Piraí weather in December
In December, Piraí sees average daytime highs of 28°C and overnight lows near 21°C, with 252 mm of rain across 23.2 wet days and about 13.4 hours of daylight. It is the 4th-warmest and 2nd-wettest month of the year here.
Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 10% of the time in December, and the air most often feels muggy.
Daylight stretches from about 13 h 18 min at the start of December to 13 h 24 min by month's end. Set against the rest of the year, December is Piraí's 11th-clearest and 6th-windiest month. For the whole year in context, see Piraí's year-round climate.
- Daytime high
- 28°
- 4th warmest
- Overnight low
- 21°
- 10th coldest
- Rainfall
- 252 mm
- 23.2 wet days
- Daylight
- 13 h 24 min
- 6:10 AM – 7:33 PM
- Cloud cover
- 76%
- 11th clearest
- Wind
- 6 km/h
- 6th windiest
- Solar energy
- 5.56 kWh/m²
- Travel score
- 4.0
- out of 10
Piraí is human settlement in Brazil.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in December
Day-to-day highs hold fairly steady near 28°C through the month.
A typical December day in Piraí reaches about 28°C in the afternoon and slips back to 21°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 32°C. Set against its neighbours, December runs about 2°C warmer than November and about 1°C cooler than January.
| 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) | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 |
| Avg low (°C) | 20 | 20 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 27 | 20 |
| 2 | 28 | 20 |
| 3 | 28 | 20 |
| 4 | 28 | 20 |
| 5 | 28 | 20 |
| 6 | 28 | 21 |
| 7 | 28 | 21 |
| 8 | 28 | 21 |
| 9 | 28 | 21 |
| 10 | 28 | 21 |
| 11 | 28 | 21 |
| 12 | 28 | 21 |
| 13 | 28 | 21 |
| 14 | 28 | 21 |
| 15 | 28 | 21 |
| 16 | 28 | 21 |
| 17 | 28 | 21 |
| 18 | 28 | 21 |
| 19 | 29 | 21 |
| 20 | 29 | 21 |
| 21 | 29 | 21 |
| 22 | 29 | 21 |
| 23 | 29 | 21 |
| 24 | 29 | 21 |
| 25 | 29 | 21 |
| 26 | 29 | 21 |
| 27 | 29 | 21 |
| 28 | 29 | 21 |
| 29 | 29 | 21 |
| 30 | 29 | 21 |
| 31 | 29 | 21 |
How December really feels in Piraí
Once humidity and wind are folded in, December 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.
December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Piraí weather by month
How December compares with the rest of the year at a glance. December is the 4th-warmest and 2nd-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 29° / 22° | 309 | 23.5 | 13.2 | 3.6 |
| Feb | 30° / 22° | 222 | 19 | 12.8 | 3.8 |
| Mar | 29° / 21° | 225 | 22.6 | 12.2 | 4.1 |
| Apr | 27° / 19° | 117 | 14.5 | 11.5 | 5.8 |
| May | 25° / 17° | 70 | 11.3 | 10.9 | 6.7 |
| Jun | 24° / 16° | 40 | 6.7 | 10.6 | 7.6 |
| Jul | 24° / 15° | 42 | 7.4 | 10.8 | 7.7 |
| Aug | 25° / 16° | 37 | 7 | 11.2 | 7.5 |
| Sep | 26° / 17° | 81 | 11.8 | 11.9 | 6.4 |
| Oct | 27° / 19° | 120 | 15.6 | 12.5 | 5.5 |
| Nov | 27° / 20° | 200 | 20.4 | 13.1 | 4.7 |
| Dec | 28° / 21° | 252 | 23.2 | 13.4 | 4.0 |
Cloud cover in December
The sky is clear or mostly clear about 10% of the time in December.
Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 77%.
| 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 (%) | 20 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 19 | 20 | 20 | 21 | 22 | 22 | 23 | 23 | 23 | 25 | 25 | 26 | 26 | 26 | 27 | 27 | 26 | 27 | 26 | 26 | 26 | 25 | 26 |
| Cloudier (%) | 80 | 80 | 80 | 81 | 81 | 81 | 81 | 81 | 81 | 80 | 80 | 79 | 78 | 78 | 77 | 77 | 77 | 75 | 75 | 74 | 74 | 74 | 73 | 73 | 74 | 73 | 74 | 74 | 74 | 75 | 74 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 20 | 80 |
| 2 | 20 | 80 |
| 3 | 20 | 80 |
| 4 | 19 | 81 |
| 5 | 19 | 81 |
| 6 | 19 | 81 |
| 7 | 19 | 81 |
| 8 | 19 | 81 |
| 9 | 19 | 81 |
| 10 | 20 | 80 |
| 11 | 20 | 80 |
| 12 | 21 | 79 |
| 13 | 22 | 78 |
| 14 | 22 | 78 |
| 15 | 23 | 77 |
| 16 | 23 | 77 |
| 17 | 23 | 77 |
| 18 | 25 | 75 |
| 19 | 25 | 75 |
| 20 | 26 | 74 |
| 21 | 26 | 74 |
| 22 | 26 | 74 |
| 23 | 27 | 73 |
| 24 | 27 | 73 |
| 25 | 26 | 74 |
| 26 | 27 | 73 |
| 27 | 26 | 74 |
| 28 | 26 | 74 |
| 29 | 26 | 74 |
| 30 | 25 | 75 |
| 31 | 26 | 74 |
Chance of precipitation in December
Piraí gets around 252 mm of rain over 23.2 wet days in December. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 75% and peaks near 80% 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 (%) | 69 | 69 | 69 | 70 | 70 | 70 | 70 | 71 | 71 | 71 | 72 | 72 | 73 | 73 | 73 | 74 | 75 | 75 | 76 | 77 | 77 | 78 | 78 | 79 | 79 | 80 | 80 | 80 | 80 | 80 | 80 |
| Rain chance (%) | |
|---|---|
| 1 | 69 |
| 2 | 69 |
| 3 | 69 |
| 4 | 70 |
| 5 | 70 |
| 6 | 70 |
| 7 | 70 |
| 8 | 71 |
| 9 | 71 |
| 10 | 71 |
| 11 | 72 |
| 12 | 72 |
| 13 | 73 |
| 14 | 73 |
| 15 | 73 |
| 16 | 74 |
| 17 | 75 |
| 18 | 75 |
| 19 | 76 |
| 20 | 77 |
| 21 | 77 |
| 22 | 78 |
| 23 | 78 |
| 24 | 79 |
| 25 | 79 |
| 26 | 80 |
| 27 | 80 |
| 28 | 80 |
| 29 | 80 |
| 30 | 80 |
| 31 | 80 |
Humidity in December
Most of December feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, December lands in the muggy band about 54% of days. Sticky, muggy-or-worse air turns up on roughly 90% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Comfortable (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Humid (%) | 19 | 18 | 17 | 17 | 16 | 15 | 15 | 14 | 13 | 12 | 12 | 11 | 10 | 9 | 9 | 9 | 8 | 8 | 8 | 7 | 7 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 5 |
| Muggy (%) | 60 | 60 | 60 | 59 | 58 | 58 | 57 | 57 | 57 | 57 | 55 | 55 | 55 | 55 | 54 | 53 | 53 | 53 | 52 | 52 | 52 | 52 | 51 | 51 | 50 | 50 | 49 | 48 | 48 | 47 | 47 |
| Oppressive (%) | 20 | 21 | 22 | 23 | 25 | 26 | 27 | 29 | 30 | 31 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 39 | 40 | 41 | 41 | 42 | 43 | 43 | 44 | 45 | 46 | 46 | 47 | 47 | 48 |
| Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|
| 1 | 1 | 19 | 60 | 20 |
| 2 | 1 | 18 | 60 | 21 |
| 3 | 1 | 17 | 60 | 22 |
| 4 | 1 | 17 | 59 | 23 |
| 5 | 1 | 16 | 58 | 25 |
| 6 | 1 | 15 | 58 | 26 |
| 7 | 1 | 15 | 57 | 27 |
| 8 | 0 | 14 | 57 | 29 |
| 9 | 0 | 13 | 57 | 30 |
| 10 | 0 | 12 | 57 | 31 |
| 11 | 0 | 12 | 55 | 33 |
| 12 | 0 | 11 | 55 | 34 |
| 13 | 0 | 10 | 55 | 35 |
| 14 | 0 | 9 | 55 | 36 |
| 15 | 0 | 9 | 54 | 37 |
| 16 | 0 | 9 | 53 | 38 |
| 17 | 0 | 8 | 53 | 39 |
| 18 | 0 | 8 | 53 | 39 |
| 19 | 0 | 8 | 52 | 40 |
| 20 | 0 | 7 | 52 | 41 |
| 21 | 0 | 7 | 52 | 41 |
| 22 | 0 | 6 | 52 | 42 |
| 23 | 0 | 6 | 51 | 43 |
| 24 | 0 | 6 | 51 | 43 |
| 25 | 0 | 6 | 50 | 44 |
| 26 | 0 | 5 | 50 | 45 |
| 27 | 0 | 5 | 49 | 46 |
| 28 | 0 | 5 | 48 | 46 |
| 29 | 0 | 5 | 48 | 47 |
| 30 | 0 | 5 | 47 | 47 |
| 31 | 0 | 5 | 47 | 48 |
Wind in December
Winds average 6 km/h in December.
Across December, 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 December
Daylight runs from about 13 h 18 min at the start of December to 13 h 24 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 6 minutes over December. Sunrise moves from 6:07 AM to 6:18 AM, and sunset from 7:24 PM to 7:40 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) | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 |
| Sunrise (AM) | 6:07 | 6:07 | 6:07 | 6:07 | 6:07 | 6:07 | 6:08 | 6:08 | 6:08 | 6:08 | 6:09 | 6:09 | 6:09 | 6:10 | 6:10 | 6:10 | 6:11 | 6:11 | 6:12 | 6:12 | 6:12 | 6:13 | 6:13 | 6:14 | 6:14 | 6:15 | 6:15 | 6:16 | 6:17 | 6:17 | 6:18 |
| Sunset (PM) | 7:24 | 7:25 | 7:25 | 7:26 | 7:27 | 7:27 | 7:28 | 7:28 | 7:29 | 7:30 | 7:30 | 7:31 | 7:31 | 7:32 | 7:33 | 7:33 | 7:34 | 7:34 | 7:35 | 7:35 | 7:36 | 7:36 | 7:37 | 7:37 | 7:38 | 7:38 | 7:38 | 7:39 | 7:39 | 7:39 | 7:40 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.3 | 6:07 | 7:24 |
| 2 | 13.3 | 6:07 | 7:25 |
| 3 | 13.3 | 6:07 | 7:25 |
| 4 | 13.3 | 6:07 | 7:26 |
| 5 | 13.3 | 6:07 | 7:27 |
| 6 | 13.3 | 6:07 | 7:27 |
| 7 | 13.3 | 6:08 | 7:28 |
| 8 | 13.3 | 6:08 | 7:28 |
| 9 | 13.3 | 6:08 | 7:29 |
| 10 | 13.4 | 6:08 | 7:30 |
| 11 | 13.4 | 6:09 | 7:30 |
| 12 | 13.4 | 6:09 | 7:31 |
| 13 | 13.4 | 6:09 | 7:31 |
| 14 | 13.4 | 6:10 | 7:32 |
| 15 | 13.4 | 6:10 | 7:33 |
| 16 | 13.4 | 6:10 | 7:33 |
| 17 | 13.4 | 6:11 | 7:34 |
| 18 | 13.4 | 6:11 | 7:34 |
| 19 | 13.4 | 6:12 | 7:35 |
| 20 | 13.4 | 6:12 | 7:35 |
| 21 | 13.4 | 6:12 | 7:36 |
| 22 | 13.4 | 6:13 | 7:36 |
| 23 | 13.4 | 6:13 | 7:37 |
| 24 | 13.4 | 6:14 | 7:37 |
| 25 | 13.4 | 6:14 | 7:38 |
| 26 | 13.4 | 6:15 | 7:38 |
| 27 | 13.4 | 6:15 | 7:38 |
| 28 | 13.4 | 6:16 | 7:39 |
| 29 | 13.4 | 6:17 | 7:39 |
| 30 | 13.4 | 6:17 | 7:39 |
| 31 | 13.4 | 6:18 | 7:40 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 5.56 kWh/m².
For context, solar energy here swings from a low near 3.36 kWh/m² to a high of 5.81 kWh/m² in February across the year — December's 5.56 kWh/m² sits near the top of that range.
| 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) | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.4 | Bright |
| 2 | 5.4 | Bright |
| 3 | 5.4 | Bright |
| 4 | 5.4 | Bright |
| 5 | 5.4 | Bright |
| 6 | 5.4 | Bright |
| 7 | 5.4 | Bright |
| 8 | 5.4 | Bright |
| 9 | 5.4 | Bright |
| 10 | 5.4 | Bright |
| 11 | 5.5 | Bright |
| 12 | 5.5 | Bright |
| 13 | 5.5 | Bright |
| 14 | 5.5 | Bright |
| 15 | 5.5 | Bright |
| 16 | 5.5 | Bright |
| 17 | 5.5 | Bright |
| 18 | 5.6 | Bright |
| 19 | 5.6 | Bright |
| 20 | 5.6 | Bright |
| 21 | 5.6 | Bright |
| 22 | 5.6 | Bright |
| 23 | 5.6 | Bright |
| 24 | 5.6 | Bright |
| 25 | 5.6 | Bright |
| 26 | 5.6 | Bright |
| 27 | 5.6 | Bright |
| 28 | 5.6 | Bright |
| 29 | 5.6 | Bright |
| 30 | 5.6 | Bright |
| 31 | 5.6 | Bright |
Hazard calendar for Piraí
In December, Piraí sits inside its rainy season season. The full year is below, with each hazard's peak months called out.
Piraí's rainy season runs November–March, when most of the year's rain falls.
Is December a good time to visit Piraí?
Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
December is a reasonable time to visit Piraí for sightseeing.
What to pack for Piraí in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, Piraí sees daytime highs around 28°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 23 days see rain.
Sea temperature near Piraí in December
The nearest coast averages about 24°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 55 km away) is warmest in February at about 26°C and coldest in August near 21°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 26 | 26 | 26 | 25 | 24 | 23 | 22 | 21 | 21 | 22 | 23 | 24 |
| Comfort | Warm | Warm | Warm | Warm | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 26 | Warm |
| Feb | 26 | Warm |
| Mar | 26 | Warm |
| Apr | 25 | Warm |
| May | 24 | Refreshing |
| Jun | 23 | Refreshing |
| Jul | 22 | Refreshing |
| Aug | 21 | Refreshing |
| Sep | 21 | Refreshing |
| Oct | 22 | Refreshing |
| Nov | 23 | Refreshing |
| Dec | 24 | Warm |
UV index in Piraí in December
Clear-sky midday UV in December peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Piraí peaks around February 9 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 5 (high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 14 | 14 | 12 | 9 | 7 | 6 | 5 | 8 | 7 | 11 | 13 | 14 |
| Level | Extreme | Extreme | Extreme | Very high | High | High | High | Very high | High | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 14 | Extreme |
| Mar | 12 | Extreme |
| Apr | 9 | Very high |
| May | 7 | High |
| Jun | 6 | High |
| Jul | 5 | High |
| Aug | 8 | Very high |
| Sep | 7 | High |
| Oct | 11 | Extreme |
| Nov | 13 | Extreme |
| Dec | 14 | Extreme |
Air quality in Piraí in December
Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.
Air quality in Piraí is worst in September — around 33 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 15 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 16 | 16 | 17 | 19 | 24 | 29 | 31 | 27 | 33 | 20 | 17 | 15 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 16 | Moderate |
| Feb | 16 | Moderate |
| Mar | 17 | Moderate |
| Apr | 19 | Moderate |
| May | 24 | Moderate |
| Jun | 29 | Moderate |
| Jul | 31 | Moderate |
| Aug | 27 | Moderate |
| Sep | 33 | Moderate |
| Oct | 20 | Moderate |
| Nov | 17 | Moderate |
| Dec | 15 | Moderate |
Where is Piraí?
Piraí sits at 22.6°S, 43.9°W, 381 m above sea level, in Brazil. The nearest listed city is Pinheiral, 17 km away.
Topography around Piraí
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Piraí.
Within 3 km, the terrain around Piraí has only modest variations in elevation — a maximum elevation change of 209 m around an average of 430 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 806 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,556 m.
The land around Piraí is covered by trees (51%) and grassland (37%) within 3 km, trees (53%) and grassland (43%) within 16 km, and trees (43%), grassland (31%) and water (20%) within 80 km.
Brazil travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / N
- 127 / 220 V · 60 Hz
- Prices
- ≈ 46% of US
- price level, 2025
- GDP per capita
- $10,713
- 2025
- Happiness
- 6.6 / 10
- World Happiness, 2025
- Safe drinking water
- 89%
- of population, 2024
- Homicide rate
- 19.3
- per 100k, 2023
- Road deaths
- 16
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 482
- 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 Piraí (-22.6292°, -43.8981°, elevation 381 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).