Guidonia weather in August
In August, Guidonia sees average daytime highs of 30°C and overnight lows near 18°C, with 28 mm of rain across 5.5 wet days and about 13.7 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.
Highs ease over the month, from about 31°C in the first days to 29°C by the end. The sky is clear or mostly clear about 75% of the time in August, and the air most often feels humid.
Daylight stretches from about 14 h 18 min at the start of August to 13 hours by month's end. Set against the rest of the year, August is Guidonia's 2nd-clearest and 12th-windiest month. For the whole year in context, see Guidonia's year-round climate.
- Daytime high
- 30°
- 1st warmest
- Overnight low
- 18°
- 12th coldest
- Rainfall
- 28 mm
- 5.5 wet days
- Daylight
- 13 h 42 min
- 5:22 AM – 7:05 PM
- Cloud cover
- 26%
- 2nd clearest
- Wind
- 6 km/h
- 12th windiest
- Solar energy
- 6.16 kWh/m²
- Travel score
- 5.8
- out of 10
Guidonia is human settlement in Italy.
- Air quality
- Moderate
- PM2.5 12.7 µg/m³ · 2019
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in August
Highs ease over the month, from about 31°C in the first days to 29°C by the end.
A typical August day in Guidonia reaches about 30°C in the afternoon and slips back to 18°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 34°C. Set against its neighbours, August runs on par with July and about 5°C warmer than September.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 28 | 28 |
| Avg low (°C) | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 31 | 19 |
| 2 | 31 | 19 |
| 3 | 31 | 19 |
| 4 | 31 | 19 |
| 5 | 31 | 19 |
| 6 | 31 | 19 |
| 7 | 31 | 19 |
| 8 | 31 | 19 |
| 9 | 31 | 19 |
| 10 | 31 | 19 |
| 11 | 31 | 19 |
| 12 | 31 | 19 |
| 13 | 31 | 19 |
| 14 | 31 | 19 |
| 15 | 31 | 19 |
| 16 | 31 | 19 |
| 17 | 31 | 18 |
| 18 | 30 | 18 |
| 19 | 30 | 18 |
| 20 | 30 | 18 |
| 21 | 30 | 18 |
| 22 | 30 | 18 |
| 23 | 30 | 18 |
| 24 | 30 | 18 |
| 25 | 30 | 18 |
| 26 | 29 | 18 |
| 27 | 29 | 18 |
| 28 | 29 | 17 |
| 29 | 29 | 17 |
| 30 | 28 | 17 |
| 31 | 28 | 17 |
How August really feels in Guidonia
Once humidity and wind are folded in, August averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Guidonia weather by month
How August compares with the rest of the year at a glance. August is the 1st-warmest and 11th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 10° / 2° | 69 | 8.6 | 0.6 | 9.3 | 2.6 |
| Feb | 12° / 2° | 76 | 9.3 | 0.9 | 10.3 | 3.0 |
| Mar | 15° / 5° | 84 | 9.9 | 0.5 | 11.7 | 4.5 |
| Apr | 18° / 7° | 94 | 12.2 | 0.1 | 13.1 | 5.5 |
| May | 22° / 11° | 77 | 10.4 | 0 | 14.3 | 6.8 |
| Jun | 27° / 15° | 46 | 7.3 | 0 | 15 | 7.1 |
| Jul | 30° / 18° | 28 | 4.8 | 0 | 14.7 | 6.1 |
| Aug | 30° / 18° | 28 | 5.5 | 0 | 13.7 | 5.8 |
| Sep | 25° / 15° | 85 | 9.4 | 0 | 12.3 | 7.1 |
| Oct | 21° / 11° | 113 | 10.4 | 0 | 10.9 | 6.5 |
| Nov | 15° / 7° | 132 | 12.4 | 0 | 9.6 | 4.5 |
| Dec | 11° / 3° | 104 | 10.4 | 0.3 | 9 | 2.9 |
Cloud cover in August
The sky is clear or mostly clear about 75% of the time in August.
Beyond those clear spells, partly cloudy skies cover about 14% of August, with mostly cloudy or overcast conditions the remaining 11%. Skies tend to cloud over as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 91 | 91 | 91 | 91 | 91 | 91 | 91 | 91 | 91 | 91 | 91 | 91 | 91 | 90 | 90 | 90 | 90 | 90 | 90 | 89 | 89 | 89 | 89 | 88 | 87 | 86 | 86 | 86 | 84 | 84 | 83 |
| Cloudier (%) | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 11 | 12 | 13 | 14 | 14 | 14 | 16 | 16 | 17 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 91 | 9 |
| 2 | 91 | 9 |
| 3 | 91 | 9 |
| 4 | 91 | 9 |
| 5 | 91 | 9 |
| 6 | 91 | 9 |
| 7 | 91 | 9 |
| 8 | 91 | 9 |
| 9 | 91 | 9 |
| 10 | 91 | 9 |
| 11 | 91 | 9 |
| 12 | 91 | 9 |
| 13 | 91 | 9 |
| 14 | 90 | 10 |
| 15 | 90 | 10 |
| 16 | 90 | 10 |
| 17 | 90 | 10 |
| 18 | 90 | 10 |
| 19 | 90 | 10 |
| 20 | 89 | 11 |
| 21 | 89 | 11 |
| 22 | 89 | 11 |
| 23 | 89 | 11 |
| 24 | 88 | 12 |
| 25 | 87 | 13 |
| 26 | 86 | 14 |
| 27 | 86 | 14 |
| 28 | 86 | 14 |
| 29 | 84 | 16 |
| 30 | 84 | 16 |
| 31 | 83 | 17 |
Chance of precipitation in August
Guidonia gets around 28 mm of rain over 5.5 wet days in August. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 19% and peaks near 27% on the wettest days. The odds climb toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 18 | 18 | 19 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 26 | 27 |
| Rain chance (%) | |
|---|---|
| 1 | 16 |
| 2 | 16 |
| 3 | 16 |
| 4 | 16 |
| 5 | 16 |
| 6 | 16 |
| 7 | 16 |
| 8 | 16 |
| 9 | 16 |
| 10 | 16 |
| 11 | 16 |
| 12 | 16 |
| 13 | 16 |
| 14 | 16 |
| 15 | 16 |
| 16 | 17 |
| 17 | 17 |
| 18 | 17 |
| 19 | 18 |
| 20 | 18 |
| 21 | 19 |
| 22 | 19 |
| 23 | 20 |
| 24 | 21 |
| 25 | 22 |
| 26 | 23 |
| 27 | 24 |
| 28 | 25 |
| 29 | 26 |
| 30 | 26 |
| 31 | 27 |
Humidity in August
Most of August feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, August lands in the humid band about 47% of days. Sticky, muggy-or-worse air turns up on roughly 11% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 10 | 11 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| Comfortable (%) | 31 | 32 | 32 | 32 | 32 | 32 | 33 | 33 | 33 | 33 | 33 | 34 | 34 | 34 | 34 | 33 | 33 | 32 | 32 | 31 | 31 | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 30 | 31 | 32 |
| Humid (%) | 46 | 46 | 46 | 45 | 45 | 45 | 44 | 44 | 44 | 45 | 45 | 45 | 46 | 47 | 47 | 48 | 49 | 49 | 50 | 51 | 51 | 51 | 50 | 51 | 50 | 49 | 48 | 46 | 45 | 43 | 42 |
| Muggy (%) | 14 | 14 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 13 | 13 | 12 | 11 | 11 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 8 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| 1 | 8 | 31 | 46 | 14 |
| 2 | 8 | 32 | 46 | 14 |
| 3 | 8 | 32 | 46 | 15 |
| 4 | 8 | 32 | 45 | 15 |
| 5 | 8 | 32 | 45 | 15 |
| 6 | 8 | 32 | 45 | 15 |
| 7 | 8 | 33 | 44 | 15 |
| 8 | 8 | 33 | 44 | 14 |
| 9 | 8 | 33 | 44 | 14 |
| 10 | 8 | 33 | 45 | 14 |
| 11 | 8 | 33 | 45 | 13 |
| 12 | 8 | 34 | 45 | 13 |
| 13 | 8 | 34 | 46 | 12 |
| 14 | 8 | 34 | 47 | 11 |
| 15 | 8 | 34 | 47 | 11 |
| 16 | 8 | 33 | 48 | 10 |
| 17 | 8 | 33 | 49 | 10 |
| 18 | 9 | 32 | 49 | 10 |
| 19 | 9 | 32 | 50 | 9 |
| 20 | 9 | 31 | 51 | 9 |
| 21 | 9 | 31 | 51 | 9 |
| 22 | 10 | 30 | 51 | 9 |
| 23 | 11 | 30 | 50 | 9 |
| 24 | 11 | 29 | 51 | 9 |
| 25 | 12 | 29 | 50 | 9 |
| 26 | 13 | 29 | 49 | 9 |
| 27 | 14 | 29 | 48 | 9 |
| 28 | 15 | 29 | 46 | 9 |
| 29 | 16 | 30 | 45 | 9 |
| 30 | 17 | 31 | 43 | 9 |
| 31 | 18 | 32 | 42 | 8 |
Wind in August
Winds average 6 km/h in August, the calmest month.
Across August, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 6 | calm |
| 2 | 6 | calm |
| 3 | 6 | calm |
| 4 | 6 | calm |
| 5 | 6 | calm |
| 6 | 6 | calm |
| 7 | 6 | calm |
| 8 | 6 | calm |
| 9 | 6 | calm |
| 10 | 6 | calm |
| 11 | 6 | calm |
| 12 | 6 | calm |
| 13 | 6 | calm |
| 14 | 6 | calm |
| 15 | 6 | calm |
| 16 | 6 | calm |
| 17 | 6 | calm |
| 18 | 6 | calm |
| 19 | 6 | calm |
| 20 | 6 | calm |
| 21 | 6 | calm |
| 22 | 6 | calm |
| 23 | 6 | calm |
| 24 | 6 | calm |
| 25 | 6 | calm |
| 26 | 6 | calm |
| 27 | 6 | calm |
| 28 | 6 | calm |
| 29 | 6 | calm |
| 30 | 6 | calm |
| 31 | 6 | calm |
Sunrise & sunset in August
Daylight runs from about 14 h 18 min at the start of August to 13 hours by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 78 minutes over August. Sunrise moves from 5:06 AM to 5:38 AM, and sunset from 7:24 PM to 6:40 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 14.3 | 14.3 | 14.2 | 14.2 | 14.2 | 14.1 | 14.1 | 14.0 | 14.0 | 14.0 | 13.9 | 13.9 | 13.8 | 13.8 | 13.8 | 13.7 | 13.7 | 13.6 | 13.6 | 13.5 | 13.5 | 13.4 | 13.4 | 13.4 | 13.3 | 13.3 | 13.2 | 13.2 | 13.1 | 13.1 | 13.0 |
| Sunrise (AM) | 5:06 | 5:07 | 5:08 | 5:09 | 5:10 | 5:11 | 5:12 | 5:13 | 5:14 | 5:16 | 5:17 | 5:18 | 5:19 | 5:20 | 5:21 | 5:22 | 5:23 | 5:24 | 5:25 | 5:26 | 5:27 | 5:28 | 5:29 | 5:30 | 5:32 | 5:33 | 5:34 | 5:35 | 5:36 | 5:37 | 5:38 |
| Sunset (PM) | 7:24 | 7:23 | 7:22 | 7:21 | 7:19 | 7:18 | 7:17 | 7:16 | 7:14 | 7:13 | 7:12 | 7:10 | 7:09 | 7:07 | 7:06 | 7:05 | 7:03 | 7:02 | 7:00 | 6:58 | 6:57 | 6:55 | 6:54 | 6:52 | 6:50 | 6:49 | 6:47 | 6:45 | 6:44 | 6:42 | 6:40 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 14.3 | 5:06 | 7:24 |
| 2 | 14.3 | 5:07 | 7:23 |
| 3 | 14.2 | 5:08 | 7:22 |
| 4 | 14.2 | 5:09 | 7:21 |
| 5 | 14.2 | 5:10 | 7:19 |
| 6 | 14.1 | 5:11 | 7:18 |
| 7 | 14.1 | 5:12 | 7:17 |
| 8 | 14.0 | 5:13 | 7:16 |
| 9 | 14.0 | 5:14 | 7:14 |
| 10 | 14.0 | 5:16 | 7:13 |
| 11 | 13.9 | 5:17 | 7:12 |
| 12 | 13.9 | 5:18 | 7:10 |
| 13 | 13.8 | 5:19 | 7:09 |
| 14 | 13.8 | 5:20 | 7:07 |
| 15 | 13.8 | 5:21 | 7:06 |
| 16 | 13.7 | 5:22 | 7:05 |
| 17 | 13.7 | 5:23 | 7:03 |
| 18 | 13.6 | 5:24 | 7:02 |
| 19 | 13.6 | 5:25 | 7:00 |
| 20 | 13.5 | 5:26 | 6:58 |
| 21 | 13.5 | 5:27 | 6:57 |
| 22 | 13.4 | 5:28 | 6:55 |
| 23 | 13.4 | 5:29 | 6:54 |
| 24 | 13.4 | 5:30 | 6:52 |
| 25 | 13.3 | 5:32 | 6:50 |
| 26 | 13.3 | 5:33 | 6:49 |
| 27 | 13.2 | 5:34 | 6:47 |
| 28 | 13.2 | 5:35 | 6:45 |
| 29 | 13.1 | 5:36 | 6:44 |
| 30 | 13.1 | 5:37 | 6:42 |
| 31 | 13.0 | 5:38 | 6:40 |
Solar energy in August
Average shortwave solar energy reaching the ground each day in August, about 6.16 kWh/m².
For context, solar energy here swings from a low near 1.61 kWh/m² to a high of 7 kWh/m² in July across the year — August's 6.16 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.7 | 6.7 | 6.6 | 6.6 | 6.6 | 6.5 | 6.5 | 6.5 | 6.4 | 6.4 | 6.4 | 6.3 | 6.3 | 6.3 | 6.2 | 6.2 | 6.1 | 6.1 | 6.0 | 6.0 | 6.0 | 5.9 | 5.8 | 5.8 | 5.7 | 5.7 | 5.6 | 5.6 | 5.5 | 5.4 | 5.4 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.7 | Intense |
| 2 | 6.7 | Intense |
| 3 | 6.6 | Intense |
| 4 | 6.6 | Intense |
| 5 | 6.6 | Intense |
| 6 | 6.5 | Intense |
| 7 | 6.5 | Intense |
| 8 | 6.5 | Intense |
| 9 | 6.4 | Intense |
| 10 | 6.4 | Intense |
| 11 | 6.4 | Intense |
| 12 | 6.3 | Intense |
| 13 | 6.3 | Intense |
| 14 | 6.3 | Intense |
| 15 | 6.2 | Intense |
| 16 | 6.2 | Intense |
| 17 | 6.1 | Intense |
| 18 | 6.1 | Intense |
| 19 | 6.0 | Intense |
| 20 | 6.0 | Intense |
| 21 | 6.0 | Bright |
| 22 | 5.9 | Bright |
| 23 | 5.8 | Bright |
| 24 | 5.8 | Bright |
| 25 | 5.7 | Bright |
| 26 | 5.7 | Bright |
| 27 | 5.6 | Bright |
| 28 | 5.6 | Bright |
| 29 | 5.5 | Bright |
| 30 | 5.4 | Bright |
| 31 | 5.4 | Bright |
Is August a good time to visit Guidonia?
Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
August is a reasonable time to visit Guidonia for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Guidonia in August
From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In August, Guidonia sees daytime highs around 30°C and nights near 18°C. Pack light clothes and sun protection. About 6 days see rain.
Sea temperature near Guidonia in August
The nearest coast averages about 26°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 50 km away) is warmest in August at about 26°C and coldest in February near 14°C.
It's comfortable for a long swim from May 31 to Nov 1 — about 5.1 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 15 | 14 | 14 | 15 | 18 | 22 | 25 | 26 | 24 | 21 | 19 | 16 |
| Comfort | Bracing | Bracing | Bracing | Cool | Cool | Refreshing | Warm | Warm | Refreshing | Refreshing | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 15 | Bracing |
| Feb | 14 | Bracing |
| Mar | 14 | Bracing |
| Apr | 15 | Cool |
| May | 18 | Cool |
| Jun | 22 | Refreshing |
| Jul | 25 | Warm |
| Aug | 26 | Warm |
| Sep | 24 | Refreshing |
| Oct | 21 | Refreshing |
| Nov | 19 | Cool |
| Dec | 16 | Cool |
UV index in Guidonia in August
Clear-sky midday UV in August peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Guidonia peaks around July 15 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 3 | 5 | 4 | 7 | 9 | 10 | 8 | 6 | 3 | 2 | 1 |
| Level | Low | Moderate | High | Moderate | High | Very high | Very high | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 3 | Moderate |
| Mar | 5 | High |
| Apr | 4 | Moderate |
| May | 7 | High |
| Jun | 9 | Very high |
| Jul | 10 | Very high |
| Aug | 8 | Very high |
| Sep | 6 | High |
| Oct | 3 | Moderate |
| Nov | 2 | Moderate |
| Dec | 1 | Low |
Air quality in Guidonia in August
Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.
Air quality in Guidonia is worst in April — around 16 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.
Seasonal pattern from CAMS reanalysis, scaled to Guidonia's WHO annual average of 12.7 µg/m³.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 13 | 14 | 16 | 16 | 14 | 12 | 11 | 12 | 10 | 11 | 11 | 12 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 13 | Moderate |
| Feb | 14 | Moderate |
| Mar | 16 | Moderate |
| Apr | 16 | Moderate |
| May | 14 | Moderate |
| Jun | 12 | Moderate |
| Jul | 11 | Good |
| Aug | 12 | Good |
| Sep | 10 | Good |
| Oct | 11 | Good |
| Nov | 11 | Good |
| Dec | 12 | Moderate |
Where is Guidonia?
Guidonia sits at 42.0°N, 12.7°E, 105 m above sea level, in Italy. The nearest listed city is Guidonia Montecelio, 0.0 km away.
Topography around Guidonia
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Guidonia.
Within 3 km, the terrain around Guidonia has only modest variations in elevation — a maximum elevation change of 226 m around an average of 102 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,246 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,430 m.
The land around Guidonia is covered by cropland (33%) and trees (24%) within 3 km, trees (52%) and cropland (21%) within 16 km, and trees (51%) within 80 km.
Italy travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / F / L
- 230 V · 50 Hz
- Prices
- ≈ 69% of US
- price level, 2025
- GDP per capita
- $43,309
- 2025
- Happiness
- 6.6 / 10
- World Happiness, 2025
- Safe drinking water
- 97%
- of population, 2024
- Homicide rate
- 0.6
- per 100k, 2023
- Road deaths
- 5.3
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Moderate
- EF EPI 513
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Guidonia (41.9923°, 12.7188°, elevation 105 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).