Gustavia weather in July
In July, Gustavia sees average daytime highs of 28°C and overnight lows near 26°C, with 70 mm of rain across 13.8 wet days and about 13 hours of daylight. It is the 3rd-warmest and 5th-wettest month of the year here.
Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 54% of the time in July, and the air most often feels oppressive.
Daylight stretches from about 13 h 06 min at the start of July to 12 h 48 min by month's end. Set against the rest of the year, July is Gustavia's 7th-clearest and 1st-windiest month. For the whole year in context, see Gustavia's year-round climate.
- Daytime high
- 28°
- 3rd warmest
- Overnight low
- 26°
- 10th coldest
- Rainfall
- 70 mm
- 13.8 wet days
- Daylight
- 13 hours
- 5:48 AM – 6:46 PM
- Cloud cover
- 47%
- 7th clearest
- Wind
- 28 km/h
- 1st windiest
- Solar energy
- 6.57 kWh/m²
- Travel score
- 6.1
- 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 July
Day-to-day highs hold fairly steady near 28°C through the month.
A typical July day in Gustavia reaches about 28°C in the afternoon and slips back to 26°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 28°C. Set against its neighbours, July runs on par with June and on par with August.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
| Avg low (°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 | 26 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 28 | 26 |
| 2 | 28 | 26 |
| 3 | 28 | 26 |
| 4 | 28 | 26 |
| 5 | 28 | 26 |
| 6 | 28 | 26 |
| 7 | 28 | 26 |
| 8 | 28 | 26 |
| 9 | 28 | 26 |
| 10 | 28 | 26 |
| 11 | 28 | 26 |
| 12 | 28 | 26 |
| 13 | 28 | 26 |
| 14 | 28 | 26 |
| 15 | 28 | 26 |
| 16 | 28 | 26 |
| 17 | 28 | 26 |
| 18 | 28 | 26 |
| 19 | 28 | 26 |
| 20 | 28 | 26 |
| 21 | 28 | 26 |
| 22 | 28 | 26 |
| 23 | 28 | 26 |
| 24 | 28 | 26 |
| 25 | 28 | 26 |
| 26 | 28 | 26 |
| 27 | 28 | 26 |
| 28 | 28 | 26 |
| 29 | 28 | 26 |
| 30 | 28 | 26 |
| 31 | 28 | 26 |
How July really feels in Gustavia
Once humidity and wind are folded in, July 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.
July 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 July compares with the rest of the year at a glance. July is the 3rd-warmest and 5th-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 July
The sky is clear or mostly clear about 54% of the time in July.
Beyond those clear spells, partly cloudy skies cover about 13% of July, with mostly cloudy or overcast conditions the remaining 33%.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 64 | 65 | 65 | 65 | 65 | 66 | 66 | 67 | 67 | 67 | 67 | 67 | 67 | 67 | 68 | 67 | 67 | 68 | 68 | 68 | 68 | 68 | 68 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 |
| Cloudier (%) | 36 | 35 | 35 | 35 | 35 | 34 | 34 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 32 | 33 | 33 | 32 | 32 | 32 | 32 | 32 | 32 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 64 | 36 |
| 2 | 65 | 35 |
| 3 | 65 | 35 |
| 4 | 65 | 35 |
| 5 | 65 | 35 |
| 6 | 66 | 34 |
| 7 | 66 | 34 |
| 8 | 67 | 33 |
| 9 | 67 | 33 |
| 10 | 67 | 33 |
| 11 | 67 | 33 |
| 12 | 67 | 33 |
| 13 | 67 | 33 |
| 14 | 67 | 33 |
| 15 | 68 | 32 |
| 16 | 67 | 33 |
| 17 | 67 | 33 |
| 18 | 68 | 32 |
| 19 | 68 | 32 |
| 20 | 68 | 32 |
| 21 | 68 | 32 |
| 22 | 68 | 32 |
| 23 | 68 | 32 |
| 24 | 69 | 31 |
| 25 | 69 | 31 |
| 26 | 69 | 31 |
| 27 | 69 | 31 |
| 28 | 69 | 31 |
| 29 | 69 | 31 |
| 30 | 69 | 31 |
| 31 | 69 | 31 |
Chance of precipitation in July
Gustavia gets around 70 mm of rain over 13.8 wet days in July. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 44% and peaks near 47% on the wettest days. The odds climb toward the end of the month.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 42 | 43 | 44 | 45 | 45 | 46 | 46 | 46 | 46 | 46 | 46 | 46 | 46 | 46 | 47 | 47 | 47 | 47 | 47 | 47 | 46 | 46 | 46 |
| Rain chance (%) | |
|---|---|
| 1 | 35 |
| 2 | 36 |
| 3 | 37 |
| 4 | 38 |
| 5 | 39 |
| 6 | 40 |
| 7 | 41 |
| 8 | 42 |
| 9 | 42 |
| 10 | 43 |
| 11 | 44 |
| 12 | 45 |
| 13 | 45 |
| 14 | 46 |
| 15 | 46 |
| 16 | 46 |
| 17 | 46 |
| 18 | 46 |
| 19 | 46 |
| 20 | 46 |
| 21 | 46 |
| 22 | 46 |
| 23 | 47 |
| 24 | 47 |
| 25 | 47 |
| 26 | 47 |
| 27 | 47 |
| 28 | 47 |
| 29 | 46 |
| 30 | 46 |
| 31 | 46 |
Humidity in July
Most of July feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, July lands in the oppressive band about 71% of days. Sticky, muggy-or-worse air turns up on roughly 100% 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Oppressive (%) | 82 | 82 | 81 | 80 | 80 | 79 | 78 | 78 | 77 | 76 | 75 | 74 | 73 | 73 | 72 | 71 | 70 | 69 | 68 | 67 | 66 | 66 | 65 | 64 | 63 | 62 | 62 | 61 | 60 | 60 | 59 |
| Miserable (%) | 18 | 18 | 19 | 20 | 20 | 21 | 22 | 22 | 23 | 24 | 25 | 26 | 27 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 34 | 35 | 36 | 37 | 38 | 38 | 39 | 40 | 40 | 41 |
| Oppressive (%) | Miserable (%) | |
|---|---|---|
| 1 | 82 | 18 |
| 2 | 82 | 18 |
| 3 | 81 | 19 |
| 4 | 80 | 20 |
| 5 | 80 | 20 |
| 6 | 79 | 21 |
| 7 | 78 | 22 |
| 8 | 78 | 22 |
| 9 | 77 | 23 |
| 10 | 76 | 24 |
| 11 | 75 | 25 |
| 12 | 74 | 26 |
| 13 | 73 | 27 |
| 14 | 73 | 27 |
| 15 | 72 | 28 |
| 16 | 71 | 29 |
| 17 | 70 | 30 |
| 18 | 69 | 31 |
| 19 | 68 | 32 |
| 20 | 67 | 33 |
| 21 | 66 | 34 |
| 22 | 66 | 34 |
| 23 | 65 | 35 |
| 24 | 64 | 36 |
| 25 | 63 | 37 |
| 26 | 62 | 38 |
| 27 | 62 | 38 |
| 28 | 61 | 39 |
| 29 | 60 | 40 |
| 30 | 60 | 40 |
| 31 | 59 | 41 |
Wind in July
Winds average 28 km/h in July, the windiest month of the year.
Across July, daily wind ranges from about 27 km/h on the calmest days to 28 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 |
| 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 | breezy |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 28 | breezy |
| 2 | 28 | breezy |
| 3 | 28 | breezy |
| 4 | 28 | breezy |
| 5 | 28 | breezy |
| 6 | 28 | breezy |
| 7 | 28 | breezy |
| 8 | 28 | breezy |
| 9 | 28 | breezy |
| 10 | 28 | breezy |
| 11 | 28 | breezy |
| 12 | 28 | breezy |
| 13 | 28 | breezy |
| 14 | 28 | breezy |
| 15 | 28 | breezy |
| 16 | 28 | breezy |
| 17 | 28 | breezy |
| 18 | 28 | breezy |
| 19 | 28 | breezy |
| 20 | 28 | breezy |
| 21 | 28 | breezy |
| 22 | 27 | breezy |
| 23 | 27 | breezy |
| 24 | 27 | breezy |
| 25 | 27 | breezy |
| 26 | 27 | breezy |
| 27 | 27 | breezy |
| 28 | 27 | breezy |
| 29 | 27 | breezy |
| 30 | 27 | breezy |
| 31 | 27 | breezy |
Sunrise & sunset in July
Daylight runs from about 13 h 06 min at the start of July to 12 h 48 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 18 minutes over July. Sunrise moves from 5:43 AM to 5:53 AM, and sunset from 6:47 PM to 6:42 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 13.1 | 13.1 | 13.1 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.8 | 12.8 | 12.8 |
| Sunrise (AM) | 5:43 | 5:43 | 5:44 | 5:44 | 5:44 | 5:44 | 5:45 | 5:45 | 5:45 | 5:46 | 5:46 | 5:46 | 5:47 | 5:47 | 5:47 | 5:48 | 5:48 | 5:48 | 5:49 | 5:49 | 5:49 | 5:50 | 5:50 | 5:50 | 5:51 | 5:51 | 5:51 | 5:52 | 5:52 | 5:52 | 5:53 |
| Sunset (PM) | 6:47 | 6:47 | 6:47 | 6:47 | 6:47 | 6:47 | 6:47 | 6:47 | 6:47 | 6:47 | 6:47 | 6:47 | 6:47 | 6:47 | 6:46 | 6:46 | 6:46 | 6:46 | 6:46 | 6:46 | 6:45 | 6:45 | 6:45 | 6:45 | 6:44 | 6:44 | 6:44 | 6:43 | 6:43 | 6:43 | 6:42 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.1 | 5:43 | 6:47 |
| 2 | 13.1 | 5:43 | 6:47 |
| 3 | 13.1 | 5:44 | 6:47 |
| 4 | 13.0 | 5:44 | 6:47 |
| 5 | 13.0 | 5:44 | 6:47 |
| 6 | 13.0 | 5:44 | 6:47 |
| 7 | 13.0 | 5:45 | 6:47 |
| 8 | 13.0 | 5:45 | 6:47 |
| 9 | 13.0 | 5:45 | 6:47 |
| 10 | 13.0 | 5:46 | 6:47 |
| 11 | 13.0 | 5:46 | 6:47 |
| 12 | 13.0 | 5:46 | 6:47 |
| 13 | 13.0 | 5:47 | 6:47 |
| 14 | 13.0 | 5:47 | 6:47 |
| 15 | 13.0 | 5:47 | 6:46 |
| 16 | 13.0 | 5:48 | 6:46 |
| 17 | 13.0 | 5:48 | 6:46 |
| 18 | 13.0 | 5:48 | 6:46 |
| 19 | 13.0 | 5:49 | 6:46 |
| 20 | 12.9 | 5:49 | 6:46 |
| 21 | 12.9 | 5:49 | 6:45 |
| 22 | 12.9 | 5:50 | 6:45 |
| 23 | 12.9 | 5:50 | 6:45 |
| 24 | 12.9 | 5:50 | 6:45 |
| 25 | 12.9 | 5:51 | 6:44 |
| 26 | 12.9 | 5:51 | 6:44 |
| 27 | 12.9 | 5:51 | 6:44 |
| 28 | 12.9 | 5:52 | 6:43 |
| 29 | 12.8 | 5:52 | 6:43 |
| 30 | 12.8 | 5:52 | 6:43 |
| 31 | 12.8 | 5:53 | 6:42 |
Solar energy in July
Average shortwave solar energy reaching the ground each day in July, about 6.57 kWh/m².
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 — July's 6.57 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 |
| 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 | 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 | 6.6 | Intense |
| 15 | 6.6 | Intense |
| 16 | 6.6 | Intense |
| 17 | 6.6 | Intense |
| 18 | 6.6 | Intense |
| 19 | 6.6 | Intense |
| 20 | 6.6 | Intense |
| 21 | 6.6 | Intense |
| 22 | 6.5 | Intense |
| 23 | 6.5 | Intense |
| 24 | 6.5 | Intense |
| 25 | 6.5 | Intense |
| 26 | 6.5 | Intense |
| 27 | 6.5 | Intense |
| 28 | 6.5 | Intense |
| 29 | 6.5 | Intense |
| 30 | 6.5 | Intense |
| 31 | 6.5 | Intense |
Hazard calendar for Gustavia
In July, Gustavia sits inside its atlantic hurricane, rainy season and dust season. The full year is below, with each hazard's peak months called out.
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 July a good time to visit Gustavia?
Our two travel scores rate July for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
July is a reasonable time to visit Gustavia for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Gustavia in July
From July's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In July, Gustavia sees daytime highs around 28°C and nights near 26°C. Pack light clothes and sun protection. Worth having: rain gear and a windbreaker. About 14 days see rain.
Sea temperature near Gustavia in July
The nearest coast averages about 28°C in July — 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 July
Clear-sky midday UV in July peaks around 12 (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 July
Average fine-particle pollution (PM2.5) through the year — so you can see where July 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).