Climate averages 1991–2020
Terni weather
in August.
A hot, fairly dry month: the warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Terni: daytime highs average 31.6°C and nights cool to about 19.0°C. By daytime temperature it is the warmest month of the year.
Expect about 33 mm of rain on roughly 6 days, which makes August a fairly dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 55 min on an average August day.
The nearest other city in this atlas is Guidonia Montecelio (64 km away). In August its highs average 31.5°C, about as warm as Terni, with 28 mm of rain.
Among the 79 cities listed in Italy, Terni ranks 4th of 79 for the warmest August highs and joint 33rd of 79 for the driest August (rainfall, lowest first). The mean August high of those 79 cities is 29.1°C; Terni is 2.6°C warmer than that mean.
From August to September, average highs fall by 6.0°C to 25.6°C, and monthly rainfall rises from 33 mm to 81 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Terni climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 10.5°C2.2°C | 2.2°C | 71 | 9.5 | 9.49 h |
| February | 11.6°C2.2°C | 2.2°C | 82 | 10.0 | 10.511 h |
| March | 15.0°C4.5°C | 4.5°C | 92 | 10.8 | 11.912 h |
| April | 18.4°C7.4°C | 7.4°C | 98 | 13.0 | 13.313 h |
| May | 22.9°C11.4°C | 11.4°C | 83 | 11.3 | 14.615 h |
| June | 27.8°C15.5°C | 15.5°C | 53 | 8.7 | 15.215 h |
| July | 31.4°C18.5°C | 18.5°C | 30 | 5.7 | 15.015 h |
| August, selected | 31.6°C19.0°C | 19.0°C | 33 | 6.1 | 13.914 h |
| September | 25.6°C15.0°C | 15.0°C | 81 | 9.4 | 12.513 h |
| October | 20.7°C11.5°C | 11.5°C | 105 | 10.5 | 11.111 h |
| November | 15.3°C7.2°C | 7.2°C | 129 | 12.4 | 9.810 h |
| December | 11.1°C3.2°C | 3.2°C | 107 | 10.7 | 9.19 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Guidonia Montecelio in AugustItaly · 64 kmHigh 31.5°C · Low 19.0°C · 28 mm rain
- Perugia in AugustItaly · 64 kmHigh 28.4°C · Low 16.6°C · 38 mm rain
- Rome in AugustItaly · 75 kmHigh 30.4°C · Low 20.0°C · 22 mm rain
- Acilia-Castel Fusano-Ostia Antica in AugustItaly · 93 kmHigh 28.3°C · Low 21.8°C · 21 mm rain
- Fiumicino in AugustItaly · 94 kmHigh 27.9°C · Low 22.0°C · 21 mm rain
- Aprilia in AugustItaly · 108 kmHigh 28.8°C · Low 20.9°C · 22 mm rain
- Arezzo in AugustItaly · 118 kmHigh 29.5°C · Low 18.6°C · 43 mm rain
- Latina in AugustItaly · 124 kmHigh 29.6°C · Low 20.8°C · 24 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Terni) is explained once on the Terni year overview and on the Sources, method and limits page.