November	75°F	53°F	37°F / 87°F	0.9 in	62%	4 mph
December	67°F	50°F	39°F / 81°F	2 in	66%	4 mph

Frost and snow-likely months in Irvine

No month in Irvine averages a night of 36°F (2°C) or below. The coldest month is January with an average low of 49°F (9°C) and a record low of 29°F (-2°C), so frost is rare and snow is very unlikely.

These records carry temperature and precipitation, not snowfall totals.

Best time to visit Irvine

The most comfortable time to visit Irvine is generally May to June and November, balancing mild daytime temperatures against the driest stretch of the year. The city has a moderate seasonal swing and rain concentrates around October, totalling about 15.8 in (402 mm) a year.

Travellers who prefer heat should aim for August, when highs average 85°F (30°C). October is the month to avoid if rain would spoil your plans — it averages 3.5 in (89 mm), roughly 12× the rainfall of the driest month (September).

Irvine climate: your questions

Will it snow in Irvine this year?

No: the coldest month in Irvine is January with an average low of 49°F (9°C) and a record low of 29°F (-2°C), so snow is very unlikely. What is falling now: Irvine weather today.

When is the best time to visit Irvine?

May to June and November are the most comfortable months in Irvine, with highs near 75°F (24°C). August is the warmest month, averaging 85°F (30°C) by day; October is the wettest, with 3.5 in (89 mm); and January is the coolest, with lows near 49°F (9°C). What it is doing today: Irvine weather today.

Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Irvine forecast for what is happening now.