15-Day Weather Forecast - Londonderry
15-day weather forecast for Londonderry: temperatures from 9°C (48°F) to 18°C (64°F). Average daily high 15°C (59°F) over the next 15 days.
Hourly Forecast by Day
15-Day Temperature Trend
15-Day Weather Forecast
Updated just nowWeather Insight
Londonderry's 15-day outlook ranges from a low of 9°C to a high of 18°C, with an average daytime high near 15°C. Air quality is currently Moderate (AQI 52), driven mainly by PM2.5 at 9.5 μg/m³.
Today vs Normal
The long-term average high for today is 15°C.
9 of the last 19 days with published data ran above normal.
That's a break from the pattern - today's forecast runs above normal even though the recent stretch mostly ran below.
Red = above normal, blue = at or below · last 12 days
Air Quality
Air quality is acceptable for most people. Unusually sensitive individuals should consider reducing prolonged or heavy outdoor exertion.
Extended Outlook for Londonderry
Over the next 15 days, Londonderry is forecast to see temperatures ranging from 8°C to 19°C, averaging a daily high of 15°C. The extended outlook indicates significant rainfall totalling 61.3 mm spread across 14 days. Conditions are suitable for most outdoor activities; carry an umbrella on days with showers.