Climate averages 1991–2020
Terni weather
in January.
A cool, moderately wet month: the coolest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a cool month in Terni: daytime highs average 10.5°C and nights cool to about 2.2°C. By daytime temperature it is the coolest month of the year.
Expect about 71 mm of rain on roughly 10 days, which makes January a moderately wet month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 27 min on an average January day.
The nearest other city in this atlas is Guidonia Montecelio (64 km away). In January its highs average 11.1°C, 0.6°C warmer than Terni, with 69 mm of rain.
Among the 79 cities listed in Italy, Terni ranks 34th of 79 for the warmest January highs and joint 52nd of 79 for the driest January (rainfall, lowest first). The mean January high of those 79 cities is 9.7°C; Terni is 0.8°C warmer than that mean.
From January to February, average highs rise by 1.1°C to 11.6°C, and monthly rainfall rises from 71 mm to 82 mm.
The annual picture
January 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, selected | 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 | 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
January in nearby cities
- Guidonia Montecelio in JanuaryItaly · 64 kmHigh 11.1°C · Low 2.0°C · 69 mm rain
- Perugia in JanuaryItaly · 64 kmHigh 7.2°C · Low -0.3°C · 57 mm rain
- Rome in JanuaryItaly · 75 kmHigh 11.5°C · Low 3.7°C · 63 mm rain
- Acilia-Castel Fusano-Ostia Antica in JanuaryItaly · 93 kmHigh 12.0°C · Low 6.5°C · 81 mm rain
- Fiumicino in JanuaryItaly · 94 kmHigh 12.0°C · Low 6.9°C · 81 mm rain
- Aprilia in JanuaryItaly · 108 kmHigh 11.6°C · Low 5.0°C · 86 mm rain
- Arezzo in JanuaryItaly · 118 kmHigh 8.5°C · Low 1.5°C · 69 mm rain
- Latina in JanuaryItaly · 124 kmHigh 11.8°C · Low 4.4°C · 81 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.