How many sunny days does Surabaya have per year?

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

What is the air quality in Surabaya?

Surabaya has an annual PM2.5 concentration of 33.5 µg/m³, classified as "Poor" by WHO standards. Significantly above WHO targets. Increased health risk, especially outdoors.

East Java

Surabaya · Indonesia

Indonesia's second-largest city.

Photo by muhammad arief on Unsplash

Large city

6.9M

1,304 km²

05:25 UTC+7

IDR

Explore on map →Climate twin →

Surabaya enjoys 256 sunny days a year. Summers are intensely hot — air conditioning is essential. On the other hand, air quality is a concern.

Surabaya, Indonesia is a 6.9M-resident city with 256 sunny days and 0 frost days annually and an annual PM2.5 of 33.5 µg/m³. Indonesia's second-largest city.

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Climate

Feels-like °C

Dinner outside

Climate Lab · Surabaya

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

Metric	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Temperature
Daily high°C	32	31	32	32	32	32	32	32	33	33	33	32	32
Daily mean°C	29	28	29	30	30	30	29	30	30	30	30	29	29
Daily low°C	26	26	26	27	27	27	26	26	27	28	28	27	27
Thermal comfort
High feelsDaily high feels-like°C	36	35	37	37	37	36	36	36	37	37	37	36	36
Mean feelsDaily mean feels-like°C	31	31	32	34	34	33	32	33	34	34	34	31	33
Low feelsDaily low feels-like°C	26	26	28	28	28	27	26	26	27	28	29	27	27
Humidity
HumidityRelative humidity%	80	83	79	78	72	71	67	65	62	68	73	80	73
Dewpoint°C	24.5	24.6	24.9	25.1	24.5	23.9	22.5	22.1	22.4	23.6	24.7	24.8	24.0
Precipitation
Rainfallmm	296	333	232	245	78	39	19	7	29	66	222	363	1928
Rain days≥1mm	29	28	29	27	14	11	5	1	8	13	27	29	221
Wind
Wind avgm/s	2.1	2.3	1.6	1.4	1.9	1.8	2.1	2.6	2.3	1.5	1.4	1.7	1.9
Wind gustsm/s	5.2	4.5	3.5	3.1	3.6	3.6	3.8	4.6	4.2	3.1	3.1	4.5	3.9
Sun & UV
Sunshinehrs/day	9.0	9.7	9.3	9.0	9.9	9.9	10.1	10.3	10.0	10.0	10.0	9.0	9.7
Clear skyindex	21%	25%	33%	40%	52%	52%	61%	74%	60%	39%	34%	22%	43%
UV indexmax avg	8.4	9.0	8.8	8.8	8.1	7.8	9.2	10.7	11.9	10.5	8.5	8.2	9.2

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

Confidence: High

Lifestyle Calendar · Surabaya

Outdoor activities in Surabaya are challenging most of the year. February through January are the toughest stretch. Dinner Outside manages 0/12 comfortable months.

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Annual

0/12

Dinner Outside

37Jan: 37% viability

35Feb: 35% viability

38Mar: 38% viability

39Apr: 39% viability

42May: 42% viability

46Jun: 46% viability

60Jul: 60% viability

64Aug: 64% viability

60Sep: 60% viability

50Oct: 50% viability

40Nov: 40% viability

35Dec: 35% viability

0/12

Dinner Outside

37Jan: 37% viability

35Feb: 35% viability

38Mar: 38% viability

39Apr: 39% viability

42May: 42% viability

46Jun: 46% viability

60Jul: 60% viability

64Aug: 64% viability

60Sep: 60% viability

50Oct: 50% viability

40Nov: 40% viability

35Dec: 35% viability

46%

Humid

0/12

Lunch Outside

6Jan: 6% viability

5Feb: 5% viability

8Mar: 8% viability

10Apr: 10% viability

19May: 19% viability

25Jun: 25% viability

46Jul: 46% viability

55Aug: 55% viability

48Sep: 48% viability

28Oct: 28% viability

11Nov: 11% viability

6Dec: 6% viability

0/12

Lunch Outside

6Jan: 6% viability

5Feb: 5% viability

8Mar: 8% viability

10Apr: 10% viability

19May: 19% viability

25Jun: 25% viability

46Jul: 46% viability

55Aug: 55% viability

48Sep: 48% viability

28Oct: 28% viability

11Nov: 11% viability

6Dec: 6% viability

22%

Humid

0/12

Walking

42Jan: 42% viability

50Feb: 50% viability

28Mar: 28% viability

16Apr: 16% viability

16May: 16% viability

22Jun: 22% viability

31Jul: 31% viability

27Aug: 27% viability

16Sep: 16% viability

16Oct: 16% viability

20Nov: 20% viability

30Dec: 30% viability

0/12

Walking

42Jan: 42% viability

50Feb: 50% viability

28Mar: 28% viability

16Apr: 16% viability

16May: 16% viability

22Jun: 22% viability

31Jul: 31% viability

27Aug: 27% viability

16Sep: 16% viability

16Oct: 16% viability

20Nov: 20% viability

30Dec: 30% viability

26%

Humid

0/12

Running

11Jan: 11% viability

13Feb: 13% viability

4Mar: 4% viability

1Apr: 1% viability

1May: 1% viability

1Jun: 1% viability

1Jul: 1% viability

0Aug: 0% viability

1Sep: 1% viability

1Oct: 1% viability

2Nov: 2% viability

8Dec: 8% viability

0/12

Running

11Jan: 11% viability

13Feb: 13% viability

4Mar: 4% viability

1Apr: 1% viability

1May: 1% viability

1Jun: 1% viability

1Jul: 1% viability

0Aug: 0% viability

1Sep: 1% viability

1Oct: 1% viability

2Nov: 2% viability

8Dec: 8% viability

Humid

Tap any month for details · Click activity name for overview

ComfortableModerateUncomfortable

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

Confidence: High

Climate

Feels-like °C

Dinner outside

Climate Lab · Surabaya

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

Metric	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Temperature
Daily high°C	32	31	32	32	32	32	32	32	33	33	33	32	32
Daily mean°C	29	28	29	30	30	30	29	30	30	30	30	29	29
Daily low°C	26	26	26	27	27	27	26	26	27	28	28	27	27
Thermal comfort
High feelsDaily high feels-like°C	36	35	37	37	37	36	36	36	37	37	37	36	36
Mean feelsDaily mean feels-like°C	31	31	32	34	34	33	32	33	34	34	34	31	33
Low feelsDaily low feels-like°C	26	26	28	28	28	27	26	26	27	28	29	27	27
Humidity
HumidityRelative humidity%	80	83	79	78	72	71	67	65	62	68	73	80	73
Dewpoint°C	24.5	24.6	24.9	25.1	24.5	23.9	22.5	22.1	22.4	23.6	24.7	24.8	24.0
Precipitation
Rainfallmm	296	333	232	245	78	39	19	7	29	66	222	363	1928
Rain days≥1mm	29	28	29	27	14	11	5	1	8	13	27	29	221
Wind
Wind avgm/s	2.1	2.3	1.6	1.4	1.9	1.8	2.1	2.6	2.3	1.5	1.4	1.7	1.9
Wind gustsm/s	5.2	4.5	3.5	3.1	3.6	3.6	3.8	4.6	4.2	3.1	3.1	4.5	3.9
Sun & UV
Sunshinehrs/day	9.0	9.7	9.3	9.0	9.9	9.9	10.1	10.3	10.0	10.0	10.0	9.0	9.7
Clear skyindex	21%	25%	33%	40%	52%	52%	61%	74%	60%	39%	34%	22%	43%
UV indexmax avg	8.4	9.0	8.8	8.8	8.1	7.8	9.2	10.7	11.9	10.5	8.5	8.2	9.2

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

Confidence: High

Lifestyle Calendar · Surabaya

Outdoor activities in Surabaya are challenging most of the year. February through January are the toughest stretch. Dinner Outside manages 0/12 comfortable months.

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Annual

0/12

Dinner Outside

37Jan: 37% viability

35Feb: 35% viability

38Mar: 38% viability

39Apr: 39% viability

42May: 42% viability

46Jun: 46% viability

60Jul: 60% viability

64Aug: 64% viability

60Sep: 60% viability

50Oct: 50% viability

40Nov: 40% viability

35Dec: 35% viability

0/12

Dinner Outside

37Jan: 37% viability

35Feb: 35% viability

38Mar: 38% viability

39Apr: 39% viability

42May: 42% viability

46Jun: 46% viability

60Jul: 60% viability

64Aug: 64% viability

60Sep: 60% viability

50Oct: 50% viability

40Nov: 40% viability

35Dec: 35% viability

46%

Humid

0/12

Lunch Outside

6Jan: 6% viability

5Feb: 5% viability

8Mar: 8% viability

10Apr: 10% viability

19May: 19% viability

25Jun: 25% viability

46Jul: 46% viability

55Aug: 55% viability

48Sep: 48% viability

28Oct: 28% viability

11Nov: 11% viability

6Dec: 6% viability

0/12

Lunch Outside

6Jan: 6% viability

5Feb: 5% viability

8Mar: 8% viability

10Apr: 10% viability

19May: 19% viability

25Jun: 25% viability

46Jul: 46% viability

55Aug: 55% viability

48Sep: 48% viability

28Oct: 28% viability

11Nov: 11% viability

6Dec: 6% viability

22%

Humid

0/12

Walking

42Jan: 42% viability

50Feb: 50% viability

28Mar: 28% viability

16Apr: 16% viability

16May: 16% viability

22Jun: 22% viability

31Jul: 31% viability

27Aug: 27% viability

16Sep: 16% viability

16Oct: 16% viability

20Nov: 20% viability

30Dec: 30% viability

0/12

Walking

42Jan: 42% viability

50Feb: 50% viability

28Mar: 28% viability

16Apr: 16% viability

16May: 16% viability

22Jun: 22% viability

31Jul: 31% viability

27Aug: 27% viability

16Sep: 16% viability

16Oct: 16% viability

20Nov: 20% viability

30Dec: 30% viability

26%

Humid

0/12

Running

11Jan: 11% viability

13Feb: 13% viability

4Mar: 4% viability

1Apr: 1% viability

1May: 1% viability

1Jun: 1% viability

1Jul: 1% viability

0Aug: 0% viability

1Sep: 1% viability

1Oct: 1% viability

2Nov: 2% viability

8Dec: 8% viability

0/12

Running

11Jan: 11% viability

13Feb: 13% viability

4Mar: 4% viability

1Apr: 1% viability

1May: 1% viability

1Jun: 1% viability

1Jul: 1% viability

0Aug: 0% viability

1Sep: 1% viability

1Oct: 1% viability

2Nov: 2% viability

8Dec: 8% viability

Humid

Tap any month for details · Click activity name for overview

ComfortableModerateUncomfortable

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

Confidence: High

Surabaya · Indonesia

Climate

Climate Lab · Surabaya

Lifestyle Calendar · Surabaya

Climate

Climate Lab · Surabaya

Lifestyle Calendar · Surabaya

Air Quality Profile

Air Quality Profile

Who thrives in Surabaya

Things to consider in Surabaya

Why not Surabaya?

Frequently asked about Surabaya

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