Norwalk (CA) Temperature by Month
Norwalk, California, United States of America has an average annual maximum temperature of 25°C (77°F), with moderate seasonal shifts ranging from 20°C (68°F) in December to 30°C (86°F) in August. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Norwalk Monthly Temperatures
The moderate changes in the climate in Norwalk ensure gradual weather shifts through each season. At night, temperatures drop to between 19°C (66°F) and 8°C (46°F) depending on the time of year.
The chart below illustrates the average maximum day and minimum night temperatures in Norwalk by month:
Low temperatures are most often recorded between 4 AM and 6 AM, while highs typically occur around 3 PM. August, the city's warmest month, sees 347 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Norwalk 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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moderate
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Norwalk vs World: Temperature Compared
Norwalk's average annual maximum temperature is 25°C (77°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.
What Does the Temperature Feel Like in Norwalk?
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 Norwalk, December is the coolest month, with average highs of 20°C (68°F) and humidity around 52% — considered moderate. In August, the warmest month, temperatures average 30°C (86°F) with 71% 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.
Global average temperatures have risen by around 1.2°C since the pre-industrial era, and the effects are visible across many regions. Winters are milder on average, with fewer frost days and less snow in many parts of the world. Heatwaves are more frequent and more intense, and Europe's summers of 2018, 2019, and 2020 all set records.
Summers are also getting drier in some areas, while winter rainfall has increased in others. This contributies to higher river levels and more flooding. In many countries, spring arrives earlier and autumn lasts longer. It has knock-on effects for wildlife, agriculture, and local ecosystems.
For more on Norwalk's weather — including monthly rainfall, sunshine hours, and humidity — visit our Norwalk climate page.
