April is one of the cooler months of the year in St. Thomas, with average highs near 12.1°C and lows around 1.1°C (mean 6.6°C). It is about average for rainfall, averaging 57 mm of rainfall and 76% relative humidity across the period.
April is one of the cooler months of the year in St. Thomas. Across 45 years of records, the warmest April in St. Thomas was 2010 — when the month averaged 10°C — while the coldest was 2018 at 2.9°C. Typical April days reach 12.1°C with nights near 1.1°C. The long-term trend is warming, about 0.2°C per decade.
April is about average for rainfall in St. Thomas, averaging 57 mm of rainfall. The wettest April on record was 2000 with 119 mm, while the driest was 1997 at 19 mm.
Relative humidity in St. Thomas during April averages 76%. The most humid Aprils were 1985 and 2002 at 83%, and the least humid was 2010 at 65%.
April receives about 4.7 kWh/m²/day of solar energy in St. Thomas. The sunniest Aprils were 1985 and 2008 at 5.4 kWh/m²/day, and the cloudiest was 2011 at 3.6.
Average wind speed in St. Thomas during April is 4 m/s. The windiest April was 1981 at 4.8 m/s, while the calmest was 1989 at 3.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 6.4°C | 6.3°C | 6.9°C | 6.3°C | 7.5°C | +1.1°C |
| Avg High | 11.8°C | 11.6°C | 12.6°C | 11.9°C | 13.2°C | +1.4°C |
| Avg Low | 1.0°C | 0.9°C | 1.3°C | 0.8°C | 1.9°C | +0.9°C |
| Avg Rain | 63 mm | 55 mm | 59 mm | 62 mm | 36 mm | -26 mm |
April temperatures in St. Thomas have risen by about 1.9°C between 1981–1985 and 2021–2025.
April has ranged from a record low of -13.2°C (2003) to a record high of 27.8°C (2023).
Rainfall in April is about average for rainfall, averaging 57 mm, with a wettest year of 119 mm.
A good time to visit St. Thomas
April is a good time to visit St. Thomas, with days averaging 12.1°C and nights around 1.1°C (mean 6.6°C, cooler than St. Thomas's yearly average) and moderate rainfall. July and August are marginally more temperate, but April still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 14.0°C | 7.8°C | 1.6°C | 25.2°C | -4.8°C | 40 mm | 67% | 4.3 m/s | 4.7 |
| 2024 | 15.1°C | 9.5°C | 4.0°C | 25.3°C | -3.0°C | 51 mm | 71% | 4.2 m/s | 4.8 |
| 2023 | 14.6°C | 8.5°C | 2.4°C | 27.8°C | -5.4°C | 40 mm | 69% | 3.6 m/s | 4.6 |
| 2022 | 11.5°C | 6.1°C | 0.7°C | 25.7°C | -4.1°C | 35 mm | 73% | 3.8 m/s | 4.6 |
| 2021 | 13.5°C | 8.0°C | 2.6°C | 24.8°C | -4.9°C | 29 mm | 68% | 3.7 m/s | 4.7 |
| 2020 | 10.5°C | 5.2°C | -0.1°C | 16.3°C | -4.3°C | 23 mm | 73% | 4 m/s | 4.7 |
| 2019 | 10.6°C | 5.9°C | 1.2°C | 18.5°C | -6.7°C | 77 mm | 81% | 4.1 m/s | 4.1 |
| 2018 ❄️ | 7.6°C | 2.9°C | -1.8°C | 19.5°C | -6.3°C | 65 mm | 77% | 4 m/s | 4.5 |
| 2017 | 14.8°C | 9.1°C | 3.4°C | 23.0°C | -2.8°C | 89 mm | 79% | 4.3 m/s | 4.6 |
| 2016 | 9.9°C | 4.5°C | -0.9°C | 22.8°C | -9.8°C | 54 mm | 76% | 3.7 m/s | 4.7 |
| 2015 | 12.4°C | 6.4°C | 0.5°C | 20.2°C | -4.1°C | 53 mm | 77% | 4 m/s | 4.6 |
| 2014 | 11.8°C | 6.0°C | 0.1°C | 21.3°C | -7.1°C | 71 mm | 77% | 4.3 m/s | 4.7 |
| 2013 | 10.3°C | 5.1°C | -0.1°C | 22.3°C | -5.6°C | 84 mm | 80% | 4.3 m/s | 4.3 |
| 2012 | 13.0°C | 6.8°C | 0.6°C | 21.8°C | -3.0°C | 35 mm | 69% | 4 m/s | 4.9 |
| 2011 | 12.0°C | 6.5°C | 1.1°C | 21.5°C | -3.2°C | 61 mm | 78% | 4.6 m/s | 3.6 |
| 2010 🔥 | 16.7°C | 10.0°C | 3.4°C | 25.3°C | -3.0°C | 29 mm | 65% | 3.9 m/s | 5 |
| 2009 | 13.0°C | 7.3°C | 1.5°C | 24.3°C | -4.5°C | 59 mm | 73% | 4.7 m/s | 5 |
| 2008 | 15.2°C | 8.8°C | 2.3°C | 23.3°C | -4.7°C | 25 mm | 71% | 3.7 m/s | 5.4 |
| 2007 | 11.2°C | 6.0°C | 0.9°C | 23.4°C | -6.4°C | 29 mm | 73% | 4.4 m/s | 4.4 |
| 2006 | 15.0°C | 8.6°C | 2.2°C | 24.2°C | -5.1°C | 29 mm | 69% | 3.8 m/s | 5.1 |
| 2005 | 13.2°C | 7.2°C | 1.2°C | 25.3°C | -1.5°C | 58 mm | 74% | 4 m/s | 4.8 |
| 2004 | 11.9°C | 6.7°C | 1.5°C | 21.4°C | -6.1°C | 58 mm | 80% | 4.1 m/s | 4.5 |
| 2003 | 10.9°C | 5.0°C | -0.9°C | 23.5°C | -13.2°C | 51 mm | 78% | 4.3 m/s | 4.9 |
| 2002 | 11.0°C | 6.2°C | 1.4°C | 23.1°C | -4.1°C | 100 mm | 83% | 3.7 m/s | 4.2 |
| 2001 | 13.0°C | 7.2°C | 1.3°C | 21.4°C | -3.6°C | 65 mm | 79% | 3.7 m/s | 4.8 |
| 2000 🌧️ | 11.2°C | 6.1°C | 1.1°C | 20.9°C | -6.4°C | 119 mm | 78% | 3.4 m/s | 4.4 |
| 1999 | 12.5°C | 7.0°C | 1.6°C | 19.9°C | -2.7°C | 70 mm | 75% | 4 m/s | 4.8 |
| 1998 | 13.5°C | 7.7°C | 2.0°C | 18.4°C | -3.7°C | 39 mm | 70% | 3.5 m/s | 5.2 |
| 1997 | 10.5°C | 4.9°C | -0.6°C | 19.0°C | -6.7°C | 19 mm | 75% | 3.7 m/s | 5.2 |
| 1996 | 9.7°C | 4.5°C | -0.7°C | 20.2°C | -5.2°C | 77 mm | 77% | 4.4 m/s | 4.4 |
| 1995 | 9.8°C | 4.4°C | -1.0°C | 16.7°C | -6.5°C | 68 mm | 75% | 4.3 m/s | 4.1 |
| 1994 | 12.7°C | 6.7°C | 0.7°C | 23.4°C | -4.6°C | 59 mm | 74% | 4.5 m/s | 4.9 |
| 1993 | 11.4°C | 6.1°C | 0.8°C | 19.5°C | -3.6°C | 56 mm | 80% | 3.9 m/s | 4.2 |
| 1992 | 10.8°C | 5.6°C | 0.4°C | 21.0°C | -5.8°C | 54 mm | 79% | 3.4 m/s | 4 |
| 1991 | 13.2°C | 8.3°C | 3.3°C | 22.9°C | -3.3°C | 74 mm | 81% | 4.4 m/s | 4.2 |
| 1990 | 12.3°C | 7.3°C | 2.2°C | 25.5°C | -5.2°C | 38 mm | 78% | 3.6 m/s | 4.8 |
| 1989 | 10.0°C | 4.7°C | -0.7°C | 19.1°C | -6.0°C | 43 mm | 75% | 3.3 m/s | 4.9 |
| 1988 | 12.4°C | 6.7°C | 1.0°C | 20.1°C | -3.6°C | 45 mm | 77% | 3.9 m/s | 5 |
| 1987 | 14.0°C | 8.4°C | 2.8°C | 24.5°C | -9.9°C | 44 mm | 78% | 3.9 m/s | 4.7 |
| 1986 | 12.8°C | 7.3°C | 1.9°C | 25.0°C | -4.6°C | 62 mm | 80% | 3.7 m/s | 5 |
| 1985 | 13.5°C | 8.2°C | 3.0°C | 24.5°C | -5.2°C | 66 mm | 83% | 3.8 m/s | 5.4 |
| 1984 | 11.4°C | 6.6°C | 1.8°C | 20.4°C | -3.4°C | 64 mm | 82% | 3.9 m/s | 4.4 |
| 1983 | 9.8°C | 5.1°C | 0.5°C | 21.5°C | -3.1°C | 85 mm | 82% | 4.3 m/s | — |
| 1982 | 9.3°C | 3.6°C | -2.1°C | 19.2°C | -10.9°C | 63 mm | 79% | 4.6 m/s | — |
| 1981 | 12.6°C | 6.8°C | 0.9°C | 19.3°C | -5.1°C | 93 mm | 75% | 4.8 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 12.1°C with lows near 1.1°C (mean 6.6°C), based on 45 years of NASA POWER data.
April averages 57 mm of rainfall in St. Thomas, about average for rainfall. The wettest on record was 119 mm in 2000.
The hottest April reached 27.8°C in 2023. The coldest dipped to -13.2°C in 2003.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 1.9°C. Daytime highs moved from 11.3°C to 13.7°C and overnight lows from 0.8°C to 2.3°C over the same span.
April is one of the cooler months of the year in St. Thomas and about average for rainfall, so plan for around 12.1°C daytime highs and 1.1°C at night.
Not quite — April is the 6th coolest month in St. Thomas, averaging 6.6°C.
For April in St. Thomas, pack warm layers and a jacket for chilly mornings, with typical highs of 12.1°C and lows of 1.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 76% — quite humid.
Average wind speed in April is 4 m/s. The windiest April on record averaged 4.8 m/s (1981).
The wettest April on record was 2000 with 119 mm. On average, April sees 57 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 April, 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 April specifically, along with year-by-year records and how the month has changed over the decades.
