How many sunny days does Jaffna have per year?

Jaffna averages approximately 256 sunny days per year, based on historical climate data.

What is the air quality in Jaffna?

Jaffna has an annual PM2.5 concentration of 17.4 µg/m³, classified as "Moderate" by WHO standards. Above WHO targets. Some respiratory effects possible with prolonged exposure.

Northern Province

Jaffna · Sri Lanka

Sri Lanka's second-largest city.

Photo by Matthijs Idema on Unsplash

Small city

199K

77 km²

09:36 UTC+5.5

LKR

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Jaffna, Sri Lanka is a 199K-resident city with 256 sunny days and 0 frost days annually and an annual PM2.5 of 17.4 µg/m³. Sri Lanka's second-largest city.

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Climate

Feels-like °C

Dinner outside

Climate Lab·Jaffna

Monthly climate metrics across temperature, precipitation, wind, and UV.

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Metric	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Temperature
Daily high°C	28	28	30	31	31	30	30	30	29	29	28	28	29
Daily mean°C	27	27	28	30	30	29	29	29	29	28	27	27	28
Daily low°C	26	26	27	28	29	29	28	28	28	27	26	26	27
Thermal comfort
High feelsDaily high feels-like°C	30	30	34	35	35	32	33	32	32	33	32	30	32
Mean feelsDaily mean feels-like°C	27	27	30	32	32	30	30	29	29	29	27	27	29
Low feelsDaily low feels-like°C	22	22	24	28	28	27	26	25	25	26	24	22	25
Humidity
HumidityRelative humidity%	77	74	74	76	79	80	79	80	80	80	85	82	79
Dewpoint°C	22.6	21.8	23.6	25.0	25.8	25.4	25.0	24.9	24.8	24.4	24.2	23.3	24.2
Precipitation
Rainfallmm	38	15	14	52	102	6	7	27	30	146	642	194	1272
Rain days≥1mm	9	5	5	8	10	2	2	9	11	18	28	20	127
Wind
Wind avgm/s	5.7	5.8	4.6	3.9	6.7	7.6	6.6	6.5	7.2	4.3	5.0	5.9	5.8
Wind gustsm/s	8.1	8.1	6.6	6.8	10.7	10.0	10.2	10.0	10.1	9.8	8.2	8.6	8.9
Sun & UV
Sunshinehrs/day	9.4	9.9	10.2	10.3	10.2	10.2	10.0	10.0	9.2	9.1	8.0	8.9	9.6
Clear skyindex	38%	66%	60%	65%	41%	39%	31%	33%	41%	35%	28%	36%	43%
UV indexmax avg	8.5	9.9	10.8	10.6	9.6	9.6	9.5	10.7	10.4	8.9	6.6	7.1	9.4

Based on 2014–2024 hourly climate data · Updated Mar 2025

Confidence: High

Lifestyle Calendar·Jaffna

Outdoor living in Jaffna is seasonal. 5 months of the year are the toughest stretch. Even dinner outside manages 2/12 months, while walking works 7/12 months.

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Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Annual

2/12

Dinner Outside

68Jan: 68% viability

69Feb: 69% viability

58Mar: 58% viability

40Apr: 40% viability

39May: 39% viability

24Jun: 24% viability

37Jul: 37% viability

40Aug: 40% viability

31Sep: 31% viability

40Oct: 40% viability

42Nov: 42% viability

54Dec: 54% viability

2/12

Dinner Outside

68Jan: 68% viability

69Feb: 69% viability

58Mar: 58% viability

40Apr: 40% viability

39May: 39% viability

24Jun: 24% viability

37Jul: 37% viability

40Aug: 40% viability

31Sep: 31% viability

40Oct: 40% viability

42Nov: 42% viability

54Dec: 54% viability

45%

Humid

0/12

Lunch Outside

38Jan: 38% viability

48Feb: 48% viability

38Mar: 38% viability

17Apr: 17% viability

14May: 14% viability

17Jun: 17% viability

16Jul: 16% viability

16Aug: 16% viability

15Sep: 15% viability

11Oct: 11% viability

10Nov: 10% viability

19Dec: 19% viability

0/12

Lunch Outside

38Jan: 38% viability

48Feb: 48% viability

38Mar: 38% viability

17Apr: 17% viability

14May: 14% viability

17Jun: 17% viability

16Jul: 16% viability

16Aug: 16% viability

15Sep: 15% viability

11Oct: 11% viability

10Nov: 10% viability

19Dec: 19% viability

22%

Humid

7/12

Walking

92Jan: 92% viability

90Feb: 90% viability

69Mar: 69% viability

34Apr: 34% viability

24May: 24% viability

52Jun: 52% viability

57Jul: 57% viability

66Aug: 66% viability

54Sep: 54% viability

70Oct: 70% viability

79Nov: 79% viability

78Dec: 78% viability

7/12

Walking

92Jan: 92% viability

90Feb: 90% viability

69Mar: 69% viability

34Apr: 34% viability

24May: 24% viability

52Jun: 52% viability

57Jul: 57% viability

66Aug: 66% viability

54Sep: 54% viability

70Oct: 70% viability

79Nov: 79% viability

78Dec: 78% viability

64%

Humid

3/12

Running

82Jan: 82% viability

80Feb: 80% viability

31Mar: 31% viability

3Apr: 3% viability

3May: 3% viability

8Jun: 8% viability

16Jul: 16% viability

27Aug: 27% viability

29Sep: 29% viability

32Oct: 32% viability

55Nov: 55% viability

70Dec: 70% viability

3/12

Running

82Jan: 82% viability

80Feb: 80% viability

31Mar: 31% viability

3Apr: 3% viability

3May: 3% viability

8Jun: 8% viability

16Jul: 16% viability

27Aug: 27% viability

29Sep: 29% viability

32Oct: 32% viability

55Nov: 55% viability

70Dec: 70% viability

36%

Humid

Tap any month for details · Click activity name for overview

ComfortableModerateUncomfortable

Based on 2014–2024 hourly climate data · Updated Mar 2025

Confidence: High

Jaffna · Sri Lanka

Climate

Climate Lab·Jaffna

Lifestyle Calendar·Jaffna

Air Quality Profile

Air Quality Profile

Who thrives in Jaffna

Things to consider in Jaffna

Why not Jaffna?

Frequently asked about Jaffna