15-Day Weather Forecast - St Johns
15-day weather forecast for St Johns: temperatures from 4°C (39°F) to 30°C (86°F). Average daily high 20°C (68°F) over the next 15 days.
Hourly Forecast by Day
15-Day Temperature Trend
15-Day Weather Forecast
Updated just nowWeather Insight
St Johns's 15-day outlook ranges from a low of 4°C to a high of 30°C, with an average daytime high near 20°C. That's 2° above the long-term average high of 18°C for this time of year. It continues a recent pattern — 22 of the last 28 days with published data have run warmer than normal. Air quality is currently good (AQI 26), with no notable outdoor health concerns.
Today vs Normal
The long-term average high for today is 18°C.
22 of the last 28 days with published data ran above normal.
It continues that pattern - today's forecast is also running above normal.
Red = above normal, blue = at or below · last 12 days
Air Quality
Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.
Extended Outlook for St Johns
Over the next 15 days, St Johns is forecast to see temperatures ranging from 3°C to 30°C, averaging a daily high of 20°C. The extended outlook indicates significant rainfall totalling 37 mm spread across 7 days. Conditions are suitable for most outdoor activities; carry an umbrella on days with showers.