China · 1991–2020

Best time to visit
Dandong.

September leads for comfortable weather in Dandong: typically 24.5°C by day, 14.4°C at night, with 102 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high24.5°C

Typical low14.4°C

Rain in September102 mm

Comfort

September

September · June · May

85climate match

Beach

September

September · June · August

54climate match

Outdoors

October

October · May · April

80climate match

The weakest month is January, scoring 5 against September’s 85 — days reach only -1.8°C, 26° below 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

5-1.8° / -11.1°

Feb

52° / -8°

Mar

147.5° / -2.2°

Apr

4514.9° / 4.4°

May

6620.8° / 10.7°

Jun

7724.7° / 16.4°

Jul

3327° / 20.6°

Aug

3228.1° / 20.4°

Sep

8524.5° / 14.4°

Oct

5817.4° / 6.5°

Nov

168° / -1.1°

Dec

5-0.3° / -8.9°

Monthly climate evidence for Dandong — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 28 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	-1.8°C	-11.1°C	6 mm	1.3	2.1°C	9 h 36	5	Good coverage
February	2°C	-8°C	15 mm	2.5	0.7°C	10 h 37	5	Good coverage
March	7.5°C	-2.2°C	22 mm	3.2	2.3°C	11 h 49	14	Good coverage
April	14.9°C	4.4°C	56 mm	5.7	7.2°C	13 h 13	45	Good coverage
May	20.8°C	10.7°C	115 mm	8.3	12.8°C	14 h 22	66	Strong coverage
June	24.7°C	16.4°C	129 mm	9	18.0°C	15 h 00	77	Good coverage
July	27°C	20.6°C	315 mm	12.3	21.9°C	14 h 46	33	Good coverage
August	28.1°C	20.4°C	294 mm	11.9	24.1°C	13 h 45	32	Good coverage
September	24.5°C	14.4°C	102 mm	5.5	22.6°C	12 h 24	85	Good coverage
October	17.4°C	6.5°C	57 mm	5	17.6°C	11 h 04	58	Good coverage
November	8°C	-1.1°C	43 mm	4.6	11.6°C	9 h 54	16	Good coverage
December	-0.3°C	-8.9°C	16 mm	2.7	5.9°C	9 h 20	5	Good coverage

What has changed

Dandong runs +1.9°C
on the 1961–1990 baseline.

Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.

Jan

+2.2

Feb

+2.2

Mar

+2.3

Apr

+2.2

May

+1.8

Jun

+2.1

Jul

+2.2

Aug

+1.7

Sep

+2.3

Oct

+1.6

Nov

+1.7

Dec

+0.1

September daytime highs, 2011–2024. Last recorded: 28.2°C.

Records at DANDONG, 1951–2025
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	9.5°C24 Jan 2021	-27.8°C13 Jan 1951	34 mm12 Jan 1964	60 mm1964 · driest 0 mm in 1951	75
February	15.2°C19 Feb 1998	-28.0°C3 Feb 1952	50 mm10 Feb 2025	57 mm2025 · driest 0 mm in 1982	74
March	21.9°C30 Mar 2014	-25.2°C3 Mar 1951	92 mm4 Mar 2007	128 mm2007 · driest 0 mm in 2025	75
April	27.3°C20 Apr 1994	-7.0°C1 Apr 1972	86 mm18 Apr 2003	145 mm1969 · driest 1 mm in 2001	75
May	30.5°C30 May 2023	1.5°C2 May 1956	151 mm19 May 1995	274 mm2016 · driest 8 mm in 1952	75
June	34.5°C27 Jun 2000	5.3°C1 Jun 1957	111 mm28 Jun 1960	305 mm2022 · driest 3 mm in 2017	75
July	35.3°C27 Jul 1997	12.1°C4 Jul 1976	191 mm14 Jul 1953	865 mm2013 · driest 52 mm in 2019	75
August	35.5°C12 Aug 2009	9.5°C28 Aug 1972	414 mm4 Aug 1958	792 mm1958 · driest 6 mm in 1955	75
September	32.2°C5 Sep 2023	2.6°C22 Sep 1980	231 mm9 Sep 1999	285 mm1959 · driest 5 mm in 2023	74
October	27.5°C8 Oct 1982	-5.8°C28 Oct 1966	77 mm4 Oct 1994	170 mm1980 · driest 0 mm in 1990	74
November	22.4°C2 Nov 2024	-14.9°C30 Nov 1970	95 mm18 Nov 2020	122 mm2023 · driest 1 mm in 2008	73
December	13.0°C2 Dec 1968	-23.8°C29 Dec 1967	27 mm6 Dec 1992	59 mm2004 · driest 0 mm in 2024	74

Typical days per month at DANDONG, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	30	<1
February	0	0	26	<1
March	0	0	22	<1
April	<1	0	3	2
May	4	<1	0	3
June	14	1	0	3
July	23	4	0	6
August	28	7	0	5
September	14	<1	0	3
October	<1	0	2	2
November	0	0	17	1
December	0	0	29	<1

The best month has moved. On the 1961–1990 numbers the strongest month here was June (scoring 88); on 2011–2025 it is September (80). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in DANDONG’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	0%	7%	<1%	1%	-5.0–0.1°C
February	0%	9%	1%	3%	-1.7–4.1°C
March	0%	12%	2%	4%	4.7–10.0°C
April	9%	20%	6%	15%	12.9–17.1°C
May	51%	22%	8%	16%	19.0–22.3°C
June	68%	31%	12%	36%	22.6–26.2°C
July	62%	40%	21%	53%	25.3–28.8°C
August	67%	35%	19%	39%	26.7–29.2°C
September	74%	22%	10%	17%	22.8–25.4°C
October	24%	17%	6%	8%	15.5–18.9°C
November	<1%	16%	4%	6%	5.6–10.3°C
December	0%	9%	1%	2%	-2.8–2.0°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 68-year average. Warmest: 2024. Coolest: 1956.2024

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 2037886
NOAA station: CHM00054497 · DANDONG
Station distance: 10.3 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 23 usable years
Daylight: Calculated from latitude 40.13°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 28 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 DANDONG is what differs

Sinŭiju→Langtoucun→Uiju→Sindo→Yŏmju→Shizijie→

Or put two places side by side: Dandong vs Sinŭiju

Best time to visitDandong.

September

September

October

The whole year,without the guesswork.

Dandong runs +1.9°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Dandong.

The whole year,
without the guesswork.

Dandong runs +1.9°C
on the 1961–1990 baseline.

Nearby, measured,
and named.