Avalon (CA) Temperature by Month
The average annual maximum temperature in Avalon, California, United States of America is 21°C (70°F), with daytime highs ranging from 17°C (63°F) in December to 25°C (77°F) in September. This page covers monthly averages, day-night differences, and how Avalon compares to cities worldwide.
Avalon Monthly Temperatures
The climate in Avalon experiences moderate temperature changes, with mild shifts between seasons. At night, temperatures range from 17°C (63°F) in September to 10°C (50°F) in December.
The chart below illustrates the average maximum day and minimum night temperatures in Avalon 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 278 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Avalon 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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Avalon vs World: Temperature Compared
Avalon's average annual maximum temperature is 21°C (70°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.
Shanghai, China averages 21°C (70°F) a year, with warm summers, mild winters, and a noticeable spring and autumn.
Melbourne, Australia averages 20°C (68°F) annually — known for unpredictable weather, with four seasons sometimes happening in one day.
What Does the Temperature Feel Like in Avalon?
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 Avalon, December is the coolest month, with average highs of 17°C (63°F) and humidity around 52% — considered moderate. In September, the warmest month, temperatures average 25°C (77°F) with 67% 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 Avalon's weather — including monthly rainfall, sunshine hours, and humidity — visit our Avalon climate page.
