Alameda (CA) Temperature by Month
The average annual maximum temperature in Alameda, California, United States of America is 19°C (66°F), with daytime highs ranging from 15°C (59°F) in January to 24°C (75°F) in September. This page covers monthly averages, day-night differences, and how Alameda compares to cities worldwide.
Alameda Monthly Temperatures
Seasonal changes in Alameda bring a little variety without extreme temperature swings. Nighttime lows range from 13°C (55°F) in September to 6°C (43°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Alameda by month:
From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak. September, the warmest month, averages 270 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Alameda vs the United States of America
The map below shows the annual temperature across the United States of America. You can also select individual months if you want to compare a specific time of year.
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Alameda vs World: Temperature Compared
Alameda's average annual maximum temperature is 19°C (66°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.
Queenstown, New Zealand averages 10°C (50°F) annually — remember seasons are flipped, so its coldest months fall in June and July.
Beijing, China averages 20°C (68°F) annually, but with big seasonal swings — very cold winters and hot summers.
Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.
What Does the Temperature Feel Like in Alameda?
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 Alameda, January is the coolest month, with average highs of 15°C (59°F) and humidity around 80% — considered very high. In September, the warmest month, temperatures average 24°C (75°F) with 73% 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.
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 Alameda's weather — including monthly rainfall, sunshine hours, and humidity — visit our Alameda climate page.
