July is one of the warmer months of the year in Lewes, with average highs near 20.9°C and lows around 13.1°C (mean 17°C). It is one of the drier months, averaging 52 mm of rainfall and 80% relative humidity across the period.
July is one of the warmer months of the year in Lewes. Across 45 years of records, the warmest July in Lewes was 2018 — when the month averaged 19.6°C — while the coldest was 1988 at 15°C. Typical July days reach 20.9°C with nights near 13.1°C. The long-term trend is warming, about 0.3°C per decade.
July is one of the drier months in Lewes, averaging 52 mm of rainfall. The wettest July on record was 2007 with 103 mm, while the driest was 2022 at 5 mm.
Relative humidity in Lewes during July averages 80%. The most humid Julys were 1981 and 1988 at 83%, and the least humid was 2022 at 73%.
July receives about 5.7 kWh/m²/day of solar energy in Lewes. The sunniest July was 2006 at 6.6 kWh/m²/day, and the cloudiest was 1993 at 5.
Average wind speed in Lewes during July is 3.3 m/s. The windiest July was 1988 at 4.6 m/s, while the calmest were 1983 and 1994 at 2.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 16.6°C | 16.8°C | 16.8°C | 17.2°C | 17.7°C | +1.1°C |
| Avg High | 20.5°C | 20.8°C | 20.5°C | 21.1°C | 21.6°C | +1.1°C |
| Avg Low | 12.6°C | 12.8°C | 13.1°C | 13.4°C | 13.8°C | +1.2°C |
| Avg Rain | 47 mm | 41 mm | 64 mm | 54 mm | 54 mm | +6 mm |
July temperatures in Lewes have risen by about 1.2°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 6.7°C (1984) to a record high of 30.4°C (2022).
Rainfall in July is one of the drier months, averaging 52 mm, with a wettest year of 103 mm.
One of the best times to visit Lewes
July is one of the best times to visit Lewes. Expect days averaging 20.9°C and nights around 13.1°C (mean 17°C) — warmer than Lewes's yearly average — with moderate rainfall (52 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 | 23.1°C | 18.8°C | 14.5°C | 27.8°C | 10.5°C | 68 mm | 75% | 3 m/s | 5.7 |
| 2024 | 20.7°C | 17.1°C | 13.5°C | 26.9°C | 10.3°C | 65 mm | 82% | 3.3 m/s | 5.3 |
| 2023 | 20.5°C | 17.0°C | 13.6°C | 24.3°C | 11.0°C | 75 mm | 80% | 4.2 m/s | 5.5 |
| 2022 | 23.6°C | 19.0°C | 14.4°C | 30.4°C | 10.4°C | 5 mm | 73% | 2.8 m/s | 6.5 |
| 2021 | 21.2°C | 17.6°C | 13.9°C | 27.6°C | 11.4°C | 72 mm | 83% | 3.1 m/s | 5.6 |
| 2020 | 20.6°C | 16.7°C | 12.8°C | 26.9°C | 9.4°C | 38 mm | 78% | 3.7 m/s | 6 |
| 2019 | 21.9°C | 17.9°C | 13.8°C | 28.6°C | 10.4°C | 62 mm | 77% | 3.1 m/s | 6 |
| 2018 🔥 | 24.2°C | 19.6°C | 15.0°C | 28.7°C | 12.0°C | 34 mm | 73% | 2.7 m/s | 6.3 |
| 2017 | 21.1°C | 17.5°C | 14.0°C | 24.5°C | 11.3°C | 73 mm | 78% | 3.8 m/s | 5.5 |
| 2016 | 20.5°C | 16.9°C | 13.3°C | 26.3°C | 10.0°C | 25 mm | 82% | 3.5 m/s | 6 |
| 2015 | 20.2°C | 16.5°C | 12.7°C | 26.0°C | 9.4°C | 69 mm | 80% | 4 m/s | 5.4 |
| 2014 | 21.8°C | 17.8°C | 13.8°C | 25.4°C | 10.1°C | 52 mm | 80% | 3.1 m/s | 5.6 |
| 2013 | 21.9°C | 17.6°C | 13.3°C | 25.7°C | 9.5°C | 45 mm | 81% | 3 m/s | 6 |
| 2012 | 19.0°C | 15.7°C | 12.4°C | 26.2°C | 9.7°C | 102 mm | 83% | 3.5 m/s | 5.5 |
| 2011 | 19.4°C | 15.5°C | 11.6°C | 22.7°C | 9.3°C | 54 mm | 79% | 3.1 m/s | 5.8 |
| 2010 | 21.1°C | 17.4°C | 13.6°C | 24.6°C | 11.1°C | 25 mm | 79% | 3.2 m/s | 6 |
| 2009 | 20.0°C | 16.5°C | 13.1°C | 25.5°C | 10.6°C | 74 mm | 80% | 4.2 m/s | 6.3 |
| 2008 | 20.3°C | 16.6°C | 12.9°C | 24.8°C | 8.9°C | 63 mm | 79% | 3.8 m/s | 5.8 |
| 2007 🌧️ | 19.2°C | 15.9°C | 12.7°C | 23.6°C | 9.3°C | 103 mm | 82% | 4.3 m/s | 5.7 |
| 2006 | 23.9°C | 19.4°C | 14.9°C | 29.1°C | 11.2°C | 30 mm | 76% | 3.1 m/s | 6.6 |
| 2005 | 20.8°C | 16.9°C | 13.0°C | 25.0°C | 10.3°C | 65 mm | 80% | 3.3 m/s | 5.2 |
| 2004 | 19.9°C | 16.1°C | 12.4°C | 24.3°C | 9.8°C | 51 mm | 81% | 3.2 m/s | 5.5 |
| 2003 | 20.8°C | 17.3°C | 13.8°C | 26.7°C | 11.9°C | 54 mm | 82% | 3 m/s | 6 |
| 2002 | 19.8°C | 16.2°C | 12.6°C | 26.5°C | 10.1°C | 77 mm | 83% | 3.2 m/s | 5.2 |
| 2001 | 20.9°C | 17.1°C | 13.3°C | 25.7°C | 9.8°C | 59 mm | 81% | 3 m/s | 5.6 |
| 2000 | 19.2°C | 15.5°C | 11.8°C | 22.8°C | 8.1°C | 64 mm | 83% | 2.9 m/s | 5.1 |
| 1999 | 21.7°C | 17.6°C | 13.4°C | 26.2°C | 10.4°C | 15 mm | 79% | 3.3 m/s | 6.3 |
| 1998 | 19.0°C | 15.7°C | 12.4°C | 21.8°C | 9.8°C | 46 mm | 82% | 3.8 m/s | 5.3 |
| 1997 | 20.8°C | 16.7°C | 12.7°C | 23.9°C | 9.2°C | 26 mm | 79% | 2.9 m/s | 5.7 |
| 1996 | 20.6°C | 16.3°C | 12.0°C | 24.6°C | 8.8°C | 31 mm | 78% | 3.2 m/s | 5.9 |
| 1995 | 22.1°C | 18.0°C | 14.0°C | 27.1°C | 11.1°C | 28 mm | 81% | 3 m/s | 5.7 |
| 1994 | 22.0°C | 17.7°C | 13.5°C | 26.7°C | 10.6°C | 34 mm | 82% | 2.6 m/s | 6 |
| 1993 | 19.4°C | 15.7°C | 11.9°C | 23.6°C | 7.7°C | 63 mm | 81% | 3.8 m/s | 5 |
| 1992 | 20.7°C | 16.8°C | 13.0°C | 25.4°C | 10.2°C | 75 mm | 80% | 3.3 m/s | 5.3 |
| 1991 | 20.4°C | 16.6°C | 12.9°C | 24.1°C | 9.6°C | 78 mm | 83% | 3.4 m/s | 5.2 |
| 1990 | 21.6°C | 17.0°C | 12.4°C | 26.9°C | 8.5°C | 17 mm | 74% | 3.8 m/s | 6.1 |
| 1989 | 22.9°C | 18.2°C | 13.6°C | 28.4°C | 10.3°C | 32 mm | 76% | 2.9 m/s | 5.8 |
| 1988 ❄️ | 18.2°C | 15.0°C | 11.8°C | 20.7°C | 9.4°C | 86 mm | 83% | 4.6 m/s | 5.4 |
| 1987 | 19.8°C | 16.1°C | 12.3°C | 26.3°C | 8.9°C | 83 mm | 81% | 3 m/s | 5.1 |
| 1986 | 20.2°C | 16.1°C | 12.1°C | 24.9°C | 8.6°C | 50 mm | 79% | 3 m/s | 5.3 |
| 1985 | 20.1°C | 16.2°C | 12.3°C | 23.7°C | 10.0°C | 46 mm | 81% | 3.6 m/s | 5.7 |
| 1984 | 20.4°C | 16.2°C | 11.9°C | 24.5°C | 6.7°C | 35 mm | 79% | 2.7 m/s | 5.1 |
| 1983 | 23.0°C | 18.8°C | 14.5°C | 26.9°C | 8.6°C | 30 mm | 82% | 2.6 m/s | — |
| 1982 | 20.6°C | 16.7°C | 12.9°C | 23.9°C | 9.0°C | 30 mm | 81% | 3.3 m/s | — |
| 1981 | 19.4°C | 15.8°C | 12.2°C | 24.3°C | 9.4°C | 35 mm | 83% | 3.3 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 20.9°C with lows near 13.1°C (mean 17°C), based on 45 years of NASA POWER data.
July averages 52 mm of rainfall in Lewes, one of the drier months. The wettest on record was 103 mm in 2007.
The hottest July reached 30.4°C in 2022. The coldest dipped to 6.7°C in 1984.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 1.2°C. Daytime highs moved from 20.7°C to 21.8°C and overnight lows from 12.8°C to 14°C over the same span.
July is one of the warmer months of the year in Lewes and one of the drier months, so plan for around 20.9°C daytime highs and 13.1°C at night.
Not quite — July is the 11th coolest month in Lewes, averaging 17°C.
For July in Lewes, pack light layers you can adjust through the day, with typical highs of 20.9°C and lows of 13.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 80% — quite humid.
Average wind speed in July is 3.3 m/s. The windiest July on record averaged 4.6 m/s (1988).
The wettest July on record was 2007 with 103 mm. On average, July sees 52 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 Lewes 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.
