St. John's weather in March
In March, St. John's sees average daytime highs of 25°C and overnight lows near 24°C, with 21 mm of rain across 6.6 wet days and about 11.9 hours of daylight. It is the 11th-warmest and 11th-wettest month of the year here.
Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 74% of the time in March, and the air most often feels muggy.
Daylight stretches from about 11 h 36 min at the start of March to 12 h 06 min by month's end. Set against the rest of the year, March is St. John's's 3rd-clearest and 7th-windiest month. For the whole year in context, see St. John's's year-round climate.
- Daytime high
- 25°
- 11th warmest
- Overnight low
- 24°
- 2nd coldest
- Rainfall
- 21 mm
- 6.6 wet days
- Daylight
- 11 h 54 min
- 6:21 AM – 6:13 PM
- Cloud cover
- 33%
- 3rd clearest
- Wind
- 25 km/h
- 7th windiest
- Solar energy
- 6.33 kWh/m²
- Travel score
- 7.8
- 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 March
Day-to-day highs hold fairly steady near 25°C through the month.
A typical March day in St. John's reaches about 25°C in the afternoon and slips back to 24°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 26°C. Set against its neighbours, March runs on par with February and on par with April.
| 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) | 25 | 25 | 25 | 25 | 25 | 25 | 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 |
| Avg low (°C) | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 25 | 24 |
| 2 | 25 | 24 |
| 3 | 25 | 24 |
| 4 | 25 | 24 |
| 5 | 25 | 24 |
| 6 | 25 | 24 |
| 7 | 25 | 24 |
| 8 | 25 | 24 |
| 9 | 25 | 24 |
| 10 | 25 | 24 |
| 11 | 25 | 24 |
| 12 | 25 | 24 |
| 13 | 25 | 24 |
| 14 | 25 | 24 |
| 15 | 25 | 24 |
| 16 | 25 | 24 |
| 17 | 25 | 24 |
| 18 | 25 | 24 |
| 19 | 25 | 24 |
| 20 | 26 | 24 |
| 21 | 26 | 24 |
| 22 | 26 | 24 |
| 23 | 26 | 24 |
| 24 | 26 | 24 |
| 25 | 26 | 24 |
| 26 | 26 | 24 |
| 27 | 26 | 24 |
| 28 | 26 | 24 |
| 29 | 26 | 24 |
| 30 | 26 | 24 |
| 31 | 26 | 24 |
How March really feels in St. John's
Once humidity and wind are folded in, March 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.
March 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 March compares with the rest of the year at a glance. March is the 11th-warmest and 11th-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 March
The sky is clear or mostly clear about 74% of the time in March.
Beyond those clear spells, partly cloudy skies cover about 13% of March, with mostly cloudy or overcast conditions the remaining 13%.
| 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 (%) | 89 | 88 | 88 | 88 | 88 | 88 | 88 | 88 | 88 | 88 | 89 | 89 | 89 | 89 | 89 | 88 | 88 | 88 | 87 | 87 | 87 | 86 | 85 | 85 | 85 | 85 | 85 | 85 | 84 | 84 | 84 |
| Cloudier (%) | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 13 | 13 | 13 | 14 | 15 | 15 | 15 | 15 | 15 | 15 | 16 | 16 | 16 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 89 | 11 |
| 2 | 88 | 12 |
| 3 | 88 | 12 |
| 4 | 88 | 12 |
| 5 | 88 | 12 |
| 6 | 88 | 12 |
| 7 | 88 | 12 |
| 8 | 88 | 12 |
| 9 | 88 | 12 |
| 10 | 88 | 12 |
| 11 | 89 | 11 |
| 12 | 89 | 11 |
| 13 | 89 | 11 |
| 14 | 89 | 11 |
| 15 | 89 | 11 |
| 16 | 88 | 12 |
| 17 | 88 | 12 |
| 18 | 88 | 12 |
| 19 | 87 | 13 |
| 20 | 87 | 13 |
| 21 | 87 | 13 |
| 22 | 86 | 14 |
| 23 | 85 | 15 |
| 24 | 85 | 15 |
| 25 | 85 | 15 |
| 26 | 85 | 15 |
| 27 | 85 | 15 |
| 28 | 85 | 15 |
| 29 | 84 | 16 |
| 30 | 84 | 16 |
| 31 | 84 | 16 |
Chance of precipitation in March
St. John's gets around 21 mm of rain over 6.6 wet days in March. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 21% and peaks near 26% 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 (%) | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 20 | 20 | 21 | 22 | 22 | 23 | 24 | 25 | 25 | 26 | 26 |
| Rain chance (%) | |
|---|---|
| 1 | 21 |
| 2 | 21 |
| 3 | 21 |
| 4 | 21 |
| 5 | 21 |
| 6 | 21 |
| 7 | 21 |
| 8 | 21 |
| 9 | 21 |
| 10 | 21 |
| 11 | 20 |
| 12 | 20 |
| 13 | 20 |
| 14 | 19 |
| 15 | 19 |
| 16 | 19 |
| 17 | 19 |
| 18 | 19 |
| 19 | 19 |
| 20 | 19 |
| 21 | 20 |
| 22 | 20 |
| 23 | 21 |
| 24 | 22 |
| 25 | 22 |
| 26 | 23 |
| 27 | 24 |
| 28 | 25 |
| 29 | 25 |
| 30 | 26 |
| 31 | 26 |
Humidity in March
Most of March feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, March lands in the muggy band about 61% of days. Sticky, muggy-or-worse air turns up on roughly 92% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Humid (%) | 10 | 11 | 11 | 12 | 12 | 12 | 13 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 10 | 10 | 9 | 8 | 7 | 6 | 6 | 5 | 5 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 |
| Muggy (%) | 68 | 67 | 66 | 65 | 64 | 64 | 63 | 63 | 63 | 63 | 63 | 63 | 63 | 63 | 63 | 62 | 62 | 62 | 62 | 62 | 61 | 61 | 60 | 60 | 58 | 57 | 56 | 54 | 53 | 51 | 49 |
| Oppressive (%) | 22 | 22 | 23 | 23 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 38 | 39 | 41 | 43 | 44 | 46 | 48 |
| Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|
| 1 | 10 | 68 | 22 |
| 2 | 11 | 67 | 22 |
| 3 | 11 | 66 | 23 |
| 4 | 12 | 65 | 23 |
| 5 | 12 | 64 | 24 |
| 6 | 12 | 64 | 24 |
| 7 | 13 | 63 | 24 |
| 8 | 12 | 63 | 25 |
| 9 | 12 | 63 | 25 |
| 10 | 12 | 63 | 25 |
| 11 | 12 | 63 | 25 |
| 12 | 12 | 63 | 25 |
| 13 | 11 | 63 | 26 |
| 14 | 11 | 63 | 26 |
| 15 | 10 | 63 | 27 |
| 16 | 10 | 62 | 28 |
| 17 | 9 | 62 | 29 |
| 18 | 8 | 62 | 30 |
| 19 | 7 | 62 | 31 |
| 20 | 6 | 62 | 32 |
| 21 | 6 | 61 | 33 |
| 22 | 5 | 61 | 34 |
| 23 | 5 | 60 | 35 |
| 24 | 4 | 60 | 36 |
| 25 | 4 | 58 | 38 |
| 26 | 4 | 57 | 39 |
| 27 | 3 | 56 | 41 |
| 28 | 3 | 54 | 43 |
| 29 | 3 | 53 | 44 |
| 30 | 3 | 51 | 46 |
| 31 | 3 | 49 | 48 |
Wind in March
Winds average 25 km/h in March.
Across March, daily wind ranges from about 24 km/h on the calmest days to 26 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) | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 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 | breezy |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 26 | breezy |
| 2 | 26 | breezy |
| 3 | 26 | breezy |
| 4 | 26 | breezy |
| 5 | 26 | breezy |
| 6 | 26 | breezy |
| 7 | 26 | breezy |
| 8 | 26 | breezy |
| 9 | 26 | breezy |
| 10 | 26 | breezy |
| 11 | 26 | breezy |
| 12 | 25 | breezy |
| 13 | 25 | breezy |
| 14 | 25 | breezy |
| 15 | 25 | breezy |
| 16 | 25 | breezy |
| 17 | 25 | breezy |
| 18 | 25 | breezy |
| 19 | 25 | breezy |
| 20 | 25 | breezy |
| 21 | 25 | breezy |
| 22 | 25 | 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 |
| 31 | 24 | breezy |
Sunrise & sunset in March
Daylight runs from about 11 h 36 min at the start of March to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 30 minutes over March. Sunrise moves from 6:31 AM to 6:09 AM, and sunset from 6:10 PM to 6:16 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) | 11.6 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.7 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 |
| Sunrise (AM) | 6:31 | 6:31 | 6:30 | 6:29 | 6:29 | 6:28 | 6:27 | 6:27 | 6:26 | 6:25 | 6:24 | 6:24 | 6:23 | 6:22 | 6:21 | 6:21 | 6:20 | 6:19 | 6:18 | 6:17 | 6:17 | 6:16 | 6:15 | 6:14 | 6:13 | 6:13 | 6:12 | 6:11 | 6:10 | 6:09 | 6:09 |
| Sunset (PM) | 6:10 | 6:10 | 6:10 | 6:11 | 6:11 | 6:11 | 6:11 | 6:12 | 6:12 | 6:12 | 6:12 | 6:13 | 6:13 | 6:13 | 6:13 | 6:13 | 6:14 | 6:14 | 6:14 | 6:14 | 6:14 | 6:15 | 6:15 | 6:15 | 6:15 | 6:15 | 6:15 | 6:16 | 6:16 | 6:16 | 6:16 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.6 | 6:31 | 6:10 |
| 2 | 11.7 | 6:31 | 6:10 |
| 3 | 11.7 | 6:30 | 6:10 |
| 4 | 11.7 | 6:29 | 6:11 |
| 5 | 11.7 | 6:29 | 6:11 |
| 6 | 11.7 | 6:28 | 6:11 |
| 7 | 11.7 | 6:27 | 6:11 |
| 8 | 11.7 | 6:27 | 6:12 |
| 9 | 11.8 | 6:26 | 6:12 |
| 10 | 11.8 | 6:25 | 6:12 |
| 11 | 11.8 | 6:24 | 6:12 |
| 12 | 11.8 | 6:24 | 6:13 |
| 13 | 11.8 | 6:23 | 6:13 |
| 14 | 11.8 | 6:22 | 6:13 |
| 15 | 11.9 | 6:21 | 6:13 |
| 16 | 11.9 | 6:21 | 6:13 |
| 17 | 11.9 | 6:20 | 6:14 |
| 18 | 11.9 | 6:19 | 6:14 |
| 19 | 11.9 | 6:18 | 6:14 |
| 20 | 11.9 | 6:17 | 6:14 |
| 21 | 12.0 | 6:17 | 6:14 |
| 22 | 12.0 | 6:16 | 6:15 |
| 23 | 12.0 | 6:15 | 6:15 |
| 24 | 12.0 | 6:14 | 6:15 |
| 25 | 12.0 | 6:13 | 6:15 |
| 26 | 12.0 | 6:13 | 6:15 |
| 27 | 12.1 | 6:12 | 6:15 |
| 28 | 12.1 | 6:11 | 6:16 |
| 29 | 12.1 | 6:10 | 6:16 |
| 30 | 12.1 | 6:09 | 6:16 |
| 31 | 12.1 | 6:09 | 6:16 |
Solar energy in March
Average shortwave solar energy reaching the ground each day in March, about 6.33 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 — March's 6.33 kWh/m² falls in the middle.
| 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) | 6.0 | 6.0 | 6.0 | 6.0 | 6.1 | 6.1 | 6.1 | 6.2 | 6.2 | 6.2 | 6.2 | 6.3 | 6.3 | 6.3 | 6.3 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.6 | 6.6 | 6.6 |
| Level | Bright | 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 | 6.0 | Bright |
| 2 | 6.0 | Intense |
| 3 | 6.0 | Intense |
| 4 | 6.0 | Intense |
| 5 | 6.1 | Intense |
| 6 | 6.1 | Intense |
| 7 | 6.1 | Intense |
| 8 | 6.2 | Intense |
| 9 | 6.2 | Intense |
| 10 | 6.2 | Intense |
| 11 | 6.2 | Intense |
| 12 | 6.3 | Intense |
| 13 | 6.3 | Intense |
| 14 | 6.3 | Intense |
| 15 | 6.3 | Intense |
| 16 | 6.4 | Intense |
| 17 | 6.4 | Intense |
| 18 | 6.4 | Intense |
| 19 | 6.4 | Intense |
| 20 | 6.4 | Intense |
| 21 | 6.5 | 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 | 6.6 | Intense |
| 30 | 6.6 | Intense |
| 31 | 6.6 | Intense |
Hazard calendar for St. John's
None of St. John's's seasonal hazards are active in March. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
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 March a good time to visit St. John's?
Our two travel scores rate March for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
March is one of the better times to visit St. John's for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for St. John's in March
From March's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In March, St. John's sees daytime highs around 25°C and nights near 24°C. Pack sun protection. Worth having: light clothes and a windbreaker. About 7 days see rain.
Sea temperature near St. John's in March
The nearest coast averages about 26°C in March — 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 March
Clear-sky midday UV in March 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 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 March
Average fine-particle pollution (PM2.5) through the year — so you can see where March 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).