Nantong, China climate

Cfa Humid subtropical

Nantong has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 90°F, while the coldest is January averaging around 36°F at night. Precipitation totals about 48 inches a year and is strongly seasonal — August alone averages 8.5 inches while December barely receives 1.77 inches.

☀️ Summers

Hot

Highs near 90°F in July.

About 33 days a year above 90 °F

❄️ Winters

Chilly

Lows near 36°F in January.

About 20 freezing nights a year

🌧️ Rain

Wet

About 48 in of rain a year.

Wettest in August

⛅ Sky & trend

Often cloudy

Cloudy skies much of the year.

+0.7 °F vs 50 years ago

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Clear vs cloudy days

Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day counts

Nantong climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	47	50	57	68	77	82	90	89	82	73	64	52
Avg temp (°F)	41	44	51	60	70	77	84	84	77	68	57	46
Avg low (°F)	36	38	44	53	63	71	78	78	72	62	51	40
Precipitation (in)	2.9	2.5	3.6	2.9	3.3	8.4	5.9	8.5	3.5	2.5	2.3	1.8

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°F)	47	50	57	68	77	82
Avg temp (°F)	41	44	51	60	70	77
Avg low (°F)	36	38	44	53	63	71
Precipitation (in)	2.9	2.5	3.6	2.9	3.3	8.4

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	90	89	82	73	64	52
Avg temp (°F)	84	84	77	68	57	46
Avg low (°F)	78	78	72	62	51	40
Precipitation (in)	5.9	8.5	3.5	2.5	2.3	1.8

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	10	10	12	11	11	14	11	12	10	7	9	8
Days with high ≥ 90°F (days)	—	—	—	0.3	1	4	15	11	2	0.0	—	—
Days with low ≤ 32°F (days)	9	5	0.7	—	—	—	—	—	—	—	0.2	5

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	10	10	12	11	11	14
Days with high ≥ 90°F (days)	—	—	—	0.3	1	4
Days with low ≤ 32°F (days)	9	5	0.7	—	—	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	11	12	10	7	9	8
Days with high ≥ 90°F (days)	15	11	2	0.0	—	—
Days with low ≤ 32°F (days)	—	—	—	—	0.2	5

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	62	65	67	66	70	79	69	62	63	58	57	54
Clear days (≤ 30% cloud)	7	6	6	5	4	2	5	6	5	8	8	10
Partly cloudy days (30–70%)	9	8	8	9	8	6	7	10	11	10	9	10
Cloudy days (≥ 70%)	15	15	17	16	19	22	18	15	14	13	12	12
Relative humidity (%)	77	78	78	77	76	81	82	81	78	75	76	76
Wind speed (mph)	8.5	8.6	9.0	8.8	8.7	8.2	8.2	8.8	8.7	8.3	8.3	8.6

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	62	65	67	66	70	79
Clear days (≤ 30% cloud)	7	6	6	5	4	2
Partly cloudy days (30–70%)	9	8	8	9	8	6
Cloudy days (≥ 70%)	15	15	17	16	19	22
Relative humidity (%)	77	78	78	77	76	81
Wind speed (mph)	8.5	8.6	9.0	8.8	8.7	8.2

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	69	62	63	58	57	54
Clear days (≤ 30% cloud)	5	6	5	8	8	10
Partly cloudy days (30–70%)	7	10	11	10	9	10
Cloudy days (≥ 70%)	18	15	14	13	12	12
Relative humidity (%)	82	81	78	75	76	76
Wind speed (mph)	8.2	8.8	8.7	8.3	8.3	8.6

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 24 years of daily observations at Shanghai, a weather station, about 90 km from the city centre. The underlying daily records come from NOAA's global station network.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →