Vallejo, CA Weather by Month and Climate Averages

How much rain does Vallejo get?

Vallejo gets 21.5 in of precipitation in an average year, spread over about 47 days with measurable rain. That is fewer rainy days than 84% of the US.

December is the wettest month, with 4.5 in. July is the driest, with 0.0 in. January has the most rainy days, about 9.

The longest dry spell in the last five years lasted 181 days, to November 1, 2024.

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

Vallejo weather by month

Vallejo weather in January

In January, Vallejo averages a high of 58°F and a low of 42°F. It gets 4.5 in of precipitation over about 9 rainy days. The sun is out about 34% of daylight hours. The January record high is 80°F (2021) and the record low is 21°F (1999).

Vallejo weather in February

In February, Vallejo averages a high of 63°F and a low of 43°F. It gets 3.6 in of precipitation over about 8 rainy days. The sun is out about 54% of daylight hours. The February record high is 82°F (2016) and the record low is 30°F (2003). February is one of the most comfortable months to visit.

Vallejo weather in March

In March, Vallejo averages a high of 68°F and a low of 45°F. It gets 3.2 in of precipitation over about 8 rainy days. The sun is out about 49% of daylight hours. The March record high is 90°F (2004) and the record low is 25°F (1999). March is one of the most comfortable months to visit.

Vallejo weather in April

In April, Vallejo averages a high of 72°F and a low of 47°F. It gets 1.4 in of precipitation over about 4 rainy days. The sun is out about 61% of daylight hours. The April record high is 93°F (2015) and the record low is 32°F (1999). April is one of the most comfortable months to visit.

Vallejo weather in May

In May, Vallejo averages a high of 77°F and a low of 50°F. It gets 0.8 in of precipitation over about 2 rainy days. The sun is out about 67% of daylight hours. The May record high is 103°F (2020) and the record low is 38°F (2003). May is one of the most comfortable months to visit.

Vallejo weather in June

In June, Vallejo averages a high of 82°F and a low of 54°F. It gets 0.2 in of precipitation over about 0 rainy days. The sun is out about 69% of daylight hours. The June record high is 110°F (2000) and the record low is 44°F (1999).

Vallejo weather in July

In July, Vallejo averages a high of 85°F and a low of 56°F. It gets 0.0 in of precipitation over about 0 rainy days. The sun is out about 72% of daylight hours. The July record high is 107°F (2024) and the record low is 49°F (1999).

Vallejo weather in August

In August, Vallejo averages a high of 85°F and a low of 57°F. It gets 0.0 in of precipitation over about 0 rainy days. The sun is out about 72% of daylight hours. The August record high is 109°F (2020) and the record low is 47°F (2002).

Vallejo weather in September

In September, Vallejo averages a high of 85°F and a low of 56°F. It gets 0.1 in of precipitation over about 1 rainy days. The sun is out about 71% of daylight hours. The September record high is 113°F (2017) and the record low is 44°F (2004).

Vallejo weather in October

In October, Vallejo averages a high of 79°F and a low of 52°F. It gets 1.0 in of precipitation over about 2 rainy days. The sun is out about 66% of daylight hours. The October record high is 105°F (2024) and the record low is 35°F (2022). October is one of the most comfortable months to visit.

Vallejo weather in November

In November, Vallejo averages a high of 67°F and a low of 47°F. It gets 2.2 in of precipitation over about 5 rainy days. The sun is out about 55% of daylight hours. The November record high is 84°F (2018) and the record low is 30°F (2003). November is one of the most comfortable months to visit.

Vallejo weather in December

In December, Vallejo averages a high of 59°F and a low of 42°F. It gets 4.5 in of precipitation over about 7 rainy days. The sun is out about 33% of daylight hours. The December record high is 77°F (1999) and the record low is 23°F (1998).

Sunshine, humidity and wind in Vallejo

July is the sunniest month in Vallejo, with sunshine about 72% of daylight hours. December is the cloudiest, at 33%. Over the year the sun shines about 59% of daylight hours. Vallejo is sunnier than 84% of the US.

Humidity peaks in December at 78% and is lowest in October at 54%.

Vallejo has about 33 days a year above 90°F. Vallejo is hotter than 54% of the US.

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

Vallejo weather records

The hottest temperature on record at the Vallejo station is 113°F, on September 1, 2017. The coldest is 21°F, on January 7, 1999.

The wettest day on record brought 3.0 in of rain, on December 30, 2022.

The best time to visit Vallejo

The most comfortable time to visit is typically February to May and October to November, when daytime highs sit near 71°F.

Winter (December–February) is mild, with average highs around 60°F and lows near 42°F.

Spring (March–May) is warm, with average highs around 72°F and lows near 47°F.

Summer (June–August) is hot, with average highs around 84°F and lows near 55°F.

Autumn (September–November) is warm, with average highs around 77°F and lows near 51°F.

Vallejo climate questions

How much rain does Vallejo get?

Vallejo gets 21.5 in of precipitation in an average year, over about 47 rainy days.

What is the wettest month in Vallejo?

December is the wettest month in Vallejo, with 4.5 in. July is the driest, with 0.0 in.

How many rainy days does Vallejo have a year?

Vallejo has about 47 days with measurable rain in an average year. January has the most, about 9.

What is the hottest month in Vallejo?

July is the warmest month in Vallejo, with an average high of 85°F.

What is the coldest month in Vallejo?

January is the coldest month in Vallejo, with an average low of 42°F.

What is the record high temperature in Vallejo?

The record high at the Vallejo station is 113°F, set on September 1, 2017. The record low is 21°F, on January 7, 1999.

What is the sunniest month in Vallejo?

July is the sunniest month in Vallejo, with sunshine about 72% of daylight hours. December is the cloudiest.

What is the best time to visit Vallejo?

The most comfortable time to visit is typically February to May and October to November, when daytime highs sit near 71°F.