How warm is it in San Juan in April?

Daytime highs averaged 29.4 °C, night-time lows 24.4 °C. The highest value of the past 10 years was 33.4 °C (6 Apr 2024), the lowest 22.3 °C (28 Apr 2022).

How often does it rain in San Juan in April?

On average there were 15.8 rain days (at least 1 mm) with 95.7 mm of precipitation in total.

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San Juan weather in April: temperature & rain

Photo: P. Hughes · CC BY-SA 4.0

🇵🇷 Weather in San Juan in April

This is what the weather in San Juan (Puerto Rico) was like in April over the years 2017–2026.

Key facts at a glance

Prevailing weather: Partly cloudy

Avg. daytime high

29.4 °C

28.5 °C – 30.4 °C

Avg. night-time low

24.4 °C

23.9 °C – 25.1 °C

Avg. rain days in period

15.8

53 % of days · ≥ 1.0 mm

Avg. precipitation in period

95.7 mm

23.5 mm – 177 mm

Avg. cloud cover

62 %

This data source has no sunshine hours – average cloud cover is shown instead.

Avg. sea temperature

–

Sea temperature unavailable for today (daily limit).

Extremes: Highest temperature 33.4 °C (6 Apr 2024) · Lowest temperature 22.3 °C (28 Apr 2022) · Avg. daily peak wind 21 km/h

Weather mix of all days

129Partly cloudy
13Cloudy
101Light rain
57Rain

Summary

On average 29.4 °C during the day and 24.4 °C at night.
On average 15.8 rain days (Rain day = at least 1.0 mm of precipitation) with 95.7 mm of precipitation in total.
Prevailing weather: Partly cloudy.
Warmest year: 2020 (avg. 30.4 °C), coolest: 2017 (avg. 28.5 °C).
Wettest year: 2025 (177 mm), driest: 2019 (23.5 mm).
Extremes: 33.4 °C on 6 Apr 2024 and 22.3 °C on 28 Apr 2022.

Overall values from all 10 years. How is this calculated?

Temperatures per year

Average over your travel period

Precipitation & rain days

Year by year

2026
Avg. max29.2°Avg. min24.7°
Rain days
26 Rain days
Precipitation
145 mm
Avg. cloud cover
68 % cloudy
Sea temperature
–
Max 31.2 °C · Min 23.8 °C
2025
Avg. max29.3°Avg. min24.7°
Rain days
21 Rain days
Precipitation
177 mm
Avg. cloud cover
64 % cloudy
Sea temperature
–
Max 30.7 °C · Min 23.4 °C
2024
Avg. max30.0°Avg. min25.1°
Rain days
20 Rain days
Precipitation
137 mm
Avg. cloud cover
67 % cloudy
Sea temperature
–
Max 33.4 °C · Min 24.2 °C
2023
Avg. max29.2°Avg. min24.3°
Rain days
16 Rain days
Precipitation
74.9 mm
Avg. cloud cover
54 % cloudy
Sea temperature
–
Max 31.8 °C · Min 23.7 °C
2022
Avg. max28.9°Avg. min24.0°
Rain days
12 Rain days
Precipitation
73.3 mm
Avg. cloud cover
64 % cloudy
Sea temperature
–
Max 30.3 °C · Min 22.3 °C
2021
Avg. max29.1°Avg. min23.9°
Rain days
16 Rain days
Precipitation
121 mm
Avg. cloud cover
64 % cloudy
Sea temperature
–
Max 31.2 °C · Min 22.3 °C
2020
Avg. max30.4°Avg. min24.9°
Rain days
10 Rain days
Precipitation
34.0 mm
Avg. cloud cover
53 % cloudy
Sea temperature
–
Max 31.7 °C · Min 23.1 °C
2019
Avg. max29.6°Avg. min24.3°
Rain days
6 Rain days
Precipitation
23.5 mm
Avg. cloud cover
55 % cloudy
Sea temperature
–
Max 30.7 °C · Min 23.1 °C
2018
Avg. max29.4°Avg. min24.3°
Rain days
13 Rain days
Precipitation
42.9 mm
Avg. cloud cover
60 % cloudy
Sea temperature
–
Max 30.4 °C · Min 22.8 °C
2017
Avg. max28.5°Avg. min24.0°
Rain days
18 Rain days
Precipitation
128 mm
Avg. cloud cover
68 % cloudy
Sea temperature
–
Max 29.9 °C · Min 23.0 °C

Frequently asked questions

How warm is it in San Juan in April?: Daytime highs averaged 29.4 °C, night-time lows 24.4 °C. The highest value of the past 10 years was 33.4 °C (6 Apr 2024), the lowest 22.3 °C (28 Apr 2022).
How often does it rain in San Juan in April?: On average there were 15.8 rain days (at least 1 mm) with 95.7 mm of precipitation in total.

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Data sources

Weather data: Data obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program
Reanalysis (weather model constrained by observations) on a coarse grid of about 50 km. Values represent a large area and can differ from local conditions, especially on islands, coasts and in mountains. Snow depth is the model value for the grid cell, not the depth on the slopes. No sunshine duration.
Reanalysis (weather model constrained by observations)
Reanalysis values represent a grid cell (approx. 25–50 km) and may differ from local measurements on coasts, islands and in mountains.
Sea temperature: MUR SST data were provided by JPL under support by NASA MEaSUREs program; accessed via NOAA CoastWatch ERDDAP
Daily multi-scale ultra-high resolution (≈ 1 km) analysis of satellite measurements (infrared, microwave) and in-situ data. Represents the foundation temperature below the daily warm surface layer. (Satellite and in-situ analysis)
Place search: Natural Earth (public domain) · GeoNames (CC BY 4.0) / OpenStreetMap (ODbL)