Riverside, CA Weather by Month and Climate Averages

How much rain does Riverside get?

Riverside gets 9.4 in of precipitation in an average year, spread over about 35 days with measurable rain. That is fewer rainy days than 90% of the US.

February is the wettest month, with 2.4 in. June is the driest, with 0.0 in. February has the most rainy days, about 7.

The longest dry spell in the last five years lasted 201 days, to November 22, 2024.

See where Riverside ranks: rainiest cities in the US, US cities with the most rainy days, rainiest cities in California.

Riverside weather by month

Riverside weather in January

In January, Riverside averages a high of 69°F and a low of 43°F. It gets 2.3 in of precipitation over about 5 rainy days. The sun is out about 53% of daylight hours. The January record high is 101°F (2003) and the record low is 24°F (2007). January is one of the most comfortable months to visit.

Riverside weather in February

In February, Riverside averages a high of 68°F and a low of 44°F. It gets 2.4 in of precipitation over about 7 rainy days. The sun is out about 60% of daylight hours. The February record high is 93°F (2026) and the record low is 30°F (2002).

Riverside weather in March

In March, Riverside averages a high of 72°F and a low of 47°F. It gets 1.2 in of precipitation over about 5 rainy days. The sun is out about 46% of daylight hours. The March record high is 102°F (2026) and the record low is 30°F (2002). March is one of the most comfortable months to visit.

Riverside weather in April

In April, Riverside averages a high of 76°F and a low of 49°F. It gets 0.6 in of precipitation over about 4 rainy days. The sun is out about 58% of daylight hours. The April record high is 102°F (2004) and the record low is 32°F (1999). April is one of the most comfortable months to visit.

Riverside weather in May

In May, Riverside averages a high of 81°F and a low of 55°F. It gets 0.2 in of precipitation over about 2 rainy days. The sun is out about 63% of daylight hours. The May record high is 105°F (2003) and the record low is 39°F (2003).

Riverside weather in June

In June, Riverside averages a high of 87°F and a low of 59°F. It gets 0.0 in of precipitation over about 0 rainy days. The sun is out about 73% of daylight hours. The June record high is 114°F (2016) and the record low is 43°F (1999).

Riverside weather in July

In July, Riverside averages a high of 94°F and a low of 64°F. It gets 0.1 in of precipitation over about 1 rainy days. The sun is out about 85% of daylight hours. The July record high is 118°F (2018) and the record low is 52°F (2001).

Riverside weather in August

In August, Riverside averages a high of 95°F and a low of 64°F. It gets 0.0 in of precipitation over about 1 rainy days. The sun is out about 83% of daylight hours. The August record high is 112°F (2017) and the record low is 53°F (1999).

Riverside weather in September

In September, Riverside averages a high of 91°F and a low of 61°F. It gets 0.1 in of precipitation over about 1 rainy days. The sun is out about 78% of daylight hours. The September record high is 117°F (2020) and the record low is 49°F (2005).

Riverside weather in October

In October, Riverside averages a high of 83°F and a low of 55°F. It gets 0.3 in of precipitation over about 2 rainy days. The sun is out about 74% of daylight hours. The October record high is 107°F (2012) and the record low is 41°F (2006).

Riverside weather in November

In November, Riverside averages a high of 75°F and a low of 47°F. It gets 0.6 in of precipitation over about 4 rainy days. The sun is out about 68% of daylight hours. The November record high is 100°F (2010) and the record low is 27°F (2004). November is one of the most comfortable months to visit.

Riverside weather in December

In December, Riverside averages a high of 67°F and a low of 42°F. It gets 1.5 in of precipitation over about 5 rainy days. The sun is out about 51% of daylight hours. The December record high is 89°F (2021) and the record low is 25°F (1998). December is one of the most comfortable months to visit.

Sunshine, humidity and wind in Riverside

July is the sunniest month in Riverside, with sunshine about 85% of daylight hours. March is the cloudiest, at 46%. Over the year the sun shines about 66% of daylight hours. Riverside is sunnier than 93% of the US.

Humidity peaks in March at 58% and is lowest in November at 37%.

Wind averages 5 mph over the year, and June is the windiest month at 6 mph.

Riverside has about 95 days a year above 90°F. Riverside is hotter than 91% of the US.

Thunderstorms occur on about 5 days a year.

See where Riverside ranks: sunniest cities in the US, cloudiest cities in the US, hottest cities in the US.

Riverside weather records

The hottest temperature on record at the Riverside station is 118°F, on July 6, 2018. The coldest is 24°F, on January 14, 2007.

The wettest day on record brought 2.7 in of rain, on February 14, 2019.

The best time to visit Riverside

The most comfortable time to visit is typically January, March to April, and November to December, when daytime highs sit near 72°F.

Winter (December–February) is warm, with average highs around 68°F and lows near 43°F.

Spring (March–May) is warm, with average highs around 76°F and lows near 50°F.

Summer (June–August) is hot, with average highs around 92°F and lows near 62°F.

Autumn (September–November) is hot, with average highs around 83°F and lows near 55°F.

Riverside climate questions

How much rain does Riverside get?

Riverside gets 9.4 in of precipitation in an average year, over about 35 rainy days.

What is the wettest month in Riverside?

February is the wettest month in Riverside, with 2.4 in. June is the driest, with 0.0 in.

How many rainy days does Riverside have a year?

Riverside has about 35 days with measurable rain in an average year. February has the most, about 7.

What is the hottest month in Riverside?

August is the warmest month in Riverside, with an average high of 95°F.

What is the coldest month in Riverside?

December is the coldest month in Riverside, with an average low of 42°F.

What is the record high temperature in Riverside?

The record high at the Riverside station is 118°F, set on July 6, 2018. The record low is 24°F, on January 14, 2007.

What is the sunniest month in Riverside?

July is the sunniest month in Riverside, with sunshine about 85% of daylight hours. March is the cloudiest.

What is the best time to visit Riverside?

The most comfortable time to visit is typically January, March to April, and November to December, when daytime highs sit near 72°F.