10-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Light rain
17°
Feels like 17°
Wind↑ SSW 4 km/h
Humidity 88 %
💧 1.5 mm
Evening
Overcast
17°
Feels like 17°
Wind↑ NNW 14 km/h
Gusts24 km/h
Humidity 81 %
💧 0.1 mm
11-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Rain showers
18°
Feels like 18°
Wind↑ NE 21 km/h
Humidity 76 %
💧 0.6 mm
Evening
Overcast
18°
Feels like 18°
Wind↑ NE 15 km/h
Humidity 61 %
12-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Partly cloudy
17°
Feels like 17°
Wind↑ ENE 15 km/h
Humidity 59 %
Evening
Partly cloudy
17°
Feels like 17°
Wind↑ E 9 km/h
Humidity 62 %
13-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Morning
Clear sky
17°
Feels like 17°
Wind↑ N 9 km/h
Humidity 68 %
Evening
Clear sky
17°
Feels like 17°
Wind↑ NE 13 km/h
Humidity 60 %
Chongming forecast in charts · next 7 days
The week ahead: highs and lows
▲ This week runs +1.6° warmer than usual
Highs Lows Usual for the season (1991–2020 average)
Hourly detail
Temperature (°C) Rain (mm) Wind (km/h)
Chongming climate: what a normal year looks like
Swimmers find the warmest sea in August (28 °C) and the coolest in February (7 °C).
The hottest stretch is August, when afternoons average 31 °C; the coldest is January, when nights average 3 °C. Between those two months the average temperature changes by 24 °C.
Afternoons reach 30 °C or more in July and August; the typical peak is 31 °C in August.
From 14 h 12 min of daylight in late June to 10 h 05 min in late December.
Forecast highs for the coming week average 21 °C, 1 °C cooler than a normal October (22 °C).
30-year averages (1991–2020)
Month
Typical high
Typical low
Rainfall
Sea
Jan
7 °C
3 °C
63 mm
8 °C
Feb
9 °C
4 °C
62 mm
7 °C
Mar
12 °C
7 °C
91 mm
9 °C
Apr
18 °C
12 °C
98 mm
14 °C
May
23 °C
18 °C
119 mm
19 °C
Jun
26 °C
22 °C
254 mm
23 °C
Jul
31 °C
26 °C
173 mm
27 °C
Aug
31 °C
27 °C
167 mm
28 °C
Sep
27 °C
23 °C
106 mm
26 °C
Oct
22 °C
17 °C
59 mm
22 °C
Nov
17 °C
12 °C
59 mm
17 °C
Dec
10 °C
5 °C
44 mm
11 °C
Whole year
19 °C
15 °C
1,290 mm
17 °C
Source: our own processing of the ERA5 reanalysis (Copernicus/ECMWF) for 31.62° N, 121.70° E, 1991–2020. ERA5 averages over a 0.25° grid (about 25 km): hills, a coastline or the heat of the city itself can shift local values by a degree or two.
Air you breathe in Chongming: pollution and pollen
4/6
Poor
European Air Quality Index (EAQI), from Copernicus CAMS
PM2.544µg/m³
PM1052µg/m³
Copernicus CAMS model, updated several times a day.
Rain radar around Chongming
Rain observed over the last two hours by official weather radars around Chongming, followed by the radar forecast for the next hour where the weather service provides one.
Rain radarLast two hours, then forecast where available · drag the timeline
No open weather radar covers Chongming yet: the map shows our hour-by-hour rain forecast (ICON, GFS).
Moon over Chongming
Waning gibbous
79 % illuminated · 19.3 days
Rise 17:26 Set 07:30
Sat31/1069%
Sun1/1159%
Mon2/1149%Last quarter
Tue3/1138%
Wed4/1128%
Thu5/1119%
Fri6/1112%
Sat7/116%
Sun8/112%
Mon9/110%
Tue10/111%New moon
Wed11/113%
Moonrise and moonset in local time (Asia/Shanghai); phase and lit fraction from a synodic calculation.
Sea and tides near Chongming
Tide station used: Huilong · 22 km away
🌊 Sea surface
20.4 °C
satellite, 30/10
Sea state
Rippled
waves 0.4 m
Period
3 s
Swell
0.1 m
ThuThu 29/10
High tide13:436.0 m
Low tide20:110.8 m
TodayFri 30/10
High tide02:165.4 m
Low tide08:211.4 m
High tide14:235.7 m
Low tide20:551.1 m
TomorrowSat 31/10
High tide03:055.1 m
Low tide09:051.8 m
High tide15:105.4 m
Low tide21:461.5 m
SunSun 01/11
High tide04:094.8 m
Low tide10:002.2 m
High tide16:155.0 m
Low tide22:531.9 m
Indicative heights above chart datum. Coefficient: 20 for the weakest tides, 120 for the strongest.
Look up a past day in Chongming
Curious about the weather in Chongming on a given day? Choose a date: we read it from the ERA5 reanalysis (ECMWF / Copernicus C3S), which runs until about a week ago.
Chongming weather at a glance
This page gathers everything about the weather in Chongming: conditions now, the forecast for each part of the day and the trend for the coming week. At the moment the sky is “rain showers”, it is 17 °C (feels like 17 °C) and the wind blows at 12 km/h.
Expected range today: 16 °C to 22 °C and a dry sky. The forecast comes from the AtmoAtlas engine, which combines ECMWF-AIFS, NOAA GFS and DWD ICON, adjusts cloud cover with METAR reports and uses convective energy (CAPE) to flag storms, plus the tide times for Huilong.
Use the Chongming forecast in your own website or app: one JSON call returns weather, air quality, tides and sun and moon times. The free key needs no card.
