Alpine (CA) Temperature by Month
The average annual maximum temperature in Alpine, California, United States of America is 25°C (77°F), with daytime highs ranging from 17°C (63°F) in December to 33°C (91°F) in August. This page covers monthly averages, day-night differences, and how Alpine compares to cities worldwide.
Alpine Monthly Temperatures
The climate in Alpine is known for significant temperature differences throughout the year. At night, this contrast is just as clear, with lows ranging from 16°C (61°F) in August to 5°C (41°F) in December.
The chart below illustrates the average maximum day and minimum night temperatures in Alpine 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 295 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Alpine 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.
very warm
warm
pleasant
moderate
cold
very cold
Alpine vs World: Temperature Compared
Alpine'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:
Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.
Glasgow, Scotland averages 13°C (55°F) a year — mild but often grey, with cold winters and rarely hot summers.
Buenos Aires, Argentina averages 23°C (73°F) a year, with hot summers and mild winters — and seasons reversed compared to 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 Alpine?
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 Alpine, December is the coolest month, with average highs of 17°C (63°F) and humidity around 64% — considered high. In August, the warmest month, temperatures average 33°C (91°F) with 74% 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.
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 Alpine this rarely lasts long on the ground.
For more on Alpine's weather — including monthly rainfall, sunshine hours, and humidity — visit our Alpine climate page.
