Climate averages 1991–2020
Guidonia Montecelio weather
in April.
A mild, wet month: the 7th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a mild month in Guidonia Montecelio: daytime highs average 18.4°C and nights cool to about 7.4°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 94 mm of rain on roughly 12 days, which makes April a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 19 min on an average April day.
The nearest other city in this atlas is Rome (21 km away). In April its highs average 17.9°C, about as warm as Guidonia Montecelio, with 77 mm of rain.
Among the 79 cities listed in Italy, Guidonia Montecelio ranks joint 10th of 79 for the warmest April highs and joint 54th of 79 for the driest April (rainfall, lowest first). The mean April high of those 79 cities is 17.4°C; Guidonia Montecelio is 1.0°C warmer than that mean.
From April to May, average highs rise by 4.5°C to 22.9°C, and monthly rainfall falls from 94 mm to 77 mm.
The annual picture
April 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
Guidonia Montecelio climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 11.1°C2.0°C | 2.0°C | 69 | 8.5 | 9.59 h |
| February | 12.1°C2.1°C | 2.1°C | 77 | 9.4 | 10.611 h |
| March | 15.2°C4.5°C | 4.5°C | 84 | 9.9 | 11.912 h |
| April, selected | 18.4°C7.4°C | 7.4°C | 94 | 12.2 | 13.313 h |
| May | 22.9°C11.5°C | 11.5°C | 77 | 10.3 | 14.515 h |
| June | 27.7°C15.5°C | 15.5°C | 46 | 7.3 | 15.215 h |
| July | 31.1°C18.4°C | 18.4°C | 28 | 4.8 | 14.915 h |
| August | 31.5°C19.0°C | 19.0°C | 28 | 5.5 | 13.914 h |
| September | 25.7°C15.3°C | 15.3°C | 85 | 9.4 | 12.513 h |
| October | 20.9°C11.6°C | 11.6°C | 113 | 10.4 | 11.111 h |
| November | 15.8°C7.4°C | 7.4°C | 132 | 12.4 | 9.910 h |
| December | 11.9°C3.3°C | 3.3°C | 104 | 10.3 | 9.29 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
April in nearby cities
- Rome in AprilItaly · 21 kmHigh 17.9°C · Low 8.5°C · 77 mm rain
- Acilia-Castel Fusano-Ostia Antica in AprilItaly · 41 kmHigh 16.9°C · Low 10.6°C · 61 mm rain
- Aprilia in AprilItaly · 45 kmHigh 17.0°C · Low 9.5°C · 74 mm rain
- Fiumicino in AprilItaly · 47 kmHigh 16.7°C · Low 10.9°C · 61 mm rain
- Latina in AprilItaly · 61 kmHigh 17.6°C · Low 9.2°C · 85 mm rain
- Terni in AprilItaly · 64 kmHigh 18.4°C · Low 7.4°C · 98 mm rain
- Perugia in AprilItaly · 127 kmHigh 15.6°C · Low 5.1°C · 79 mm rain
- Pescara in AprilItaly · 132 kmHigh 17.1°C · Low 8.8°C · 62 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 Guidonia Montecelio) is explained once on the Guidonia Montecelio year overview and on the Sources, method and limits page.