How many sunny days does San José have per year?

San José averages approximately 215 sunny days per year, based on historical climate data.

What is the air quality in San José?

San José has an annual PM2.5 concentration of 15.9 µg/m³, classified as "Moderate" by WHO standards. Above WHO targets. Some respiratory effects possible with prolonged exposure.

Alajuela Province

San José · Costa Rica

A city in Costa Rica.

Small city

31K

50m

22:30 UTC-6

CRC

Explore on map →Climate twin →

San José, Costa Rica is a 31K-resident city with 215 sunny days and 0 frost days annually and an annual PM2.5 of 15.9 µg/m³. A city in Costa Rica.

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Climate

Feels-like °C

Dinner outside

Climate Lab·San José

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	26	27	27	28	28	27	27	27	27	27	26	26	27
Daily mean°C	24	25	26	26	27	26	25	25	26	26	25	24	25
Daily low°C	23	23	23	24	25	24	24	24	24	24	24	23	24
Thermal comfort
High feelsDaily high feels-like°C	29	30	31	33	35	34	32	33	34	34	32	30	32
Mean feelsDaily mean feels-like°C	25	26	27	29	30	29	28	28	30	29	26	25	28
Low feelsDaily low feels-like°C	19	19	20	22	25	24	23	24	25	24	22	20	22
Humidity
HumidityRelative humidity%	83	79	76	73	82	86	86	86	85	86	87	83	83
Dewpoint°C	21.2	20.9	21.1	22.0	23.0	23.1	22.8	22.9	23.0	22.9	22.4	21.7	22.2
Precipitation
Rainfallmm	69	28	31	54	117	360	244	244	232	244	296	85	2002
Rain days≥1mm	22	11	13	17	25	30	31	30	30	30	28	23	290
Wind
Wind avgm/s	5.5	5.5	5.3	4.3	3.1	3.0	4.2	3.4	2.4	2.6	3.4	5.2	4.0
Wind gustsm/s	7.5	7.4	7.3	6.5	5.5	5.4	6.3	5.2	4.3	4.4	6.0	6.8	6.1
Sun & UV
Sunshinehrs/day	8.3	8.7	9.1	9.6	9.3	9.0	8.0	8.0	8.3	8.0	7.9	8.3	8.5
Clear skyindex	59%	65%	62%	40%	34%	27%	26%	25%	28%	29%	28%	48%	39%
UV indexmax avg	8.5	10.7	11.3	11.5	9.3	7.7	8.0	8.1	8.4	7.5	6.3	7.4	8.7

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

Confidence: High

Lifestyle Calendar·San José

Outdoor living in San José is seasonal. 4 months of the year are the toughest stretch. Dinner outside works 6/12 months, while walking works 7/12 months.

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Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Annual

6/12

Dinner Outside

73Jan: 73% viability

72Feb: 72% viability

74Mar: 74% viability

74Apr: 74% viability

63May: 63% viability

60Jun: 60% viability

64Jul: 64% viability

62Aug: 62% viability

61Sep: 61% viability

63Oct: 63% viability

66Nov: 66% viability

77Dec: 77% viability

6/12

Dinner Outside

73Jan: 73% viability

72Feb: 72% viability

74Mar: 74% viability

74Apr: 74% viability

63May: 63% viability

60Jun: 60% viability

64Jul: 64% viability

62Aug: 62% viability

61Sep: 61% viability

63Oct: 63% viability

66Nov: 66% viability

77Dec: 77% viability

67%

Humid

0/12

Lunch Outside

53Jan: 53% viability

56Feb: 56% viability

52Mar: 52% viability

37Apr: 37% viability

23May: 23% viability

16Jun: 16% viability

22Jul: 22% viability

19Aug: 19% viability

15Sep: 15% viability

16Oct: 16% viability

25Nov: 25% viability

42Dec: 42% viability

0/12

Lunch Outside

53Jan: 53% viability

56Feb: 56% viability

52Mar: 52% viability

37Apr: 37% viability

23May: 23% viability

16Jun: 16% viability

22Jul: 22% viability

19Aug: 19% viability

15Sep: 15% viability

16Oct: 16% viability

25Nov: 25% viability

42Dec: 42% viability

31%

Humid

7/12

Walking

93Jan: 93% viability

92Feb: 92% viability

85Mar: 85% viability

63Apr: 63% viability

48May: 48% viability

61Jun: 61% viability

83Jul: 83% viability

68Aug: 68% viability

52Sep: 52% viability

58Oct: 58% viability

83Nov: 83% viability

96Dec: 96% viability

7/12

Walking

93Jan: 93% viability

92Feb: 92% viability

85Mar: 85% viability

63Apr: 63% viability

48May: 48% viability

61Jun: 61% viability

83Jul: 83% viability

68Aug: 68% viability

52Sep: 52% viability

58Oct: 58% viability

83Nov: 83% viability

96Dec: 96% viability

74%

Rain

3/12

Running

85Jan: 85% viability

82Feb: 82% viability

64Mar: 64% viability

26Apr: 26% viability

22May: 22% viability

32Jun: 32% viability

52Jul: 52% viability

36Aug: 36% viability

25Sep: 25% viability

34Oct: 34% viability

63Nov: 63% viability

83Dec: 83% viability