Viamão weather in December
In December, Viamão sees average daytime highs of 29°C and overnight lows near 19°C, with 129 mm of rain across 12.4 wet days and about 13.9 hours of daylight. It is the 3rd-warmest and 5th-wettest month of the year here.
Highs climb over the month, from about 28°C in the first days to 29°C by the end. The sky is clear or mostly clear about 34% of the time in December, and the air most often feels muggy.
Daylight stretches from about 13 h 48 min at the start of December to 13 h 54 min by month's end. Set against the rest of the year, December is Viamão's 3rd-clearest and 4th-windiest month. For the whole year in context, see Viamão's year-round climate.
- Daytime high
- 29°
- 3rd warmest
- Overnight low
- 19°
- 9th coldest
- Rainfall
- 129 mm
- 12.4 wet days
- Daylight
- 13 h 54 min
- 6:22 AM – 8:18 PM
- Cloud cover
- 57%
- 3rd clearest
- Wind
- 11 km/h
- 4th windiest
- Solar energy
- 6.65 kWh/m²
- Travel score
- 5.4
- out of 10
Viamão is human settlement in Brazil.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in December
Highs climb over the month, from about 28°C in the first days to 29°C by the end.
A typical December day in Viamão reaches about 29°C in the afternoon and slips back to 19°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 33°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) | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 30 | 30 | 30 |
| Avg low (°C) | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 28 | 18 |
| 2 | 28 | 18 |
| 3 | 28 | 18 |
| 4 | 28 | 18 |
| 5 | 28 | 18 |
| 6 | 28 | 18 |
| 7 | 28 | 18 |
| 8 | 28 | 19 |
| 9 | 28 | 19 |
| 10 | 28 | 19 |
| 11 | 28 | 19 |
| 12 | 29 | 19 |
| 13 | 29 | 19 |
| 14 | 29 | 19 |
| 15 | 29 | 19 |
| 16 | 29 | 19 |
| 17 | 29 | 19 |
| 18 | 29 | 19 |
| 19 | 29 | 19 |
| 20 | 29 | 20 |
| 21 | 29 | 20 |
| 22 | 29 | 20 |
| 23 | 29 | 20 |
| 24 | 29 | 20 |
| 25 | 29 | 20 |
| 26 | 29 | 20 |
| 27 | 29 | 20 |
| 28 | 29 | 20 |
| 29 | 30 | 20 |
| 30 | 30 | 20 |
| 31 | 30 | 20 |
Viamão weather by month
How December compares with the rest of the year at a glance. December is the 3rd-warmest and 5th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 30° / 21° | 140 | 14.2 | 13.7 | 4.7 |
| Feb | 29° / 20° | 127 | 13.9 | 13.1 | 4.7 |
| Mar | 28° / 19° | 121 | 12.6 | 12.2 | 5.7 |
| Apr | 25° / 16° | 102 | 9.7 | 11.3 | 6.8 |
| May | 22° / 13° | 106 | 9.2 | 10.5 | 6.7 |
| Jun | 20° / 11° | 112 | 9.4 | 10.1 | 6.2 |
| Jul | 19° / 10° | 136 | 10.3 | 10.3 | 6.1 |
| Aug | 21° / 11° | 122 | 10.4 | 10.9 | 6.5 |
| Sep | 22° / 13° | 147 | 11.2 | 11.8 | 6.3 |
| Oct | 24° / 15° | 169 | 12.7 | 12.7 | 6.4 |
| Nov | 27° / 17° | 122 | 10.9 | 13.5 | 6.4 |
| Dec | 29° / 19° | 129 | 12.4 | 13.9 | 5.4 |
Cloud cover in December
The sky is clear or mostly clear about 34% of the time in December.
Beyond those clear spells, partly cloudy skies cover about 17% of December, with mostly cloudy or overcast conditions the remaining 49%.
| 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 (%) | 52 | 52 | 51 | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 51 | 51 | 51 | 51 | 50 | 50 | 50 | 50 | 50 | 49 | 49 | 48 | 49 | 49 | 49 | 50 |
| Cloudier (%) | 48 | 48 | 49 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 49 | 49 | 49 | 49 | 50 | 50 | 50 | 50 | 50 | 51 | 51 | 52 | 51 | 51 | 51 | 50 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 52 | 48 |
| 2 | 52 | 48 |
| 3 | 51 | 49 |
| 4 | 52 | 48 |
| 5 | 52 | 48 |
| 6 | 52 | 48 |
| 7 | 52 | 48 |
| 8 | 52 | 48 |
| 9 | 52 | 48 |
| 10 | 52 | 48 |
| 11 | 52 | 48 |
| 12 | 52 | 48 |
| 13 | 52 | 48 |
| 14 | 52 | 48 |
| 15 | 52 | 48 |
| 16 | 51 | 49 |
| 17 | 51 | 49 |
| 18 | 51 | 49 |
| 19 | 51 | 49 |
| 20 | 50 | 50 |
| 21 | 50 | 50 |
| 22 | 50 | 50 |
| 23 | 50 | 50 |
| 24 | 50 | 50 |
| 25 | 49 | 51 |
| 26 | 49 | 51 |
| 27 | 48 | 52 |
| 28 | 49 | 51 |
| 29 | 49 | 51 |
| 30 | 49 | 51 |
| 31 | 50 | 50 |
Chance of precipitation in December
Viamão gets around 129 mm of rain over 12.4 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 40% and peaks near 42% on the wettest days.
| 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 (%) | 38 | 38 | 38 | 38 | 38 | 38 | 39 | 39 | 39 | 40 | 40 | 40 | 41 | 41 | 41 | 41 | 42 | 42 | 42 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 40 | 40 | 40 | 41 | 41 |
| Rain chance (%) | |
|---|---|
| 1 | 38 |
| 2 | 38 |
| 3 | 38 |
| 4 | 38 |
| 5 | 38 |
| 6 | 38 |
| 7 | 39 |
| 8 | 39 |
| 9 | 39 |
| 10 | 40 |
| 11 | 40 |
| 12 | 40 |
| 13 | 41 |
| 14 | 41 |
| 15 | 41 |
| 16 | 41 |
| 17 | 42 |
| 18 | 42 |
| 19 | 42 |
| 20 | 41 |
| 21 | 41 |
| 22 | 41 |
| 23 | 41 |
| 24 | 41 |
| 25 | 41 |
| 26 | 41 |
| 27 | 40 |
| 28 | 40 |
| 29 | 40 |
| 30 | 41 |
| 31 | 41 |
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 37% of days. Sticky, muggy-or-worse air turns up on roughly 56% 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 (%) | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 1 |
| Comfortable (%) | 21 | 21 | 20 | 20 | 19 | 18 | 17 | 17 | 16 | 15 | 15 | 14 | 14 | 13 | 13 | 12 | 12 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 8 | 8 | 8 |
| Humid (%) | 31 | 31 | 31 | 30 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 28 | 27 | 27 | 26 | 25 | 24 | 24 | 23 | 23 | 22 | 22 | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 20 |
| Muggy (%) | 34 | 34 | 35 | 35 | 35 | 36 | 36 | 36 | 36 | 36 | 37 | 37 | 37 | 38 | 38 | 38 | 39 | 39 | 38 | 38 | 38 | 38 | 38 | 37 | 37 | 37 | 37 | 37 | 36 | 36 | 36 |
| Oppressive (%) | 7 | 7 | 7 | 8 | 9 | 9 | 10 | 11 | 12 | 13 | 14 | 14 | 15 | 16 | 17 | 19 | 20 | 21 | 22 | 24 | 25 | 26 | 28 | 29 | 30 | 31 | 32 | 33 | 33 | 34 | 34 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 7 | 21 | 31 | 34 | 7 |
| 2 | 7 | 21 | 31 | 34 | 7 |
| 3 | 7 | 20 | 31 | 35 | 7 |
| 4 | 7 | 20 | 30 | 35 | 8 |
| 5 | 7 | 19 | 30 | 35 | 9 |
| 6 | 7 | 18 | 30 | 36 | 9 |
| 7 | 7 | 17 | 30 | 36 | 10 |
| 8 | 7 | 17 | 29 | 36 | 11 |
| 9 | 7 | 16 | 29 | 36 | 12 |
| 10 | 6 | 15 | 29 | 36 | 13 |
| 11 | 6 | 15 | 29 | 37 | 14 |
| 12 | 6 | 14 | 29 | 37 | 14 |
| 13 | 5 | 14 | 28 | 37 | 15 |
| 14 | 5 | 13 | 27 | 38 | 16 |
| 15 | 5 | 13 | 27 | 38 | 17 |
| 16 | 5 | 12 | 26 | 38 | 19 |
| 17 | 4 | 12 | 25 | 39 | 20 |
| 18 | 4 | 11 | 24 | 39 | 21 |
| 19 | 4 | 11 | 24 | 38 | 22 |
| 20 | 4 | 11 | 23 | 38 | 24 |
| 21 | 3 | 11 | 23 | 38 | 25 |
| 22 | 3 | 10 | 22 | 38 | 26 |
| 23 | 3 | 10 | 22 | 38 | 28 |
| 24 | 3 | 10 | 21 | 37 | 29 |
| 25 | 2 | 9 | 21 | 37 | 30 |
| 26 | 2 | 9 | 20 | 37 | 31 |
| 27 | 2 | 9 | 20 | 37 | 32 |
| 28 | 2 | 9 | 20 | 37 | 33 |
| 29 | 2 | 8 | 20 | 36 | 33 |
| 30 | 2 | 8 | 20 | 36 | 34 |
| 31 | 1 | 8 | 20 | 36 | 34 |
Wind in December
Winds average 11 km/h in December.
Across December, daily wind ranges from about 11 km/h on the calmest days to 12 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) | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 |
| 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 | 12 | calm |
| 2 | 12 | calm |
| 3 | 12 | calm |
| 4 | 12 | calm |
| 5 | 12 | calm |
| 6 | 12 | calm |
| 7 | 12 | calm |
| 8 | 11 | calm |
| 9 | 11 | calm |
| 10 | 11 | calm |
| 11 | 11 | calm |
| 12 | 11 | calm |
| 13 | 11 | calm |
| 14 | 11 | calm |
| 15 | 11 | calm |
| 16 | 11 | calm |
| 17 | 11 | calm |
| 18 | 11 | calm |
| 19 | 11 | calm |
| 20 | 11 | calm |
| 21 | 11 | calm |
| 22 | 11 | calm |
| 23 | 11 | calm |
| 24 | 11 | calm |
| 25 | 11 | calm |
| 26 | 11 | calm |
| 27 | 11 | calm |
| 28 | 11 | calm |
| 29 | 11 | calm |
| 30 | 11 | calm |
| 31 | 11 | calm |
Sunrise & sunset in December
Daylight runs from about 13 h 48 min at the start of December to 13 h 54 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 6:20 AM to 6:30 AM, and sunset from 8:08 PM to 8:25 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) | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 |
| Sunrise (AM) | 6:20 | 6:20 | 6:20 | 6:20 | 6:20 | 6:20 | 6:20 | 6:20 | 6:21 | 6:21 | 6:21 | 6:21 | 6:21 | 6:22 | 6:22 | 6:22 | 6:23 | 6:23 | 6:24 | 6:24 | 6:24 | 6:25 | 6:25 | 6:26 | 6:26 | 6:27 | 6:27 | 6:28 | 6:29 | 6:29 | 6:30 |
| Sunset (PM) | 8:08 | 8:09 | 8:09 | 8:10 | 8:11 | 8:12 | 8:12 | 8:13 | 8:14 | 8:14 | 8:15 | 8:16 | 8:16 | 8:17 | 8:17 | 8:18 | 8:19 | 8:19 | 8:20 | 8:20 | 8:21 | 8:21 | 8:22 | 8:22 | 8:23 | 8:23 | 8:23 | 8:24 | 8:24 | 8:24 | 8:25 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.8 | 6:20 | 8:08 |
| 2 | 13.8 | 6:20 | 8:09 |
| 3 | 13.8 | 6:20 | 8:09 |
| 4 | 13.8 | 6:20 | 8:10 |
| 5 | 13.8 | 6:20 | 8:11 |
| 6 | 13.9 | 6:20 | 8:12 |
| 7 | 13.9 | 6:20 | 8:12 |
| 8 | 13.9 | 6:20 | 8:13 |
| 9 | 13.9 | 6:21 | 8:14 |
| 10 | 13.9 | 6:21 | 8:14 |
| 11 | 13.9 | 6:21 | 8:15 |
| 12 | 13.9 | 6:21 | 8:16 |
| 13 | 13.9 | 6:21 | 8:16 |
| 14 | 13.9 | 6:22 | 8:17 |
| 15 | 13.9 | 6:22 | 8:17 |
| 16 | 13.9 | 6:22 | 8:18 |
| 17 | 13.9 | 6:23 | 8:19 |
| 18 | 13.9 | 6:23 | 8:19 |
| 19 | 13.9 | 6:24 | 8:20 |
| 20 | 13.9 | 6:24 | 8:20 |
| 21 | 13.9 | 6:24 | 8:21 |
| 22 | 13.9 | 6:25 | 8:21 |
| 23 | 13.9 | 6:25 | 8:22 |
| 24 | 13.9 | 6:26 | 8:22 |
| 25 | 13.9 | 6:26 | 8:23 |
| 26 | 13.9 | 6:27 | 8:23 |
| 27 | 13.9 | 6:27 | 8:23 |
| 28 | 13.9 | 6:28 | 8:24 |
| 29 | 13.9 | 6:29 | 8:24 |
| 30 | 13.9 | 6:29 | 8:24 |
| 31 | 13.9 | 6:30 | 8:25 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 6.65 kWh/m² — the sunniest month for solar.
For context, solar energy here swings from a low near 2.44 kWh/m² to a high of 6.65 kWh/m² in December across the year — December's 6.65 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) | 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 | 6.6 | 6.7 | 6.7 | 6.7 | 6.7 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.6 | Intense |
| 2 | 6.6 | Intense |
| 3 | 6.6 | Intense |
| 4 | 6.6 | Intense |
| 5 | 6.6 | Intense |
| 6 | 6.6 | Intense |
| 7 | 6.6 | Intense |
| 8 | 6.6 | Intense |
| 9 | 6.6 | Intense |
| 10 | 6.6 | Intense |
| 11 | 6.6 | Intense |
| 12 | 6.6 | Intense |
| 13 | 6.6 | Intense |
| 14 | 6.6 | Intense |
| 15 | 6.6 | Intense |
| 16 | 6.6 | Intense |
| 17 | 6.7 | Intense |
| 18 | 6.7 | Intense |
| 19 | 6.7 | Intense |
| 20 | 6.7 | Intense |
| 21 | 6.6 | Intense |
| 22 | 6.6 | Intense |
| 23 | 6.6 | Intense |
| 24 | 6.6 | Intense |
| 25 | 6.6 | Intense |
| 26 | 6.6 | Intense |
| 27 | 6.6 | Intense |
| 28 | 6.6 | Intense |
| 29 | 6.6 | Intense |
| 30 | 6.6 | Intense |
| 31 | 6.6 | Intense |
Is December a good time to visit Viamão?
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 Viamão for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Viamão in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, Viamão sees daytime highs around 29°C and nights near 19°C. Pack light clothes and sun protection. Worth having: rain gear. About 12 days see rain.
Sea temperature near Viamão 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 34 km away) is warmest in February at about 26°C and coldest in July near 15°C.
It's comfortable for a long swim from Oct 23 to May 10 — about 6.6 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 26 | 26 | 25 | 23 | 19 | 17 | 15 | 16 | 17 | 20 | 22 | 24 |
| Comfort | Warm | Warm | Warm | Refreshing | Cool | Cool | Cool | Cool | Cool | Cool | Refreshing | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 26 | Warm |
| Feb | 26 | Warm |
| Mar | 25 | Warm |
| Apr | 23 | Refreshing |
| May | 19 | Cool |
| Jun | 17 | Cool |
| Jul | 15 | Cool |
| Aug | 16 | Cool |
| Sep | 17 | Cool |
| Oct | 20 | Cool |
| Nov | 22 | Refreshing |
| Dec | 24 | Warm |
UV index in Viamão in December
Clear-sky midday UV in December peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Viamão peaks around January 15 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 3 (moderate).
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) | 13 | 12 | 10 | 7 | 4 | 3 | 4 | 5 | 8 | 8 | 11 | 12 |
| Level | Extreme | Extreme | Very high | Very high | Moderate | Moderate | Moderate | Moderate | Very high | Very high | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 13 | Extreme |
| Feb | 12 | Extreme |
| Mar | 10 | Very high |
| Apr | 7 | Very high |
| May | 4 | Moderate |
| Jun | 3 | Moderate |
| Jul | 4 | Moderate |
| Aug | 5 | Moderate |
| Sep | 8 | Very high |
| Oct | 8 | Very high |
| Nov | 11 | Extreme |
| Dec | 12 | Extreme |
Air quality in Viamão 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 Viamão is worst in August — around 27 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 13 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) | 13 | 13 | 15 | 18 | 21 | 23 | 25 | 27 | 23 | 16 | 15 | 13 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 13 | Moderate |
| Feb | 13 | Moderate |
| Mar | 15 | Moderate |
| Apr | 18 | Moderate |
| May | 21 | Moderate |
| Jun | 23 | Moderate |
| Jul | 25 | Moderate |
| Aug | 27 | Moderate |
| Sep | 23 | Moderate |
| Oct | 16 | Moderate |
| Nov | 15 | Moderate |
| Dec | 13 | Moderate |
Where is Viamão?
Viamão sits at 30.1°S, 51.0°W, 108 m above sea level, in Brazil. The nearest listed city is Alvorada, 10 km away.
Topography around Viamão
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Viamão.
Within 3 km, the terrain around Viamão has only modest variations in elevation — a maximum elevation change of 101 m around an average of 70 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 310 m; within 80 km, large variations in elevation — a maximum elevation change of 941 m.
The land around Viamão is covered by trees (60%) and artificial surfaces (22%) within 3 km, trees (47%) and grassland (25%) within 16 km, and trees (38%), grassland (21%) 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 Viamão (-30.0811°, -51.0233°, elevation 108 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).