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San José weather

San Jose · 335,007 inhabitants · Thursday, October 29 · updated 11:16

Air: Fair Moderate storm risk · Tomorrow, Sat, Sun

21°

Clear sky

Feels like 25°C

Wind

8 km/h

Gusts

10 km/h

Humidity

63 %

Pressure

1016 hPa

Clouds

9 %

Storm

Rise 05:26 Set 17:13 Day 11 h 47 min UV 6 · Moderate

Morning, afternoon, evening

Trend

Morning

Mainly clear

21°17°

Feels like 25°

Wind ↑ NE 8 km/h

Humidity 63 %

Afternoon

Drizzle

24°19°

Feels like 29°

Wind ↑ NE 7 km/h

Humidity 67 %

💧 0.2 mm

Evening

Drizzle

19°16°

Feels like 19°

Wind ↑ ENE 6 km/h

Humidity 91 %

💧 0.5 mm

12:00

24°

NNE 4

15:00

19°

0.2mm

NE 7

San José forecast in charts · next 7 days

The week ahead: highs and lows

▲ This week runs +1.6° warmer than usual

Highs Lows Usual for the season (1991–2020 average)

Hourly detail

Temperature (°C) Rain (mm) Wind (km/h)

San José climate: what a normal year looks like

A normal year brings roughly 3,320 mm of rain — more than 99% of the towns of 20,000+ people we compared it with.

The thermometer moves little from one season to the next: typical afternoon highs range from 22 °C in January to 24 °C in April, and the coolest nights (February) average 15 °C.

Days are almost the same length all year: 12 h 42 min of daylight in late June, 11 h 32 min in late December.

The coming week looks normal for October: forecast highs average 23 °C, against a usual 23 °C.

30-year averages (1991–2020)
Month	Typical high	Typical low	Rainfall
Jan	22 °C	15 °C	83 mm
Feb	23 °C	15 °C	57 mm
Mar	24 °C	15 °C	60 mm
Apr	24 °C	16 °C	117 mm
May	24 °C	17 °C	400 mm
Jun	23 °C	17 °C	437 mm
Jul	23 °C	17 °C	344 mm
Aug	23 °C	17 °C	411 mm
Sep	23 °C	16 °C	458 mm
Oct	23 °C	16 °C	487 mm
Nov	23 °C	16 °C	317 mm
Dec	22 °C	16 °C	149 mm
Whole year	23 °C	16 °C	3,320 mm

Source: our own processing of the ERA5 reanalysis (Copernicus/ECMWF) for 9.93° N, 84.08° W, 1991–2020. ERA5 averages over a 0.25° grid (about 25 km): hills, a coastline or the heat of the city itself can shift local values by a degree or two.

Air you breathe in San José: pollution and pollen

2/6

Fair

European Air Quality Index (EAQI), from Copernicus CAMS

PM2.516µg/m³

PM1019µg/m³

Copernicus CAMS model, updated several times a day.

Rain radar around San José

Rain observed over the last two hours by official weather radars around San José, followed by the radar forecast for the next hour where the weather service provides one.

Rain radar Last two hours, then forecast where available · drag the timeline

No open weather radar covers San José yet: the map shows our hour-by-hour rain forecast (ICON, GFS).

Moon over San José

Waning gibbous

87 % illuminated · 18.3 days

Rise 20:28 Set 08:48

Fri 30/10 79%

Sat 31/10 69%

Sun 1/11 59%

Mon 2/11 49% Last quarter

Tue 3/11 38%

Wed 4/11 28%

Thu 5/11 19%

Fri 6/11 12%

Sat 7/11 6%

Sun 8/11 2%

Mon 9/11 0%

Tue 10/11 1% New moon

Moonrise and moonset in local time (America/Costa_Rica); phase and lit fraction from a synodic calculation.

Look up a past day in San José

Curious about the weather in San José on a given day? Choose a date: we read it from the ERA5 reanalysis (ECMWF / Copernicus C3S), which runs until about a week ago.

San José weather at a glance

This page gathers everything about the weather in San José, San Jose: conditions now, the forecast for each part of the day and the trend for the coming week. At the moment the sky is “clear sky”, it is 21 °C (feels like 25 °C) and the wind blows at 8 km/h.

Expected range today: 14 °C to 24 °C and a dry sky; keep an eye on thunderstorms. The forecast comes from the AtmoAtlas engine, which combines ECMWF-AIFS, NOAA GFS and DWD ICON, adjusts cloud cover with METAR reports and uses convective energy (CAPE) to flag storms.

San José weather data for developers

Use the San José forecast in your own website or app: one JSON call returns weather, air quality, tides and sun and moon times. The free key needs no card.

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Where does this forecast come from? Our engine, checked every day against 1125 weather stations