China · 1991–2020

Best time to visit
Haikou.

February leads for comfortable weather in Haikou: typically 23.1°C by day, 17.1°C at night, with 35 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortFebruary

Typical high23.1°C

Typical low17.1°C

Rain in February35 mm

Comfort

February

February · January · December

90climate match

Beach

March

March · November · April

83climate match

Outdoors

January

January · February · December

84climate match

The weakest month is July, scoring 5 against February’s 90 — 294 mm of rain falls, and days average 33.4°C, 9° above the 24°C the score treats as ideal.

Month by month

The whole year,
without the guesswork.

The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.

Jan

8821.3° / 15.8°

Feb

9023.1° / 17.1°

Mar

7826.5° / 19.7°

Apr

5530.1° / 22.9°

May

2132.3° / 24.9°

Jun

1033.5° / 25.8°

Jul

533.4° / 25.8°

Aug

832.4° / 25.6°

Sep

1531° / 24.9°

Oct

2528.9° / 23.5°

Nov

7626° / 20.8°

Dec

8722.4° / 17.6°

Monthly climate evidence for Haikou — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 11 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	21.3°C	15.8°C	26 mm	4.4	19.8°C	11 h 02	88	Good coverage
February	23.1°C	17.1°C	35 mm	6.1	19.3°C	11 h 28	90	Strong coverage
March	26.5°C	19.7°C	49 mm	6.2	20.5°C	11 h 59	78	Good coverage
April	30.1°C	22.9°C	83 mm	7.1	22.9°C	12 h 35	55	Good coverage
May	32.3°C	24.9°C	214 mm	13.1	26.2°C	13 h 04	21	Good coverage
June	33.5°C	25.8°C	243 mm	14	27.9°C	13 h 20	10	Good coverage
July	33.4°C	25.8°C	294 mm	14	28.5°C	13 h 14	5	Good coverage
August	32.4°C	25.6°C	293 mm	12.9	28.4°C	12 h 49	8	Good coverage
September	31°C	24.9°C	291 mm	12.2	28.1°C	12 h 14	15	Good coverage
October	28.9°C	23.5°C	308 mm	8.6	27.2°C	11 h 39	25	Good coverage
November	26°C	20.8°C	63 mm	6.2	25.0°C	11 h 10	76	Good coverage
December	22.4°C	17.6°C	43 mm	5.7	22.1°C	10 h 55	87	Strong coverage

Records at HAIKOU, 1951–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	33.5°C28 Jan 1969	2.8°C12 Jan 1955	36 mm31 Jan 1969	88 mm1989 · driest 0 mm in 2014	71
February	37.2°C21 Feb 1979	6.5°C4 Feb 1969	61 mm17 Feb 2022	143 mm2022 · driest 0 mm in 2002	73
March	38.1°C20 Mar 1962	6.4°C2 Mar 1986	92 mm25 Mar 2009	215 mm2009 · driest 5 mm in 1980	70
April	41.3°C30 Apr 2024	9.8°C5 Apr 1969	130 mm16 Apr 1986	272 mm1967 · driest 3 mm in 2002	69
May	39.2°C7 May 2023	16.3°C7 May 1984	129 mm1 May 1964	373 mm2024 · driest 78 mm in 1996	71
June	38.4°C8 Jun 1977	21.2°C5 Jun 1964	210 mm13 Jun 1952	587 mm1958 · driest 41 mm in 1996	71
July	38.4°C13 Jul 1961	21.0°C6 Jul 1952	391 mm18 Jul 2014	601 mm2014 · driest 30 mm in 1967	70
August	37.0°C15 Aug 1977	21.7°C21 Aug 1972	327 mm22 Aug 1998	607 mm2016 · driest 61 mm in 1987	70
September	36.0°C3 Sep 1988	17.5°C26 Sep 1966	328 mm20 Sep 1996	782 mm1996 · driest 46 mm in 1999	71
October	34.5°C12 Oct 2003	14.1°C31 Oct 1958	331 mm5 Oct 2011	1213 mm2010 · driest 0 mm in 1979	70
November	34.7°C25 Nov 1997	10.0°C30 Nov 1987	253 mm8 Nov 1972	543 mm1972 · driest 0 mm in 1997	70
December	31.5°C17 Dec 1966	5.3°C30 Dec 1975	92 mm9 Dec 1963	166 mm1963 · driest 0 mm in 1973	72

Typical days per month at HAIKOU, 1991–2020
Month	Days 25°C+	Days 30°C+	Heavy rain (10 mm+)
January	7	<1	<1
February	11	2	<1
March	20	8	1
April	26	17	3
May	31	24	5
June	30	28	7
July	31	29	6
August	31	28	5
September	30	22	6
October	30	10	5
November	19	2	1
December	7	<1	1

How often, not how much — every day in HAIKOU’s record sorted by what it was actually like, rather than averaged
Month	Warm & dry days	Wet days	Washouts	Week with 3+ wet days	Daytime mean has ranged
January	55%	15%	2%	18%	18.8–23.4°C
February	60%	23%	3%	26%	19.7–25.4°C
March	74%	20%	5%	20%	23.7–29.0°C
April	75%	25%	9%	30%	27.6–32.1°C
May	60%	41%	18%	56%	30.7–34.0°C
June	58%	43%	21%	59%	31.8–34.4°C
July	63%	38%	19%	49%	32.1–34.5°C
August	61%	40%	20%	52%	31.3–33.2°C
September	60%	40%	22%	52%	29.8–31.8°C
October	71%	30%	16%	34%	27.2–29.7°C
November	78%	21%	7%	21%	23.8–27.2°C
December	68%	15%	4%	15%	20.1–24.0°C

A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.

1951Each stripe is one year’s mean temperature against the 67-year average. Warmest: 2024. Coolest: 1971.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 1809078
NOAA station: CHM00059758 · HAIKOU
Station distance: 10.8 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 23 usable years
Daylight: Calculated from latitude 20.03°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 11 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
Important limit: Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.

These places read the same station, so their numbers are identical — distance from HAIKOU is what differs

Xiuying→Qiongshan→Xucheng→Jinjiang→Yunlong→Yongxing→

Or put two places side by side: Haikou vs Xiuying

Best time to visitHaikou.