Crestline (CA) Temperature by Month
The average annual maximum temperature in Crestline, California, United States of America is 20°C (68°F), with daytime highs ranging from 10°C (50°F) in December to 30°C (86°F) in August. This page covers monthly averages, day-night differences, and how Crestline compares to cities worldwide.
Crestline Monthly Temperatures
Visitors to Crestline will encounter a climate influenced by big temperature differences across the year. Nighttime temperatures range from 17°C (63°F) in August to 1°C (34°F) in December.
The chart below illustrates the average maximum day and minimum night temperatures in Crestline 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. August, the warmest month, gets 351 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Crestline 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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Crestline vs World: Temperature Compared
Crestline's average annual maximum temperature is 20°C (68°F). To put that in context, here's how it compares to a few well-known destinations:
Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.
Glasgow, Scotland averages 13°C (55°F) a year — mild but often grey, with cold winters and rarely hot summers.
Seoul, South Korea averages 18°C (64°F) a year, with four clear seasons, cold winters, and hot humid summers.
Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.
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.
Seasonal temperature shifts influence more than just how warm it feels — they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.
Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Crestline this rarely lasts long on the ground.
For more on Crestline's weather — including monthly rainfall, sunshine hours, and humidity — visit our Crestline climate page.
