When to go · Canada
When to go to St. John's
When to go
What the averages say
On these averages, St. John's has a mean high between 18°C and 32°C and under 150 mm of rain in August.
- Cold months (a mean high under 10°C): November to May.
- The warmest month is August (18°C) and the coolest February (0°C). The wettest is December (140 mm) and the driest June (86 mm); about 1,301 mm of rain falls in a year.
How these sentences are worded
Each sentence is written from the figures by fixed rules, and says no more than they do. Mild to warm: a mean daily high from 18°C up to 32°C. Hot: 32°C or more. Cool: 10°C up to 18°C. Cold: under 10°C. Dry: under 50 mm of rain in the month; wet: 150 mm or more. Humid: a high of 25°C or more with relative humidity of 70% or more. A month is described as good for going when it is mild to warm and not wet.
The year at a glance
- Mild to warm and dry
- Mild to warm, humid or showery
- Hot
- Cool
- Wet
- Cold
- JanCold
- FebCold
- MarCold
- AprCold
- MayCold
- JunCool
- JulCool
- AugMild–warm, mixed
- SeptCool
- OctCool
- NovCold
- DecCold
Month by month
Every month in St. John's
| Month | High | Low | Rain | Humidity | Cloud | Sunlight (kWh/m²/day) | High in Dubai | What it is like |
|---|---|---|---|---|---|---|---|---|
| January | 0°C | -4°C | 127 mm | 87% | 83% | 1 | 23°C | Cold |
| February | 0°C | -4°C | 105 mm | 87% | 81% | 1.7 | 24°C | Cold |
| March | 0°C | -3°C | 117 mm | 87% | 80% | 2.8 | 27°C | Cold |
| April | 3°C | 0°C | 90 mm | 88% | 77% | 4 | 31°C | Cold |
| May | 6°C | 2°C | 90 mm | 90% | 77% | 4.8 | 35°C | Cold |
| June | 10°C | 6°C | 86 mm | 90% | 77% | 5 | 37°C | Cool |
| July | 16°C | 12°C | 93 mm | 90% | 73% | 5 | 39°C | Cool |
| August | 18°C | 14°C | 90 mm | 88% | 72% | 4.3 | 39°C | Mild to warm, humid or showery |
| September | 15°C | 11°C | 104 mm | 86% | 69% | 3.4 | 37°C | Cool |
| October | 10°C | 7°C | 131 mm | 87% | 74% | 2.1 | 34°C | Cool |
| November | 6°C | 3°C | 128 mm | 86% | 77% | 1.2 | 29°C | Cold |
| December | 2°C | -1°C | 140 mm | 87% | 82% | 0.8 | 25°C | Cold |
The Dubai column is Dubai's mean daily high, for comparison.
Modelled averages for an area about 50 km across, not a weather station's record: NASA POWER climatology, 2001–2020. These data were obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program.
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