May is one of the warmer months of the year in Dieppe, with average highs near 15.6°C and lows around 4.1°C (mean 9.9°C). It is about average for rainfall, averaging 88 mm of rainfall and 81% relative humidity across the period.
May is one of the warmer months of the year in Dieppe. Across 45 years of records, the warmest May in Dieppe was 1989 — when the month averaged 12.9°C — while the coldest was 2019 at 7.4°C. Typical May days reach 15.6°C with nights near 4.1°C. The long-term May temperature trend is broadly flat.
May is about average for rainfall in Dieppe, averaging 88 mm of rainfall. The wettest May on record was 1990 with 208 mm, while the driest was 1992 at 35 mm.
Relative humidity in Dieppe during May averages 81%. The most humid May was 2011 at 87%, and the least humid was 1987 at 76%.
May receives about 5.1 kWh/m²/day of solar energy in Dieppe. The sunniest May was 2018 at 6.4 kWh/m²/day, and the cloudiest was 2011 at 4.
Average wind speed in Dieppe during May is 0.1 m/s. The windiest Mays 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 | 10.1°C | 9.6°C | 9.5°C | 10.0°C | 10.2°C | +0.1°C |
| Avg High | 15.9°C | 15.4°C | 15.2°C | 15.7°C | 16.2°C | +0.3°C |
| Avg Low | 4.3°C | 3.8°C | 3.9°C | 4.3°C | 4.1°C | -0.2°C |
| Avg Rain | 93 mm | 95 mm | 96 mm | 83 mm | 65 mm | -27 mm |
May temperatures in Dieppe have risen by about 0.7°C between 1981–1985 and 2021–2025.
May has ranged from a record low of -4.4°C (1993) to a record high of 30.5°C (1992).
Rainfall in May is about average for rainfall, averaging 88 mm, with a wettest year of 208 mm.
A good time to visit Dieppe
May is a good time to visit Dieppe, with days averaging 15.6°C and nights around 4.1°C (mean 9.9°C, warmer than Dieppe's yearly average) and higher rainfall. July and August are marginally more temperate, but May still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 16.0°C | 10.5°C | 4.9°C | 25.7°C | -1.6°C | 91 mm | 82% | 0.1 m/s | 4.7 |
| 2024 | 17.2°C | 11.2°C | 5.1°C | 24.4°C | -1.2°C | 48 mm | 82% | 0.1 m/s | 5.3 |
| 2023 | 15.6°C | 9.5°C | 3.4°C | 28.7°C | -0.3°C | 47 mm | 77% | 0.1 m/s | 5.5 |
| 2022 | 17.5°C | 10.8°C | 4.1°C | 26.0°C | -3.5°C | 55 mm | 77% | 0.1 m/s | 6 |
| 2021 | 16.1°C | 10.0°C | 3.9°C | 23.8°C | 0.0°C | 83 mm | 78% | 0.1 m/s | 5.5 |
| 2020 | 15.0°C | 9.1°C | 3.1°C | 23.9°C | -2.2°C | 67 mm | 78% | 0.1 m/s | 5.7 |
| 2019 ❄️ | 12.7°C | 7.4°C | 2.0°C | 21.3°C | -3.2°C | 91 mm | 82% | 0.1 m/s | 5 |
| 2018 | 16.8°C | 10.0°C | 3.1°C | 25.6°C | -4.0°C | 80 mm | 78% | 0.1 m/s | 6.4 |
| 2017 | 15.2°C | 9.8°C | 4.4°C | 27.4°C | -1.2°C | 125 mm | 84% | 0.1 m/s | 4.6 |
| 2016 | 16.1°C | 10.4°C | 4.6°C | 25.6°C | -3.1°C | 66 mm | 82% | 0.1 m/s | 4.7 |
| 2015 | 17.1°C | 10.9°C | 4.7°C | 25.8°C | -2.7°C | 69 mm | 80% | 0.1 m/s | 5.6 |
| 2014 | 14.3°C | 8.7°C | 3.2°C | 21.5°C | -2.5°C | 61 mm | 83% | 0.1 m/s | 5 |
| 2013 | 16.4°C | 10.7°C | 5.1°C | 27.2°C | -3.7°C | 90 mm | 83% | 0.1 m/s | 5.1 |
| 2012 | 17.0°C | 11.3°C | 5.6°C | 23.7°C | -1.4°C | 71 mm | 82% | 0.1 m/s | 5.1 |
| 2011 | 14.6°C | 10.0°C | 5.5°C | 24.0°C | -0.6°C | 134 mm | 87% | 0.1 m/s | 4 |
| 2010 | 16.5°C | 10.8°C | 5.2°C | 26.8°C | 0.1°C | 46 mm | 80% | 0.1 m/s | 5.5 |
| 2009 | 16.1°C | 10.5°C | 5.0°C | 24.2°C | 1.3°C | 85 mm | 82% | 0.1 m/s | 5.2 |
| 2008 | 14.6°C | 9.2°C | 3.8°C | 21.2°C | -1.8°C | 78 mm | 82% | 0.1 m/s | 4.9 |
| 2007 | 14.7°C | 9.0°C | 3.4°C | 28.2°C | -2.0°C | 87 mm | 81% | 0.1 m/s | 5 |
| 2006 | 17.5°C | 11.6°C | 5.6°C | 23.7°C | -0.1°C | 75 mm | 82% | 0.1 m/s | 5 |
| 2005 | 12.6°C | 8.1°C | 3.6°C | 21.4°C | -2.1°C | 183 mm | 84% | 0.1 m/s | 4.2 |
| 2004 | 15.9°C | 9.6°C | 3.4°C | 23.3°C | -2.8°C | 46 mm | 78% | 0.1 m/s | 4.9 |
| 2003 | 14.5°C | 8.9°C | 3.4°C | 28.2°C | -4.1°C | 87 mm | 83% | 0.1 m/s | 4.6 |
| 2002 | 15.0°C | 9.2°C | 3.4°C | 23.0°C | -2.8°C | 84 mm | 78% | 0.1 m/s | 5.7 |
| 2001 | 16.8°C | 10.6°C | 4.5°C | 24.9°C | -2.9°C | 129 mm | 82% | 0.1 m/s | 5.4 |
| 2000 | 14.0°C | 8.6°C | 3.1°C | 20.7°C | -1.9°C | 102 mm | 81% | 0.1 m/s | 5 |
| 1999 | 19.2°C | 12.6°C | 5.9°C | 25.6°C | -0.8°C | 39 mm | 78% | 0.1 m/s | 6.1 |
| 1998 | 18.7°C | 12.3°C | 5.9°C | 25.0°C | 0.0°C | 72 mm | 81% | 0.1 m/s | 5.4 |
| 1997 | 13.7°C | 8.5°C | 3.4°C | 21.2°C | -1.1°C | 76 mm | 81% | 0.1 m/s | 4.8 |
| 1996 | 13.9°C | 8.4°C | 2.9°C | 22.4°C | -3.8°C | 103 mm | 80% | 0.1 m/s | 4.6 |
| 1995 | 14.6°C | 8.9°C | 3.1°C | 20.0°C | -1.4°C | 64 mm | 80% | 0.1 m/s | 4.9 |
| 1994 | 13.4°C | 8.5°C | 3.6°C | 22.3°C | -0.2°C | 152 mm | 84% | 0.1 m/s | 4.6 |
| 1993 | 15.2°C | 9.4°C | 3.6°C | 20.9°C | -4.4°C | 91 mm | 83% | 0.1 m/s | 4.4 |
| 1992 | 16.0°C | 9.2°C | 2.4°C | 30.5°C | -3.4°C | 35 mm | 77% | 0.1 m/s | 5.9 |
| 1991 | 16.9°C | 10.6°C | 4.2°C | 26.1°C | -4.0°C | 106 mm | 79% | 0.1 m/s | 5.4 |
| 1990 🌧️ | 12.5°C | 7.6°C | 2.8°C | 23.3°C | -1.7°C | 208 mm | 84% | 0.1 m/s | 4.3 |
| 1989 🔥 | 18.7°C | 12.9°C | 7.1°C | 24.8°C | -0.7°C | 80 mm | 84% | 0.1 m/s | 4.4 |
| 1988 | 16.3°C | 10.3°C | 4.4°C | 23.1°C | -1.2°C | 87 mm | 81% | 0.1 m/s | 4.9 |
| 1987 | 16.4°C | 9.9°C | 3.4°C | 24.6°C | -3.8°C | 53 mm | 76% | 0.1 m/s | 5.7 |
| 1986 | 15.7°C | 9.6°C | 3.4°C | 26.5°C | -2.9°C | 72 mm | 79% | 0.1 m/s | 5.8 |
| 1985 | 14.6°C | 8.9°C | 3.1°C | 22.4°C | -3.0°C | 144 mm | 81% | 0.1 m/s | 5.8 |
| 1984 | 14.8°C | 9.9°C | 4.9°C | 21.2°C | 1.0°C | 109 mm | 84% | 0.1 m/s | 4.2 |
| 1983 | 14.7°C | 9.7°C | 4.7°C | 21.6°C | -3.4°C | 136 mm | 84% | 0.1 m/s | — |
| 1982 | 14.8°C | 8.8°C | 2.8°C | 24.8°C | -2.0°C | 47 mm | 80% | 0.1 m/s | — |
| 1981 | 16.8°C | 11.0°C | 5.2°C | 23.7°C | -3.0°C | 105 mm | 82% | 0.1 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 15.6°C with lows near 4.1°C (mean 9.9°C), based on 45 years of NASA POWER data.
May averages 88 mm of rainfall in Dieppe, about average for rainfall. The wettest on record was 208 mm in 1990.
The hottest May reached 30.5°C in 1992. The coldest dipped to -4.4°C in 1993.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 0.7°C. Daytime highs moved from 15.1°C to 16.5°C and overnight lows from 4.1°C to 4.3°C over the same span.
May is one of the warmer months of the year in Dieppe and about average for rainfall, so plan for around 15.6°C daytime highs and 4.1°C at night.
Not quite — May is the 8th coolest month in Dieppe, averaging 9.9°C.
For May in Dieppe, pack warm layers and a jacket for chilly mornings, with typical highs of 15.6°C and lows of 4.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 81% — quite humid.
Average wind speed in May is 0.1 m/s. The windiest May on record averaged 0.1 m/s (1981).
The wettest May on record was 1990 with 208 mm. On average, May sees 88 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 May, 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 May specifically, along with year-by-year records and how the month has changed over the decades.
