How warm is it in San Diego in April?

Daytime highs averaged 21.2 °C, night-time lows 10.9 °C. The highest value of the past 10 years was 32.6 °C (8 Apr 2022), the lowest 4.4 °C (4 Apr 2023).

How often does it rain in San Diego in April?

On average there were 2.3 rain days (at least 1 mm) with 12.2 mm of precipitation in total. In 3 of 10 years there was no rain day at all.

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San Diego weather in April: temperature & rain

Photo: Adbar · CC BY-SA 3.0

🇺🇸 Weather in San Diego in April

This is what the weather in San Diego (California, USA) was like in April over the years 2017–2026.

Key facts at a glance

Prevailing weather: Cloudy

Avg. daytime high

21.2 °C

20.0 °C – 22.4 °C

Avg. night-time low

10.9 °C

9.5 °C – 12.1 °C

Avg. rain days in period

2.3

8 % of days · ≥ 1.0 mm

Avg. precipitation in period

12.2 mm

1.0 mm – 70.8 mm

Avg. cloud cover

59 %

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 32.6 °C (8 Apr 2022) · Lowest temperature 4.4 °C (4 Apr 2023) · Avg. daily peak wind 19 km/h

Weather mix of all days

65Sunny
94Partly cloudy
118Cloudy
17Light rain
6Rain

Summary

On average 21.2 °C during the day and 10.9 °C at night.
On average 2.3 rain days (Rain day = at least 1.0 mm of precipitation) with 12.2 mm of precipitation in total.
In 3 of 10 years there was not a single rain day.
Prevailing weather: Cloudy.
Warmest year: 2017 (avg. 22.4 °C), coolest: 2024 (avg. 20.0 °C).
Wettest year: 2020 (70.8 mm), driest: 2017 (1.0 mm).
Extremes: 32.6 °C on 8 Apr 2022 and 4.4 °C on 4 Apr 2023.

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. max21.9°Avg. min12.1°
Rain days
3 Rain days
Precipitation
7.6 mm
Avg. cloud cover
53 % cloudy
Sea temperature
–
Max 28.3 °C · Min 9.4 °C
2025
Avg. max20.3°Avg. min10.4°
Rain days
3 Rain days
Precipitation
9.3 mm
Avg. cloud cover
62 % cloudy
Sea temperature
–
Max 27.0 °C · Min 7.8 °C
2024
Avg. max20.0°Avg. min10.1°
Rain days
4 Rain days
Precipitation
12.5 mm
Avg. cloud cover
56 % cloudy
Sea temperature
–
Max 26.2 °C · Min 7.2 °C
2023
Avg. max20.3°Avg. min9.5°
Rain days
0 Rain days
Precipitation
3.0 mm
Avg. cloud cover
66 % cloudy
Sea temperature
–
Max 27.8 °C · Min 4.4 °C
2022
Avg. max22.4°Avg. min11.3°
Rain days
2 Rain days
Precipitation
5.5 mm
Avg. cloud cover
43 % cloudy
Sea temperature
–
Max 32.6 °C · Min 8.4 °C
2021
Avg. max21.3°Avg. min10.5°
Rain days
1 Rain days
Precipitation
4.3 mm
Avg. cloud cover
63 % cloudy
Sea temperature
–
Max 30.7 °C · Min 7.1 °C
2020
Avg. max20.1°Avg. min11.6°
Rain days
9 Rain days
Precipitation
70.8 mm
Avg. cloud cover
66 % cloudy
Sea temperature
–
Max 31.9 °C · Min 7.7 °C
2019
Avg. max21.4°Avg. min11.6°
Rain days
1 Rain days
Precipitation
6.2 mm
Avg. cloud cover
69 % cloudy
Sea temperature
–
Max 28.1 °C · Min 9.6 °C
2018
Avg. max22.0°Avg. min10.8°
Rain days
0 Rain days
Precipitation
1.8 mm
Avg. cloud cover
63 % cloudy
Sea temperature
–
Max 31.2 °C · Min 6.9 °C
2017
Avg. max22.4°Avg. min11.2°
Rain days
0 Rain days
Precipitation
1.0 mm
Avg. cloud cover
50 % cloudy
Sea temperature
–
Max 29.3 °C · Min 8.6 °C

Frequently asked questions

How warm is it in San Diego in April?: Daytime highs averaged 21.2 °C, night-time lows 10.9 °C. The highest value of the past 10 years was 32.6 °C (8 Apr 2022), the lowest 4.4 °C (4 Apr 2023).
How often does it rain in San Diego in April?: On average there were 2.3 rain days (at least 1 mm) with 12.2 mm of precipitation in total. In 3 of 10 years there was no rain day at all.

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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)