Climate averages 1991–2020

Rui’an weather
in December.

A cool, moderately wet month: the 10th warmest and the driest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 14.1°C Daytime mean, December
Average low 7.7°C Night-time mean, December
Rainfall 64 mm 9 days with ≥1 mm
Daylight 10 h Sunrise to sunset, per day
Every month in Rui’an · average highYear overview

December is a cool month in Rui’an: daytime highs average 14.1°C and nights cool to about 7.7°C. By daytime temperature it is the 10th warmest of the 12 months.

Expect about 64 mm of rain on roughly 9 days, which makes December a moderately wet month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 10 h 25 min on an average December day.

The nearest other city in this atlas is Wenzhou (25 km away). In December its highs average 14.2°C, about as warm as Rui’an, with 64 mm of rain.

Among the 884 cities listed in China, Rui’an ranks joint 159th of 884 for the warmest December highs and joint 849th of 884 for the driest December (rainfall, lowest first). The mean December high of those 884 cities is 7.5°C; Rui’an is 6.6°C warmer than that mean.

From December to January, average highs fall by 2.3°C to 11.8°C, and monthly rainfall rises from 64 mm to 70 mm.

The annual picture

December in context

30-year average
Average highAverage low°C
Average daily high and low temperatures by month The same values are available in the monthly table below. Lines show mean daily maxima and minima, not a forecast interval. 05101520253035 JanFebMarAprMayJunJulAugSepOctNovDec

Monthly rainfall

Average total · mm
Average monthly rainfall totalsEach bar is a mean monthly total over 1991–2020. Full numbers are in the table. JanFebMarAprMayJunJulAugSepOctNovDec 3000

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Rui’an climate table

1991–2020
Monthly climate averages for Rui’an, 1991–2020
MonthAverage highHigh / lowAverage lowRainfall mm/monthRain days ≥1 mm/dayDaylight hours/dayDay­light h/day
January 11.8°C5.8°C5.8°C7010.010.611 h
February 12.7°C6.6°C6.6°C7611.611.211 h
March 15.3°C9.3°C9.3°C12515.012.012 h
April 19.6°C13.6°C13.6°C12414.412.813 h
May 23.8°C18.6°C18.6°C17414.513.514 h
June 27.1°C22.8°C22.8°C26115.913.914 h
July 30.0°C25.8°C25.8°C15313.713.714 h
August 30.0°C25.8°C25.8°C22818.013.113 h
September 27.5°C23.0°C23.0°C17314.412.312 h
October 23.6°C18.1°C18.1°C887.611.512 h
November 19.1°C13.3°C13.3°C839.710.811 h
December, selected 14.1°C7.7°C7.7°C648.910.410 h

Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.

Compare places

December in nearby cities

Distance from Rui’an

Read the numbers correctly

Climate, not a promise.

These patterns help compare months. They cannot tell you the weather on a specific day of your trip.

Sources, method and limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Rui’an) is explained once on the Rui’an year overview and on the Sources, method and limits page.