June is one of the warmer months of the year in El Cajon, with average highs near 28.9°C and lows around 13.5°C (mean 21.2°C). It is one of the drier months, averaging 3 mm of rainfall and 54% relative humidity across the period.
June is one of the warmer months of the year in El Cajon. Across 45 years of records, the warmest June in El Cajon was 1981 — when the month averaged 25.1°C — while the coldest was 1998 at 17.4°C. Typical June days reach 28.9°C with nights near 13.5°C. The long-term June temperature trend is broadly flat.
June is one of the drier months in El Cajon, averaging 3 mm of rainfall. The wettest June on record was 2020 with 22 mm, while the driest were 2013, 2017 and 2018, among others at 0 mm.
Relative humidity in El Cajon during June averages 54%. The most humid June was 1998 at 73%, and the least humid was 1981 at 32%.
June receives about 8.1 kWh/m²/day of solar energy in El Cajon. The sunniest June was 2014 at 8.7 kWh/m²/day, and the cloudiest was 1988 at 7.2.
Average wind speed in El Cajon during June is 2.5 m/s. The windiest June was 1982 at 3.1 m/s, while the calmest were 1994, 2006 and 2007 at 2.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 21.6°C | 20.4°C | 21.4°C | 21.3°C | 21.6°C | 0°C |
| Avg High | 29.6°C | 27.7°C | 29.1°C | 29.2°C | 29.1°C | -0.5°C |
| Avg Low | 13.5°C | 13.0°C | 13.7°C | 13.4°C | 14.0°C | +0.5°C |
| Avg Rain | 1 mm | 6 mm | 1 mm | 1 mm | 5 mm | +4 mm |
June temperatures in El Cajon have risen by about 0.4°C between 1981–1985 and 2021–2025.
June has ranged from a record low of 6.1°C (2011) to a record high of 42.8°C (2016).
Rainfall in June is one of the drier months, averaging 3 mm, with a wettest year of 22 mm.
One of the best times to visit El Cajon
June is one of the best times to visit El Cajon. Expect days averaging 28.9°C and nights around 13.5°C (mean 21.2°C) — warmer than El Cajon's yearly average — with low rainfall (3 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 | 30.1°C | 22.0°C | 13.8°C | 37.1°C | 9.9°C | 1 mm | 53% | 2.5 m/s | 8.2 |
| 2024 | 29.3°C | 21.6°C | 13.9°C | 35.8°C | 9.6°C | 0 mm | 57% | 2.4 m/s | 8.3 |
| 2023 | 23.8°C | 17.6°C | 11.3°C | 37.0°C | 10.0°C | 3 mm | 71% | 2.9 m/s | 7.9 |
| 2022 | 32.1°C | 24.0°C | 15.9°C | 37.8°C | 10.3°C | 1 mm | 45% | 2.3 m/s | 8.4 |
| 2021 | 31.7°C | 23.8°C | 15.8°C | 40.1°C | 8.8°C | 0 mm | 44% | 2.3 m/s | 8 |
| 2020 🌧️ | 27.6°C | 20.4°C | 13.1°C | 34.7°C | 8.3°C | 22 mm | 60% | 2.6 m/s | 8.3 |
| 2019 | 28.0°C | 20.4°C | 12.9°C | 34.8°C | 9.6°C | 2 mm | 61% | 2.3 m/s | 8 |
| 2018 | 30.0°C | 21.5°C | 13.0°C | 36.1°C | 9.5°C | 0 mm | 50% | 2.4 m/s | 8.5 |
| 2017 | 30.8°C | 22.7°C | 14.6°C | 38.3°C | 8.8°C | 0 mm | 50% | 2.4 m/s | 8.4 |
| 2016 | 31.9°C | 23.9°C | 15.9°C | 42.8°C | 10.2°C | 1 mm | 45% | 2.3 m/s | 8.2 |
| 2015 | 30.5°C | 23.1°C | 15.8°C | 35.6°C | 10.7°C | 4 mm | 49% | 2.4 m/s | 7.7 |
| 2014 | 29.8°C | 21.5°C | 13.2°C | 35.6°C | 10.4°C | 0 mm | 51% | 2.5 m/s | 8.7 |
| 2013 | 29.5°C | 21.5°C | 13.5°C | 40.2°C | 10.4°C | 0 mm | 53% | 2.6 m/s | 8.4 |
| 2012 | 28.7°C | 20.4°C | 12.2°C | 33.4°C | 8.7°C | 0 mm | 50% | 2.5 m/s | 8.6 |
| 2011 | 25.7°C | 18.5°C | 11.2°C | 34.7°C | 6.1°C | 1 mm | 62% | 2.6 m/s | 8.6 |
| 2010 | 26.7°C | 19.2°C | 11.7°C | 33.1°C | 8.9°C | 0 mm | 63% | 2.4 m/s | 8.4 |
| 2009 | 26.0°C | 19.5°C | 13.1°C | 36.6°C | 9.7°C | 0 mm | 62% | 2.9 m/s | 7.7 |
| 2008 | 31.8°C | 23.3°C | 14.7°C | 40.1°C | 7.7°C | 1 mm | 43% | 2.2 m/s | 8.6 |
| 2007 | 30.0°C | 21.5°C | 13.1°C | 35.4°C | 8.6°C | 0 mm | 46% | 2.1 m/s | 8.6 |
| 2006 | 31.9°C | 24.1°C | 16.4°C | 39.9°C | 10.6°C | 1 mm | 47% | 2.1 m/s | 7.9 |
| 2005 | 26.1°C | 19.0°C | 12.0°C | 32.2°C | 9.6°C | 0 mm | 64% | 2.8 m/s | 8.3 |
| 2004 | 28.8°C | 20.8°C | 12.8°C | 33.2°C | 9.7°C | 0 mm | 58% | 2.5 m/s | 8.5 |
| 2003 | 26.8°C | 19.7°C | 12.7°C | 36.6°C | 9.9°C | 1 mm | 63% | 2.7 m/s | 7.9 |
| 2002 | 28.9°C | 20.8°C | 12.7°C | 38.2°C | 9.8°C | 0 mm | 52% | 2.5 m/s | 8.6 |
| 2001 | 30.3°C | 22.6°C | 14.9°C | 34.8°C | 10.1°C | 0 mm | 47% | 2.4 m/s | 8.3 |
| 2000 | 30.3°C | 22.3°C | 14.3°C | 37.9°C | 10.3°C | 9 mm | 52% | 2.4 m/s | 8.2 |
| 1999 | 27.2°C | 19.8°C | 12.4°C | 35.3°C | 8.0°C | 9 mm | 55% | 2.6 m/s | 8.1 |
| 1998 ❄️ | 23.3°C | 17.4°C | 11.5°C | 29.9°C | 9.5°C | 3 mm | 73% | 3 m/s | 7.7 |
| 1997 | 27.2°C | 20.1°C | 13.0°C | 35.0°C | 11.0°C | 4 mm | 64% | 3 m/s | 8.2 |
| 1996 | 29.5°C | 21.5°C | 13.5°C | 36.7°C | 10.0°C | 0 mm | 50% | 2.4 m/s | 8.5 |
| 1995 | 26.1°C | 18.9°C | 11.8°C | 35.4°C | 7.7°C | 11 mm | 63% | 2.4 m/s | 7.5 |
| 1994 | 31.0°C | 23.0°C | 15.0°C | 41.1°C | 9.8°C | 0 mm | 49% | 2.1 m/s | 8.1 |
| 1993 | 29.1°C | 21.5°C | 14.0°C | 37.6°C | 10.0°C | 13 mm | 56% | 2.4 m/s | 8.1 |
| 1992 | 27.3°C | 20.0°C | 12.7°C | 33.2°C | 9.9°C | 0 mm | 60% | 2.8 m/s | 7.9 |
| 1991 | 25.5°C | 18.2°C | 10.9°C | 32.9°C | 7.3°C | 0 mm | 63% | 2.6 m/s | 7.9 |
| 1990 | 31.2°C | 23.2°C | 15.1°C | 40.5°C | 9.2°C | 15 mm | 45% | 2.5 m/s | 8.1 |
| 1989 | 29.3°C | 21.4°C | 13.5°C | 38.3°C | 10.1°C | 0 mm | 50% | 2.8 m/s | 8.1 |
| 1988 | 28.7°C | 20.5°C | 12.4°C | 35.4°C | 6.7°C | 1 mm | 53% | 2.5 m/s | 7.2 |
| 1987 | 31.1°C | 22.7°C | 14.4°C | 36.4°C | 9.6°C | 2 mm | 44% | 2.3 m/s | 8.1 |
| 1986 | 31.0°C | 22.6°C | 14.1°C | 37.7°C | 10.1°C | 0 mm | 45% | 2.2 m/s | 8 |
| 1985 | 31.5°C | 23.1°C | 14.6°C | 37.9°C | 8.3°C | 2 mm | 40% | 2.4 m/s | 8.1 |
| 1984 | 29.7°C | 21.8°C | 14.0°C | 37.2°C | 9.9°C | 2 mm | 47% | 2.6 m/s | 7.3 |
| 1983 | 26.5°C | 19.0°C | 11.5°C | 33.2°C | 8.4°C | 0 mm | 62% | 2.6 m/s | — |
| 1982 | 25.3°C | 18.0°C | 10.8°C | 30.7°C | 7.5°C | 2 mm | 64% | 3.1 m/s | — |
| 1981 🔥 | 33.7°C | 25.1°C | 16.6°C | 38.6°C | 10.6°C | 0 mm | 32% | 2.5 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 28.9°C with lows near 13.5°C (mean 21.2°C), based on 45 years of NASA POWER data.
June averages 3 mm of rainfall in El Cajon, one of the drier months. The wettest on record was 22 mm in 2020.
The hottest June reached 42.8°C in 2016. The coldest dipped to 6.1°C in 2011.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have risen by about 0.4°C. Daytime highs moved from 29.3°C to 29.4°C and overnight lows from 13.5°C to 14.1°C over the same span.
June is one of the warmer months of the year in El Cajon and one of the drier months, so plan for around 28.9°C daytime highs and 13.5°C at night.
Not quite — June is the 9th coolest month in El Cajon, averaging 21.2°C.
For June in El Cajon, pack light layers you can adjust through the day, with typical highs of 28.9°C and lows of 13.5°C.
Relative humidity in June averages 54% — relatively dry.
Average wind speed in June is 2.5 m/s. The windiest June on record averaged 3.1 m/s (1982).
The wettest June on record was 2020 with 22 mm. On average, June sees 3 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 El Cajon behaves each June, 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 June specifically, along with year-by-year records and how the month has changed over the decades.
