West Sacramento (CA) Temperature by Month

The average annual maximum temperature in West Sacramento, California, United States of America is 24°C (75°F), with daytime highs ranging from 13°C (55°F) in December to 34°C (93°F) in July. This page covers monthly averages, day-night differences, and how West Sacramento compares to cities worldwide.

In West Sacramento, temperatures can shift dramatically between very warm in summer and mild in winter. Nights follow the same pattern, with lows ranging from 15°C (59°F) in July to 3°C (37°F) in December.

The chart below illustrates the average maximum day and minimum night temperatures in West Sacramento by month:

Temperatures tend to bottom out between 4 AM and 6 AM, then climb to their daily peak around 3 PM. July, the warmest month, sees 440 hours of sunshine.

The chart below shows the average temperature throughout the year:

West Sacramento's average annual maximum temperature is 24°C (75°F). To put that in context, here's how it compares to a few well-known destinations:

Seville, Spain averages 23°C (73°F) a year, one of the warmer cities in Western Europe, with long hot summers.

Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.

Boston, USA averages 16°C (61°F) annually, with four distinct seasons and cold winters that rival northern Europe.

Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate, hot dry summers and mild wet winters.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In West Sacramento, December is the coolest month, with average highs of 13°C (55°F) and humidity around 83%, considered very high. In July, the warmest month, temperatures average 34°C (93°F) with 53% humidity, conditions that feel moderate. For a full picture, see our humidity page.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained, so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.

For more on West Sacramento's weather, including monthly rainfall, sunshine hours, and humidity, visit our West Sacramento climate page.