Climate averages 1991–2020

Kalmunai weather
in January.

A warm, very wet month: the coolest and the 10th driest of the year.

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

Average high 27.0°C Daytime mean, January

Average low 24.0°C Night-time mean, January

Rainfall 186 mm 18 days with ≥1 mm

Daylight 12 h Sunrise to sunset, per day

January is a warm month in Kalmunai: daytime highs average 27.0°C and nights cool to about 24.0°C. By daytime temperature it is the coolest month of the year.

Expect about 186 mm of rain on roughly 18 days, which makes January a very wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 45 min on an average January day.

The nearest other city in this atlas is Batticaloa (37 km away). In January its highs average 27.1°C, about as warm as Kalmunai, with 170 mm of rain.

Among the 12 cities listed in Sri Lanka, Kalmunai ranks 8th of 12 for the warmest January highs and 12th of 12 for the driest January (rainfall, lowest first). The mean January high of those 12 cities is 28.2°C; Kalmunai is 1.2°C cooler than that mean.

From January to February, average highs rise by 0.8°C to 27.8°C, and monthly rainfall falls from 186 mm to 96 mm.

The annual picture

January 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

Kalmunai climate table

1991–2020

Monthly climate averages for Kalmunai, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January, selected	27.0°C24.0°C	24.0°C	186	17.8	11.712 h
February	27.8°C24.1°C	24.1°C	96	13.2	11.912 h
March	29.5°C24.7°C	24.7°C	60	10.0	12.112 h
April	30.8°C25.8°C	25.8°C	70	13.3	12.312 h
May	32.3°C26.6°C	26.6°C	59	11.6	12.512 h
June	33.2°C26.6°C	26.6°C	31	6.7	12.513 h
July	33.2°C26.4°C	26.4°C	31	7.5	12.513 h
August	32.8°C26.1°C	26.1°C	42	9.3	12.412 h
September	32.0°C25.9°C	25.9°C	67	13.6	12.212 h
October	30.2°C25.2°C	25.2°C	164	20.8	12.012 h
November	28.2°C24.5°C	24.5°C	280	24.8	11.812 h
December	27.2°C24.2°C	24.2°C	310	22.6	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

January in nearby cities

Distance from Kalmunai

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