April is one of the cooler months of the year in Chula Vista, with average highs near 21.1°C and lows around 10.5°C (mean 15.8°C). It is about average for rainfall, averaging 17 mm of rainfall and 67% relative humidity across the period.
April is one of the cooler months of the year in Chula Vista. Across 45 years of records, the warmest April in Chula Vista was 1987 — when the month averaged 18.3°C — while the coldest was 1999 at 13.2°C. Typical April days reach 21.1°C with nights near 10.5°C. The long-term April temperature trend is broadly flat.
April is about average for rainfall in Chula Vista, averaging 17 mm of rainfall. The wettest April on record was 2020 with 71 mm, while the driest was 1993 at 0 mm.
Relative humidity in Chula Vista during April averages 67%. The most humid April was 2020 at 74%, and the least humid was 1987 at 54%.
April receives about 6.1 kWh/m²/day of solar energy in Chula Vista. The sunniest April was 2017 at 6.9 kWh/m²/day, and the cloudiest were 1985 and 1994 at 5.3.
Average wind speed in Chula Vista during April is 2.5 m/s. The windiest Aprils were 1999 and 2003 at 3.1 m/s, while the calmest was 1992 at 2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 16.2°C | 15.8°C | 15.2°C | 16.2°C | 15.7°C | -0.5°C |
| Avg High | 21.9°C | 21.0°C | 20.4°C | 21.5°C | 20.7°C | -1.2°C |
| Avg Low | 10.6°C | 10.7°C | 10.0°C | 10.9°C | 10.6°C | 0°C |
| Avg Rain | 21 mm | 16 mm | 14 mm | 15 mm | 18 mm | -4 mm |
April temperatures in Chula Vista have stayed relatively stable across the record.
April has ranged from a record low of 4.1°C (1999) to a record high of 34.4°C (1989).
Rainfall in April is about average for rainfall, averaging 17 mm, with a wettest year of 71 mm.
A good time to visit Chula Vista
April is a good time to visit Chula Vista, with days averaging 21.1°C and nights around 10.5°C (mean 15.8°C, cooler than Chula Vista's yearly average) and low rainfall. July and September are marginally more temperate, but April still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 20.3°C | 15.3°C | 10.4°C | 27.0°C | 7.8°C | 9 mm | 69% | 2.5 m/s | 6.1 |
| 2024 | 20.0°C | 15.1°C | 10.1°C | 26.2°C | 7.2°C | 13 mm | 72% | 2.5 m/s | 6.2 |
| 2023 | 20.3°C | 14.9°C | 9.5°C | 27.8°C | 4.4°C | 3 mm | 70% | 2.1 m/s | 5.4 |
| 2022 | 22.4°C | 16.8°C | 11.3°C | 32.6°C | 8.4°C | 5 mm | 66% | 2.6 m/s | 6.7 |
| 2021 | 21.3°C | 15.9°C | 10.5°C | 30.7°C | 7.1°C | 4 mm | 68% | 2.4 m/s | 6.2 |
| 2020 🌧️ | 20.1°C | 15.9°C | 11.6°C | 31.9°C | 7.7°C | 71 mm | 74% | 2.5 m/s | 5.7 |
| 2019 | 21.4°C | 16.5°C | 11.6°C | 28.1°C | 9.6°C | 6 mm | 71% | 2.4 m/s | 6.1 |
| 2018 | 22.0°C | 16.4°C | 10.8°C | 31.2°C | 6.9°C | 2 mm | 63% | 2.4 m/s | 6.3 |
| 2017 | 22.4°C | 16.8°C | 11.2°C | 29.3°C | 8.6°C | 1 mm | 68% | 2.1 m/s | 6.9 |
| 2016 | 22.0°C | 17.1°C | 12.2°C | 28.9°C | 9.5°C | 23 mm | 65% | 2.4 m/s | 6.3 |
| 2015 | 22.7°C | 17.2°C | 11.6°C | 31.5°C | 7.9°C | 6 mm | 62% | 2.3 m/s | 6.8 |
| 2014 | 22.9°C | 17.2°C | 11.5°C | 31.3°C | 7.7°C | 12 mm | 62% | 2.7 m/s | 6.2 |
| 2013 | 21.3°C | 15.7°C | 10.2°C | 27.5°C | 7.6°C | 1 mm | 68% | 2.6 m/s | 5.6 |
| 2012 | 21.7°C | 15.9°C | 10.2°C | 28.9°C | 6.0°C | 39 mm | 66% | 2.4 m/s | 5.9 |
| 2011 | 20.2°C | 15.3°C | 10.3°C | 29.7°C | 5.8°C | 11 mm | 70% | 2.5 m/s | 6.1 |
| 2010 | 18.5°C | 13.7°C | 9.0°C | 24.0°C | 6.5°C | 46 mm | 72% | 2.8 m/s | 6.2 |
| 2009 | 20.1°C | 14.9°C | 9.7°C | 33.1°C | 7.1°C | 5 mm | 67% | 2.6 m/s | 6.1 |
| 2008 | 21.7°C | 16.0°C | 10.2°C | 31.0°C | 6.8°C | 0 mm | 60% | 2.5 m/s | 6.5 |
| 2007 | 20.7°C | 15.2°C | 9.7°C | 29.2°C | 6.5°C | 10 mm | 68% | 2.4 m/s | 5.5 |
| 2006 | 19.2°C | 14.3°C | 9.5°C | 26.5°C | 6.4°C | 26 mm | 73% | 2.6 m/s | 6.1 |
| 2005 | 20.3°C | 15.2°C | 10.1°C | 25.4°C | 7.6°C | 10 mm | 69% | 2.6 m/s | 6.5 |
| 2004 | 21.9°C | 16.7°C | 11.4°C | 31.2°C | 8.4°C | 14 mm | 67% | 2.4 m/s | 6.3 |
| 2003 | 18.4°C | 13.8°C | 9.2°C | 27.0°C | 6.7°C | 30 mm | 72% | 3.1 m/s | 6.7 |
| 2002 | 20.4°C | 15.0°C | 9.7°C | 30.1°C | 6.7°C | 15 mm | 70% | 2.7 m/s | 5.4 |
| 2001 | 18.9°C | 14.0°C | 9.0°C | 28.9°C | 5.0°C | 20 mm | 69% | 2.8 m/s | 5.6 |
| 2000 | 22.4°C | 16.8°C | 11.1°C | 29.5°C | 9.1°C | 12 mm | 67% | 2.5 m/s | 6.2 |
| 1999 ❄️ | 17.9°C | 13.2°C | 8.5°C | 30.2°C | 4.1°C | 38 mm | 68% | 3.1 m/s | 5.8 |
| 1998 | 18.7°C | 14.3°C | 9.9°C | 28.2°C | 6.1°C | 36 mm | 71% | 2.8 m/s | 6.3 |
| 1997 | 21.9°C | 16.4°C | 10.9°C | 28.6°C | 6.3°C | 5 mm | 64% | 2.6 m/s | 6.6 |
| 1996 | 23.6°C | 17.6°C | 11.7°C | 31.4°C | 8.7°C | 7 mm | 59% | 2.4 m/s | 6.7 |
| 1995 | 19.4°C | 14.7°C | 10.0°C | 26.7°C | 7.5°C | 26 mm | 68% | 2.9 m/s | 6.3 |
| 1994 | 20.9°C | 15.6°C | 10.3°C | 28.6°C | 8.5°C | 25 mm | 69% | 2.5 m/s | 5.3 |
| 1993 | 22.2°C | 16.9°C | 11.5°C | 27.1°C | 9.3°C | 0 mm | 67% | 2.1 m/s | 6.4 |
| 1992 | 23.5°C | 18.1°C | 12.7°C | 30.1°C | 9.8°C | 8 mm | 67% | 2 m/s | 5.9 |
| 1991 | 20.1°C | 15.0°C | 9.8°C | 27.9°C | 7.0°C | 2 mm | 67% | 2.5 m/s | 6.5 |
| 1990 | 21.7°C | 16.6°C | 11.5°C | 27.7°C | 9.1°C | 17 mm | 69% | 2.5 m/s | 5.6 |
| 1989 | 24.4°C | 18.2°C | 11.9°C | 34.4°C | 7.1°C | 2 mm | 61% | 2.3 m/s | 5.6 |
| 1988 | 21.5°C | 16.3°C | 11.2°C | 30.6°C | 8.0°C | 65 mm | 64% | 2.7 m/s | 6 |
| 1987 🔥 | 24.7°C | 18.3°C | 12.0°C | 30.8°C | 7.9°C | 11 mm | 54% | 2.1 m/s | 5.8 |
| 1986 | 21.0°C | 15.5°C | 10.0°C | 28.9°C | 8.0°C | 11 mm | 66% | 2.5 m/s | 6.3 |
| 1985 | 23.2°C | 17.1°C | 11.0°C | 32.1°C | 7.8°C | 7 mm | 58% | 2.2 m/s | 5.3 |
| 1984 | 21.8°C | 16.2°C | 10.6°C | 31.4°C | 7.7°C | 12 mm | 59% | 2.9 m/s | 6.2 |
| 1983 | 17.8°C | 13.3°C | 8.8°C | 24.6°C | 5.0°C | 51 mm | 72% | 3 m/s | — |
| 1982 | 20.3°C | 15.1°C | 10.0°C | 27.1°C | 5.9°C | 18 mm | 67% | 2.6 m/s | — |
| 1981 | 22.1°C | 16.1°C | 10.2°C | 30.7°C | 6.6°C | 16 mm | 62% | 2.3 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 21.1°C with lows near 10.5°C (mean 15.8°C), based on 45 years of NASA POWER data.
April averages 17 mm of rainfall in Chula Vista, about average for rainfall. The wettest on record was 71 mm in 2020.
The hottest April reached 34.4°C in 1989. The coldest dipped to 4.1°C in 1999.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have held steady by about 0°C — but days and nights have moved in opposite directions. Overnight lows rose from 10.1°C to 10.4°C while daytime highs eased from 21°C to 20.9°C, narrowing the gap between day and night.
April is one of the cooler months of the year in Chula Vista and about average for rainfall, so plan for around 21.1°C daytime highs and 10.5°C at night.
Not quite — April is the 5th coolest month in Chula Vista, averaging 15.8°C.
For April in Chula Vista, pack light layers you can adjust through the day, with typical highs of 21.1°C and lows of 10.5°C.
Relative humidity in April averages 67% — moderately humid.
Average wind speed in April is 2.5 m/s. The windiest April on record averaged 3.1 m/s (1999).
The wettest April on record was 2020 with 71 mm. On average, April sees 17 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 April, 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 April specifically, along with year-by-year records and how the month has changed over the decades.
