Haikou Temperature by Month
The average annual maximum temperature in Haikou, Hainan, China is 28°C (82°F), with daytime highs ranging from 21°C (70°F) in January to 32°C (90°F) in July. This page covers monthly averages, day-night differences, and how Haikou compares to cities worldwide.
Haikou Monthly Temperatures
The weather in Haikou changes moderately throughout the year, offering enough variation to appreciate each season. Nights are cooler, with lows ranging from 27°C (81°F) to 17°C (63°F).
The chart below illustrates the average maximum day and minimum night temperatures in Haikou 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 250 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 June
Historical Haikou Temperatures: 1976-2026
Browse day-by-day temperature records for Haikou spanning 51 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: Haikou vs China
The map below shows the annual temperature across China. You can also select individual months if you want to compare a specific time of year.
very warm
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moderate
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Haikou vs World: Temperature Compared
Haikou's average annual maximum temperature is 28°C (82°F). To put that in context, here's how it compares to a few well-known destinations:
Seville, Spain averages 23°C (73°F) a year — one of the warmer cities in Western Europe, with long hot summers.
On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.
Osaka, Japan averages 22°C (72°F) annually, with hot humid summers, mild winters, and pleasant spring and autumn seasons.
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 Haikou?
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 Haikou, January is the coolest month, with average highs of 21°C (70°F) and humidity around 84% — considered very high. In July, the warmest month, temperatures average 32°C (90°F) with 80% humidity — conditions that feel very 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.
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 Haikou's weather — including monthly rainfall, sunshine hours, and humidity — visit our Haikou climate page.
