How warm is it in London in March?

Daytime highs averaged 11.4 °C, night-time lows 3.4 °C. The highest value of the past 10 years was 20.4 °C (31 Mar 2021), the lowest -4.4 °C (1 Mar 2018).

How often does it rain in London in March?

On average there were 12.8 rain days (at least 1 mm) with 53.6 mm of precipitation in total.

🇬🇧 Weather in London in March

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

Key facts at a glance

Prevailing weather: Light rain

Avg. daytime high

11.4 °C

8.6 °C – 12.8 °C

Avg. night-time low

3.4 °C

1.8 °C – 5.1 °C

Avg. rain days in period

12.8

41 % of days · ≥ 1.0 mm

Avg. precipitation in period

53.6 mm

9.6 mm – 97.5 mm

Avg. cloud cover

70 %

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

Avg. sea temperature

–

No sea nearby – no sea temperature.

Extremes: Highest temperature 20.4 °C (31 Mar 2021) · Lowest temperature -4.4 °C (1 Mar 2018) · Avg. daily peak wind 28 km/h

Weather mix of all days

28Sunny
74Partly cloudy
80Cloudy
94Light rain
34Rain

Summary

On average 11.4 °C during the day and 3.4 °C at night.
On average 12.8 rain days (Rain day = at least 1.0 mm of precipitation) with 53.6 mm of precipitation in total.
Prevailing: Light rain.
Warmest year: 2017 (avg. 12.8 °C), coolest: 2018 (avg. 8.6 °C).
Wettest year: 2023 (97.5 mm), driest: 2025 (9.6 mm).
Extremes: 20.4 °C on 31 Mar 2021 and -4.4 °C on 1 Mar 2018.

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. max12.6°Avg. min4.0°
Rain days
10 Rain days
Precipitation
30.3 mm
Avg. cloud cover
64 % cloudy
Sea temperature
–
Max 16.9 °C · Min 0.8 °C
2025
Avg. max12.6°Avg. min2.5°
Rain days
4 Rain days
Precipitation
9.6 mm
Avg. cloud cover
57 % cloudy
Sea temperature
–
Max 18.3 °C · Min -2.1 °C
2024
Avg. max11.6°Avg. min4.9°
Rain days
19 Rain days
Precipitation
79.0 mm
Avg. cloud cover
78 % cloudy
Sea temperature
–
Max 15.6 °C · Min -0.4 °C
2023
Avg. max10.5°Avg. min3.8°
Rain days
24 Rain days
Precipitation
97.5 mm
Avg. cloud cover
84 % cloudy
Sea temperature
–
Max 15.0 °C · Min -2.4 °C
2022
Avg. max12.3°Avg. min3.6°
Rain days
9 Rain days
Precipitation
40.8 mm
Avg. cloud cover
57 % cloudy
Sea temperature
–
Max 17.9 °C · Min -1.2 °C
2021
Avg. max10.8°Avg. min2.3°
Rain days
10 Rain days
Precipitation
40.8 mm
Avg. cloud cover
73 % cloudy
Sea temperature
–
Max 20.4 °C · Min -2.0 °C
2020
Avg. max10.2°Avg. min2.4°
Rain days
11 Rain days
Precipitation
46.1 mm
Avg. cloud cover
58 % cloudy
Sea temperature
–
Max 14.4 °C · Min -1.7 °C
2019
Avg. max12.0°Avg. min4.1°
Rain days
12 Rain days
Precipitation
59.8 mm
Avg. cloud cover
70 % cloudy
Sea temperature
–
Max 17.7 °C · Min -0.5 °C
2018
Avg. max8.6°Avg. min1.8°
Rain days
19 Rain days
Precipitation
93.4 mm
Avg. cloud cover
87 % cloudy
Sea temperature
–
Max 13.1 °C · Min -4.4 °C
2017
Avg. max12.8°Avg. min5.1°
Rain days
10 Rain days
Precipitation
38.6 mm
Avg. cloud cover
78 % cloudy
Sea temperature
–
Max 19.4 °C · Min 2.5 °C

Frequently asked questions

How warm is it in London in March?: Daytime highs averaged 11.4 °C, night-time lows 3.4 °C. The highest value of the past 10 years was 20.4 °C (31 Mar 2021), the lowest -4.4 °C (1 Mar 2018).
How often does it rain in London in March?: On average there were 12.8 rain days (at least 1 mm) with 53.6 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)