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Terni Weather by Month
Average temperatures, rainfall and humidity for Terni, Italy, month by month, built from OpenWeather's historical records. Use it to see what a typical Terni month looks like before you travel — then check the live Terni forecast for the days ahead.
Warmest month
July
33°C average high
Coolest month
January
2°C average low
Wettest month
September
109 mm of rain
Driest month
July
37 mm of rain
Average temperature and rainfall in Terni by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 11°C | 2°C | -17°C / 19°C | 76 mm | 81% | 10 km/h |
| February | 12°C | 3°C | -19°C / 21°C | 82 mm | 76% | 9 km/h |
| March | 15°C | 4°C | -8°C / 24°C | 85 mm | 72% | 9 km/h |
| April | 19°C | 6°C | -6°C / 30°C | 91 mm | 68% | 8 km/h |
| May | 23°C | 10°C | 1°C / 36°C | 72 mm | 69% | 8 km/h |
| June | 29°C | 15°C | 5°C / 45°C | 65 mm | 63% | 7 km/h |
| July | 33°C | 18°C | 6°C / 46°C | 37 mm | 58% | 7 km/h |
| August | 32°C | 18°C | 10°C / 42°C | 44 mm | 60% | 7 km/h |
| September | 26°C | 14°C | 2°C / 34°C | 109 mm | 69% | 7 km/h |
| October | 21°C | 10°C | 0°C / 33°C | 81 mm | 76% | 7 km/h |
| November | 16°C | 7°C | -7°C / 26°C | 98 mm | 82% | 8 km/h |
| December | 12°C | 3°C | -9°C / 21°C | 70 mm | 79% | 9 km/h |
Best time to visit Terni
The most comfortable time to visit Terni is generally May and September to October, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around September, totalling about 910 mm a year.
Travellers who prefer heat should aim for July, when highs average 33°C. September is the month to avoid if rain would spoil your plans — it averages 109 mm, roughly 3× the rainfall of July.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Terni forecast for what is happening now.