July is one of the warmer months of the year in Delta, with average highs near 21.1°C and lows around 14.4°C (mean 17.8°C). It is one of the drier months, averaging 31 mm of rainfall and 76% relative humidity across the period.
July is one of the warmer months of the year in Delta. Across 45 years of records, the warmest Julys in Delta were 2015 and 2018 — when the month averaged 19.6°C — while the coldest was 1986 at 15.4°C. Typical July days reach 21.1°C with nights near 14.4°C. The long-term trend is warming, about 0.4°C per decade.
July is one of the drier months in Delta, averaging 31 mm of rainfall. The wettest July on record was 1983 with 92 mm, while the driest was 1985 at 2 mm.
Relative humidity in Delta during July averages 76%. The most humid July was 2025 at 81%, and the least humid was 1985 at 71%.
July receives about 6.1 kWh/m²/day of solar energy in Delta. The sunniest July was 2013 at 7.4 kWh/m²/day, and the cloudiest was 1993 at 4.6.
Average wind speed in Delta during July is 1 m/s. The windiest July was 2025 at 1.4 m/s, while the calmest were 1985 and 2009 at 0.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 16.7°C | 17.8°C | 17.9°C | 18.2°C | 18.3°C | +1.6°C |
| Avg High | 20.1°C | 21.1°C | 21.3°C | 21.4°C | 21.8°C | +1.7°C |
| Avg Low | 13.3°C | 14.5°C | 14.5°C | 14.8°C | 14.8°C | +1.5°C |
| Avg Rain | 37 mm | 36 mm | 31 mm | 24 mm | 23 mm | -14 mm |
July temperatures in Delta have risen by about 1.4°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 9.7°C (1988) to a record high of 31.9°C (2004).
Rainfall in July is one of the drier months, averaging 31 mm, with a wettest year of 92 mm.
One of the best times to visit Delta
July is one of the best times to visit Delta. Expect days averaging 21.1°C and nights around 14.4°C (mean 17.8°C) — warmer than Delta's yearly average — with moderate rainfall (31 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 | 20.1°C | 16.7°C | 13.4°C | 26.0°C | 11.6°C | 29 mm | 81% | 1.4 m/s | 6.7 |
| 2024 | 22.9°C | 19.1°C | 15.3°C | 27.7°C | 12.8°C | 23 mm | 75% | 0.9 m/s | 6.9 |
| 2023 | 22.3°C | 18.4°C | 14.6°C | 28.2°C | 12.2°C | 21 mm | 74% | 1 m/s | 6.7 |
| 2022 | 22.1°C | 18.8°C | 15.5°C | 30.9°C | 12.8°C | 28 mm | 78% | 0.9 m/s | 6.1 |
| 2021 | 23.0°C | 19.3°C | 15.7°C | 31.2°C | 13.4°C | 4 mm | 73% | 1 m/s | 6.8 |
| 2020 | 20.7°C | 17.6°C | 14.5°C | 29.0°C | 11.9°C | 36 mm | 76% | 1.1 m/s | 5.7 |
| 2019 | 20.8°C | 18.1°C | 15.3°C | 26.1°C | 13.1°C | 47 mm | 76% | 1.1 m/s | 5.4 |
| 2018 | 23.2°C | 19.6°C | 15.9°C | 28.8°C | 11.7°C | 14 mm | 72% | 1 m/s | 6.9 |
| 2017 | 21.5°C | 17.9°C | 14.3°C | 26.9°C | 13.0°C | 7 mm | 76% | 1.1 m/s | 6.9 |
| 2016 | 20.8°C | 18.2°C | 15.5°C | 25.6°C | 13.5°C | 36 mm | 78% | 1.2 m/s | 5.4 |
| 2015 🔥 | 23.2°C | 19.6°C | 16.0°C | 29.7°C | 13.8°C | 24 mm | 72% | 1 m/s | 6.4 |
| 2014 | 22.4°C | 18.9°C | 15.3°C | 26.9°C | 12.8°C | 31 mm | 75% | 1 m/s | 6.5 |
| 2013 | 22.2°C | 18.6°C | 14.9°C | 28.2°C | 12.7°C | 3 mm | 75% | 1 m/s | 7.4 |
| 2012 | 20.0°C | 16.9°C | 13.8°C | 24.8°C | 10.5°C | 39 mm | 79% | 0.9 m/s | 5.9 |
| 2011 | 19.1°C | 16.2°C | 13.3°C | 24.3°C | 10.9°C | 39 mm | 78% | 1 m/s | 5.1 |
| 2010 | 21.1°C | 17.5°C | 13.9°C | 28.6°C | 10.7°C | 3 mm | 74% | 0.9 m/s | 6.9 |
| 2009 | 22.9°C | 19.1°C | 15.4°C | 31.5°C | 11.6°C | 11 mm | 72% | 0.8 m/s | 6.6 |
| 2008 | 20.2°C | 16.8°C | 13.3°C | 24.1°C | 10.9°C | 25 mm | 75% | 1 m/s | 6 |
| 2007 | 21.3°C | 18.1°C | 14.8°C | 30.8°C | 12.7°C | 53 mm | 77% | 1 m/s | 5.7 |
| 2006 | 21.5°C | 18.1°C | 14.8°C | 29.6°C | 12.4°C | 21 mm | 74% | 1 m/s | 6.1 |
| 2005 | 20.4°C | 17.2°C | 13.9°C | 24.3°C | 11.4°C | 55 mm | 78% | 1 m/s | 5.9 |
| 2004 | 22.8°C | 19.1°C | 15.5°C | 31.9°C | 13.0°C | 12 mm | 73% | 0.9 m/s | 6.4 |
| 2003 | 22.3°C | 18.7°C | 15.1°C | 28.5°C | 11.8°C | 13 mm | 72% | 0.9 m/s | 6.7 |
| 2002 | 21.3°C | 17.9°C | 14.4°C | 29.6°C | 10.3°C | 18 mm | 74% | 1 m/s | 6 |
| 2001 | 20.0°C | 16.8°C | 13.7°C | 25.3°C | 11.1°C | 27 mm | 76% | 1 m/s | 5.9 |
| 2000 | 19.8°C | 16.9°C | 14.0°C | 24.8°C | 11.6°C | 71 mm | 79% | 1.1 m/s | 5.5 |
| 1999 | 19.5°C | 16.4°C | 13.3°C | 25.8°C | 10.2°C | 38 mm | 78% | 1.1 m/s | 6 |
| 1998 | 22.2°C | 18.9°C | 15.7°C | 30.0°C | 13.0°C | 45 mm | 79% | 1 m/s | 6.1 |
| 1997 | 20.5°C | 17.4°C | 14.3°C | 26.0°C | 12.6°C | 69 mm | 79% | 1.1 m/s | 5.7 |
| 1996 | 21.7°C | 18.2°C | 14.7°C | 27.3°C | 11.1°C | 27 mm | 75% | 1.1 m/s | 6.6 |
| 1995 | 21.4°C | 18.2°C | 14.9°C | 28.1°C | 12.3°C | 43 mm | 75% | 1.1 m/s | 5.5 |
| 1994 | 22.0°C | 18.3°C | 14.5°C | 28.3°C | 11.0°C | 20 mm | 72% | 0.9 m/s | 6.5 |
| 1993 | 19.0°C | 16.3°C | 13.5°C | 21.2°C | 11.6°C | 45 mm | 79% | 1.2 m/s | 4.6 |
| 1992 | 21.8°C | 18.6°C | 15.3°C | 27.0°C | 13.6°C | 34 mm | 77% | 1 m/s | 5.3 |
| 1991 | 20.6°C | 17.2°C | 13.8°C | 29.4°C | 11.8°C | 32 mm | 76% | 1 m/s | 5.9 |
| 1990 | 22.7°C | 18.8°C | 15.0°C | 27.9°C | 11.2°C | 12 mm | 74% | 1 m/s | 6.4 |
| 1989 | 19.9°C | 16.7°C | 13.6°C | 23.8°C | 11.4°C | 31 mm | 76% | 1.1 m/s | 6 |
| 1988 | 20.3°C | 16.6°C | 12.9°C | 28.2°C | 9.7°C | 38 mm | 74% | 1 m/s | 5.9 |
| 1987 | 19.5°C | 16.1°C | 12.7°C | 22.9°C | 10.4°C | 28 mm | 75% | 1 m/s | 5.6 |
| 1986 ❄️ | 18.4°C | 15.4°C | 12.5°C | 22.3°C | 10.0°C | 57 mm | 78% | 1.1 m/s | 4.9 |
| 1985 | 22.6°C | 18.4°C | 14.2°C | 26.4°C | 11.6°C | 2 mm | 71% | 0.8 m/s | 6.8 |
| 1984 | 20.4°C | 16.7°C | 13.0°C | 26.4°C | 10.2°C | 9 mm | 75% | 1 m/s | 6.2 |
| 1983 🌧️ | 19.5°C | 16.3°C | 13.2°C | 26.2°C | 11.2°C | 92 mm | 76% | 1.2 m/s | — |
| 1982 | 19.8°C | 16.7°C | 13.6°C | 26.8°C | 10.6°C | 50 mm | 75% | 1 m/s | — |
| 1981 | 20.3°C | 17.2°C | 14.0°C | 26.0°C | 10.6°C | 30 mm | 77% | 1.1 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 21.1°C with lows near 14.4°C (mean 17.8°C), based on 45 years of NASA POWER data.
July averages 31 mm of rainfall in Delta, one of the drier months. The wettest on record was 92 mm in 1983.
The hottest July reached 31.9°C in 2004. The coldest dipped to 9.7°C in 1988.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 1.4°C. Daytime highs moved from 20.5°C to 22.1°C and overnight lows from 13.6°C to 14.9°C over the same span.
July is one of the warmer months of the year in Delta and one of the drier months, so plan for around 21.1°C daytime highs and 14.4°C at night.
Not quite — July is the 11th coolest month in Delta, averaging 17.8°C.
For July in Delta, pack light layers you can adjust through the day, with typical highs of 21.1°C and lows of 14.4°C.
Relative humidity in July averages 76% — quite humid.
Average wind speed in July is 1 m/s. The windiest July on record averaged 1.4 m/s (2025).
The wettest July on record was 1983 with 92 mm. On average, July sees 31 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 Delta 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.
