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🇺🇸 Weather in San Francisco in July
This is what the weather in San Francisco (California, USA) was like in July over the years 2017–2026.
Key facts at a glance
Prevailing weather: Partly cloudy
Avg. daytime high
22.7 °C
20.9 °C – 24.3 °C
Avg. night-time low
12.3 °C
11.5 °C – 13.7 °C
Avg. rain days in period
0.0
0 % of days · ≥ 1.0 mm
Avg. precipitation in period
0.7 mm
0.1 mm – 2.1 mm
Avg. cloud cover
53 %
This data source has no sunshine hours – average cloud cover is shown instead.
Avg. sea temperature
14.1 °C
Sea temperature available for 1 of 10 years.
Extremes: Highest temperature 30.0 °C (3 Jul 2024) · Lowest temperature 9.7 °C (4 Jul 2017) · Avg. daily peak wind 19 km/h
Weather mix of all days
- 44Sunny
- 199Partly cloudy
- 66Cloudy
Summary
- On average 22.7 °C during the day and 12.3 °C at night.
- On average 0.0 rain days (Rain day = at least 1.0 mm of precipitation) with 0.7 mm of precipitation in total.
- Not a single year had a rain day.
- The sea averaged 14.1 °C.
- Prevailing weather: Partly cloudy.
- Warmest year: 2024 (avg. 24.3 °C), coolest: 2025 (avg. 20.9 °C).
- Wettest year: 2022 (2.1 mm), driest: 2023 (0.1 mm).
- Extremes: 30.0 °C on 3 Jul 2024 and 9.7 °C on 4 Jul 2017.
Overall values from all 10 years. How is this calculated?
Charts
Temperatures per year
Average over your travel period
Avg. daytime high: 2017 23°, 2018 23°, 2019 23°, 2020 23°, 2021 23°, 2022 22°, 2023 23°, 2024 24°, 2025 21°, 2026 23°. Avg. night-time low: 2017 11°, 2018 13°, 2019 12°, 2020 12°, 2021 12°, 2022 12°, 2023 12°, 2024 14°, 2025 12°, 2026 13°. Sea temperature: 2017 –, 2018 –, 2019 –, 2020 –, 2021 –, 2022 –, 2023 –, 2024 –, 2025 14°, 2026 –.
Precipitation & rain days
Precipitation (mm): 2017 0, 2018 1, 2019 0, 2020 0, 2021 0, 2022 2, 2023 0, 2024 1, 2025 1, 2026 2.
Year by year
2026
Avg. max23.1°Avg. min12.9°- Rain days
- 0 Rain days
- Precipitation
- 1.8 mm
- Avg. cloud cover
- –
- Sea temperature
- –
Max 29.9 °C · Min 10.5 °C
2025
Avg. max20.9°Avg. min11.7°- Rain days
- 0 Rain days
- Precipitation
- 1.0 mm
- Avg. cloud cover
- 60 % cloudy
- Sea temperature
- 14.1 °C
Max 25.4 °C · Min 10.6 °C
2024
Avg. max24.3°Avg. min13.7°- Rain days
- 0 Rain days
- Precipitation
- 0.5 mm
- Avg. cloud cover
- 44 % cloudy
- Sea temperature
- –
Max 30.0 °C · Min 12.0 °C
2023
Avg. max22.7°Avg. min12.2°- Rain days
- 0 Rain days
- Precipitation
- 0.1 mm
- Avg. cloud cover
- 52 % cloudy
- Sea temperature
- –
Max 26.3 °C · Min 10.6 °C
2022
Avg. max21.9°Avg. min12.2°- Rain days
- 0 Rain days
- Precipitation
- 2.1 mm
- Avg. cloud cover
- 55 % cloudy
- Sea temperature
- –
Max 26.2 °C · Min 10.7 °C
2021
Avg. max22.7°Avg. min12.1°- Rain days
- 0 Rain days
- Precipitation
- 0.3 mm
- Avg. cloud cover
- 60 % cloudy
- Sea temperature
- –
Max 28.2 °C · Min 10.6 °C
2020
Avg. max22.7°Avg. min11.8°- Rain days
- 0 Rain days
- Precipitation
- 0.2 mm
- Avg. cloud cover
- 48 % cloudy
- Sea temperature
- –
Max 27.4 °C · Min 10.7 °C
2019
Avg. max22.6°Avg. min12.2°- Rain days
- 0 Rain days
- Precipitation
- 0.2 mm
- Avg. cloud cover
- 51 % cloudy
- Sea temperature
- –
Max 27.7 °C · Min 10.9 °C
2018
Avg. max23.2°Avg. min12.9°- Rain days
- 0 Rain days
- Precipitation
- 0.6 mm
- Avg. cloud cover
- 58 % cloudy
- Sea temperature
- –
Max 26.9 °C · Min 10.3 °C
2017
Avg. max22.6°Avg. min11.5°- Rain days
- 0 Rain days
- Precipitation
- 0.2 mm
- Avg. cloud cover
- 45 % cloudy
- Sea temperature
- –
Max 29.1 °C · Min 9.7 °C
Frequently asked questions
- How warm is it in San Francisco in July?
- Daytime highs averaged 22.7 °C, night-time lows 12.3 °C. The highest value of the past 10 years was 30.0 °C (3 Jul 2024), the lowest 9.7 °C (4 Jul 2017).
- How often does it rain in San Francisco in July?
- On average there were 0.0 rain days (at least 1 mm) with 0.7 mm of precipitation in total. In 10 of 10 years there was no rain day at all.
- How warm is the sea in San Francisco in July?
- The sea temperature averaged 14.1 °C (open-sea point approx. 6 km from the town).
Check your exact travel dates
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Other destinations in July
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) - Sea measuring point approx. 6 km from the location (37.830, -122.450)
- Place search
- Natural Earth (public domain) · GeoNames (CC BY 4.0) / OpenStreetMap (ODbL)