July is one of the warmer months of the year in San Francisco, with average highs near 22.8°C and lows around 12°C (mean 17.4°C). It is one of the drier months, averaging 1 mm of rainfall and 72% relative humidity across the period.
July is one of the warmer months of the year in San Francisco. Across 45 years of records, the warmest July in San Francisco was 1988 — when the month averaged 19.2°C — while the coldest was 2010 at 15.8°C. Typical July days reach 22.8°C with nights near 12°C. The long-term July temperature trend is broadly flat.
July is one of the drier months in San Francisco, averaging 1 mm of rainfall. The wettest July on record was 2005 with 8 mm, while the driest were 2002 and 2023 at 0 mm.
Relative humidity in San Francisco during July averages 72%. The most humid July was 1998 at 79%, and the least humid was 1984 at 64%.
July receives about 6.5 kWh/m²/day of solar energy in San Francisco. The sunniest July was 1989 at 7.3 kWh/m²/day, and the cloudiest was 1994 at 5.6.
Average wind speed in San Francisco during July is 2.4 m/s. The windiest July was 2022 at 2.8 m/s, while the calmest was 1994 at 1.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 17.9°C | 17.5°C | 17.2°C | 17.1°C | 17.4°C | -0.5°C |
| Avg High | 23.9°C | 23.1°C | 22.5°C | 22.2°C | 22.5°C | -1.4°C |
| Avg Low | 11.9°C | 11.9°C | 11.9°C | 12.1°C | 12.3°C | +0.4°C |
| Avg Rain | 1 mm | 1 mm | 2 mm | 1 mm | 1 mm | +0 mm |
July temperatures in San Francisco have fallen by about 0.5°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 9.1°C (1987) to a record high of 36°C (1988).
Rainfall in July is one of the drier months, averaging 1 mm, with a wettest year of 8 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.4°C per decade while lows rose 0.1°C per decade, narrowing the gap between day and night.
One of the best times to visit San Francisco
July is one of the best times to visit San Francisco. Expect days averaging 22.8°C and nights around 12°C (mean 17.4°C) — warmer than San Francisco's yearly average — with low rainfall (1 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 20.9°C | 16.3°C | 11.7°C | 25.4°C | 10.6°C | 1 mm | 76% | 2.7 m/s | 6.6 |
| 2024 | 24.3°C | 19.0°C | 13.7°C | 30.0°C | 12.0°C | 1 mm | 67% | 2.5 m/s | 6.9 |
| 2023 | 22.7°C | 17.5°C | 12.2°C | 26.3°C | 10.6°C | 0 mm | 74% | 2.6 m/s | 6.9 |
| 2022 | 21.9°C | 17.0°C | 12.2°C | 26.2°C | 10.7°C | 2 mm | 74% | 2.8 m/s | 6.6 |
| 2021 | 22.7°C | 17.4°C | 12.1°C | 28.2°C | 10.6°C | 0 mm | 70% | 2.6 m/s | 6.3 |
| 2020 | 22.7°C | 17.3°C | 11.8°C | 27.4°C | 10.7°C | 0 mm | 71% | 2.7 m/s | 6.8 |
| 2019 | 22.6°C | 17.4°C | 12.2°C | 27.7°C | 10.9°C | 0 mm | 76% | 2.7 m/s | 6.9 |
| 2018 | 23.2°C | 18.0°C | 12.9°C | 26.9°C | 10.3°C | 1 mm | 72% | 2.7 m/s | 6.5 |
| 2017 | 22.6°C | 17.1°C | 11.5°C | 29.1°C | 9.7°C | 0 mm | 73% | 2.5 m/s | 7 |
| 2016 | 21.9°C | 16.8°C | 11.8°C | 27.7°C | 10.6°C | 0 mm | 72% | 2.5 m/s | 6.9 |
| 2015 | 23.2°C | 18.6°C | 14.1°C | 30.9°C | 12.3°C | 3 mm | 75% | 2.5 m/s | 6.3 |
| 2014 | 23.5°C | 18.4°C | 13.3°C | 32.3°C | 10.2°C | 1 mm | 72% | 2.2 m/s | 6.2 |
| 2013 | 21.5°C | 16.7°C | 11.9°C | 26.7°C | 10.6°C | 1 mm | 75% | 2.3 m/s | 6 |
| 2012 | 21.3°C | 16.3°C | 11.2°C | 27.1°C | 10.0°C | 3 mm | 74% | 2.4 m/s | 6.5 |
| 2011 | 21.3°C | 16.3°C | 11.4°C | 28.8°C | 10.2°C | 0 mm | 78% | 2.3 m/s | 6.4 |
| 2010 ❄️ | 20.7°C | 15.8°C | 10.9°C | 28.1°C | 9.5°C | 1 mm | 77% | 2.3 m/s | 6.3 |
| 2009 | 22.3°C | 16.8°C | 11.4°C | 32.2°C | 10.4°C | 2 mm | 73% | 2.4 m/s | 6.5 |
| 2008 | 23.1°C | 17.5°C | 11.9°C | 33.4°C | 9.7°C | 1 mm | 72% | 2.4 m/s | 6.5 |
| 2007 | 22.6°C | 17.5°C | 12.4°C | 27.7°C | 10.3°C | 2 mm | 76% | 2.3 m/s | 6.7 |
| 2006 | 23.2°C | 17.9°C | 12.6°C | 30.3°C | 9.7°C | 0 mm | 76% | 2.1 m/s | 7.1 |
| 2005 🌧️ | 22.9°C | 17.5°C | 12.2°C | 30.4°C | 10.6°C | 8 mm | 77% | 2 m/s | 6.7 |
| 2004 | 22.3°C | 17.3°C | 12.2°C | 25.4°C | 10.6°C | 0 mm | 77% | 2.2 m/s | 6.1 |
| 2003 | 22.7°C | 17.3°C | 11.8°C | 26.5°C | 9.7°C | 1 mm | 73% | 2.3 m/s | 6.7 |
| 2002 | 22.2°C | 16.9°C | 11.6°C | 30.3°C | 9.8°C | 0 mm | 74% | 2.2 m/s | 6.6 |
| 2001 | 21.8°C | 16.7°C | 11.6°C | 28.5°C | 10.2°C | 1 mm | 73% | 2.3 m/s | 6.2 |
| 2000 | 21.7°C | 16.6°C | 11.4°C | 28.0°C | 9.9°C | 6 mm | 74% | 2.5 m/s | 6.4 |
| 1999 | 21.6°C | 16.3°C | 11.0°C | 28.4°C | 9.3°C | 2 mm | 71% | 2.5 m/s | 6.6 |
| 1998 | 22.3°C | 17.0°C | 11.7°C | 31.8°C | 9.8°C | 0 mm | 79% | 2.1 m/s | 6.4 |
| 1997 | 23.7°C | 18.0°C | 12.4°C | 28.4°C | 10.9°C | 1 mm | 71% | 2.3 m/s | 6.5 |
| 1996 | 23.2°C | 17.6°C | 12.0°C | 29.2°C | 10.2°C | 1 mm | 71% | 2.1 m/s | 6.4 |
| 1995 | 23.3°C | 18.0°C | 12.7°C | 32.2°C | 11.1°C | 0 mm | 76% | 2.1 m/s | 7 |
| 1994 | 22.6°C | 16.7°C | 10.9°C | 26.5°C | 9.6°C | 1 mm | 70% | 1.9 m/s | 5.6 |
| 1993 | 24.1°C | 17.9°C | 11.7°C | 32.8°C | 9.9°C | 1 mm | 69% | 2.2 m/s | 6.7 |
| 1992 | 23.7°C | 18.3°C | 12.9°C | 27.4°C | 10.2°C | 0 mm | 72% | 2.3 m/s | 6.3 |
| 1991 | 23.2°C | 17.4°C | 11.7°C | 31.9°C | 9.7°C | 1 mm | 73% | 2 m/s | 6.2 |
| 1990 | 23.6°C | 17.9°C | 12.3°C | 28.9°C | 10.6°C | 1 mm | 71% | 2 m/s | 6.3 |
| 1989 | 23.8°C | 17.6°C | 11.3°C | 27.5°C | 10.0°C | 0 mm | 67% | 2.7 m/s | 7.3 |
| 1988 🔥 | 25.7°C | 19.2°C | 12.7°C | 36.0°C | 10.3°C | 0 mm | 64% | 2.3 m/s | 6.5 |
| 1987 | 22.9°C | 17.1°C | 11.4°C | 30.8°C | 9.1°C | 0 mm | 69% | 2.7 m/s | 7.1 |
| 1986 | 23.2°C | 17.4°C | 11.6°C | 28.0°C | 9.6°C | 1 mm | 70% | 2.2 m/s | 6.4 |
| 1985 | 24.0°C | 18.2°C | 12.5°C | 29.7°C | 9.9°C | 1 mm | 65% | 2.3 m/s | 6.2 |
| 1984 | 24.9°C | 18.8°C | 12.7°C | 29.3°C | 10.5°C | 1 mm | 64% | 2.1 m/s | 6.4 |
| 1983 | 23.2°C | 17.6°C | 12.1°C | 31.0°C | 10.2°C | 1 mm | 73% | 2.5 m/s | — |
| 1982 | 22.7°C | 17.1°C | 11.4°C | 27.7°C | 9.8°C | 1 mm | 72% | 2.4 m/s | — |
| 1981 | 24.3°C | 17.8°C | 11.4°C | 29.5°C | 10.1°C | 1 mm | 64% | 2.2 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 22.8°C with lows near 12°C (mean 17.4°C), based on 45 years of NASA POWER data.
July averages 1 mm of rainfall in San Francisco, one of the drier months. The wettest on record was 8 mm in 2005.
The hottest July reached 36°C in 1988. The coldest dipped to 9.1°C in 1987.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have fallen by about 0.5°C — but days and nights have moved in opposite directions. Overnight lows rose from 12°C to 12.4°C while daytime highs eased from 23.8°C to 22.5°C, narrowing the gap between day and night.
July is one of the warmer months of the year in San Francisco and one of the drier months, so plan for around 22.8°C daytime highs and 12°C at night.
Not quite — July is the 10th coolest month in San Francisco, averaging 17.4°C.
For July in San Francisco, pack light layers you can adjust through the day, with typical highs of 22.8°C and lows of 12°C.
Relative humidity in July averages 72% — moderately humid.
Average wind speed in July is 2.4 m/s. The windiest July on record averaged 2.8 m/s (2022).
The wettest July on record was 2005 with 8 mm. On average, July sees 1 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in San Francisco behaves each July, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for July specifically, along with year-by-year records and how the month has changed over the decades.
