Upper Lake (CA) Temperature by Month
Upper Lake in California, United States of America sees significant seasonal temperature differences, with daytime highs between 12°C (54°F) in December and 33°C (91°F) in July, averaging 23°C (73°F) annually. Explore the full monthly breakdown below.
Upper Lake Monthly Temperatures
Visitors to Upper Lake can expect significant temperature changes throughout the year. Nighttime temperatures also vary widely, ranging from 12°C (54°F) in July to 0°C (32°F) in December.
The chart below illustrates the average maximum day and minimum night temperatures in Upper Lake by month:
Low temperatures are most often recorded between 4 AM and 6 AM, while highs typically occur around 3 PM. July, the city's warmest month, sees 306 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Upper Lake 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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Upper Lake vs World: Temperature Compared
Upper Lake's average annual maximum temperature is 23°C (73°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.
Zermatt, Switzerland averages just 4°C (39°F) annually due to its altitude, with very cold winters and cool summers even at its warmest.
New York City, USA averages 17°C (63°F) a year, with hot humid summers and cold winters that bring regular snowfall.
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.
Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round — large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.
For more on Upper Lake's weather — including monthly rainfall, sunshine hours, and humidity — visit our Upper Lake climate page.
