July is one of the warmer months of the year in St. Thomas, with average highs near 27.9°C and lows around 16.4°C (mean 22.2°C). It is a relatively wet time of year, averaging 69 mm of rainfall and 67% relative humidity across the period.
July is one of the warmer months of the year in St. Thomas. Across 45 years of records, the warmest July in St. Thomas was 2020 — when the month averaged 25.3°C — while the coldest was 2000 at 18.7°C. Typical July days reach 27.9°C with nights near 16.4°C. The long-term trend is warming, about 0.5°C per decade.
July is a relatively wet time of year in St. Thomas, averaging 69 mm of rainfall. The wettest July on record was 1992 with 173 mm, while the driest was 2001 at 25 mm.
Relative humidity in St. Thomas during July averages 67%. The most humid July was 2000 at 79%, and the least humid was 2007 at 58%.
July receives about 6.2 kWh/m²/day of solar energy in St. Thomas. The sunniest Julys were 1985, 2001 and 2002 at 6.7 kWh/m²/day, and the cloudiest was 1984 at 5.3.
Average wind speed in St. Thomas during July is 2.7 m/s. The windiest July was 2006 at 3.1 m/s, while the calmest were 1989, 2015 and 2024, among others at 2.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 21.7°C | 21.5°C | 21.7°C | 22.6°C | 23.7°C | +2°C |
| Avg High | 27.6°C | 27.3°C | 27.3°C | 28.3°C | 29.7°C | +2.1°C |
| Avg Low | 15.9°C | 15.8°C | 16.0°C | 17.0°C | 17.7°C | +1.8°C |
| Avg Rain | 67 mm | 73 mm | 70 mm | 78 mm | 52 mm | -14 mm |
July temperatures in St. Thomas have risen by about 2.5°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 7.2°C (2001) to a record high of 37.2°C (1988).
Rainfall in July is a relatively wet time of year, averaging 69 mm, with a wettest year of 173 mm.
One of the best times to visit St. Thomas
July is one of the best times to visit St. Thomas. Expect days averaging 27.9°C and nights around 16.4°C (mean 22.2°C) — warmer than St. Thomas's yearly average — with moderate rainfall (69 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 | 31.0°C | 24.6°C | 18.2°C | 35.9°C | 12.5°C | 37 mm | 60% | 2.6 m/s | 6.3 |
| 2024 | 29.5°C | 23.5°C | 17.5°C | 32.7°C | 10.2°C | 61 mm | 63% | 2.3 m/s | 6.1 |
| 2023 | 28.7°C | 23.0°C | 17.4°C | 33.5°C | 14.8°C | 78 mm | 65% | 2.4 m/s | 5.8 |
| 2022 | 29.4°C | 23.3°C | 17.2°C | 32.8°C | 12.7°C | 47 mm | 59% | 2.8 m/s | 6.3 |
| 2021 | 28.2°C | 22.5°C | 16.8°C | 33.3°C | 11.2°C | 48 mm | 66% | 3 m/s | 5.7 |
| 2020 🔥 | 31.2°C | 25.3°C | 19.3°C | 35.6°C | 14.5°C | 42 mm | 62% | 2.5 m/s | 6.6 |
| 2019 | 28.8°C | 23.3°C | 17.7°C | 31.9°C | 12.9°C | 99 mm | 71% | 2.6 m/s | 6.5 |
| 2018 | 28.5°C | 22.9°C | 17.2°C | 33.7°C | 10.8°C | 76 mm | 67% | 2.5 m/s | 6.4 |
| 2017 | 26.6°C | 21.4°C | 16.3°C | 30.4°C | 12.2°C | 94 mm | 75% | 2.5 m/s | 6.1 |
| 2016 | 29.6°C | 23.7°C | 17.8°C | 34.5°C | 10.9°C | 46 mm | 63% | 2.9 m/s | 6.5 |
| 2015 | 26.4°C | 20.7°C | 14.9°C | 32.5°C | 9.1°C | 72 mm | 71% | 2.3 m/s | 6.5 |
| 2014 | 24.8°C | 19.5°C | 14.2°C | 30.2°C | 9.1°C | 112 mm | 72% | 2.8 m/s | 6.2 |
| 2013 | 26.6°C | 21.7°C | 16.8°C | 33.7°C | 10.4°C | 105 mm | 76% | 2.5 m/s | 5.8 |
| 2012 | 30.3°C | 24.2°C | 18.2°C | 35.2°C | 14.0°C | 78 mm | 62% | 2.5 m/s | 6.4 |
| 2011 | 31.3°C | 25.0°C | 18.6°C | 35.8°C | 12.6°C | 32 mm | 61% | 2.7 m/s | 6.6 |
| 2010 | 29.8°C | 23.8°C | 17.8°C | 35.4°C | 9.1°C | 66 mm | 64% | 2.7 m/s | 6.5 |
| 2009 | 25.1°C | 19.7°C | 14.3°C | 27.8°C | 10.5°C | 57 mm | 68% | 2.7 m/s | 5.9 |
| 2008 | 28.1°C | 22.5°C | 16.9°C | 31.5°C | 10.4°C | 75 mm | 67% | 2.9 m/s | 6.6 |
| 2007 | 28.1°C | 22.1°C | 16.1°C | 34.5°C | 9.4°C | 30 mm | 58% | 2.7 m/s | 6.2 |
| 2006 | 29.7°C | 23.9°C | 18.0°C | 35.5°C | 11.8°C | 90 mm | 66% | 3.1 m/s | 6 |
| 2005 | 29.9°C | 23.8°C | 17.6°C | 35.4°C | 11.1°C | 88 mm | 62% | 2.4 m/s | 6.4 |
| 2004 | 25.9°C | 20.6°C | 15.3°C | 31.5°C | 11.2°C | 92 mm | 72% | 2.7 m/s | 5.6 |
| 2003 | 26.9°C | 21.2°C | 15.5°C | 31.7°C | 10.9°C | 66 mm | 68% | 2.9 m/s | 5.8 |
| 2002 | 29.5°C | 23.3°C | 17.0°C | 32.5°C | 11.9°C | 54 mm | 64% | 2.6 m/s | 6.7 |
| 2001 | 26.8°C | 20.9°C | 14.9°C | 33.1°C | 7.2°C | 25 mm | 64% | 2.9 m/s | 6.7 |
| 2000 ❄️ | 23.4°C | 18.7°C | 13.9°C | 26.9°C | 9.6°C | 120 mm | 79% | 2.4 m/s | 5.8 |
| 1999 | 29.6°C | 23.6°C | 17.6°C | 33.7°C | 10.8°C | 52 mm | 65% | 3 m/s | 6.4 |
| 1998 | 27.9°C | 21.9°C | 16.0°C | 32.9°C | 12.1°C | 75 mm | 63% | 2.8 m/s | 6.4 |
| 1997 | 27.5°C | 21.4°C | 15.3°C | 32.6°C | 10.2°C | 54 mm | 66% | 2.9 m/s | 6.2 |
| 1996 | 25.9°C | 19.9°C | 14.0°C | 29.6°C | 9.8°C | 62 mm | 66% | 2.9 m/s | 6.4 |
| 1995 | 28.0°C | 22.4°C | 16.8°C | 35.6°C | 10.3°C | 34 mm | 68% | 2.9 m/s | 5.9 |
| 1994 | 26.8°C | 21.5°C | 16.3°C | 30.5°C | 11.6°C | 67 mm | 71% | 2.6 m/s | 6.1 |
| 1993 | 28.2°C | 22.5°C | 16.9°C | 31.7°C | 12.2°C | 60 mm | 68% | 3 m/s | 6 |
| 1992 🌧️ | 24.2°C | 18.8°C | 13.5°C | 29.6°C | 8.3°C | 173 mm | 74% | 2.9 m/s | 5.8 |
| 1991 | 28.1°C | 22.1°C | 16.2°C | 33.3°C | 10.8°C | 68 mm | 64% | 2.7 m/s | 6.5 |
| 1990 | 26.5°C | 20.9°C | 15.3°C | 33.5°C | 10.7°C | 89 mm | 67% | 3 m/s | 5.8 |
| 1989 | 28.6°C | 22.7°C | 16.9°C | 33.3°C | 11.0°C | 34 mm | 63% | 2.3 m/s | 6 |
| 1988 | 30.4°C | 23.9°C | 17.4°C | 37.2°C | 10.2°C | 103 mm | 58% | 2.3 m/s | 6.2 |
| 1987 | 29.1°C | 23.2°C | 17.3°C | 33.7°C | 10.9°C | 46 mm | 67% | 2.8 m/s | 6.4 |
| 1986 | 27.0°C | 21.3°C | 15.6°C | 32.4°C | 9.5°C | 82 mm | 71% | 2.9 m/s | 6.6 |
| 1985 | 25.7°C | 20.1°C | 14.6°C | 29.8°C | 8.6°C | 59 mm | 68% | 2.9 m/s | 6.7 |
| 1984 | 25.1°C | 19.5°C | 13.9°C | 28.7°C | 8.5°C | 65 mm | 72% | 2.6 m/s | 5.3 |
| 1983 | 27.8°C | 22.1°C | 16.3°C | 32.0°C | 7.7°C | 79 mm | 71% | 2.8 m/s | — |
| 1982 | 26.5°C | 20.8°C | 15.1°C | 30.4°C | 8.1°C | 57 mm | 71% | 2.4 m/s | — |
| 1981 | 28.4°C | 22.1°C | 15.8°C | 32.8°C | 10.3°C | 74 mm | 63% | 2.7 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 27.9°C with lows near 16.4°C (mean 22.2°C), based on 45 years of NASA POWER data.
July averages 69 mm of rainfall in St. Thomas, a relatively wet time of year. The wettest on record was 173 mm in 1992.
The hottest July reached 37.2°C in 1988. The coldest dipped to 7.2°C in 2001.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 2.5°C. Daytime highs moved from 26.7°C to 29.4°C and overnight lows from 15.1°C to 17.4°C over the same span.
July is one of the warmer months of the year in St. Thomas and a relatively wet time of year, so plan for around 27.9°C daytime highs and 16.4°C at night.
Not quite — July is the 12th coolest month in St. Thomas, averaging 22.2°C.
For July in St. Thomas, pack light layers you can adjust through the day, with typical highs of 27.9°C and lows of 16.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 67% — moderately humid.
Average wind speed in July is 2.7 m/s. The windiest July on record averaged 3.1 m/s (2006).
The wettest July on record was 1992 with 173 mm. On average, July sees 69 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 St. Thomas 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.
