Cities / Costa Rica / Alajuela Province

18°

☁️ San Juan weather

Overcast. No rain expected in the next few hours.

Feels like 20° Wind 6 km/h NE Humidity 98% UV 0 Air Fair ☀ 05:27 - 17:45

Right now it is 18° in San Juan with overcast skies, today's high is 25° with an overnight low of 17° and about 2 mm of rain is expected. The sun rises at 05:27 and sets at 17:45, giving 12h 18m of daylight. Over the coming week highs range from 23° to 26° - a steady stretch with little day-to-day change.

San Juan is in Alajuela Province, Costa Rica, sitting 1,033 m above sea level. Local time is America/Costa_Rica (UTC−6), and every time on this page is shown in it.

Next 24 hours - temperature

16° 21° 25° 25° 17° 19:00 · 18.4° · 0 mm 20:00 · 18.1° · 0 mm 21:00 · 17.9° · 0 mm 22:00 · 17.7° · 0 mm 23:00 · 17.2° · 0 mm 00:00 · 17° · 0 mm 01:00 · 16.9° · 0 mm 02:00 · 16.8° · 0 mm 03:00 · 16.7° · 0 mm 04:00 · 16.7° · 0 mm 05:00 · 16.7° · 0 mm 06:00 · 17.2° · 0 mm 07:00 · 19.5° · 0 mm 08:00 · 21.8° · 0 mm 09:00 · 24° · 0 mm 10:00 · 24.9° · 0 mm 11:00 · 24.5° · 0.1 mm 12:00 · 23.4° · 0.4 mm 13:00 · 23.2° · 1.9 mm 14:00 · 22.5° · 2.7 mm 15:00 · 21.2° · 2.1 mm 16:00 · 20.7° · 1.1 mm 17:00 · 20.2° · 0.5 mm 18:00 · 19.1° · 0.1 mm

Precipitation

19:00 · 0 mm 19:00 20:00 · 0 mm 21:00 · 0 mm 22:00 · 0 mm 22:00 23:00 · 0 mm 00:00 · 0 mm 01:00 · 0 mm 01:00 02:00 · 0 mm 03:00 · 0 mm 04:00 · 0 mm 04:00 05:00 · 0 mm 06:00 · 0 mm 07:00 · 0 mm 07:00 08:00 · 0 mm 09:00 · 0 mm 10:00 · 0 mm 10:00 11:00 · 0.1 mm 12:00 · 0.4 mm 13:00 · 1.9 mm 13:00 14:00 · 2.7 mm 15:00 · 2.1 mm 16:00 · 1.1 mm 16:00 17:00 · 0.5 mm 18:00 · 0.1 mm

Hour by hour

TIMETEMPFEELSRAINCONDITIONS
19:00 ☁️ 18.4° 20° - Overcast
20:00 ☁️ 18.1° 19.5° - Overcast
21:00 ☁️ 17.9° 19.1° - Overcast
22:00 ☁️ 17.7° 18.9° - Overcast
23:00 ☁️ 17.2° 18.4° - Overcast
00:00 🌤️ 17° 18.1° - Mostly clear
01:00 🌤️ 16.9° 17.8° - Mostly clear
02:00 ☁️ 16.8° 17.5° - Overcast
03:00 🌤️ 16.7° 17.3° - Mostly clear
04:00 🌤️ 16.7° 17.3° - Mostly clear
05:00 ⛅ 16.7° 17.5° - Partly cloudy
06:00 ☁️ 17.2° 18.1° - Overcast

Next 16 days

Today🌦️ 25°17°2mm Fri 4🌧️ 25°17°8.9mm Sat 5🌧️ 25°17°10.8mm Sun 6🌧️ 23°17°15.3mm Mon 7🌧️ 23°17°11.6mm Tue 8🌦️ 26°17°0.6mm Wed 9🌦️ 26°17°0.6mm Thu 10🌦️ 25°17°1.2mm Fri 11🌧️ 25°17°7.5mm Sat 12🌧️ 25°16°7.2mm Sun 13🌧️ 23°17°24.9mm Mon 14🌧️ 23°18°12.9mm Tue 15🌧️ 23°17°6mm Wed 16🌦️ 23°16°5.4mm Thu 17🌧️ 24°17°10.8mm Fri 18🌧️ 24°17°18.3mm
🌦️ TodaySeptember 3rd Avg 20° Low 17° at 03:00 High 25° at 11:00 2 mm rain Feels 27° Wind ~8 km/h
Cloudy Rain Cloudy
00:00 19°
02:00 18°
04:00 17°
06:00 17°
08:00 21°
10:00 25°
12:00 25° 0.1mm
14:00 24° 0.4mm
16:00 23° 0.4mm
18:00 19°
20:00 18°
22:00 18°
🌧️ FridaySeptember 4th Avg 20° Low 17° at 03:00 High 25° at 10:00 8.9 mm rain Wind ~7 km/h
Partly Cloudy Rain Cloudy
00:00 17°
02:00 17°
04:00 17°
06:00 17°
08:00 22°
10:00 25°
12:00 23° 0.4mm
14:00 23° 2.7mm
16:00 21° 1.1mm
18:00 19° 0.1mm
20:00 18°
22:00 18°
🌧️ SaturdaySeptember 5th Avg 20° Low 17° at 04:00 High 25° at 10:00 10.8 mm rain Feels 28° Wind ~7 km/h
Cloudy Rain Cloudy
00:00 17°
02:00 17°
04:00 17°
06:00 17°
08:00 20°
10:00 25°
12:00 22° 1.4mm
14:00 23° 2.3mm
16:00 21° 1.5mm
18:00 19° 0.3mm
20:00 19°
22:00 19°
🌧️ SundaySeptember 6th Avg 19° Low 17° at 02:00 High 23° at 10:00 15.3 mm rain Feels 26° Wind ~6 km/h
Cloudy Cloudy Rain Rain
00:00 18°
02:00 17°
04:00 17°
06:00 18°
08:00 20°
10:00 23° 1.3mm
12:00 23° 2.6mm
14:00 20° 1.8mm
16:00 19° 1.3mm
18:00 19°
20:00 19° 0.1mm
22:00 18° 0.1mm
🌧️ MondaySeptember 7th Avg 19° Low 17° at 05:00 High 23° at 10:00 11.6 mm rain Feels 26° Wind ~7 km/h
Cloudy Rain Cloudy
00:00 17° 0.1mm
02:00 17°
04:00 17°
06:00 17°
08:00 21° 1.6mm
10:00 23° 1.5mm
12:00 22° 1.8mm
14:00 20° 0.3mm
16:00 19° 0.8mm
18:00 18°
20:00 18°
22:00 18°
🌦️ TuesdaySeptember 8th Avg 20° Low 17° at 05:00 High 26° at 12:00 0.6 mm rain Wind ~10 km/h
Cloudy Rain Cloudy
00:00 18°
02:00 18°
04:00 17°
06:00 17°
08:00 20°
10:00 24°
12:00 26°
14:00 25° 0.2mm
16:00 22°
18:00 19°
20:00 19°
22:00 19°
🌦️ WednesdaySeptember 9th Avg 21° Low 17° at 05:00 High 26° at 12:00 0.6 mm rain Wind ~8 km/h
Cloudy Partly Cloudy Rain Cloudy
00:00 18°
02:00 18°
04:00 17°
06:00 18°
08:00 22°
10:00 26°
12:00 26°
14:00 26° 0.2mm
16:00 23°
18:00 19°
20:00 18°
22:00 18°
🌦️ ThursdaySeptember 10th Avg 20° Low 17° at 22:00 High 25° at 14:00 1.2 mm rain Wind ~8 km/h
Cloudy Rain Cloudy
00:00 19°
02:00 18°
04:00 18°
06:00 18°
08:00 22°
10:00 24° 0.1mm
12:00 24° 0.1mm
14:00 25° 0.2mm
16:00 23° 0.1mm
18:00 19° 0.1mm
20:00 17°
22:00 17°
🌧️ FridaySeptember 11th Avg 20° Low 17° at 05:00 High 25° at 11:00 7.5 mm rain Wind ~9 km/h
Partly Cloudy Rain Cloudy
00:00 17°
02:00 17°
04:00 17°
06:00 17°
08:00 22°
10:00 25° 0.1mm
12:00 25° 0.1mm
14:00 24° 1.6mm
16:00 22° 0.8mm
18:00 19° 0.8mm
20:00 19°
22:00 18°
🌧️ SaturdaySeptember 12th Avg 20° Low 16° at 05:00 High 25° at 12:00 7.2 mm rain Wind ~8 km/h
Cloudy Rain
00:00 17°
02:00 17°
04:00 17°
06:00 17°
08:00 21°
10:00 24° 0.1mm
12:00 25° 0.1mm
14:00 24° 1.7mm
16:00 21° 0.6mm
18:00 19° 0.6mm
20:00 18°
22:00 18°
🌧️ SundaySeptember 13th Avg 20° Low 17° at 05:00 High 23° at 10:00 24.9 mm rain Feels 25° Wind ~8 km/h
Partly Cloudy Rain
00:00 18°
02:00 17°
04:00 17°
06:00 17°
08:00 21°
10:00 23° 1mm
12:00 22° 1mm
14:00 23° 3.4mm
16:00 21° 3.3mm
18:00 19° 3.3mm
20:00 18° 0.6mm
22:00 18°
🌧️ MondaySeptember 14th Avg 20° Low 18° at 00:00 High 23° at 10:00 12.9 mm rain Feels 25° Wind ~7 km/h
Cloudy Rain Cloudy
00:00 18°
02:00 18°
04:00 18°
06:00 18°
08:00 21°
10:00 23° 0.6mm
12:00 22° 0.6mm
14:00 22° 2.4mm
16:00 21° 1.3mm
18:00 19° 1.3mm
20:00 18°
22:00 18°
🌧️ TuesdaySeptember 15th Avg 19° Low 17° at 05:00 High 23° at 10:00 6 mm rain Feels 25° Wind ~7 km/h
Cloudy Clear Rain Cloudy
00:00 18°
02:00 18°
04:00 17°
06:00 17°
08:00 21°
10:00 23° 0.3mm
12:00 23° 0.3mm
14:00 22° 1.4mm
16:00 20° 0.3mm
18:00 19° 0.3mm
20:00 18°
22:00 17°
🌦️ WednesdaySeptember 16th Avg 19° Low 16° at 05:00 High 23° at 10:00 5.4 mm rain Feels 25° Wind ~6 km/h
Partly Cloudy Cloudy Rain
00:00 17°
02:00 17°
04:00 16°
06:00 17°
08:00 21°
10:00 23° 0.1mm
12:00 23° 0.1mm
14:00 22° 0.6mm
16:00 21° 0.7mm
18:00 19° 0.7mm
20:00 19° 0.4mm
22:00 19°
🌧️ ThursdaySeptember 17th Avg 20° Low 17° at 05:00 High 24° at 09:00 10.8 mm rain Feels 27° Wind ~5 km/h
Cloudy Clear Rain Cloudy
00:00 19°
02:00 18°
04:00 17°
06:00 18°
08:00 22°
10:00 24° 0.9mm
12:00 22° 0.9mm
14:00 22° 2mm
16:00 21° 0.7mm
18:00 19° 0.7mm
20:00 19°
22:00 18°
🌧️ FridaySeptember 18th Avg 20° Low 17° at 04:00 High 24° at 09:00 18.3 mm rain Feels 27° Wind ~5 km/h
Rain Rain Cloudy
00:00 18°
02:00 17° 1.4mm
04:00 17° 0.3mm
06:00 18° 0.3mm
08:00 22°
10:00 24° 1.1mm
12:00 22° 1.1mm
14:00 23° 1.9mm
16:00 22° 1.4mm
18:00 19° 1.4mm
20:00 19°
22:00 19°

Sun

☀️ Sunrise 05:27 · Sunset 17:45

12h 18m of daylight · America/Costa_Rica

Air quality

PM2.5 14 µg/m³ - Fair

Fine for almost everyone; unusually sensitive people may notice it on a long run.

Source: Copernicus CAMS, updated hourly.

Nearby

Puebla · 1.3 km San Jerónimo · 1.3 km Sarchí · 1.4 km Bambú · 1.7 km Cruce · 1.8 km Tacacal · 2 km

Tools for San Juan

☔ Will it rain today? 🌅 Sunrise & sunset 🫁 Air quality 📼 Weather on this day

Common questions about San Juan weather

Will it rain in San Juan today?

Yes - about 2 mm of rain is expected in San Juan today.

What is the temperature in San Juan right now?

It is 18° in San Juan right now, though it feels closer to 20°. Today runs between a low of 17° and a high of 25°.

What time is sunrise and sunset in San Juan?

The sun rises at 05:27 and sets at 17:45 local time in San Juan today, giving 12h 18m of daylight.

What is the air quality in San Juan?

PM2.5 in San Juan is currently 14 µg/m³, which counts as Fair on the European air-quality index. Fine for almost everyone; unusually sensitive people may notice it on a long run.

How accurate is the San Juan forecast, and how far ahead does it go?

This page shows 16 days ahead, refreshed every hour. It blends ECMWF, NOAA GFS and whichever national high-resolution model covers San Juan best. The first three days are the dependable part - day one is usually within a degree or two - and accuracy falls off steadily after day five, so read the far end as a trend rather than a plan. We publish our measured error against real station observations on the accuracy page.

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