How warm is it in London in April?

Daytime highs averaged 14.3 °C, night-time lows 4.3 °C. The highest value of the past 10 years was 25.2 °C (19 Apr 2018), the lowest -3.3 °C (7 Apr 2021).

How often does it rain in London in April?

On average there were 7.8 rain days (at least 1 mm) with 33.4 mm of precipitation in total.

Photo: Ilya Grigorik · CC BY-SA 3.0

🇬🇧 Weather in London in April

This is what the weather in London (United Kingdom) was like in April in 2017–2026.

Key facts at a glance

Prevailing weather: Partly cloudy

Avg. daytime high

14.3 °C

11.1 °C – 16.4 °C

Avg. night-time low

4.3 °C

0.5 °C – 6.3 °C

Avg. rain days in period

7.8

26 % of days · ≥ 1.0 mm

Avg. precipitation in period

33.4 mm

6.4 mm – 81.3 mm

Avg. cloud cover

64 %

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

Avg. sea temperature

–

No sea nearby – no sea temperature.

Extremes: Highest temperature 25.2 °C (19 Apr 2018) · Lowest temperature -3.3 °C (7 Apr 2021) · Avg. daily peak wind 24 km/h

Weather mix of all days

46Sunny
91Partly cloudy
85Cloudy
58Light rain
20Rain

Summary

On average 14.3 °C during the day and 4.3 °C at night.
On average 7.8 rain days (Rain day = at least 1.0 mm of precipitation) with 33.4 mm of precipitation in total.
Prevailing: Partly cloudy.
Warmest year: 2025 (avg. 16.4 °C), coolest: 2021 (avg. 11.1 °C).
Wettest year: 2018 (81.3 mm), driest: 2026 (6.4 mm).
Extremes: 25.2 °C on 19 Apr 2018 and -3.3 °C on 7 Apr 2021.

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. max15.8°Avg. min5.3°
Rain days
1 Rain days
Precipitation
6.4 mm
Avg. cloud cover
52 % cloudy
Sea temperature
–
Max 22.7 °C · Min 1.7 °C
2025
Avg. max16.4°Avg. min5.2°
Rain days
4 Rain days
Precipitation
23.4 mm
Avg. cloud cover
47 % cloudy
Sea temperature
–
Max 23.1 °C · Min 1.6 °C
2024
Avg. max13.6°Avg. min5.5°
Rain days
15 Rain days
Precipitation
64.7 mm
Avg. cloud cover
80 % cloudy
Sea temperature
–
Max 19.2 °C · Min 0.8 °C
2023
Avg. max13.3°Avg. min3.9°
Rain days
15 Rain days
Precipitation
62.4 mm
Avg. cloud cover
69 % cloudy
Sea temperature
–
Max 17.6 °C · Min -0.5 °C
2022
Avg. max14.4°Avg. min4.2°
Rain days
4 Rain days
Precipitation
18.1 mm
Avg. cloud cover
72 % cloudy
Sea temperature
–
Max 20.2 °C · Min -3.0 °C
2021
Avg. max11.1°Avg. min0.5°
Rain days
2 Rain days
Precipitation
8.7 mm
Avg. cloud cover
56 % cloudy
Sea temperature
–
Max 15.4 °C · Min -3.3 °C
2020
Avg. max15.8°Avg. min4.6°
Rain days
5 Rain days
Precipitation
36.5 mm
Avg. cloud cover
50 % cloudy
Sea temperature
–
Max 22.2 °C · Min -1.5 °C
2019
Avg. max14.2°Avg. min4.0°
Rain days
8 Rain days
Precipitation
17.2 mm
Avg. cloud cover
70 % cloudy
Sea temperature
–
Max 21.8 °C · Min -1.2 °C
2018
Avg. max14.2°Avg. min6.3°
Rain days
18 Rain days
Precipitation
81.3 mm
Avg. cloud cover
77 % cloudy
Sea temperature
–
Max 25.2 °C · Min 1.2 °C
2017
Avg. max14.2°Avg. min4.0°
Rain days
6 Rain days
Precipitation
15.3 mm
Avg. cloud cover
66 % cloudy
Sea temperature
–
Max 21.2 °C · Min -1.4 °C

Frequently asked questions

How warm is it in London in April?: Daytime highs averaged 14.3 °C, night-time lows 4.3 °C. The highest value of the past 10 years was 25.2 °C (19 Apr 2018), the lowest -3.3 °C (7 Apr 2021).
How often does it rain in London in April?: On average there were 7.8 rain days (at least 1 mm) with 33.4 mm of precipitation in total.

Check your exact travel dates

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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. 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)