Gustavia weather in April
In April, Gustavia sees average daytime highs of 26°C and overnight lows near 25°C, with 30 mm of rain across 7.4 wet days and about 12.4 hours of daylight. It is the 9th-warmest and 9th-wettest month of the year here.
Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 67% of the time in April, and the air most often feels oppressive.
Daylight stretches from about 12 h 12 min at the start of April to 12 h 36 min by month's end. Set against the rest of the year, April is Gustavia's 5th-clearest and 8th-windiest month. For the whole year in context, see Gustavia's year-round climate.
- Daytime high
- 26°
- 9th warmest
- Overnight low
- 25°
- 4th coldest
- Rainfall
- 30 mm
- 7.4 wet days
- Daylight
- 12 h 24 min
- 5:59 AM – 6:24 PM
- Cloud cover
- 35%
- 5th clearest
- Wind
- 24 km/h
- 8th windiest
- Solar energy
- 6.68 kWh/m²
- Travel score
- 7.5
- out of 10
Gustavia is main settlement and capital city of St. Barthélemy.
- Founded
- 1785
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in April
Day-to-day highs hold fairly steady near 26°C through the month.
A typical April day in Gustavia reaches about 26°C in the afternoon and slips back to 25°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 27°C. Set against its neighbours, April runs on par with March and about 1°C cooler than May.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 |
| Avg low (°C) | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 26 | 24 |
| 2 | 26 | 24 |
| 3 | 26 | 24 |
| 4 | 26 | 24 |
| 5 | 26 | 24 |
| 6 | 26 | 24 |
| 7 | 26 | 24 |
| 8 | 26 | 25 |
| 9 | 26 | 25 |
| 10 | 26 | 25 |
| 11 | 26 | 25 |
| 12 | 26 | 25 |
| 13 | 26 | 25 |
| 14 | 26 | 25 |
| 15 | 26 | 25 |
| 16 | 26 | 25 |
| 17 | 26 | 25 |
| 18 | 26 | 25 |
| 19 | 26 | 25 |
| 20 | 26 | 25 |
| 21 | 26 | 25 |
| 22 | 26 | 25 |
| 23 | 26 | 25 |
| 24 | 26 | 25 |
| 25 | 26 | 25 |
| 26 | 26 | 25 |
| 27 | 26 | 25 |
| 28 | 26 | 25 |
| 29 | 26 | 25 |
| 30 | 26 | 25 |
How April really feels in Gustavia
Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
April sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Gustavia weather by month
How April compares with the rest of the year at a glance. April is the 9th-warmest and 9th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 26° / 24° | 26 | 9.1 | 11 | 7.5 |
| Feb | 25° / 24° | 20 | 6.4 | 11.4 | 7.8 |
| Mar | 25° / 24° | 19 | 5.4 | 11.9 | 8.1 |
| Apr | 26° / 25° | 30 | 7.4 | 12.4 | 7.5 |
| May | 27° / 26° | 61 | 11.5 | 12.8 | 6.5 |
| Jun | 27° / 26° | 46 | 10.3 | 13.1 | 6.4 |
| Jul | 28° / 26° | 70 | 13.8 | 13 | 6.1 |
| Aug | 28° / 27° | 84 | 15 | 12.6 | 5.6 |
| Sep | 28° / 27° | 114 | 16.8 | 12.1 | 5.1 |
| Oct | 28° / 26° | 129 | 16.2 | 11.6 | 5.6 |
| Nov | 27° / 26° | 101 | 14.1 | 11.2 | 6.1 |
| Dec | 26° / 25° | 46 | 10.8 | 10.9 | 7.0 |
Cloud cover in April
The sky is clear or mostly clear about 67% of the time in April.
Beyond those clear spells, partly cloudy skies cover about 14% of April, with mostly cloudy or overcast conditions the remaining 19%. Skies tend to cloud over as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 85 | 85 | 86 | 86 | 86 | 86 | 85 | 85 | 85 | 83 | 83 | 83 | 81 | 81 | 81 | 80 | 79 | 79 | 79 | 79 | 79 | 79 | 79 | 78 | 78 | 78 | 78 | 77 | 76 | 74 |
| Cloudier (%) | 15 | 15 | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 17 | 17 | 17 | 19 | 19 | 19 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 23 | 24 | 26 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 85 | 15 |
| 2 | 85 | 15 |
| 3 | 86 | 14 |
| 4 | 86 | 14 |
| 5 | 86 | 14 |
| 6 | 86 | 14 |
| 7 | 85 | 15 |
| 8 | 85 | 15 |
| 9 | 85 | 15 |
| 10 | 83 | 17 |
| 11 | 83 | 17 |
| 12 | 83 | 17 |
| 13 | 81 | 19 |
| 14 | 81 | 19 |
| 15 | 81 | 19 |
| 16 | 80 | 20 |
| 17 | 79 | 21 |
| 18 | 79 | 21 |
| 19 | 79 | 21 |
| 20 | 79 | 21 |
| 21 | 79 | 21 |
| 22 | 79 | 21 |
| 23 | 79 | 21 |
| 24 | 78 | 22 |
| 25 | 78 | 22 |
| 26 | 78 | 22 |
| 27 | 78 | 22 |
| 28 | 77 | 23 |
| 29 | 76 | 24 |
| 30 | 74 | 26 |
Chance of precipitation in April
Gustavia gets around 30 mm of rain over 7.4 wet days in April. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 26% and peaks near 29% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 22 | 22 | 22 | 23 | 23 | 23 | 24 | 24 | 25 | 25 | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 29 |
| Rain chance (%) | |
|---|---|
| 1 | 22 |
| 2 | 22 |
| 3 | 22 |
| 4 | 23 |
| 5 | 23 |
| 6 | 23 |
| 7 | 24 |
| 8 | 24 |
| 9 | 25 |
| 10 | 25 |
| 11 | 26 |
| 12 | 26 |
| 13 | 26 |
| 14 | 27 |
| 15 | 27 |
| 16 | 27 |
| 17 | 27 |
| 18 | 27 |
| 19 | 27 |
| 20 | 27 |
| 21 | 27 |
| 22 | 27 |
| 23 | 27 |
| 24 | 27 |
| 25 | 27 |
| 26 | 27 |
| 27 | 27 |
| 28 | 28 |
| 29 | 28 |
| 30 | 29 |
Humidity in April
Most of April feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, April lands in the oppressive band about 62% of days. Sticky, muggy-or-worse air turns up on roughly 96% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Comfortable (%) | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Humid (%) | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Muggy (%) | 47 | 45 | 44 | 43 | 42 | 42 | 41 | 40 | 39 | 39 | 38 | 38 | 37 | 37 | 36 | 35 | 35 | 34 | 33 | 32 | 31 | 29 | 28 | 27 | 25 | 24 | 22 | 21 | 20 | 19 |
| Oppressive (%) | 47 | 49 | 50 | 50 | 51 | 51 | 53 | 54 | 55 | 55 | 56 | 57 | 59 | 59 | 60 | 62 | 62 | 63 | 65 | 66 | 67 | 69 | 70 | 71 | 73 | 74 | 76 | 77 | 78 | 79 |
| Miserable (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|
| 1 | 0 | 6 | 47 | 47 | 0 |
| 2 | 0 | 6 | 45 | 49 | 0 |
| 3 | 1 | 6 | 44 | 50 | 0 |
| 4 | 1 | 6 | 43 | 50 | 0 |
| 5 | 1 | 6 | 42 | 51 | 0 |
| 6 | 1 | 6 | 42 | 51 | 0 |
| 7 | 1 | 5 | 41 | 53 | 0 |
| 8 | 1 | 5 | 40 | 54 | 0 |
| 9 | 1 | 5 | 39 | 55 | 0 |
| 10 | 1 | 5 | 39 | 55 | 0 |
| 11 | 1 | 5 | 38 | 56 | 0 |
| 12 | 1 | 4 | 38 | 57 | 0 |
| 13 | 0 | 4 | 37 | 59 | 0 |
| 14 | 0 | 4 | 37 | 59 | 0 |
| 15 | 0 | 4 | 36 | 60 | 0 |
| 16 | 0 | 3 | 35 | 62 | 0 |
| 17 | 0 | 3 | 35 | 62 | 0 |
| 18 | 0 | 3 | 34 | 63 | 0 |
| 19 | 0 | 2 | 33 | 65 | 0 |
| 20 | 0 | 2 | 32 | 66 | 0 |
| 21 | 0 | 2 | 31 | 67 | 0 |
| 22 | 0 | 2 | 29 | 69 | 0 |
| 23 | 0 | 1 | 28 | 70 | 1 |
| 24 | 0 | 1 | 27 | 71 | 1 |
| 25 | 0 | 1 | 25 | 73 | 1 |
| 26 | 0 | 1 | 24 | 74 | 1 |
| 27 | 0 | 1 | 22 | 76 | 1 |
| 28 | 0 | 1 | 21 | 77 | 1 |
| 29 | 0 | 1 | 20 | 78 | 1 |
| 30 | 0 | 1 | 19 | 79 | 1 |
Wind in April
Winds average 24 km/h in April.
Across April, daily wind ranges from about 23 km/h on the calmest days to 24 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
| Feels | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 23 | breezy |
| 2 | 23 | breezy |
| 3 | 23 | breezy |
| 4 | 23 | breezy |
| 5 | 23 | breezy |
| 6 | 23 | breezy |
| 7 | 23 | breezy |
| 8 | 23 | breezy |
| 9 | 24 | breezy |
| 10 | 24 | breezy |
| 11 | 24 | breezy |
| 12 | 24 | breezy |
| 13 | 24 | breezy |
| 14 | 24 | breezy |
| 15 | 24 | breezy |
| 16 | 24 | breezy |
| 17 | 24 | breezy |
| 18 | 24 | breezy |
| 19 | 24 | breezy |
| 20 | 24 | breezy |
| 21 | 24 | breezy |
| 22 | 24 | breezy |
| 23 | 24 | breezy |
| 24 | 24 | breezy |
| 25 | 24 | breezy |
| 26 | 24 | breezy |
| 27 | 24 | breezy |
| 28 | 24 | breezy |
| 29 | 24 | breezy |
| 30 | 24 | breezy |
Sunrise & sunset in April
Daylight runs from about 12 h 12 min at the start of April to 12 h 36 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 24 minutes over April. Sunrise moves from 6:12 AM to 5:50 AM, and sunset from 6:21 PM to 6:27 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 |
| Sunrise (AM) | 6:12 | 6:11 | 6:10 | 6:09 | 6:08 | 6:07 | 6:07 | 6:06 | 6:05 | 6:04 | 6:03 | 6:03 | 6:02 | 6:01 | 6:00 | 5:59 | 5:59 | 5:58 | 5:57 | 5:57 | 5:56 | 5:55 | 5:54 | 5:54 | 5:53 | 5:52 | 5:52 | 5:51 | 5:51 | 5:50 |
| Sunset (PM) | 6:21 | 6:21 | 6:21 | 6:21 | 6:21 | 6:22 | 6:22 | 6:22 | 6:22 | 6:22 | 6:23 | 6:23 | 6:23 | 6:23 | 6:24 | 6:24 | 6:24 | 6:24 | 6:24 | 6:25 | 6:25 | 6:25 | 6:26 | 6:26 | 6:26 | 6:26 | 6:27 | 6:27 | 6:27 | 6:27 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.2 | 6:12 | 6:21 |
| 2 | 12.2 | 6:11 | 6:21 |
| 3 | 12.2 | 6:10 | 6:21 |
| 4 | 12.2 | 6:09 | 6:21 |
| 5 | 12.2 | 6:08 | 6:21 |
| 6 | 12.2 | 6:07 | 6:22 |
| 7 | 12.3 | 6:07 | 6:22 |
| 8 | 12.3 | 6:06 | 6:22 |
| 9 | 12.3 | 6:05 | 6:22 |
| 10 | 12.3 | 6:04 | 6:22 |
| 11 | 12.3 | 6:03 | 6:23 |
| 12 | 12.3 | 6:03 | 6:23 |
| 13 | 12.4 | 6:02 | 6:23 |
| 14 | 12.4 | 6:01 | 6:23 |
| 15 | 12.4 | 6:00 | 6:24 |
| 16 | 12.4 | 5:59 | 6:24 |
| 17 | 12.4 | 5:59 | 6:24 |
| 18 | 12.4 | 5:58 | 6:24 |
| 19 | 12.5 | 5:57 | 6:24 |
| 20 | 12.5 | 5:57 | 6:25 |
| 21 | 12.5 | 5:56 | 6:25 |
| 22 | 12.5 | 5:55 | 6:25 |
| 23 | 12.5 | 5:54 | 6:26 |
| 24 | 12.5 | 5:54 | 6:26 |
| 25 | 12.5 | 5:53 | 6:26 |
| 26 | 12.6 | 5:52 | 6:26 |
| 27 | 12.6 | 5:52 | 6:27 |
| 28 | 12.6 | 5:51 | 6:27 |
| 29 | 12.6 | 5:51 | 6:27 |
| 30 | 12.6 | 5:50 | 6:27 |
Solar energy in April
Average shortwave solar energy reaching the ground each day in April, about 6.68 kWh/m² — the sunniest month for solar.
For context, solar energy here swings from a low near 4.5 kWh/m² to a high of 6.68 kWh/m² in April across the year — April's 6.68 kWh/m² sits near the top of that range.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.6 | 6.6 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.6 | Intense |
| 2 | 6.6 | Intense |
| 3 | 6.6 | Intense |
| 4 | 6.6 | Intense |
| 5 | 6.6 | Intense |
| 6 | 6.6 | Intense |
| 7 | 6.6 | Intense |
| 8 | 6.6 | Intense |
| 9 | 6.6 | Intense |
| 10 | 6.6 | Intense |
| 11 | 6.6 | Intense |
| 12 | 6.6 | Intense |
| 13 | 6.6 | Intense |
| 14 | 6.7 | Intense |
| 15 | 6.7 | Intense |
| 16 | 6.7 | Intense |
| 17 | 6.7 | Intense |
| 18 | 6.7 | Intense |
| 19 | 6.7 | Intense |
| 20 | 6.7 | Intense |
| 21 | 6.7 | Intense |
| 22 | 6.7 | Intense |
| 23 | 6.7 | Intense |
| 24 | 6.7 | Intense |
| 25 | 6.7 | Intense |
| 26 | 6.7 | Intense |
| 27 | 6.7 | Intense |
| 28 | 6.7 | Intense |
| 29 | 6.6 | Intense |
| 30 | 6.6 | Intense |
Hazard calendar for Gustavia
None of Gustavia's seasonal hazards are active in April. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Gustavia sits in the Atlantic hurricane belt; the season peaks August–October.
Gustavia's rainy season runs July–November, when most of the year's rain falls.
Gustavia sees seasonal dust haze (July), heaviest in July.
Is April a good time to visit Gustavia?
Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
April is one of the better times to visit Gustavia for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Gustavia in April
From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In April, Gustavia sees daytime highs around 26°C and nights near 25°C. Pack sun protection. Worth having: light clothes and a windbreaker. About 7 days see rain.
Sea temperature near Gustavia in April
The nearest coast averages about 27°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in September at about 29°C and coldest in February near 26°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 27 | 26 | 26 | 27 | 27 | 28 | 28 | 29 | 29 | 29 | 28 | 27 |
| Comfort | Warm | Warm | Warm | Warm | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 27 | Warm |
| Feb | 26 | Warm |
| Mar | 26 | Warm |
| Apr | 27 | Warm |
| May | 27 | Warm |
| Jun | 28 | Warm |
| Jul | 28 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 28 | Tropical |
| Dec | 27 | Warm |
UV index in Gustavia in April
Clear-sky midday UV in April peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Gustavia peaks around April 11 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 7 (high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 8 | 11 | 13 | 13 | 12 | 12 | 12 | 11 | 12 | 10 | 8 | 7 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 11 | Extreme |
| Mar | 13 | Extreme |
| Apr | 13 | Extreme |
| May | 12 | Extreme |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 11 | Extreme |
| Sep | 12 | Extreme |
| Oct | 10 | Extreme |
| Nov | 8 | Very high |
| Dec | 7 | High |
Air quality in Gustavia in April
Average fine-particle pollution (PM2.5) through the year — so you can see where April falls, not just the annual average.
Air quality in Gustavia is worst in July — around 23 µg/m³ PM2.5 (moderate), about 4.1× the cleanest month (December, 6 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 6 | 8 | 7 | 9 | 13 | 22 | 23 | 19 | 15 | 16 | 9 | 6 |
| Level | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 6 | Good |
| Feb | 8 | Good |
| Mar | 7 | Good |
| Apr | 9 | Good |
| May | 13 | Moderate |
| Jun | 22 | Moderate |
| Jul | 23 | Moderate |
| Aug | 19 | Moderate |
| Sep | 15 | Moderate |
| Oct | 16 | Moderate |
| Nov | 9 | Good |
| Dec | 6 | Good |
Where is Gustavia?
Gustavia sits at 17.9°N, 62.8°W, 6 m above sea level, in Saint Barthelemy. The nearest listed city is Philipsburg, 25 km away.
Topography around Gustavia
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Gustavia.
Within 3 km, the terrain around Gustavia has only modest variations in elevation — a maximum elevation change of 187 m around an average of 22 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 273 m; within 80 km, large variations in elevation — a maximum elevation change of 1,092 m.
The land around Gustavia is covered by water (66%) and trees (20%) within 3 km, water (98%) within 16 km, and water (97%) within 80 km.
Saint Barthelemy travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Gustavia (17.8962°, -62.8498°, elevation 6 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).