July is one of the warmer months of the year in Chula Vista, with average highs near 29.4°C and lows around 16.7°C (mean 23°C). It is one of the drier months, averaging 4 mm of rainfall and 57% relative humidity across the period.
July is one of the warmer months of the year in Chula Vista. Across 45 years of records, the warmest July in Chula Vista was 2006 — when the month averaged 26.4°C — while the coldest was 1993 at 20.2°C. Typical July days reach 29.4°C with nights near 16.7°C. The long-term July temperature trend is broadly flat.
July is one of the drier months in Chula Vista, averaging 4 mm of rainfall. The wettest July on record was 1984 with 29 mm, while the driest was 2020 at 0 mm.
Relative humidity in Chula Vista during July averages 57%. The most humid July was 1993 at 70%, and the least humid was 1981 at 44%.
July receives about 6.1 kWh/m²/day of solar energy in Chula Vista. The sunniest July was 2020 at 7 kWh/m²/day, and the cloudiest was 2010 at 5.1.
Average wind speed in Chula Vista during July is 2.1 m/s. The windiest July was 2014 at 2.3 m/s, while the calmest were 1984, 1988 and 2023 at 1.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.4°C | 22.5°C | 23.4°C | 23.0°C | 23.3°C | -0.1°C |
| Avg High | 29.9°C | 28.7°C | 29.8°C | 29.2°C | 29.9°C | 0°C |
| Avg Low | 16.9°C | 16.3°C | 17.1°C | 16.7°C | 16.8°C | -0.1°C |
| Avg Rain | 6 mm | 4 mm | 3 mm | 6 mm | 3 mm | -4 mm |
July temperatures in Chula Vista have fallen by about 0.4°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 11.1°C (2010) to a record high of 40.9°C (2018).
Rainfall in July is one of the drier months, averaging 4 mm, with a wettest year of 29 mm.
One of the best times to visit Chula Vista
July is one of the best times to visit Chula Vista. Expect days averaging 29.4°C and nights around 16.7°C (mean 23°C) — warmer than Chula Vista's yearly average — with low rainfall (4 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 | 27.6°C | 21.2°C | 14.8°C | 32.3°C | 12.8°C | 2 mm | 63% | 2.2 m/s | 6.3 |
| 2024 | 31.8°C | 25.0°C | 18.1°C | 35.6°C | 14.6°C | 3 mm | 51% | 2 m/s | 6.1 |
| 2023 | 31.1°C | 24.4°C | 17.8°C | 34.5°C | 11.9°C | 2 mm | 50% | 1.9 m/s | 6.1 |
| 2022 | 29.7°C | 23.1°C | 16.5°C | 32.2°C | 13.8°C | 3 mm | 57% | 2.1 m/s | 6.2 |
| 2021 | 30.8°C | 24.4°C | 17.9°C | 33.0°C | 15.4°C | 7 mm | 52% | 2.1 m/s | 6.4 |
| 2020 | 28.3°C | 22.0°C | 15.7°C | 34.5°C | 13.0°C | 0 mm | 59% | 2 m/s | 7 |
| 2019 | 29.1°C | 22.6°C | 16.0°C | 33.7°C | 12.3°C | 6 mm | 54% | 2 m/s | 5.9 |
| 2018 | 31.9°C | 25.5°C | 19.0°C | 40.9°C | 12.8°C | 4 mm | 55% | 2 m/s | 6.4 |
| 2017 | 31.4°C | 24.7°C | 17.9°C | 35.5°C | 13.3°C | 2 mm | 55% | 2 m/s | 6.1 |
| 2016 | 30.1°C | 23.5°C | 16.9°C | 36.6°C | 12.8°C | 4 mm | 54% | 2.2 m/s | 6.8 |
| 2015 | 27.8°C | 22.2°C | 16.7°C | 31.7°C | 13.3°C | 16 mm | 67% | 2.1 m/s | 6.1 |
| 2014 | 30.3°C | 23.9°C | 17.6°C | 34.9°C | 14.9°C | 2 mm | 59% | 2.3 m/s | 6.6 |
| 2013 | 28.7°C | 22.7°C | 16.8°C | 33.3°C | 13.2°C | 11 mm | 60% | 2.1 m/s | 5.4 |
| 2012 | 28.4°C | 22.0°C | 15.5°C | 32.7°C | 11.4°C | 8 mm | 56% | 2 m/s | 6.1 |
| 2011 | 28.1°C | 21.9°C | 15.7°C | 32.7°C | 12.8°C | 5 mm | 60% | 2 m/s | 6.4 |
| 2010 | 26.5°C | 20.6°C | 14.6°C | 34.4°C | 11.1°C | 1 mm | 64% | 2.2 m/s | 5.1 |
| 2009 | 30.1°C | 23.7°C | 17.2°C | 35.2°C | 12.0°C | 1 mm | 55% | 2.2 m/s | 6.8 |
| 2008 | 29.8°C | 23.2°C | 16.6°C | 32.9°C | 13.0°C | 1 mm | 57% | 2 m/s | 5.9 |
| 2007 | 29.4°C | 23.2°C | 16.9°C | 34.3°C | 13.5°C | 1 mm | 58% | 2 m/s | 5.8 |
| 2006 🔥 | 32.3°C | 26.4°C | 20.5°C | 38.4°C | 17.3°C | 3 mm | 56% | 2.1 m/s | 6.6 |
| 2005 | 30.4°C | 24.0°C | 17.5°C | 34.6°C | 12.8°C | 7 mm | 59% | 2 m/s | 5.7 |
| 2004 | 29.5°C | 23.1°C | 16.7°C | 33.4°C | 13.1°C | 1 mm | 59% | 2 m/s | 6.6 |
| 2003 | 30.5°C | 24.1°C | 17.7°C | 34.6°C | 13.5°C | 6 mm | 57% | 2.1 m/s | 5.7 |
| 2002 | 28.8°C | 22.3°C | 15.8°C | 33.3°C | 12.2°C | 1 mm | 60% | 2.1 m/s | 5.7 |
| 2001 | 28.4°C | 22.0°C | 15.6°C | 34.6°C | 12.6°C | 3 mm | 60% | 2.1 m/s | 6.2 |
| 2000 | 28.6°C | 22.3°C | 16.0°C | 34.5°C | 11.8°C | 3 mm | 58% | 2.2 m/s | 6.4 |
| 1999 | 27.8°C | 21.8°C | 15.9°C | 32.0°C | 11.6°C | 7 mm | 61% | 2.1 m/s | 6.5 |
| 1998 | 28.7°C | 22.9°C | 17.1°C | 34.9°C | 11.3°C | 4 mm | 62% | 2 m/s | 6 |
| 1997 | 27.9°C | 21.7°C | 15.4°C | 32.5°C | 13.4°C | 2 mm | 61% | 2.2 m/s | 6.4 |
| 1996 | 30.5°C | 24.2°C | 17.9°C | 34.2°C | 14.1°C | 3 mm | 55% | 2 m/s | 6.7 |
| 1995 | 30.1°C | 23.4°C | 16.7°C | 37.3°C | 12.4°C | 1 mm | 54% | 2 m/s | 6.2 |
| 1994 | 28.7°C | 22.2°C | 15.8°C | 32.6°C | 12.8°C | 1 mm | 60% | 2.1 m/s | 5.3 |
| 1993 ❄️ | 25.9°C | 20.2°C | 14.5°C | 32.7°C | 12.8°C | 1 mm | 70% | 2.2 m/s | 5.5 |
| 1992 | 29.3°C | 23.3°C | 17.3°C | 34.9°C | 12.8°C | 3 mm | 62% | 2.1 m/s | 5.8 |
| 1991 | 27.3°C | 21.0°C | 14.8°C | 32.8°C | 12.5°C | 14 mm | 63% | 2.1 m/s | 5.3 |
| 1990 | 30.6°C | 24.3°C | 17.9°C | 35.6°C | 14.2°C | 3 mm | 52% | 2 m/s | 6.7 |
| 1989 | 30.6°C | 23.9°C | 17.2°C | 36.3°C | 13.5°C | 2 mm | 52% | 2.1 m/s | 6.3 |
| 1988 | 30.5°C | 23.9°C | 17.2°C | 34.1°C | 13.4°C | 0 mm | 57% | 1.9 m/s | 5.2 |
| 1987 | 26.7°C | 20.3°C | 13.8°C | 33.4°C | 11.2°C | 2 mm | 62% | 2.2 m/s | 5.8 |
| 1986 | 28.7°C | 22.3°C | 16.0°C | 33.1°C | 12.9°C | 7 mm | 53% | 2.2 m/s | 6.4 |
| 1985 | 31.5°C | 24.9°C | 18.2°C | 36.6°C | 13.8°C | 14 mm | 50% | 2 m/s | 6.1 |
| 1984 🌧️ | 31.2°C | 25.2°C | 19.2°C | 35.1°C | 16.1°C | 29 mm | 58% | 1.9 m/s | 6.4 |
| 1983 | 28.8°C | 22.4°C | 16.1°C | 35.1°C | 12.7°C | 1 mm | 53% | 2 m/s | — |
| 1982 | 29.5°C | 22.9°C | 16.4°C | 33.5°C | 11.6°C | 3 mm | 50% | 2 m/s | — |
| 1981 | 31.4°C | 24.7°C | 18.0°C | 36.6°C | 14.8°C | 1 mm | 44% | 2 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 29.4°C with lows near 16.7°C (mean 23°C), based on 45 years of NASA POWER data.
July averages 4 mm of rainfall in Chula Vista, one of the drier months. The wettest on record was 29 mm in 1984.
The hottest July reached 40.9°C in 2018. The coldest dipped to 11.1°C in 2010.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have fallen by about 0.4°C. Daytime highs moved from 30.5°C to 30.2°C and overnight lows from 17.6°C to 17°C over the same span.
July is one of the warmer months of the year in Chula Vista and one of the drier months, so plan for around 29.4°C daytime highs and 16.7°C at night.
Not quite — July is the 10th coolest month in Chula Vista, averaging 23°C.
For July in Chula Vista, pack light layers you can adjust through the day, with typical highs of 29.4°C and lows of 16.7°C.
Relative humidity in July averages 57% — moderately humid.
Average wind speed in July is 2.1 m/s. The windiest July on record averaged 2.3 m/s (2014).
The wettest July on record was 1984 with 29 mm. On average, July sees 4 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 Chula Vista 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.
