Healdsburg (CA) Temperature by Month
Healdsburg, California, United States of America has an average annual maximum temperature of 23°C (73°F), ranging from 14°C (57°F) in January to 30°C (86°F) in July. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Healdsburg Monthly Temperatures
With significant temperature fluctuations, Healdsburg enjoys distinct seasons year-round. Nighttime lows range from 12°C (54°F) in July to 4°C (39°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Healdsburg by month:
Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating. July, the warmest month of the year, receives 306 hours of sunshine.
The chart below shows the average temperature throughout the year:
Daily Historical Temperatures
50-year average (1976-2025)
Average high and low temperatures for each day of the month based on long-term records.
Average temperatures in July
Historical Healdsburg Temperatures: 1976-2026
Browse day-by-day temperature records for Healdsburg spanning 51 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: Healdsburg 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
Healdsburg vs World: Temperature Compared
Healdsburg'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.
Interlaken, Switzerland averages 8°C (46°F) a year, with cold winters and cool summers thanks to its Alpine setting.
Shanghai, China averages 21°C (70°F) a year, with warm summers, mild winters, and a noticeable spring and autumn.
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.
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 Healdsburg's weather — including monthly rainfall, sunshine hours, and humidity — visit our Healdsburg climate page.
