St. John's weather in May
In May, St. John's sees average daytime highs of 27°C and overnight lows near 26°C, with 62 mm of rain across 12.4 wet days and about 12.8 hours of daylight. It is the 7th-warmest and 6th-wettest month of the year here.
Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 43% of the time in May, and the air most often feels oppressive.
Daylight stretches from about 12 h 36 min at the start of May to 12 h 54 min by month's end. Set against the rest of the year, May is St. John's's 9th-clearest and 8th-windiest month. For the whole year in context, see St. John's's year-round climate.
- Daytime high
- 27°
- 7th warmest
- Overnight low
- 26°
- 6th coldest
- Rainfall
- 62 mm
- 12.4 wet days
- Daylight
- 12 h 48 min
- 5:40 AM – 6:28 PM
- Cloud cover
- 54%
- 9th clearest
- Wind
- 24 km/h
- 8th windiest
- Solar energy
- 6.55 kWh/m²
- Travel score
- 6.3
- out of 10
St. John's is largest city of Antigua and Barbuda.
- Density
- 5,174/km²
- people per km²
- Founded
- 1666
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in May
Day-to-day highs hold fairly steady near 27°C through the month.
A typical May day in St. John's reaches about 27°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 26°C and 28°C. Set against its neighbours, May runs about 1°C warmer than April and on par with June.
| 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) | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 |
| Avg low (°C) | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 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 | 26 | 25 |
| 2 | 26 | 25 |
| 3 | 26 | 25 |
| 4 | 27 | 25 |
| 5 | 27 | 25 |
| 6 | 27 | 25 |
| 7 | 27 | 25 |
| 8 | 27 | 25 |
| 9 | 27 | 25 |
| 10 | 27 | 25 |
| 11 | 27 | 25 |
| 12 | 27 | 25 |
| 13 | 27 | 25 |
| 14 | 27 | 26 |
| 15 | 27 | 26 |
| 16 | 27 | 26 |
| 17 | 27 | 26 |
| 18 | 27 | 26 |
| 19 | 27 | 26 |
| 20 | 27 | 26 |
| 21 | 27 | 26 |
| 22 | 27 | 26 |
| 23 | 27 | 26 |
| 24 | 27 | 26 |
| 25 | 27 | 26 |
| 26 | 27 | 26 |
| 27 | 27 | 26 |
| 28 | 27 | 26 |
| 29 | 27 | 26 |
| 30 | 27 | 26 |
| 31 | 27 | 26 |
How May really feels in St. John's
Once humidity and wind are folded in, May 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.
May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
St. John's weather by month
How May compares with the rest of the year at a glance. May is the 7th-warmest and 6th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 26° / 24° | 32 | 10 | 11.1 | 7.3 |
| Feb | 25° / 24° | 21 | 7.1 | 11.4 | 7.7 |
| Mar | 25° / 24° | 21 | 6.6 | 11.9 | 7.8 |
| Apr | 26° / 25° | 33 | 8.8 | 12.4 | 7.2 |
| May | 27° / 26° | 62 | 12.4 | 12.8 | 6.3 |
| Jun | 27° / 26° | 51 | 12.1 | 13 | 6.1 |
| Jul | 28° / 26° | 78 | 15.9 | 12.9 | 5.8 |
| Aug | 28° / 26° | 98 | 17.8 | 12.6 | 5.4 |
| Sep | 28° / 26° | 127 | 18 | 12.1 | 4.9 |
| Oct | 28° / 26° | 132 | 18.8 | 11.6 | 5.2 |
| Nov | 27° / 26° | 103 | 15.8 | 11.2 | 5.8 |
| Dec | 26° / 25° | 58 | 13.3 | 11 | 6.6 |
Cloud cover in May
The sky is clear or mostly clear about 43% of the time in May.
Beyond those clear spells, partly cloudy skies cover about 16% of May, with mostly cloudy or overcast conditions the remaining 41%. 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 72 | 71 | 69 | 68 | 67 | 64 | 63 | 62 | 61 | 60 | 59 | 58 | 57 | 57 | 57 | 56 | 56 | 56 | 55 | 55 | 55 | 54 | 54 | 54 | 54 | 54 | 55 | 55 | 55 | 55 | 55 |
| Cloudier (%) | 28 | 29 | 31 | 32 | 33 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 43 | 43 | 44 | 44 | 44 | 45 | 45 | 45 | 46 | 46 | 46 | 46 | 46 | 45 | 45 | 45 | 45 | 45 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 72 | 28 |
| 2 | 71 | 29 |
| 3 | 69 | 31 |
| 4 | 68 | 32 |
| 5 | 67 | 33 |
| 6 | 64 | 36 |
| 7 | 63 | 37 |
| 8 | 62 | 38 |
| 9 | 61 | 39 |
| 10 | 60 | 40 |
| 11 | 59 | 41 |
| 12 | 58 | 42 |
| 13 | 57 | 43 |
| 14 | 57 | 43 |
| 15 | 57 | 43 |
| 16 | 56 | 44 |
| 17 | 56 | 44 |
| 18 | 56 | 44 |
| 19 | 55 | 45 |
| 20 | 55 | 45 |
| 21 | 55 | 45 |
| 22 | 54 | 46 |
| 23 | 54 | 46 |
| 24 | 54 | 46 |
| 25 | 54 | 46 |
| 26 | 54 | 46 |
| 27 | 55 | 45 |
| 28 | 55 | 45 |
| 29 | 55 | 45 |
| 30 | 55 | 45 |
| 31 | 55 | 45 |
Chance of precipitation in May
St. John's gets around 62 mm of rain over 12.4 wet days in May. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 39% and peaks near 40% 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 36 | 37 | 37 | 38 | 39 | 39 | 40 | 40 | 40 | 39 | 39 | 39 | 39 | 39 | 38 | 38 | 38 | 38 | 38 | 38 | 38 | 39 | 39 | 39 | 39 | 40 | 40 | 40 | 40 | 40 | 40 |
| Rain chance (%) | |
|---|---|
| 1 | 36 |
| 2 | 37 |
| 3 | 37 |
| 4 | 38 |
| 5 | 39 |
| 6 | 39 |
| 7 | 40 |
| 8 | 40 |
| 9 | 40 |
| 10 | 39 |
| 11 | 39 |
| 12 | 39 |
| 13 | 39 |
| 14 | 39 |
| 15 | 38 |
| 16 | 38 |
| 17 | 38 |
| 18 | 38 |
| 19 | 38 |
| 20 | 38 |
| 21 | 38 |
| 22 | 39 |
| 23 | 39 |
| 24 | 39 |
| 25 | 39 |
| 26 | 40 |
| 27 | 40 |
| 28 | 40 |
| 29 | 40 |
| 30 | 40 |
| 31 | 40 |
Humidity in May
Most of May feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, May lands in the oppressive band about 91% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Muggy (%) | 14 | 13 | 12 | 11 | 11 | 10 | 9 | 8 | 8 | 7 | 6 | 6 | 5 | 4 | 4 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 |
| Oppressive (%) | 86 | 87 | 87 | 88 | 88 | 89 | 90 | 91 | 91 | 92 | 92 | 92 | 93 | 94 | 93 | 94 | 93 | 94 | 94 | 93 | 94 | 94 | 93 | 93 | 92 | 92 | 92 | 91 | 91 | 91 | 91 |
| Miserable (%) | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 3 | 3 | 4 | 4 | 4 | 5 | 5 | 5 | 6 | 6 | 7 | 7 | 7 | 8 | 8 | 8 | 9 |
| Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|
| 1 | 14 | 86 | 0 |
| 2 | 13 | 87 | 0 |
| 3 | 12 | 87 | 1 |
| 4 | 11 | 88 | 1 |
| 5 | 11 | 88 | 1 |
| 6 | 10 | 89 | 1 |
| 7 | 9 | 90 | 1 |
| 8 | 8 | 91 | 1 |
| 9 | 8 | 91 | 1 |
| 10 | 7 | 92 | 1 |
| 11 | 6 | 92 | 2 |
| 12 | 6 | 92 | 2 |
| 13 | 5 | 93 | 2 |
| 14 | 4 | 94 | 2 |
| 15 | 4 | 93 | 3 |
| 16 | 3 | 94 | 3 |
| 17 | 3 | 93 | 4 |
| 18 | 2 | 94 | 4 |
| 19 | 2 | 94 | 4 |
| 20 | 2 | 93 | 5 |
| 21 | 1 | 94 | 5 |
| 22 | 1 | 94 | 5 |
| 23 | 1 | 93 | 6 |
| 24 | 1 | 93 | 6 |
| 25 | 1 | 92 | 7 |
| 26 | 1 | 92 | 7 |
| 27 | 1 | 92 | 7 |
| 28 | 1 | 91 | 8 |
| 29 | 1 | 91 | 8 |
| 30 | 1 | 91 | 8 |
| 31 | 0 | 91 | 9 |
Wind in May
Winds average 24 km/h in May.
Across May, daily wind ranges from about 24 km/h on the calmest days to 25 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) | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 25 |
| 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 | 25 | breezy |
| 2 | 25 | breezy |
| 3 | 25 | breezy |
| 4 | 25 | breezy |
| 5 | 25 | breezy |
| 6 | 25 | breezy |
| 7 | 25 | breezy |
| 8 | 25 | breezy |
| 9 | 25 | breezy |
| 10 | 25 | breezy |
| 11 | 25 | breezy |
| 12 | 25 | breezy |
| 13 | 25 | breezy |
| 14 | 25 | breezy |
| 15 | 25 | breezy |
| 16 | 25 | 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 | 25 | breezy |
| 27 | 25 | breezy |
| 28 | 25 | breezy |
| 29 | 25 | breezy |
| 30 | 25 | breezy |
| 31 | 25 | breezy |
Sunrise & sunset in May
Daylight runs from about 12 h 36 min at the start of May to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 18 minutes over May. Sunrise moves from 5:46 AM to 5:37 AM, and sunset from 6:23 PM to 6:33 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) | 12.6 | 12.6 | 12.6 | 12.7 | 12.7 | 12.7 | 12.7 | 12.7 | 12.7 | 12.7 | 12.7 | 12.8 | 12.8 | 12.8 | 12.8 | 12.8 | 12.8 | 12.8 | 12.8 | 12.8 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 | 12.9 |
| Sunrise (AM) | 5:46 | 5:46 | 5:45 | 5:45 | 5:44 | 5:44 | 5:43 | 5:43 | 5:42 | 5:42 | 5:41 | 5:41 | 5:41 | 5:40 | 5:40 | 5:40 | 5:39 | 5:39 | 5:39 | 5:38 | 5:38 | 5:38 | 5:38 | 5:38 | 5:37 | 5:37 | 5:37 | 5:37 | 5:37 | 5:37 | 5:37 |
| Sunset (PM) | 6:23 | 6:23 | 6:23 | 6:24 | 6:24 | 6:24 | 6:25 | 6:25 | 6:25 | 6:26 | 6:26 | 6:26 | 6:27 | 6:27 | 6:27 | 6:28 | 6:28 | 6:28 | 6:29 | 6:29 | 6:29 | 6:30 | 6:30 | 6:30 | 6:31 | 6:31 | 6:32 | 6:32 | 6:32 | 6:33 | 6:33 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.6 | 5:46 | 6:23 |
| 2 | 12.6 | 5:46 | 6:23 |
| 3 | 12.6 | 5:45 | 6:23 |
| 4 | 12.7 | 5:45 | 6:24 |
| 5 | 12.7 | 5:44 | 6:24 |
| 6 | 12.7 | 5:44 | 6:24 |
| 7 | 12.7 | 5:43 | 6:25 |
| 8 | 12.7 | 5:43 | 6:25 |
| 9 | 12.7 | 5:42 | 6:25 |
| 10 | 12.7 | 5:42 | 6:26 |
| 11 | 12.7 | 5:41 | 6:26 |
| 12 | 12.8 | 5:41 | 6:26 |
| 13 | 12.8 | 5:41 | 6:27 |
| 14 | 12.8 | 5:40 | 6:27 |
| 15 | 12.8 | 5:40 | 6:27 |
| 16 | 12.8 | 5:40 | 6:28 |
| 17 | 12.8 | 5:39 | 6:28 |
| 18 | 12.8 | 5:39 | 6:28 |
| 19 | 12.8 | 5:39 | 6:29 |
| 20 | 12.8 | 5:38 | 6:29 |
| 21 | 12.9 | 5:38 | 6:29 |
| 22 | 12.9 | 5:38 | 6:30 |
| 23 | 12.9 | 5:38 | 6:30 |
| 24 | 12.9 | 5:38 | 6:30 |
| 25 | 12.9 | 5:37 | 6:31 |
| 26 | 12.9 | 5:37 | 6:31 |
| 27 | 12.9 | 5:37 | 6:32 |
| 28 | 12.9 | 5:37 | 6:32 |
| 29 | 12.9 | 5:37 | 6:32 |
| 30 | 12.9 | 5:37 | 6:33 |
| 31 | 12.9 | 5:37 | 6:33 |
Solar energy in May
Average shortwave solar energy reaching the ground each day in May, about 6.55 kWh/m².
For context, solar energy here swings from a low near 4.61 kWh/m² to a high of 6.7 kWh/m² in April across the year — May's 6.55 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) | 6.7 | 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 | 6.6 | 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 |
| 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 | 6.7 | 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 | 6.5 | Intense |
| 10 | 6.5 | Intense |
| 11 | 6.5 | Intense |
| 12 | 6.5 | Intense |
| 13 | 6.5 | Intense |
| 14 | 6.5 | Intense |
| 15 | 6.5 | Intense |
| 16 | 6.5 | Intense |
| 17 | 6.6 | Intense |
| 18 | 6.6 | Intense |
| 19 | 6.6 | Intense |
| 20 | 6.6 | Intense |
| 21 | 6.6 | Intense |
| 22 | 6.6 | Intense |
| 23 | 6.6 | Intense |
| 24 | 6.6 | Intense |
| 25 | 6.6 | Intense |
| 26 | 6.6 | Intense |
| 27 | 6.6 | Intense |
| 28 | 6.6 | Intense |
| 29 | 6.6 | Intense |
| 30 | 6.6 | Intense |
| 31 | 6.6 | Intense |
Hazard calendar for St. John's
In May, St. John's sits inside its rainy season season. The full year is below, with each hazard's peak months called out.
St. John's sits in the Atlantic hurricane belt; the season peaks August–October.
St. John's's rainy season runs July–November, when most of the year's rain falls.
St. John's sees seasonal dust haze (July), heaviest in July.
Is May a good time to visit St. John's?
Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
May is a reasonable time to visit St. John's for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for St. John's in May
From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In May, St. John's sees daytime highs around 27°C and nights near 26°C. Pack sun protection. Worth having: light clothes, rain gear and a windbreaker. About 12 days see rain.
Sea temperature near St. John's in May
The nearest coast averages about 27°C in May — 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 St. John's in May
Clear-sky midday UV in May 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 St. John's peaks around April 10 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 7 (very 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 | Very 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 | Very high |
Air quality in St. John's in May
Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.
Air quality in St. John's is worst in July — around 24 µg/m³ PM2.5 (moderate), about 3.2× the cleanest month (December, 8 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) | 8 | 10 | 9 | 11 | 14 | 24 | 24 | 20 | 16 | 17 | 11 | 8 |
| Level | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 8 | Good |
| Feb | 10 | Good |
| Mar | 9 | Good |
| Apr | 11 | Good |
| May | 14 | Moderate |
| Jun | 24 | Moderate |
| Jul | 24 | Moderate |
| Aug | 20 | Moderate |
| Sep | 16 | Moderate |
| Oct | 17 | Moderate |
| Nov | 11 | Good |
| Dec | 8 | Good |
Where is St. John's?
St. John's sits at 17.1°N, 61.8°W, 12 m above sea level, in Antigua and Barbuda. The nearest listed city is Falmouth, 12 km away.
Topography around St. John's
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of St. John's.
Within 3 km, the terrain around St. John's has only modest variations in elevation — a maximum elevation change of 109 m around an average of 20 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 391 m; within 80 km, large variations in elevation — a maximum elevation change of 1,011 m.
The land around St. John's is covered by artificial surfaces (35%) and trees (31%) within 3 km, water (69%) within 16 km, and water (96%) within 80 km.
Antigua and Barbuda travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B
- 230 V · 60 Hz
- Prices
- ≈ 69% of US
- price level, 2025
- GDP per capita
- $24,819
- 2025
- Homicide rate
- 10.7
- per 100k, 2023
- Road deaths
- 0
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
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 St. John's (17.121°, -61.8433°, elevation 12 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).