The most comfortable time to visit Saint John’s is from late January to early March. For sun, any time of year works.
When to go five ratings · thirty-six ten-day sections · click a cell to read it
For sun, Saint John’s rates Good or better for 34 of the year’s 36 ten-day sections, about eleven and a half months in all. It is at its best in early December, at 79. The clearest skies come in February, when the sky is typically 51% covered at midday (partly cloudy).
The being outside season here runs from late January to early March. It peaks in mid February, at 63. The weakest stretch is from mid July to October, when it drops to 1, mostly because it is too hot.
Walking is not what Saint John’s is for: the Active outdoors rating tops out at 13, mostly because it is too warm.
The year, measured
The average temperature in Saint John’s over the whole year is 27°C. August is the hottest month, with highs of about 30°C; February is the coldest, with lows of about 24°C. Saint John’s has no sharply defined rainy season: the chance of rain on a given day runs from 19% in June, the driest month, to 30% in September, the wettest. Winds in Saint John’s are highest in July, averaging 4.7 m/s (17 km/h), and lightest in October, at 2.9 m/s (10 km/h). The prevailing wind is from the E. The clearest skies in Saint John’s come in October, when the sky is typically 47% covered; July is the cloudiest month, at 54%.
Month by month Saint John’s climate by month: average temperatures year round · click a month to read it
| Month | High | Low | Feels like | Chance of rain | Cloud | Wind | Being outside | Sun | Walking |
|---|---|---|---|---|---|---|---|---|---|
| January | 27°C | 24°C | 27°C | 23% | 51% | 3.9 m/s | 52 | 72 | 7 |
| February | 27°C | 24°C | 27°C | 24% | 51% | 4.3 m/s | 58 | 70 | 10 |
| March | 27°C | 24°C | 27°C | 23% | 50% | 4.1 m/s | 51 | 74 | 6 |
| April | 28°C | 24°C | 28°C | 23% | 53% | 4.0 m/s | 38 | 74 | 4 |
| May | 29°C | 26°C | 30°C | 20% | 54% | 4.1 m/s | 17 | 76 | 1 |
| June | 29°C | 26°C | 31°C | 19% | 51% | 4.5 m/s | 9 | 73 | 1 |
| July | 30°C | 27°C | 31°C | 25% | 54% | 4.7 m/s | 6 | 70 | 0 |
| August | 30°C | 27°C | 32°C | 26% | 50% | 4.0 m/s | 3 | 64 | 0 |
| September | 30°C | 26°C | 32°C | 30% | 49% | 3.0 m/s | 2 | 53 | 1 |
| October | 29°C | 26°C | 32°C | 27% | 47% | 2.9 m/s | 3 | 62 | 1 |
| November | 29°C | 25°C | 31°C | 26% | 51% | 3.2 m/s | 10 | 72 | 1 |
| December | 28°C | 25°C | 29°C | 26% | 50% | 3.7 m/s | 32 | 77 | 3 |
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Saint John’s weather by season
Year round, Saint John’s has days of about 27°C at their warmest in January, its coolest month, and 30°C in August, its warmest; the coolest hours of the day run from 24°C to 27°C through the year, and the average temperature over the year is 27°C around the clock. Rain is most likely around September and least likely around June. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Saint John’s weather in winterDecember to February
Winter in Saint John’s has typical daily highs of about 27°C and lows of about 24°C, with a 24% chance of rain on a given day.
Saint John’s weather in springMarch to May
Spring in Saint John’s has typical daily highs of about 28°C and lows of about 25°C, with a 22% chance of rain on a given day.
Saint John’s weather in summerJune to August
Summer in Saint John’s has typical daily highs of about 30°C and lows of about 27°C, with a 24% chance of rain on a given day.
Saint John’s weather in autumnSeptember to November
Autumn in Saint John’s has typical daily highs of about 29°C and lows of about 26°C, with a 27% chance of rain on a given day.
When is the rainy season in Saint John’s?
Saint John’s has no sharply defined rainy season: the chance of rain on a given day runs from 19% in June, the driest month, to 30% in September, the wettest.
What time of year is Saint John’s windiest?
Winds in Saint John’s are highest in July, averaging 4.7 m/s (17 km/h), and lightest in October, at 2.9 m/s (10 km/h). The prevailing wind is from the E.
What is the average temperature in Saint John’s year round?
The average temperature in Saint John’s over the whole year is 27°C. August is the hottest month, with highs of about 30°C; February is the coldest, with lows of about 24°C.
Where to go instead in early September, the weakest time here for being outside
How this is worked out
Every figure is a decade of weather-station observations blended into one typical year, in ten-day sections. The ratings, the chart and the feels-like column are read at midday local solar time. Being outside is the Easy outdoors rating, Sun is Sunbathing and Walking is Active outdoors, each out of 100: Good from 55, Ideal from 80. They describe what a time of year is usually like here, not a forecast. The dotted links open the map at that time of year; set its time of day to midday to see these numbers.