San Juan

Current Weather

21°69°

Humid and Overcast

Feels Like: 20°68°

Min: 19°67°

Max: 24°75°

The next few hours will be mostly cloudy, with tomorrow reaching 22°C and dropping to 18°C. The coming days will be light rain

Hourly Forecast
21°69°20°69°20°69°20°68°20°68°20°68°20°67°19°67°19°66°19°66°19°66°19°65°20°68°21°70°22°72°22°72°22°72°22°71°22°71°21°70°21°70°21°69°20°68°20°68°
46%
46%
46%
18%
18%
18%
12%
36%
36%
36%
100%
100%
100%
100%
100%
100%
100%
100%
100%
7pm
8pm
9pm
10pm
11pm
12am
1am
2am
3am
4am
5am
6am
7am
8am
9am
10am
11am
12pm
1pm
2pm
3pm
4pm
5pm
6pm
Today
Tomorrow

Want a closer look at the weather?

Premium adds minute-by-minute rain timing, yesterday comparisons, and more detail across Airpult.

Get Premium
Air Quality
19
Good

Air quality is satisfactory, and air pollution poses little or no risk.

GoodHazardous
Daylight Hours

05:29

Sunrise

17:17

Sunset

11 hours 48 minutes of sunlight today
Moon

06:06

Moonrise

Daily Forecast

Sunday

19°67°
24°75°

Today

19°65°
22°72°

Tuesday

18°65°
24°75°

Wednesday

18°65°
24°76°

Thursday

19°67°
24°76°

Friday

19°66°
25°76°

Saturday

19°66°
22°72°

Sunday

20°67°
23°73°

Monday

19°67°
23°73°

Tuesday

19°66°
23°74°
UV Index
No protection needed
0Low
LowExtreme
Humidity
99%Very Humid
LowHigh
Looking at the night sky?

See moon phases, eclipses, and seasons for this year.

View astronomy
Current stargazing conditions?

See sky darkness, moon phase, and the best viewing window for San Juan.

View stargazing score

Weather in San Juan tomorrow, October 12, 2026

San Juan starts October 12, 2026 looking damp, with rain in the forecast and wetter spells likely at times. Waterproof kit is the safer call for early plans. The morning carries the wetter risk, with rain chances near 100% and the highest odds around 10:00. Cloud is also thick early on, peaking near 95% around 00:00.San Juan starts October 12, 2026 looking damp, with rain in the forecast and wetter spells likely at times. Waterproof kit is the safer call for early plans. The morning carries the wetter risk, with rain chances near 100% and the highest odds around 10:00. Cloud is also thick early on, peaking near 95% around 00:00.

Expect highs of 22°C and cooler readings close to 19°C. The air stays humid, with relative humidity between 88% and 98% and the peak around 15:00. A lighter breeze peaks around 12:00 near 6 km/h.Expect highs of 72°F and cooler readings close to 65°F. The air stays humid, with relative humidity between 88% and 98% and the peak around 15:00. A lighter breeze peaks around 12:00 near 4 mph.

Expect the wet theme to continue later, as rain odds reach 100% near 12:00. Cloud amounts hold near 99% around 18:00. Visibility holds near 12.6 km, though it can fall to 4 km. Sunrise is at 05:29 and sunset at 17:17, giving 11 hours 48 minutes of sunlight today.Expect the wet theme to continue later, as rain odds reach 100% near 12:00. Cloud amounts hold near 99% around 18:00. Visibility holds near 7.8 mi, though it can fall to 2.5 mi. Sunrise is at 05:29 and sunset at 17:17, giving 11 hours 48 minutes of sunlight today.

In short, treat October 12, 2026 in San Juan as a damp day: pack covers, watch the wetter hours, and expect a high near 22°C.In short, treat October 12, 2026 in San Juan as a damp day: pack covers, watch the wetter hours, and expect a high near 72°F.

Frequently asked questions about weather in San Juan

How warm does it get in San Juan?

The warmest month in San Juan is March, with average high temperatures of 26°C. The average temperature during this period is around 22°C.The warmest month in San Juan is March, with average high temperatures of 79°F. The average temperature during this period is around 72°F.

How cold does it get in San Juan?

The coldest month in San Juan is January, with average low temperatures of 18°C. The average temperature during this period is around 22°C.The coldest month in San Juan is January, with average low temperatures of 65°F. The average temperature during this period is around 71°F.

What is the wettest time of year in San Juan?

The wettest month in San Juan is October, with an average of 849 mm of precipitation.The wettest month in San Juan is October, with an average of 33.4 in of precipitation.

What is the driest time of year in San Juan?

The driest month in San Juan is February, with an average of 69 mm of precipitation.The driest month in San Juan is February, with an average of 2.7 in of precipitation.

View full climate insights for San Juan →