Milpitas (CA) Temperature by Month

Milpitas in California, United States of America sees significant seasonal temperature differences, with daytime highs between 15°C (59°F) in December and 27°C (81°F) in July, averaging 22°C (72°F) annually. Explore the full monthly breakdown below.

Visitors to Milpitas can expect significant temperature changes throughout the year. Nighttime temperatures also vary widely, ranging from 15°C (59°F) in July to 5°C (41°F) in December.

The chart below illustrates the average maximum day and minimum night temperatures in Milpitas 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 313 hours of sunshine.

The chart below shows the average temperature throughout the year:

Milpitas's average annual maximum temperature is 22°C (72°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.

Reykjavík, Iceland averages 9°C (48°F) a year, mild summers by Icelandic standards, but cold winters and frequent wind.

Chicago, USA averages 15°C (59°F) annually, known for extreme seasonal swings, from bitterly cold winters to warm summers.

Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.

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 Milpitas, December is the coolest month, with average highs of 15°C (59°F) and humidity around 78%, considered high. In July, the warmest month, temperatures average 27°C (81°F) with 75% humidity, conditions that feel high. 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.

Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round, large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.

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