How many sunny days does San Isidro have per year?

San Isidro averages approximately 166 sunny days per year, based on historical climate data.

What is the air quality in San Isidro?

San Isidro has an annual PM2.5 concentration of 15.5 µg/m³, classified as "Moderate" by WHO standards. Above WHO targets. Some respiratory effects possible with prolonged exposure.

San José

San Isidro · Costa Rica

A city in Costa Rica.

Small city

35K

713m

22:29 UTC-6

CRC

Explore on map →Climate twin →

San Isidro, Costa Rica is a 35K-resident city with 166 sunny days and 0 frost days annually and an annual PM2.5 of 15.5 µg/m³. A city in Costa Rica.

Find your city match in 5 minutes

Take the quiz

Climate

Feels-like °C

Dinner outside

Climate Lab·San Isidro

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

Full page →

Metric	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Temperature
Daily high°C	23	24	24	24	25	24	24	24	24	24	23	24	24
Daily mean°C	22	23	23	23	24	23	23	23	23	23	22	22	23
Daily low°C	21	22	22	22	23	22	22	22	21	22	21	21	22
Thermal comfort
High feelsDaily high feels-like°C	32	33	32	32	33	32	32	32	32	32	31	32	32
Mean feelsDaily mean feels-like°C	30	31	31	29	29	28	28	27	28	27	26	29	29
Low feelsDaily low feels-like°C	20	22	22	23	24	23	22	22	22	22	22	21	22
Humidity
HumidityRelative humidity%	82	79	79	83	88	88	88	88	88	89	89	86	86
Dewpoint°C	19.2	19.6	19.2	20.3	21.0	20.9	20.6	20.6	20.5	20.5	20.4	19.8	20.2
Precipitation
Rainfallmm	47	11	51	197	411	408	323	366	563	427	420	87	3312
Rain days≥1mm	14	1	20	24	31	30	31	31	30	31	30	20	293
Wind
Wind avgm/s	1.2	1.4	1.2	1.2	1.4	1.4	1.4	1.5	1.4	1.5	1.5	1.1	1.4
Wind gustsm/s	2.7	3.0	2.7	2.5	2.7	2.9	2.7	3.0	2.7	2.9	3.0	2.6	2.8
Sun & UV
Sunshinehrs/day	9.3	9.6	9.6	9.0	8.0	7.0	7.0	8.0	7.0	6.0	7.0	9.1	8.0
Clear skyindex	54%	69%	57%	27%	22%	18%	21%	18%	18%	17%	20%	44%	32%
UV indexmax avg	8.9	10.6	11.4	9.8	7.6	7.2	7.2	7.3	7.7	7.3	6.3	7.4	8.2

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

Confidence: High

Lifestyle Calendar·San Isidro

San Isidro offers a solid outdoor season. Dinner outside is comfortable 12/12 months — impressive, while walking is comfortable 12/12 months — impressive.

Full page →

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Annual

12/12

Dinner Outside

92Jan: 92% viability

92Feb: 92% viability

90Mar: 90% viability

82Apr: 82% viability

77May: 77% viability

74Jun: 74% viability

76Jul: 76% viability

77Aug: 77% viability

77Sep: 77% viability

76Oct: 76% viability

78Nov: 78% viability

87Dec: 87% viability

12/12

Dinner Outside

92Jan: 92% viability

92Feb: 92% viability

90Mar: 90% viability

82Apr: 82% viability

77May: 77% viability

74Jun: 74% viability

76Jul: 76% viability

77Aug: 77% viability

77Sep: 77% viability

76Oct: 76% viability

78Nov: 78% viability

87Dec: 87% viability

82%

0/12

Lunch Outside

44Jan: 44% viability

47Feb: 47% viability

44Mar: 44% viability

27Apr: 27% viability

19May: 19% viability

14Jun: 14% viability

17Jul: 17% viability

17Aug: 17% viability

15Sep: 15% viability

15Oct: 15% viability

18Nov: 18% viability

29Dec: 29% viability

0/12

Lunch Outside

44Jan: 44% viability

47Feb: 47% viability

44Mar: 44% viability

27Apr: 27% viability

19May: 19% viability

14Jun: 14% viability

17Jul: 17% viability

17Aug: 17% viability

15Sep: 15% viability

15Oct: 15% viability

18Nov: 18% viability

29Dec: 29% viability

26%

Rain

12/12

Walking

79Jan: 79% viability

71Feb: 71% viability

73Mar: 73% viability

73Apr: 73% viability

68May: 68% viability

82Jun: 82% viability

85Jul: 85% viability

84Aug: 84% viability

80Sep: 80% viability

84Oct: 84% viability

91Nov: 91% viability

89Dec: 89% viability

12/12

Walking

79Jan: 79% viability

71Feb: 71% viability

73Mar: 73% viability

73Apr: 73% viability

68May: 68% viability

82Jun: 82% viability

85Jul: 85% viability

84Aug: 84% viability

80Sep: 80% viability

84Oct: 84% viability

91Nov: 91% viability

89Dec: 89% viability

80%

Rain

1/12

Running

34Jan: 34% viability

22Feb: 22% viability

23Mar: 23% viability

32Apr: 32% viability

37May: 37% viability

52Jun: 52% viability

53Jul: 53% viability

58Aug: 58% viability

52Sep: 52% viability

59Oct: 59% viability

72Nov: 72% viability

48Dec: 48% viability

1/12

Running

34Jan: 34% viability

22Feb: 22% viability

23Mar: 23% viability

32Apr: 32% viability

37May: 37% viability

52Jun: 52% viability

53Jul: 53% viability

58Aug: 58% viability

52Sep: 52% viability

59Oct: 59% viability

72Nov: 72% viability

48Dec: 48% viability

45%

Rain

Tap any month for details · Click activity name for overview

ComfortableModerateUncomfortable

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

Confidence: High

San Isidro · Costa Rica

Climate

Climate Lab·San Isidro

Lifestyle Calendar·San Isidro

Air Quality Profile

Air Quality Profile

Who thrives in San Isidro

Things to consider in San Isidro

Why not San Isidro?

Frequently asked about San Isidro