San José is comfortable to be outside in almost any month: it rates Good or better for all year of the year. For sun, aim for late April to mid June.
When to go five ratings · thirty-six ten-day sections · click a cell to read it
For sun, go from late April to mid June, with a second spell in September. It peaks in mid September, at 62. Avoid mid January to early February for this: it falls to 26, mostly because it is too cool. The clearest skies come in February, when the sky is typically 31% covered at midday (mostly clear).
There is no bad time here for being outside: it rates Good or better in every part of the year. It is at its best in early December, at 77.
San José never quite rates Good for walking. It comes closest in early February, at 47, mostly because it is too warm. Avoid late April to mid June for this: it falls to 11, mostly because it is too warm.
The year, measured
The average temperature in San José over the whole year is 22°C. April is the hottest month, with highs of about 28°C; February is the coldest, with lows of about 19°C. The rainy (wet) season in San José runs from April to November, peaking in November with a 63% chance of rain on a given day. The dry season is December to January; January is the driest month, at 32%. Winds in San José are highest in February, averaging 6.4 m/s (23 km/h), and lightest in October, at 2.6 m/s (9 km/h). The prevailing wind is from the E. The clearest skies in San José come in February, when the sky is typically 30% covered; June is the cloudiest month, at 78%.
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 | 26°C | 19°C | 23°C | 32% | 37% | 5.7 m/s | 74 | 29 | 44 |
| February | 27°C | 19°C | 23°C | 49% | 30% | 6.4 m/s | 72 | 29 | 44 |
| March | 28°C | 20°C | 24°C | 47% | 38% | 5.7 m/s | 68 | 41 | 34 |
| April | 28°C | 21°C | 26°C | 59% | 58% | 4.4 m/s | 61 | 53 | 20 |
| May | 27°C | 21°C | 27°C | 61% | 73% | 3.1 m/s | 57 | 59 | 12 |
| June | 26°C | 20°C | 27°C | 59% | 78% | 2.9 m/s | 66 | 54 | 16 |
| July | 26°C | 21°C | 26°C | 57% | 74% | 3.7 m/s | 68 | 46 | 22 |
| August | 26°C | 20°C | 26°C | 54% | 74% | 3.1 m/s | 67 | 51 | 19 |
| September | 26°C | 20°C | 27°C | 58% | 78% | 2.7 m/s | 66 | 59 | 13 |
| October | 26°C | 20°C | 26°C | 61% | 76% | 2.6 m/s | 71 | 53 | 19 |
| November | 25°C | 20°C | 25°C | 63% | 69% | 3.1 m/s | 74 | 47 | 26 |
| December | 26°C | 20°C | 23°C | 39% | 45% | 4.9 m/s | 77 | 31 | 42 |
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 25°C at their warmest in November, its coolest month, and 28°C in April, its warmest; the coolest hours of the day run from 19°C to 21°C through the year, and the average temperature over the year is 22°C around the clock. Rain is most likely around November and least likely around January. 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
Winter in San José has typical daily highs of about 26°C and lows of about 20°C, with a 40% chance of rain on a given day.
San José weather in springMarch to May
Spring in San José has typical daily highs of about 28°C and lows of about 20°C, with a 55% chance of rain on a given day.
San José weather in summerJune to August
Summer in San José has typical daily highs of about 26°C and lows of about 21°C, with a 56% chance of rain on a given day.
San José weather in autumnSeptember to November
Autumn in San José has typical daily highs of about 26°C and lows of about 20°C, with a 61% chance of rain on a given day.
When is the rainy season in San José?
The rainy (wet) season in San José runs from April to November, peaking in November with a 63% chance of rain on a given day. The dry season is December to January; January is the driest month, at 32%.
What time of year is San José windiest?
Winds in San José are highest in February, averaging 6.4 m/s (23 km/h), and lightest in October, at 2.6 m/s (9 km/h). The prevailing wind is from the E.
What is the average temperature in San José year round?
The average temperature in San José over the whole year is 22°C. April is the hottest month, with highs of about 28°C; February is the coldest, with lows of about 19°C.
Where to go instead in mid May, the weakest time here for walking
How this is worked out
Every figure is a decade of weather-station observations blended into one typical year, in ten-day sections. The ratings, the chart and the feels-like column are read at midday local solar time. Being outside is the Easy outdoors rating, Sun is Sunbathing and Walking is Active outdoors, each out of 100: Good from 55, Ideal from 80. They describe what a time of year is usually like here, not a forecast. The dotted links open the map at that time of year; set its time of day to midday to see these numbers.