Lake Arrowhead (CA) Temperature by Month
Lake Arrowhead in California, United States of America sees significant seasonal temperature differences, with daytime highs between 10°C (50°F) in December and 28°C (82°F) in July, averaging 19°C (66°F) annually. Explore the full monthly breakdown below.
Lake Arrowhead Monthly Temperatures
The climate in Lake Arrowhead is dynamic, ranging widely from chilly in winter to comfortable in summer. Nights are significantly colder, with lows dropping from 16°C (61°F) in July to -1°C (30°F) in December.
The chart below illustrates the average maximum day and minimum night temperatures in Lake Arrowhead by month:
The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM, when the sun's heating effect is strongest. July, the warmest month, gets 369 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Lake Arrowhead 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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Lake Arrowhead vs World: Temperature Compared
Lake Arrowhead'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:
Lisbon, Portugal averages 21°C (70°F) annually — warm summers, mild winters, and rain mainly in the cooler months.
Glasgow, Scotland averages 13°C (55°F) a year — mild but often grey, with cold winters and rarely hot summers.
Chicago, USA averages 15°C (59°F) annually — known for extreme seasonal swings, from bitterly cold winters to warm summers.
Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate — hot dry summers and mild wet winters.
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 Lake Arrowhead's weather — including monthly rainfall, sunshine hours, and humidity — visit our Lake Arrowhead climate page.
