July is one of the cooler months of the year in Thames, with average highs near 13.7°C and lows around 9.5°C (mean 11.6°C). It is a relatively wet time of year, averaging 126 mm of rainfall and 84% relative humidity across the period.
July is one of the cooler months of the year in Thames. Across 45 years of records, the warmest July in Thames was 1998 — when the month averaged 13.4°C — while the coldest was 1983 at 10.5°C. Typical July days reach 13.7°C with nights near 9.5°C. The long-term trend is warming, about 0.2°C per decade.
July is a relatively wet time of year in Thames, averaging 126 mm of rainfall. The wettest July on record was 2022 with 325 mm, while the driest was 1993 at 8 mm.
Relative humidity in Thames during July averages 84%. The most humid July was 2017 at 88%, and the least humid was 1982 at 80%.
July receives about 2.1 kWh/m²/day of solar energy in Thames. The sunniest July was 1989 at 2.4 kWh/m²/day, and the cloudiest were 1998, 2007 and 2008, among others at 1.8.
Average wind speed in Thames during July is 3.1 m/s. The windiest July was 2000 at 4.1 m/s, while the calmest was 1993 at 2.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 11.3°C | 11.4°C | 11.6°C | 11.6°C | 12.2°C | +0.9°C |
| Avg High | 13.5°C | 13.5°C | 13.8°C | 13.8°C | 14.2°C | +0.7°C |
| Avg Low | 9.2°C | 9.3°C | 9.5°C | 9.4°C | 10.2°C | +1°C |
| Avg Rain | 106 mm | 132 mm | 115 mm | 108 mm | 198 mm | +92 mm |
July temperatures in Thames have risen by about 0.9°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 2.6°C (2015) to a record high of 18.2°C (1998).
Rainfall in July is a relatively wet time of year, averaging 126 mm, with a wettest year of 325 mm.
A quieter season to visit Thames
If your dates are flexible, the more temperate months of February and January tend to be the most comfortable for visiting Thames. That said, July — with days averaging 13.7°C and nights around 9.5°C (mean 11.6°C) and higher rainfall (126 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 14.4°C | 12.4°C | 10.4°C | 17.9°C | 5.8°C | 256 mm | 85% | 2.8 m/s | 2.1 |
| 2024 | 14.2°C | 11.8°C | 9.5°C | 16.0°C | 6.0°C | 145 mm | 87% | 2.6 m/s | 2.1 |
| 2023 | 14.0°C | 12.0°C | 10.1°C | 15.7°C | 6.0°C | 131 mm | 86% | 3.7 m/s | 2.1 |
| 2022 🌧️ | 14.8°C | 13.0°C | 11.2°C | 17.5°C | 7.3°C | 325 mm | 86% | 3.4 m/s | 2 |
| 2021 | 14.1°C | 12.1°C | 10.0°C | 16.4°C | 5.5°C | 147 mm | 85% | 3.1 m/s | 2.2 |
| 2020 | 13.9°C | 11.8°C | 9.7°C | 16.6°C | 5.3°C | 185 mm | 86% | 3.2 m/s | 2 |
| 2019 | 14.8°C | 12.7°C | 10.6°C | 17.3°C | 6.7°C | 147 mm | 87% | 2.7 m/s | 2 |
| 2018 | 14.1°C | 11.9°C | 9.6°C | 16.1°C | 5.8°C | 103 mm | 85% | 2.8 m/s | 2.1 |
| 2017 | 13.3°C | 11.2°C | 9.0°C | 16.7°C | 3.9°C | 149 mm | 88% | 2.8 m/s | 2 |
| 2016 | 14.2°C | 12.2°C | 10.1°C | 16.7°C | 5.7°C | 126 mm | 81% | 3.7 m/s | 2.1 |
| 2015 | 13.2°C | 10.8°C | 8.3°C | 15.4°C | 2.6°C | 128 mm | 85% | 3.1 m/s | 2.2 |
| 2014 | 13.5°C | 11.2°C | 9.0°C | 16.7°C | 3.8°C | 66 mm | 82% | 3.3 m/s | 2.2 |
| 2013 | 13.8°C | 11.6°C | 9.4°C | 16.9°C | 4.1°C | 41 mm | 85% | 2.4 m/s | 2.1 |
| 2012 | 13.9°C | 11.8°C | 9.7°C | 16.0°C | 5.8°C | 160 mm | 82% | 2.7 m/s | 2 |
| 2011 | 13.7°C | 11.7°C | 9.8°C | 15.9°C | 4.2°C | 87 mm | 83% | 3.8 m/s | 2.1 |
| 2010 | 13.6°C | 11.2°C | 8.7°C | 15.4°C | 5.0°C | 68 mm | 84% | 2.8 m/s | 2.2 |
| 2009 | 13.2°C | 10.9°C | 8.6°C | 15.4°C | 4.9°C | 110 mm | 85% | 3.1 m/s | 2.1 |
| 2008 | 13.9°C | 11.7°C | 9.6°C | 16.9°C | 4.3°C | 206 mm | 85% | 3.5 m/s | 1.8 |
| 2007 | 14.2°C | 12.2°C | 10.2°C | 16.3°C | 4.8°C | 159 mm | 87% | 3.3 m/s | 1.8 |
| 2006 | 13.6°C | 11.2°C | 8.8°C | 15.3°C | 3.9°C | 83 mm | 85% | 2.8 m/s | 2.2 |
| 2005 | 14.2°C | 12.2°C | 10.2°C | 16.1°C | 5.0°C | 133 mm | 87% | 3 m/s | 1.9 |
| 2004 | 13.3°C | 11.0°C | 8.7°C | 15.1°C | 4.6°C | 105 mm | 84% | 3.1 m/s | 2.3 |
| 2003 | 13.3°C | 11.1°C | 8.9°C | 15.2°C | 5.0°C | 86 mm | 82% | 2.9 m/s | 2.2 |
| 2002 | 14.0°C | 11.9°C | 9.8°C | 16.2°C | 5.3°C | 118 mm | 84% | 3.6 m/s | 2 |
| 2001 | 13.2°C | 10.9°C | 8.7°C | 17.0°C | 5.1°C | 63 mm | 82% | 3 m/s | 2.1 |
| 2000 | 14.9°C | 13.3°C | 11.7°C | 16.8°C | 7.9°C | 85 mm | 81% | 4.1 m/s | 2 |
| 1999 | 14.1°C | 11.8°C | 9.5°C | 17.0°C | 5.5°C | 83 mm | 85% | 2.9 m/s | 2 |
| 1998 🔥 | 15.3°C | 13.4°C | 11.5°C | 18.2°C | 7.7°C | 242 mm | 86% | 3.3 m/s | 1.8 |
| 1997 | 12.8°C | 10.8°C | 8.7°C | 15.8°C | 6.1°C | 44 mm | 84% | 2.7 m/s | 2.1 |
| 1996 | 13.5°C | 11.5°C | 9.4°C | 16.3°C | 5.5°C | 175 mm | 86% | 3 m/s | 1.9 |
| 1995 | 12.9°C | 10.9°C | 8.9°C | 15.0°C | 3.4°C | 180 mm | 85% | 3.6 m/s | 1.9 |
| 1994 | 13.2°C | 11.0°C | 8.8°C | 15.1°C | 3.5°C | 44 mm | 81% | 3.5 m/s | 2.1 |
| 1993 | 13.2°C | 10.8°C | 8.5°C | 15.2°C | 4.5°C | 8 mm | 82% | 2.3 m/s | 2 |
| 1992 | 13.4°C | 11.4°C | 9.3°C | 15.6°C | 5.4°C | 191 mm | 87% | 3.7 m/s | 2 |
| 1991 | 12.9°C | 11.1°C | 9.2°C | 15.2°C | 5.6°C | 167 mm | 83% | 2.9 m/s | 2.1 |
| 1990 | 13.6°C | 11.6°C | 9.5°C | 15.8°C | 5.9°C | 185 mm | 87% | 3.1 m/s | 2 |
| 1989 | 13.3°C | 11.1°C | 8.9°C | 15.8°C | 4.6°C | 88 mm | 81% | 2.7 m/s | 2.4 |
| 1988 | 13.8°C | 12.1°C | 10.3°C | 16.1°C | 5.4°C | 165 mm | 84% | 3.7 m/s | 2 |
| 1987 | 13.2°C | 11.0°C | 8.9°C | 14.7°C | 5.2°C | 102 mm | 84% | 3.2 m/s | 2.1 |
| 1986 | 12.9°C | 10.7°C | 8.4°C | 15.2°C | 5.0°C | 143 mm | 82% | 3.3 m/s | 2.3 |
| 1985 | 14.0°C | 12.2°C | 10.4°C | 16.5°C | 7.7°C | 145 mm | 87% | 2.9 m/s | 2 |
| 1984 | 14.3°C | 12.0°C | 9.8°C | 17.0°C | 5.0°C | 100 mm | 87% | 2.7 m/s | 1.8 |
| 1983 ❄️ | 13.1°C | 10.5°C | 7.9°C | 15.8°C | 4.0°C | 34 mm | 82% | 2.5 m/s | — |
| 1982 | 12.9°C | 11.0°C | 9.0°C | 15.8°C | 4.0°C | 75 mm | 80% | 3.1 m/s | — |
| 1981 | 13.6°C | 11.4°C | 9.2°C | 16.6°C | 4.7°C | 105 mm | 85% | 3.1 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 13.7°C with lows near 9.5°C (mean 11.6°C), based on 45 years of NASA POWER data.
July averages 126 mm of rainfall in Thames, a relatively wet time of year. The wettest on record was 325 mm in 2022.
The hottest July reached 18.2°C in 1998. The coldest dipped to 2.6°C in 2015.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 0.9°C. Daytime highs moved from 13.6°C to 14.3°C and overnight lows from 9.3°C to 10.2°C over the same span.
July is one of the cooler months of the year in Thames and a relatively wet time of year, so plan for around 13.7°C daytime highs and 9.5°C at night.
Yes — July is the coldest month of the year in Thames, averaging 11.6°C.
For July in Thames, pack light layers you can adjust through the day, with typical highs of 13.7°C and lows of 9.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 84% — quite humid.
Average wind speed in July is 3.1 m/s. The windiest July on record averaged 4.1 m/s (2000).
The wettest July on record was 2022 with 325 mm. On average, July sees 126 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 Thames 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.
