Climate averages 1991–2020

Đồng Hới weather
in May.

A hot, wet month: the 4th warmest and the 6th driest of the year.

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

Average high 30.9°C Daytime mean, May

Average low 25.8°C Night-time mean, May

Rainfall 112 mm 15 days with ≥1 mm

Daylight 13 h Sunrise to sunset, per day

May is a hot month in Đồng Hới: daytime highs average 30.9°C and nights cool to about 25.8°C. By daytime temperature it is the 4th warmest of the 12 months.

Expect about 112 mm of rain on roughly 15 days, which makes May a wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 56 min on an average May day.

The nearest other city in this atlas is Ba Đồn (38 km away). In May its highs average 31.4°C, about as warm as Đồng Hới, with 103 mm of rain.

Among the 136 cities listed in Vietnam, Đồng Hới ranks joint 90th of 136 for the warmest May highs and 8th of 136 for the driest May (rainfall, lowest first). The mean May high of those 136 cities is 31.2°C; Đồng Hới is 0.3°C cooler than that mean.

From May to June, average highs rise by 1.8°C to 32.7°C, and monthly rainfall falls from 112 mm to 63 mm.

The annual picture

May in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

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

Every month, side by side

Đồng Hới climate table

1991–2020

Monthly climate averages for Đồng Hới, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	21.5°C18.3°C	18.3°C	125	17.4	11.211 h
February	22.6°C18.9°C	18.9°C	77	13.9	11.612 h
March	25.1°C20.9°C	20.9°C	82	13.3	12.012 h
April	28.3°C23.4°C	23.4°C	88	12.8	12.513 h
May, selected	30.9°C25.8°C	25.8°C	112	14.6	12.913 h
June	32.7°C27.4°C	27.4°C	63	8.1	13.213 h
July	32.4°C27.1°C	27.1°C	94	10.0	13.113 h
August	31.6°C26.7°C	26.7°C	146	13.4	12.713 h
September	29.4°C25.5°C	25.5°C	345	19.5	12.212 h
October	26.8°C23.7°C	23.7°C	531	24.0	11.812 h
November	24.8°C22.0°C	22.0°C	366	20.9	11.311 h
December	22.0°C19.4°C	19.4°C	228	20.3	11.111 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

May in nearby cities

Distance from Đồng Hới

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 Đồng Hới) is explained once on the Đồng Hới year overview and on the Sources, method and limits page.