Annual mean 15°C · wettest around March · prevailing wind NE
Warmest
22.2 °C
Coldest
17.9 °C
Wettest
45%
Windiest
4.3 m/s
Prevailing
NE
3.1 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in San José over the whole year is 15°C. May is the hottest month, with highs of about 20°C; September is the coldest, with lows of about 11°C. The rainy (wet) season in San José runs from March to May, peaking in March with a 47% chance of rain on a given day. The dry season is June to October; August is the driest month, at 18%. Winds in San José are highest in July, averaging 2.4 m/s (9 km/h), and lightest in March, at 1.5 m/s (5 km/h). The prevailing wind is from the NE. The clearest skies in San José come in September, when the sky is typically 70% covered; March is the cloudiest month, at 83%.
Month by month San José climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
19°C
11°C
17°C
31%
78%
1.9 m/s
60
4
80
February
18°C
12°C
17°C
32%
81%
1.6 m/s
58
4
79
March
18°C
12°C
17°C
47%
83%
1.5 m/s
59
4
79
April
19°C
12°C
17°C
37%
81%
1.7 m/s
59
5
78
May
20°C
12°C
17°C
35%
80%
1.8 m/s
55
6
76
June
18°C
11°C
16°C
20%
78%
2.1 m/s
48
4
79
July
18°C
11°C
15°C
23%
73%
2.4 m/s
44
4
78
August
19°C
13°C
15°C
18%
72%
2.2 m/s
44
3
77
September
19°C
11°C
16°C
24%
70%
2.2 m/s
48
5
77
October
19°C
11°C
17°C
30%
77%
1.7 m/s
59
5
77
November
19°C
12°C
17°C
34%
78%
1.7 m/s
63
4
79
December
18°C
12°C
17°C
25%
80%
1.8 m/s
58
3
81
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short San José weather by season
Year round, San José has days of about 18°C at their warmest in June, its coolest month, and 20°C in May, its warmest; the coolest hours of the day run from 11°C to 13°C through the year, and the average temperature over the year is 15°C around the clock. Rain is most likely around March and least likely around August. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
San José weather in winterDecember to February
High 18°CLow 12°CRain 29%
Winter in San José has typical daily highs of about 18°C and lows of about 12°C, with a 29% chance of rain on a given day.
San José weather in springMarch to May
High 19°CLow 12°CRain 40%
Spring in San José has typical daily highs of about 19°C and lows of about 12°C, with a 40% chance of rain on a given day.
San José weather in summerJune to August
High 18°CLow 12°CRain 21%
Summer in San José has typical daily highs of about 18°C and lows of about 12°C, with a 21% chance of rain on a given day.
San José weather in autumnSeptember to November
High 19°CLow 11°CRain 30%
Autumn in San José has typical daily highs of about 19°C and lows of about 11°C, with a 30% chance of rain on a given day.
When is the rainy season in San José?
The rainy (wet) season in San José runs from March to May, peaking in March with a 47% chance of rain on a given day. The dry season is June to October; August is the driest month, at 18%.
What time of year is San José windiest?
Winds in San José are highest in July, averaging 2.4 m/s (9 km/h), and lightest in March, at 1.5 m/s (5 km/h). The prevailing wind is from the NE.
What is the average temperature in San José year round?
The average temperature in San José over the whole year is 15°C. May is the hottest month, with highs of about 20°C; September is the coldest, with lows of about 11°C.