How warm is it in San Francisco in March?

Daytime highs averaged 15.9 °C, night-time lows 8.0 °C. The highest value of the past 10 years was 27.2 °C (18 Mar 2026), the lowest 2.7 °C (26 Mar 2023).

How often does it rain in San Francisco in March?

On average there were 9.9 rain days (at least 1 mm) with 75.0 mm of precipitation in total.

Holiday Weather Rewind

Destinations Method & data

Loading weather data…

We are fetching the daily values for every year. The first time, this takes a few seconds.

San Francisco weather in March: temperature & rain

Photo: King of Hearts · CC BY-SA 3.0

🇺🇸 Weather in San Francisco in March

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

Key facts at a glance

Prevailing weather: Partly cloudy

Avg. daytime high

15.9 °C

12.7 °C – 21.3 °C

Avg. night-time low

8.0 °C

6.2 °C – 10.7 °C

Avg. rain days in period

9.9

32 % of days · ≥ 1.0 mm

Avg. precipitation in period

75.0 mm

4.2 mm – 195 mm

Avg. cloud cover

53 %

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 27.2 °C (18 Mar 2026) · Lowest temperature 2.7 °C (26 Mar 2023) · Avg. daily peak wind 18 km/h

Weather mix of all days

83Sunny
85Partly cloudy
43Cloudy
48Light rain
51Rain

Summary

On average 15.9 °C during the day and 8.0 °C at night.
On average 9.9 rain days (Rain day = at least 1.0 mm of precipitation) with 75.0 mm of precipitation in total.
Prevailing weather: Partly cloudy.
Warmest year: 2026 (avg. 21.3 °C), coolest: 2023 (avg. 12.7 °C).
Wettest year: 2023 (195 mm), driest: 2026 (4.2 mm).
Extremes: 27.2 °C on 18 Mar 2026 and 2.7 °C on 26 Mar 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. max21.3°Avg. min10.7°
Rain days
1 Rain days
Precipitation
4.2 mm
Avg. cloud cover
34 % cloudy
Sea temperature
–
Max 27.2 °C · Min 7.9 °C
2025
Avg. max15.3°Avg. min8.0°
Rain days
9 Rain days
Precipitation
53.4 mm
Avg. cloud cover
61 % cloudy
Sea temperature
–
Max 25.1 °C · Min 4.7 °C
2024
Avg. max15.2°Avg. min8.5°
Rain days
14 Rain days
Precipitation
82.6 mm
Avg. cloud cover
58 % cloudy
Sea temperature
–
Max 19.0 °C · Min 6.5 °C
2023
Avg. max12.7°Avg. min6.2°
Rain days
15 Rain days
Precipitation
195 mm
Avg. cloud cover
56 % cloudy
Sea temperature
–
Max 17.0 °C · Min 2.7 °C
2022
Avg. max16.9°Avg. min7.9°
Rain days
4 Rain days
Precipitation
20.0 mm
Avg. cloud cover
48 % cloudy
Sea temperature
–
Max 24.2 °C · Min 5.1 °C
2021
Avg. max15.9°Avg. min6.6°
Rain days
7 Rain days
Precipitation
38.3 mm
Avg. cloud cover
41 % cloudy
Sea temperature
–
Max 25.6 °C · Min 4.6 °C
2020
Avg. max15.4°Avg. min7.7°
Rain days
11 Rain days
Precipitation
41.6 mm
Avg. cloud cover
62 % cloudy
Sea temperature
–
Max 23.5 °C · Min 4.8 °C
2019
Avg. max15.0°Avg. min8.1°
Rain days
16 Rain days
Precipitation
113 mm
Avg. cloud cover
61 % cloudy
Sea temperature
–
Max 21.2 °C · Min 5.3 °C
2018
Avg. max15.3°Avg. min7.5°
Rain days
14 Rain days
Precipitation
127 mm
Avg. cloud cover
62 % cloudy
Sea temperature
–
Max 24.7 °C · Min 3.0 °C
2017
Avg. max16.5°Avg. min8.9°
Rain days
8 Rain days
Precipitation
75.0 mm
Avg. cloud cover
50 % cloudy
Sea temperature
–
Max 23.3 °C · Min 4.4 °C

Frequently asked questions

How warm is it in San Francisco in March?: Daytime highs averaged 15.9 °C, night-time lows 8.0 °C. The highest value of the past 10 years was 27.2 °C (18 Mar 2026), the lowest 2.7 °C (26 Mar 2023).
How often does it rain in San Francisco in March?: On average there were 9.9 rain days (at least 1 mm) with 75.0 mm of precipitation in total.

Check your exact travel dates

Choose your travel period – we show the weather for exactly those days.

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)