São João de Meriti weather in January
In January, São João de Meriti sees average daytime highs of 31°C and overnight lows near 23°C, with 266 mm of rain across 21.3 wet days and about 13.2 hours of daylight. It is the 2nd-warmest and 1st-wettest month of the year here.
Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 20% of the time in January, and the air most often feels oppressive.
Daylight stretches from about 13 h 24 min at the start of January to 13 h 06 min by month's end. Set against the rest of the year, January is São João de Meriti's 10th-clearest and 8th-windiest month. For the whole year in context, see São João de Meriti's year-round climate.
- Daytime high
- 31°
- 2nd warmest
- Overnight low
- 23°
- 12th coldest
- Rainfall
- 266 mm
- 21.3 wet days
- Daylight
- 13 h 18 min
- 6:25 AM – 7:41 PM
- Cloud cover
- 72%
- 10th clearest
- Wind
- 5 km/h
- 8th windiest
- Solar energy
- 5.79 kWh/m²
- Travel score
- 3.2
- out of 10
São João de Meriti is human settlement in Brazil.
- Air quality
- Moderate
- PM2.5 12 µg/m³ · 2015
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in January
Day-to-day highs hold fairly steady near 31°C through the month.
A typical January day in São João de Meriti reaches about 31°C in the afternoon and slips back to 23°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 35°C. Set against its neighbours, January runs about 1°C warmer than December and on par with February.
| 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 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 32 | 32 |
| Avg low (°C) | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 31 | 23 |
| 2 | 31 | 23 |
| 3 | 31 | 23 |
| 4 | 31 | 23 |
| 5 | 31 | 23 |
| 6 | 31 | 23 |
| 7 | 31 | 23 |
| 8 | 31 | 23 |
| 9 | 31 | 23 |
| 10 | 31 | 23 |
| 11 | 31 | 23 |
| 12 | 31 | 23 |
| 13 | 31 | 23 |
| 14 | 31 | 23 |
| 15 | 31 | 23 |
| 16 | 31 | 23 |
| 17 | 31 | 23 |
| 18 | 31 | 23 |
| 19 | 31 | 23 |
| 20 | 31 | 23 |
| 21 | 31 | 23 |
| 22 | 31 | 23 |
| 23 | 31 | 23 |
| 24 | 31 | 23 |
| 25 | 31 | 23 |
| 26 | 31 | 23 |
| 27 | 31 | 23 |
| 28 | 31 | 23 |
| 29 | 31 | 23 |
| 30 | 32 | 23 |
| 31 | 32 | 23 |
How January really feels in São João de Meriti
Once humidity and wind are folded in, January averages 31 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in January is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
São João de Meriti weather by month
How January compares with the rest of the year at a glance. January is the 2nd-warmest and 1st-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 31° / 23° | 266 | 21.3 | 13.2 | 3.2 |
| Feb | 32° / 23° | 197 | 17.8 | 12.8 | 3.3 |
| Mar | 30° / 22° | 216 | 21.1 | 12.2 | 3.7 |
| Apr | 29° / 21° | 106 | 13.5 | 11.5 | 5.2 |
| May | 26° / 18° | 74 | 11.1 | 10.9 | 6.6 |
| Jun | 26° / 17° | 47 | 7.1 | 10.6 | 7.3 |
| Jul | 26° / 16° | 47 | 7.2 | 10.7 | 7.4 |
| Aug | 26° / 17° | 44 | 7.5 | 11.2 | 7.2 |
| Sep | 27° / 18° | 87 | 11.1 | 11.9 | 6.3 |
| Oct | 28° / 20° | 120 | 14.4 | 12.5 | 5.3 |
| Nov | 28° / 21° | 213 | 19 | 13.1 | 4.4 |
| Dec | 30° / 22° | 237 | 21.2 | 13.4 | 3.6 |
Cloud cover in January
The sky is clear or mostly clear about 20% of the time in January.
Beyond those clear spells, partly cloudy skies cover about 11% of January, with mostly cloudy or overcast conditions the remaining 69%. Skies tend to open up 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 (%) | 30 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 30 | 30 | 30 | 30 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 32 | 32 | 32 | 32 | 32 | 33 | 33 | 35 | 36 | 36 | 36 | 37 |
| Cloudier (%) | 70 | 72 | 71 | 71 | 71 | 71 | 71 | 71 | 70 | 70 | 70 | 70 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 68 | 68 | 68 | 68 | 68 | 67 | 67 | 65 | 64 | 64 | 64 | 63 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 30 | 70 |
| 2 | 28 | 72 |
| 3 | 29 | 71 |
| 4 | 29 | 71 |
| 5 | 29 | 71 |
| 6 | 29 | 71 |
| 7 | 29 | 71 |
| 8 | 29 | 71 |
| 9 | 30 | 70 |
| 10 | 30 | 70 |
| 11 | 30 | 70 |
| 12 | 30 | 70 |
| 13 | 31 | 69 |
| 14 | 31 | 69 |
| 15 | 31 | 69 |
| 16 | 31 | 69 |
| 17 | 31 | 69 |
| 18 | 31 | 69 |
| 19 | 31 | 69 |
| 20 | 32 | 68 |
| 21 | 32 | 68 |
| 22 | 32 | 68 |
| 23 | 32 | 68 |
| 24 | 32 | 68 |
| 25 | 33 | 67 |
| 26 | 33 | 67 |
| 27 | 35 | 65 |
| 28 | 36 | 64 |
| 29 | 36 | 64 |
| 30 | 36 | 64 |
| 31 | 37 | 63 |
Chance of precipitation in January
São João de Meriti gets around 266 mm of rain over 21.3 wet days in January, the wettest month. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 69% and peaks near 73% on the wettest days. The odds ease 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 (%) | 73 | 73 | 72 | 72 | 72 | 71 | 71 | 70 | 70 | 70 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 68 | 68 | 68 | 67 | 67 | 66 | 66 | 65 | 65 | 65 |
| Rain chance (%) | |
|---|---|
| 1 | 73 |
| 2 | 73 |
| 3 | 72 |
| 4 | 72 |
| 5 | 72 |
| 6 | 71 |
| 7 | 71 |
| 8 | 70 |
| 9 | 70 |
| 10 | 70 |
| 11 | 69 |
| 12 | 69 |
| 13 | 69 |
| 14 | 69 |
| 15 | 69 |
| 16 | 69 |
| 17 | 69 |
| 18 | 69 |
| 19 | 69 |
| 20 | 69 |
| 21 | 69 |
| 22 | 68 |
| 23 | 68 |
| 24 | 68 |
| 25 | 67 |
| 26 | 67 |
| 27 | 66 |
| 28 | 66 |
| 29 | 65 |
| 30 | 65 |
| 31 | 65 |
Humidity in January
Most of January feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, January lands in the oppressive band about 74% of days. Sticky, muggy-or-worse air turns up on roughly 99% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Humid (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Muggy (%) | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 14 | 14 |
| Oppressive (%) | 77 | 76 | 76 | 76 | 75 | 75 | 75 | 76 | 76 | 76 | 75 | 75 | 75 | 74 | 74 | 73 | 73 | 73 | 73 | 72 | 72 | 72 | 71 | 71 | 71 | 71 | 72 | 72 | 72 | 74 | 74 |
| Miserable (%) | 6 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 |
| Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|
| 1 | 1 | 16 | 77 | 6 |
| 2 | 1 | 16 | 76 | 7 |
| 3 | 1 | 16 | 76 | 7 |
| 4 | 1 | 16 | 76 | 7 |
| 5 | 1 | 16 | 75 | 8 |
| 6 | 1 | 16 | 75 | 8 |
| 7 | 1 | 16 | 75 | 8 |
| 8 | 0 | 16 | 76 | 8 |
| 9 | 0 | 16 | 76 | 8 |
| 10 | 0 | 16 | 76 | 8 |
| 11 | 0 | 16 | 75 | 9 |
| 12 | 0 | 16 | 75 | 9 |
| 13 | 0 | 16 | 75 | 9 |
| 14 | 1 | 16 | 74 | 9 |
| 15 | 1 | 16 | 74 | 9 |
| 16 | 1 | 16 | 73 | 10 |
| 17 | 1 | 16 | 73 | 10 |
| 18 | 1 | 16 | 73 | 10 |
| 19 | 1 | 16 | 73 | 10 |
| 20 | 1 | 16 | 72 | 11 |
| 21 | 1 | 16 | 72 | 11 |
| 22 | 1 | 16 | 72 | 11 |
| 23 | 1 | 16 | 71 | 12 |
| 24 | 1 | 16 | 71 | 12 |
| 25 | 1 | 16 | 71 | 12 |
| 26 | 1 | 16 | 71 | 12 |
| 27 | 1 | 15 | 72 | 12 |
| 28 | 1 | 15 | 72 | 12 |
| 29 | 1 | 15 | 72 | 12 |
| 30 | 1 | 14 | 74 | 11 |
| 31 | 1 | 14 | 74 | 11 |
Wind in January
Winds average 5 km/h in January.
Across January, daily wind ranges from about 5 km/h on the calmest days to 5 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) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| 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 | 5 | calm |
| 2 | 5 | calm |
| 3 | 5 | calm |
| 4 | 5 | calm |
| 5 | 5 | calm |
| 6 | 5 | calm |
| 7 | 5 | calm |
| 8 | 5 | calm |
| 9 | 5 | calm |
| 10 | 5 | calm |
| 11 | 5 | calm |
| 12 | 5 | calm |
| 13 | 5 | calm |
| 14 | 5 | calm |
| 15 | 5 | calm |
| 16 | 5 | calm |
| 17 | 5 | calm |
| 18 | 5 | calm |
| 19 | 5 | calm |
| 20 | 5 | calm |
| 21 | 5 | calm |
| 22 | 5 | calm |
| 23 | 5 | calm |
| 24 | 5 | calm |
| 25 | 5 | calm |
| 26 | 5 | calm |
| 27 | 5 | calm |
| 28 | 5 | calm |
| 29 | 5 | calm |
| 30 | 5 | calm |
| 31 | 5 | calm |
Sunrise & sunset in January
Daylight runs from about 13 h 24 min at the start of January to 13 h 06 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 18 minutes over January. Sunrise moves from 6:15 AM to 6:35 AM, and sunset from 7:38 PM to 7:38 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) | 13.4 | 13.4 | 13.4 | 13.4 | 13.4 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.3 | 13.2 | 13.2 | 13.2 | 13.2 | 13.2 | 13.2 | 13.2 | 13.2 | 13.1 | 13.1 | 13.1 | 13.1 | 13.1 | 13.1 | 13.1 |
| Sunrise (AM) | 6:15 | 6:16 | 6:17 | 6:17 | 6:18 | 6:18 | 6:19 | 6:20 | 6:20 | 6:21 | 6:22 | 6:22 | 6:23 | 6:24 | 6:24 | 6:25 | 6:26 | 6:26 | 6:27 | 6:28 | 6:28 | 6:29 | 6:30 | 6:31 | 6:31 | 6:32 | 6:33 | 6:33 | 6:34 | 6:35 | 6:35 |
| Sunset (PM) | 7:38 | 7:38 | 7:39 | 7:39 | 7:39 | 7:39 | 7:40 | 7:40 | 7:40 | 7:40 | 7:40 | 7:40 | 7:40 | 7:40 | 7:40 | 7:41 | 7:41 | 7:41 | 7:40 | 7:40 | 7:40 | 7:40 | 7:40 | 7:40 | 7:40 | 7:40 | 7:39 | 7:39 | 7:39 | 7:39 | 7:38 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.4 | 6:15 | 7:38 |
| 2 | 13.4 | 6:16 | 7:38 |
| 3 | 13.4 | 6:17 | 7:39 |
| 4 | 13.4 | 6:17 | 7:39 |
| 5 | 13.4 | 6:18 | 7:39 |
| 6 | 13.3 | 6:18 | 7:39 |
| 7 | 13.3 | 6:19 | 7:40 |
| 8 | 13.3 | 6:20 | 7:40 |
| 9 | 13.3 | 6:20 | 7:40 |
| 10 | 13.3 | 6:21 | 7:40 |
| 11 | 13.3 | 6:22 | 7:40 |
| 12 | 13.3 | 6:22 | 7:40 |
| 13 | 13.3 | 6:23 | 7:40 |
| 14 | 13.3 | 6:24 | 7:40 |
| 15 | 13.3 | 6:24 | 7:40 |
| 16 | 13.3 | 6:25 | 7:41 |
| 17 | 13.2 | 6:26 | 7:41 |
| 18 | 13.2 | 6:26 | 7:41 |
| 19 | 13.2 | 6:27 | 7:40 |
| 20 | 13.2 | 6:28 | 7:40 |
| 21 | 13.2 | 6:28 | 7:40 |
| 22 | 13.2 | 6:29 | 7:40 |
| 23 | 13.2 | 6:30 | 7:40 |
| 24 | 13.2 | 6:31 | 7:40 |
| 25 | 13.1 | 6:31 | 7:40 |
| 26 | 13.1 | 6:32 | 7:40 |
| 27 | 13.1 | 6:33 | 7:39 |
| 28 | 13.1 | 6:33 | 7:39 |
| 29 | 13.1 | 6:34 | 7:39 |
| 30 | 13.1 | 6:35 | 7:39 |
| 31 | 13.1 | 6:35 | 7:38 |
Solar energy in January
Average shortwave solar energy reaching the ground each day in January, about 5.79 kWh/m².
For context, solar energy here swings from a low near 3.33 kWh/m² to a high of 5.93 kWh/m² in February across the year — January's 5.79 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) | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.9 | 5.9 | 5.9 | 5.9 | 5.9 | 5.9 | 5.9 | 5.9 | 5.9 | 6.0 | 6.0 |
| 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 | 5.8 | Bright |
| 2 | 5.8 | Bright |
| 3 | 5.8 | Bright |
| 4 | 5.8 | Bright |
| 5 | 5.8 | Bright |
| 6 | 5.8 | Bright |
| 7 | 5.8 | Bright |
| 8 | 5.8 | Bright |
| 9 | 5.8 | Bright |
| 10 | 5.8 | Bright |
| 11 | 5.8 | Bright |
| 12 | 5.8 | Bright |
| 13 | 5.8 | Bright |
| 14 | 5.8 | Bright |
| 15 | 5.8 | Bright |
| 16 | 5.8 | Bright |
| 17 | 5.8 | Bright |
| 18 | 5.8 | Bright |
| 19 | 5.8 | Bright |
| 20 | 5.8 | Bright |
| 21 | 5.9 | Bright |
| 22 | 5.9 | Bright |
| 23 | 5.9 | Bright |
| 24 | 5.9 | Bright |
| 25 | 5.9 | Bright |
| 26 | 5.9 | Bright |
| 27 | 5.9 | Bright |
| 28 | 5.9 | Bright |
| 29 | 5.9 | Bright |
| 30 | 6.0 | Bright |
| 31 | 6.0 | Bright |
Hazard calendar for São João de Meriti
In January, São João de Meriti sits inside its rainy season season. The full year is below, with each hazard's peak months called out.
São João de Meriti's rainy season runs October–March, when most of the year's rain falls.
Is January a good time to visit São João de Meriti?
Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
January is a weaker month for outdoor sightseeing in São João de Meriti.
What to pack for São João de Meriti in January
From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In January, São João de Meriti sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 21 days see rain.
Sea temperature near São João de Meriti in January
The nearest coast averages about 25°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 36 km away) is warmest in March 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) | 25 | 25 | 26 | 25 | 24 | 23 | 22 | 21 | 21 | 22 | 22 | 24 |
| Comfort | Warm | Warm | Warm | Warm | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 25 | Warm |
| Feb | 25 | 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 | 22 | Refreshing |
| Dec | 24 | Warm |
UV index in São João de Meriti in January
Clear-sky midday UV in January 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 São João de Meriti peaks around January 13 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 13 at about 5 (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) | 14 | 13 | 12 | 9 | 6 | 6 | 5 | 8 | 6 | 11 | 13 | 14 |
| Level | Extreme | Extreme | Extreme | Very high | High | High | Moderate | Very high | High | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 13 | Extreme |
| Mar | 12 | Extreme |
| Apr | 9 | Very high |
| May | 6 | High |
| Jun | 6 | High |
| Jul | 5 | Moderate |
| Aug | 8 | Very high |
| Sep | 6 | High |
| Oct | 11 | Extreme |
| Nov | 13 | Extreme |
| Dec | 14 | Extreme |
Air quality in São João de Meriti in January
Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.
Air quality in São João de Meriti is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (December, 8 µg/m³).
Seasonal pattern from CAMS reanalysis, scaled to São João de Meriti's WHO annual average of 12 µg/m³.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 8 | 8 | 9 | 11 | 14 | 16 | 17 | 14 | 17 | 11 | 9 | 8 |
| Level | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 8 | Good |
| Feb | 8 | Good |
| Mar | 9 | Good |
| Apr | 11 | Good |
| May | 14 | Moderate |
| Jun | 16 | Moderate |
| Jul | 17 | Moderate |
| Aug | 14 | Moderate |
| Sep | 17 | Moderate |
| Oct | 11 | Good |
| Nov | 9 | Good |
| Dec | 8 | Good |
Where is São João de Meriti?
São João de Meriti sits at 22.8°S, 43.4°W, 14 m above sea level, in Brazil. The nearest listed city is Nilópolis, 4.0 km away.
Topography around São João de Meriti
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São João de Meriti.
Within 3 km, the terrain around São João de Meriti has only modest variations in elevation — a maximum elevation change of 154 m around an average of 27 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 956 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,224 m.
The land around São João de Meriti is covered by artificial surfaces (88%) within 3 km, artificial surfaces (52%) and trees (28%) within 16 km, and trees (37%), water (31%) and grassland (24%) 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 São João de Meriti (-22.8039°, -43.3722°, elevation 14 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).