Climate averages 1991–2020

Batticaloa weather
in May.

A hot, moderately wet month: the 4th warmest and the 5th driest of the year.

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

Average high 33.4°C Daytime mean, May

Average low 26.2°C Night-time mean, May

Rainfall 50 mm 9 days with ≥1 mm

Daylight 12 h Sunrise to sunset, per day

May is a hot month in Batticaloa: daytime highs average 33.4°C and nights cool to about 26.2°C. By daytime temperature it is the 4th warmest of the 12 months.

Expect about 50 mm of rain on roughly 9 days, which makes May a moderately wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 28 min on an average May day.

The nearest other city in this atlas is Kalmunai (37 km away). In May its highs average 32.3°C, 1.1°C cooler than Batticaloa, with 59 mm of rain.

Among the 12 cities listed in Sri Lanka, Batticaloa ranks 2nd of 12 for the warmest May highs and 3rd of 12 for the driest May (rainfall, lowest first). The mean May high of those 12 cities is 30.6°C; Batticaloa is 2.8°C warmer than that mean.

From May to June, average highs rise by 1.1°C to 34.5°C, and monthly rainfall falls from 50 mm to 25 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

Batticaloa climate table

1991–2020

Monthly climate averages for Batticaloa, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	27.1°C23.2°C	23.2°C	170	15.7	11.712 h
February	28.2°C23.3°C	23.3°C	89	11.2	11.912 h
March	30.2°C24.0°C	24.0°C	52	8.2	12.112 h
April	31.8°C25.3°C	25.3°C	59	10.5	12.312 h
May, selected	33.4°C26.2°C	26.2°C	50	9.3	12.512 h
June	34.5°C26.6°C	26.6°C	25	5.3	12.613 h
July	34.5°C26.5°C	26.5°C	24	5.8	12.513 h
August	34.2°C26.1°C	26.1°C	31	7.3	12.412 h
September	33.2°C25.6°C	25.6°C	48	11.1	12.212 h
October	31.0°C24.8°C	24.8°C	152	18.9	12.012 h
November	28.5°C24.0°C	24.0°C	283	23.6	11.812 h
December	27.3°C23.5°C	23.5°C	302	21.6	11.712 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 Batticaloa

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