July is one of the warmer months of the year in Truro, with average highs near 18.2°C and lows around 14.7°C (mean 16.5°C). It is one of the drier months, averaging 74 mm of rainfall and 83% relative humidity across the period.
July is one of the warmer months of the year in Truro. Across 45 years of records, the warmest July in Truro was 1983 — when the month averaged 18.6°C — while the coldest was 1988 at 14.6°C. Typical July days reach 18.2°C with nights near 14.7°C. The long-term trend is warming, about 0.2°C per decade.
July is one of the drier months in Truro, averaging 74 mm of rainfall. The wettest July on record was 2009 with 219 mm, while the driest was 1999 at 15 mm.
Relative humidity in Truro during July averages 83%. The most humid July was 1991 at 87%, and the least humid was 1984 at 77%.
July receives about 5.4 kWh/m²/day of solar energy in Truro. The sunniest July was 1990 at 6.6 kWh/m²/day, and the cloudiest was 2003 at 4.7.
Average wind speed in Truro during July is 5 m/s. The windiest July was 2009 at 6.8 m/s, while the calmest was 2018 at 3.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 16.4°C | 16.3°C | 16.2°C | 16.7°C | 17.0°C | +0.6°C |
| Avg High | 18.3°C | 18.1°C | 17.8°C | 18.5°C | 18.6°C | +0.3°C |
| Avg Low | 14.6°C | 14.5°C | 14.6°C | 15.0°C | 15.2°C | +0.6°C |
| Avg Rain | 56 mm | 57 mm | 104 mm | 73 mm | 80 mm | +24 mm |
July temperatures in Truro have risen by about 0.4°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 10°C (1997) to a record high of 27°C (1983).
Rainfall in July is one of the drier months, averaging 74 mm, with a wettest year of 219 mm.
One of the best times to visit Truro
July is one of the best times to visit Truro. Expect days averaging 18.2°C and nights around 14.7°C (mean 16.5°C) — warmer than Truro's yearly average — with moderate rainfall (74 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 | 19.5°C | 17.9°C | 16.3°C | 25.5°C | 14.8°C | 47 mm | 82% | 4.8 m/s | 5.6 |
| 2024 | 17.9°C | 16.3°C | 14.6°C | 23.3°C | 12.4°C | 115 mm | 84% | 4.8 m/s | 5.2 |
| 2023 | 18.1°C | 16.7°C | 15.3°C | 21.0°C | 14.0°C | 120 mm | 83% | 6.5 m/s | 5.1 |
| 2022 | 19.7°C | 17.6°C | 15.6°C | 25.2°C | 13.0°C | 17 mm | 80% | 4.6 m/s | 5.9 |
| 2021 | 19.3°C | 17.5°C | 15.6°C | 26.4°C | 13.1°C | 118 mm | 84% | 4.5 m/s | 5.6 |
| 2020 | 17.3°C | 15.7°C | 14.1°C | 21.1°C | 12.2°C | 61 mm | 84% | 5.6 m/s | 5.5 |
| 2019 | 19.2°C | 17.3°C | 15.4°C | 21.9°C | 13.2°C | 46 mm | 82% | 4.3 m/s | 6 |
| 2018 | 20.5°C | 18.4°C | 16.4°C | 22.8°C | 14.9°C | 53 mm | 80% | 3.8 m/s | 5.9 |
| 2017 | 18.0°C | 16.5°C | 14.9°C | 21.0°C | 13.4°C | 123 mm | 84% | 5.1 m/s | 5.2 |
| 2016 | 18.0°C | 16.4°C | 14.8°C | 22.9°C | 12.7°C | 41 mm | 84% | 5.1 m/s | 5.3 |
| 2015 | 17.5°C | 15.9°C | 14.4°C | 19.9°C | 12.4°C | 107 mm | 82% | 6 m/s | 5.3 |
| 2014 | 19.2°C | 17.6°C | 15.9°C | 23.7°C | 13.7°C | 46 mm | 82% | 4.3 m/s | 5.6 |
| 2013 | 19.8°C | 17.6°C | 15.4°C | 24.1°C | 12.6°C | 36 mm | 82% | 4.2 m/s | 6.4 |
| 2012 | 16.9°C | 15.4°C | 13.9°C | 22.1°C | 12.4°C | 115 mm | 85% | 5.4 m/s | 5.3 |
| 2011 | 17.3°C | 15.6°C | 14.0°C | 19.4°C | 12.6°C | 65 mm | 82% | 4.8 m/s | 5.5 |
| 2010 | 18.2°C | 16.7°C | 15.2°C | 20.0°C | 13.7°C | 103 mm | 84% | 5.5 m/s | 5 |
| 2009 🌧️ | 17.4°C | 16.1°C | 14.7°C | 23.4°C | 13.5°C | 219 mm | 83% | 6.8 m/s | 5 |
| 2008 | 17.3°C | 15.8°C | 14.3°C | 20.8°C | 12.3°C | 135 mm | 86% | 6 m/s | 5.1 |
| 2007 | 16.7°C | 15.4°C | 14.0°C | 18.4°C | 12.1°C | 115 mm | 84% | 6.1 m/s | 5.3 |
| 2006 | 20.4°C | 18.3°C | 16.2°C | 24.1°C | 13.4°C | 44 mm | 82% | 4.2 m/s | 5.7 |
| 2005 | 18.6°C | 16.9°C | 15.3°C | 24.6°C | 12.9°C | 83 mm | 85% | 4.8 m/s | 5.2 |
| 2004 | 16.9°C | 15.4°C | 13.9°C | 19.0°C | 12.2°C | 80 mm | 84% | 4.9 m/s | 5.1 |
| 2003 | 18.5°C | 16.8°C | 15.1°C | 23.4°C | 13.4°C | 116 mm | 84% | 5.1 m/s | 4.7 |
| 2002 | 16.7°C | 15.2°C | 13.7°C | 20.4°C | 11.3°C | 74 mm | 86% | 4.7 m/s | 5.2 |
| 2001 | 18.0°C | 16.3°C | 14.5°C | 24.8°C | 12.1°C | 101 mm | 84% | 4.5 m/s | 5 |
| 2000 | 17.6°C | 15.9°C | 14.2°C | 21.2°C | 12.2°C | 69 mm | 84% | 4.7 m/s | 5.8 |
| 1999 | 19.1°C | 17.1°C | 15.0°C | 22.2°C | 13.3°C | 15 mm | 83% | 4.5 m/s | 5.9 |
| 1998 | 16.7°C | 15.3°C | 14.0°C | 18.2°C | 12.8°C | 84 mm | 86% | 6 m/s | 5 |
| 1997 | 18.2°C | 16.2°C | 14.3°C | 22.0°C | 10.0°C | 35 mm | 84% | 4.1 m/s | 5.6 |
| 1996 | 17.8°C | 16.0°C | 14.2°C | 22.6°C | 11.5°C | 35 mm | 83% | 4.9 m/s | 5.8 |
| 1995 | 19.5°C | 17.5°C | 15.4°C | 24.3°C | 12.7°C | 34 mm | 82% | 4.6 m/s | 5.5 |
| 1994 | 18.2°C | 16.3°C | 14.3°C | 21.4°C | 12.7°C | 51 mm | 84% | 4.4 m/s | 5.4 |
| 1993 | 16.5°C | 15.1°C | 13.8°C | 18.4°C | 11.8°C | 111 mm | 85% | 5.8 m/s | 5.2 |
| 1992 | 18.4°C | 16.6°C | 14.8°C | 21.5°C | 13.4°C | 77 mm | 83% | 5.1 m/s | 5.1 |
| 1991 | 17.6°C | 15.9°C | 14.2°C | 22.3°C | 12.7°C | 78 mm | 87% | 5.5 m/s | 4.9 |
| 1990 | 19.1°C | 16.8°C | 14.6°C | 23.8°C | 11.6°C | 53 mm | 78% | 5.5 m/s | 6.6 |
| 1989 | 20.0°C | 17.9°C | 15.8°C | 24.6°C | 13.6°C | 25 mm | 82% | 4.5 m/s | 6 |
| 1988 ❄️ | 16.0°C | 14.6°C | 13.1°C | 17.9°C | 12.3°C | 117 mm | 85% | 6.5 m/s | 5 |
| 1987 | 17.8°C | 16.1°C | 14.4°C | 22.1°C | 12.1°C | 55 mm | 83% | 4.6 m/s | 5.6 |
| 1986 | 17.1°C | 15.6°C | 14.1°C | 20.3°C | 12.7°C | 55 mm | 84% | 4.7 m/s | 4.8 |
| 1985 | 17.7°C | 15.9°C | 14.0°C | 22.7°C | 12.1°C | 53 mm | 83% | 4.9 m/s | 5.2 |
| 1984 | 19.5°C | 17.2°C | 14.8°C | 23.3°C | 11.5°C | 38 mm | 77% | 4.3 m/s | 6.1 |
| 1983 🔥 | 21.1°C | 18.6°C | 16.1°C | 27.0°C | 11.7°C | 35 mm | 82% | 3.9 m/s | — |
| 1982 | 18.4°C | 16.5°C | 14.6°C | 21.2°C | 12.7°C | 54 mm | 84% | 4 m/s | — |
| 1981 | 17.0°C | 15.6°C | 14.1°C | 20.9°C | 12.0°C | 72 mm | 85% | 5.4 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 18.2°C with lows near 14.7°C (mean 16.5°C), based on 45 years of NASA POWER data.
July averages 74 mm of rainfall in Truro, one of the drier months. The wettest on record was 219 mm in 2009.
The hottest July reached 27°C in 1983. The coldest dipped to 10°C in 1997.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 0.4°C. Daytime highs moved from 18.7°C to 18.9°C and overnight lows from 14.7°C to 15.5°C over the same span.
July is one of the warmer months of the year in Truro and one of the drier months, so plan for around 18.2°C daytime highs and 14.7°C at night.
Not quite — July is the 11th coolest month in Truro, averaging 16.5°C.
For July in Truro, pack light layers you can adjust through the day, with typical highs of 18.2°C and lows of 14.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 83% — quite humid.
Average wind speed in July is 5 m/s. The windiest July on record averaged 6.8 m/s (2009).
The wettest July on record was 2009 with 219 mm. On average, July sees 74 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 Truro 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.
