September
Other strong months: June and May
88/100 weather score
China · 1991–2020
Best time to visit
Dalian
For Dalian, September has the most comfortable weather in our climate comparison. Typical daytime highs are 24.4°C, nights average 18.1°C, and rainfall totals about 62 mm. Figures use measured 1991–2020 normals from the nearest eligible NOAA station.
Best all-round monthSeptember
Typical daytime high24.4°C
Typical night-time low18.1°C
September rainfall62 mm
September
Other strong months: July and June
72/100 weather score
October
Other strong months: May and April
88/100 weather score
Make the answer personal
Choose the weather
that suits you.
Set the daytime temperature and rainfall you are comfortable with. We will show only the months that meet every choice, using the measured 1991–2020 averages below.
3 months fit your choices for Dalian
The lowest comfort score is 5 out of 100. January, February and December share that score. In January, that is mainly because days reach only -0.1°C, 24° below the 24°C the score treats as ideal.
Quick answers
Planning a trip to Dalian?
These answers come from the same measured monthly climate record shown on this page.
When is the best time to visit Dalian?
September is the strongest all-round choice in our temperature-and-rainfall comparison, with a typical daytime high of 24.4°C and 62 mm of rain.
What is the hottest month in Dalian?
August is hottest in this record, with a typical daytime high of 27.6°C and a night-time low of 22.1°C.
Which month has the least rain?
January has the lowest monthly rainfall total at 6 mm.
Is this a weather forecast?
No. These are long-term measured averages from 1991–2020. Check a current forecast before you travel.
Month by month
See how the weather
changes through the year.
The bars combine daytime temperature, night-time temperature and rainfall. The figures are measured historical averages, not a forecast for a particular trip.
| Month | Day | Night | Rain | Wet days | Sea | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|---|
| January | -0.1°C | -6.3°C | 6 mm | 1.5 | 5.1°C | 9 h 43 | 5 | Good coverage |
| February | 2.6°C | -3.7°C | 7 mm | 1.3 | 3.3°C | 10 h 40 | 5 | Good coverage |
| March | 7.7°C | 0.9°C | 13 mm | 2.2 | 3.9°C | 11 h 50 | 21 | Good coverage |
| April | 15°C | 7.1°C | 36 mm | 3.6 | 7.1°C | 13 h 10 | 55 | Good coverage |
| May | 21.1°C | 13°C | 60 mm | 5.1 | 12.1°C | 14 h 16 | 81 | Good coverage |
| June | 24.6°C | 17.7°C | 83 mm | 5.8 | 17.4°C | 14 h 53 | 84 | Good coverage |
| July | 27°C | 21.6°C | 141 mm | 9.1 | 21.7°C | 14 h 38 | 58 | Good coverage |
| August | 27.6°C | 22.1°C | 180 mm | 8.2 | 24.3°C | 13 h 41 | 50 | Good coverage |
| September | 24.4°C | 18.1°C | 62 mm | 4.5 | 22.5°C | 12 h 24 | 88 | Good coverage |
| October | 17.9°C | 11.2°C | 41 mm | 5 | 18.5°C | 11 h 07 | 70 | Good coverage |
| November | 9.8°C | 3°C | 28 mm | 3.5 | 13.6°C | 10 h | 31 | Good coverage |
| December | 2.8°C | -3.6°C | 12 mm | 2.7 | 9.3°C | 9 h 27 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 10.2°C11 Jan 2002 | -21.1°C4 Jan 1970 | 30 mm28 Jan 2025 | 39 mm1964 · driest 0 mm in 1993 | 69 |
| February | 14.2°C26 Feb 1992 | -17.3°C24 Feb 1969 | 27 mm18 Feb 1990 | 31 mm2021 · driest 0 mm in 1989 | 68 |
| March | 25.7°C22 Mar 2025 | -15.3°C6 Mar 1971 | 56 mm4 Mar 2007 | 94 mm2007 · driest 0 mm in 2011 | 69 |
| April | 28.5°C21 Apr 2004 | -4.2°C6 Apr 1964 | 79 mm20 Apr 2009 | 126 mm2009 · driest 1 mm in 1953 | 70 |
| May | 33.8°C29 May 1979 | 3.7°C3 May 1961 | 92 mm17 May 2005 | 198 mm2020 · driest 0 mm in 1957 | 74 |
| June | 35.6°C11 Jun 2004 | 10.5°C5 Jun 1992 | 157 mm26 Jun 2011 | 244 mm1984 · driest 5 mm in 1955 | 74 |
| July | 36.6°C14 Jul 2015 | 14.2°C3 Jul 1976 | 171 mm17 Jul 1955 | 580 mm2013 · driest 8 mm in 2018 | 74 |
| August | 34.4°C1 Aug 1968 | 14.5°C31 Aug 1966 | 183 mm15 Aug 1987 | 376 mm1998 · driest 2 mm in 1955 | 71 |
| September | 33.4°C1 Sep 2002 | 6.4°C28 Sep 1968 | 232 mm1 Sep 1992 | 286 mm2022 · driest 2 mm in 2023 | 67 |
| October | 28.2°C2 Oct 1953 | -1.9°C26 Oct 1958 | 65 mm9 Oct 2001 | 128 mm2007 · driest 2 mm in 1982 | 68 |
| November | 24.7°C3 Nov 2023 | -12.8°C28 Nov 1987 | 42 mm5 Nov 2023 | 113 mm1993 · driest 0 mm in 2007 | 69 |
| December | 15.8°C9 Dec 2023 | -19.0°C28 Dec 1967 | 40 mm19 Dec 1979 | 60 mm1979 · driest 0 mm in 2024 | 69 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 0 | 0 | 28 | 0 |
| February | 0 | 0 | 23 | <1 |
| March | 0 | 0 | 12 | <1 |
| April | <1 | 0 | <1 | 1 |
| May | 5 | <1 | 0 | 2 |
| June | 13 | 2 | 0 | 3 |
| July | 24 | 5 | 0 | 4 |
| August | 28 | 4 | 0 | 4 |
| September | 13 | <1 | 0 | 2 |
| October | <1 | 0 | <1 | 1 |
| November | 0 | 0 | 8 | <1 |
| December | 0 | 0 | 24 | <1 |
| Month | Dry days reaching 20°C | Wet days | Days with heavy rain | Weeks with 3+ wet days | Typical high by year |
|---|---|---|---|---|---|
| January | 0% | 6% | <1% | 2% | -2.9–1.7°C |
| February | 0% | 6% | <1% | 2% | -1.3–4.1°C |
| March | <1% | 9% | <1% | 3% | 4.8–9.8°C |
| April | 8% | 14% | 4% | 7% | 12.1–16.8°C |
| May | 52% | 16% | 6% | 8% | 18.5–22.7°C |
| June | 74% | 21% | 8% | 19% | 22.0–26.1°C |
| July | 71% | 29% | 14% | 37% | 25.0–28.1°C |
| August | 75% | 27% | 13% | 27% | 26.0–28.5°C |
| September | 79% | 17% | 7% | 10% | 22.8–25.4°C |
| October | 28% | 14% | 4% | 6% | 16.3–19.4°C |
| November | <1% | 12% | 3% | 4% | 7.6–11.7°C |
| December | 0% | 8% | <1% | 2% | -0.7–5.2°C |
A dry day reaching 20°C records under 1 mm of rain. A wet day records at least 1 mm, while a heavy-rain day records at least 10 mm. The weekly figure is the share of seven-day periods containing three or more wet days. The final column shows the middle 80% of average daytime highs recorded for that month in individual years; a wider range means conditions have varied more from one year to another.
The evidence behind this page
Where these figures
come from.
- Place identity
- GeoNames 1814087
- NOAA station
- CHM00054662 · DALIAN
- Station distance
- 3 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 22 usable years
- Daylight
- Calculated from latitude 38.91°, mid-month, sunrise to sunset including refraction. Not a station measurement.
- Sea temperature
- NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 5 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.
Next step
Choose your month.
Then plan the details.
The weather comparison for Dalian is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
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