July is one of the warmer months of the year in Dieppe, with average highs near 23.9°C and lows around 13.4°C (mean 18.7°C). It is about average for rainfall, averaging 89 mm of rainfall and 83% relative humidity across the period.
July is one of the warmer months of the year in Dieppe. Across 45 years of records, the warmest July in Dieppe was 2023 — when the month averaged 21.4°C — while the coldest was 1992 at 16°C. Typical July days reach 23.9°C with nights near 13.4°C. The long-term trend is warming, about 0.4°C per decade.
July is about average for rainfall in Dieppe, averaging 89 mm of rainfall. The wettest Julys on record were 2011 and 2021 with 148 mm, while the driest was 1987 at 30 mm.
Relative humidity in Dieppe during July averages 83%. The most humid July was 2023 at 86%, and the least humid was 2025 at 79%.
July receives about 5.5 kWh/m²/day of solar energy in Dieppe. The sunniest July was 2017 at 6.3 kWh/m²/day, and the cloudiest were 1988 and 1996 at 4.8.
Average wind speed in Dieppe during July is 0.1 m/s. The windiest Julys were 2023, 2024 and 2025, among others at 0.1 m/s, while the calmest were 2023, 2024 and 2025, among others at 0.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 18.1°C | 18.5°C | 18.4°C | 19.1°C | 19.8°C | +1.7°C |
| Avg High | 23.3°C | 23.6°C | 23.6°C | 24.4°C | 25.0°C | +1.7°C |
| Avg Low | 12.8°C | 13.3°C | 13.2°C | 13.8°C | 14.5°C | +1.7°C |
| Avg Rain | 97 mm | 86 mm | 88 mm | 86 mm | 92 mm | -4 mm |
July temperatures in Dieppe have risen by about 1.4°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 6.2°C (2009) to a record high of 31°C (2013).
Rainfall in July is about average for rainfall, averaging 89 mm, with a wettest year of 148 mm.
One of the best times to visit Dieppe
July is one of the best times to visit Dieppe. Expect days averaging 23.9°C and nights around 13.4°C (mean 18.7°C) — warmer than Dieppe's yearly average — with higher rainfall (89 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 | 25.6°C | 19.8°C | 14.1°C | 30.6°C | 9.7°C | 42 mm | 79% | 0.1 m/s | 5.7 |
| 2024 | 26.0°C | 20.6°C | 15.1°C | 29.3°C | 11.2°C | 72 mm | 83% | 0.1 m/s | 5.6 |
| 2023 🔥 | 26.2°C | 21.4°C | 16.6°C | 30.2°C | 11.9°C | 131 mm | 86% | 0.1 m/s | 5.5 |
| 2022 | 25.0°C | 19.6°C | 14.2°C | 29.9°C | 9.6°C | 65 mm | 80% | 0.1 m/s | 6.2 |
| 2021 | 22.6°C | 17.8°C | 12.9°C | 27.8°C | 8.4°C | 148 mm | 84% | 0.1 m/s | 4.9 |
| 2020 | 24.7°C | 19.4°C | 14.1°C | 30.1°C | 9.3°C | 94 mm | 84% | 0.1 m/s | 5.2 |
| 2019 | 24.6°C | 19.0°C | 13.4°C | 30.5°C | 9.3°C | 52 mm | 82% | 0.1 m/s | 5.9 |
| 2018 | 25.8°C | 20.3°C | 14.8°C | 31.0°C | 9.8°C | 75 mm | 83% | 0.1 m/s | 6.2 |
| 2017 | 23.7°C | 18.1°C | 12.5°C | 27.1°C | 7.6°C | 40 mm | 81% | 0.1 m/s | 6.3 |
| 2016 | 23.8°C | 18.7°C | 13.6°C | 30.5°C | 8.7°C | 65 mm | 83% | 0.1 m/s | 5.4 |
| 2015 | 23.2°C | 17.9°C | 12.6°C | 27.1°C | 8.6°C | 78 mm | 84% | 0.1 m/s | 5.4 |
| 2014 | 25.1°C | 19.9°C | 14.7°C | 28.7°C | 10.9°C | 116 mm | 84% | 0.1 m/s | 5.7 |
| 2013 | 25.0°C | 19.9°C | 14.9°C | 31.0°C | 11.2°C | 118 mm | 83% | 0.1 m/s | 5.6 |
| 2012 | 24.7°C | 19.1°C | 13.5°C | 28.4°C | 10.0°C | 61 mm | 81% | 0.1 m/s | 5.9 |
| 2011 🌧️ | 23.5°C | 18.5°C | 13.4°C | 28.6°C | 9.1°C | 148 mm | 84% | 0.1 m/s | 5.2 |
| 2010 | 24.6°C | 19.7°C | 14.8°C | 29.7°C | 10.1°C | 105 mm | 84% | 0.1 m/s | 5.6 |
| 2009 | 22.6°C | 17.7°C | 12.8°C | 28.4°C | 6.2°C | 134 mm | 85% | 0.1 m/s | 4.9 |
| 2008 | 24.9°C | 19.6°C | 14.2°C | 28.8°C | 11.4°C | 69 mm | 84% | 0.1 m/s | 5.8 |
| 2007 | 23.8°C | 18.7°C | 13.6°C | 30.3°C | 8.0°C | 89 mm | 84% | 0.1 m/s | 5.4 |
| 2006 | 24.8°C | 19.6°C | 14.4°C | 28.2°C | 10.6°C | 111 mm | 84% | 0.1 m/s | 5.3 |
| 2005 | 23.4°C | 17.8°C | 12.3°C | 29.8°C | 8.9°C | 90 mm | 83% | 0.1 m/s | 5.7 |
| 2004 | 23.7°C | 18.4°C | 13.2°C | 28.0°C | 8.6°C | 69 mm | 85% | 0.1 m/s | 5 |
| 2003 | 24.0°C | 19.0°C | 14.0°C | 27.4°C | 11.2°C | 80 mm | 83% | 0.1 m/s | 5.2 |
| 2002 | 23.4°C | 18.1°C | 12.7°C | 29.2°C | 8.0°C | 109 mm | 83% | 0.1 m/s | 5.3 |
| 2001 | 22.6°C | 17.4°C | 12.1°C | 28.1°C | 8.5°C | 48 mm | 82% | 0.1 m/s | 5.6 |
| 2000 | 22.7°C | 17.6°C | 12.5°C | 27.6°C | 9.9°C | 83 mm | 83% | 0.1 m/s | 5.4 |
| 1999 | 24.6°C | 19.4°C | 14.1°C | 30.3°C | 9.6°C | 94 mm | 82% | 0.1 m/s | 5.6 |
| 1998 | 24.2°C | 19.0°C | 13.8°C | 28.3°C | 9.7°C | 53 mm | 82% | 0.1 m/s | 5.7 |
| 1997 | 24.2°C | 18.5°C | 12.7°C | 29.6°C | 7.7°C | 58 mm | 80% | 0.1 m/s | 6 |
| 1996 | 22.1°C | 17.5°C | 12.9°C | 25.7°C | 9.5°C | 127 mm | 85% | 0.1 m/s | 4.8 |
| 1995 | 24.4°C | 19.3°C | 14.2°C | 28.8°C | 10.9°C | 118 mm | 83% | 0.1 m/s | 5.4 |
| 1994 | 25.3°C | 20.2°C | 15.2°C | 29.1°C | 10.8°C | 44 mm | 83% | 0.1 m/s | 5.4 |
| 1993 | 22.7°C | 17.4°C | 12.0°C | 30.1°C | 7.2°C | 95 mm | 84% | 0.1 m/s | 5.1 |
| 1992 ❄️ | 21.4°C | 16.0°C | 10.7°C | 30.8°C | 6.8°C | 105 mm | 83% | 0.1 m/s | 6.2 |
| 1991 | 23.5°C | 18.3°C | 13.1°C | 29.2°C | 7.4°C | 74 mm | 81% | 0.1 m/s | 5.6 |
| 1990 | 23.9°C | 19.0°C | 14.0°C | 29.9°C | 8.7°C | 92 mm | 83% | 0.1 m/s | 5.4 |
| 1989 | 23.1°C | 17.5°C | 11.9°C | 28.4°C | 8.2°C | 98 mm | 82% | 0.1 m/s | 5.7 |
| 1988 | 24.0°C | 18.9°C | 13.7°C | 28.9°C | 7.7°C | 100 mm | 86% | 0.1 m/s | 4.8 |
| 1987 | 23.9°C | 18.5°C | 13.1°C | 28.7°C | 8.6°C | 30 mm | 80% | 0.1 m/s | 5.7 |
| 1986 | 21.2°C | 16.1°C | 11.0°C | 27.3°C | 6.9°C | 125 mm | 84% | 0.1 m/s | 5 |
| 1985 | 23.9°C | 18.4°C | 12.9°C | 27.7°C | 9.6°C | 46 mm | 82% | 0.1 m/s | 6.1 |
| 1984 | 24.2°C | 19.2°C | 14.3°C | 28.9°C | 10.2°C | 109 mm | 84% | 0.1 m/s | 5.2 |
| 1983 | 22.9°C | 17.9°C | 12.8°C | 27.8°C | 9.1°C | 123 mm | 83% | 0.1 m/s | — |
| 1982 | 23.8°C | 18.4°C | 13.0°C | 29.2°C | 6.9°C | 124 mm | 82% | 0.1 m/s | — |
| 1981 | 23.0°C | 17.9°C | 12.8°C | 27.4°C | 9.6°C | 116 mm | 84% | 0.1 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 23.9°C with lows near 13.4°C (mean 18.7°C), based on 45 years of NASA POWER data.
July averages 89 mm of rainfall in Dieppe, about average for rainfall. The wettest on record was 148 mm in 2011.
The hottest July reached 31°C in 2013. The coldest dipped to 6.2°C in 2009.
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 23.6°C to 25.1°C and overnight lows from 13.2°C to 14.6°C over the same span.
July is one of the warmer months of the year in Dieppe and about average for rainfall, so plan for around 23.9°C daytime highs and 13.4°C at night.
Not quite — July is the 12th coolest month in Dieppe, averaging 18.7°C.
For July in Dieppe, pack light layers you can adjust through the day, with typical highs of 23.9°C and lows of 13.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 83% — quite humid.
Average wind speed in July is 0.1 m/s. The windiest July on record averaged 0.1 m/s (1981).
The wettest July on record was 2011 with 148 mm. On average, July sees 89 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 Dieppe 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.
