União weather in October
In October, União sees average daytime highs of 37°C and overnight lows near 25°C, with 10 mm of rain across 1.5 wet days and about 12.1 hours of daylight. It is the 1st-warmest and 10th-wettest month of the year here.
Day-to-day highs hold fairly steady near 37°C through the month. The sky is clear or mostly clear about 59% of the time in October, and the air most often feels muggy.
Daylight stretches from about 12 hours at the start of October to 12 h 12 min by month's end. Set against the rest of the year, October is União's 3rd-clearest and 1st-windiest month. For the whole year in context, see União's year-round climate.
- Daytime high
- 37°
- 1st warmest
- Overnight low
- 25°
- 11th coldest
- Rainfall
- 10 mm
- 1.5 wet days
- Daylight
- 12 h 06 min
- 5:33 AM – 5:40 PM
- Cloud cover
- 40%
- 3rd clearest
- Wind
- 9 km/h
- 1st windiest
- Solar energy
- 6.71 kWh/m²
- Travel score
- 1.8
- out of 10
União is settlement in Uniao, Piaui, Brazil.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in October
Day-to-day highs hold fairly steady near 37°C through the month.
A typical October day in União reaches about 37°C in the afternoon and slips back to 25°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 35°C and 39°C. Set against its neighbours, October runs on par with September and on par with November.
| 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) | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 |
| Avg low (°C) | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 37 | 25 |
| 2 | 37 | 25 |
| 3 | 37 | 25 |
| 4 | 37 | 25 |
| 5 | 37 | 25 |
| 6 | 37 | 25 |
| 7 | 37 | 25 |
| 8 | 37 | 25 |
| 9 | 37 | 25 |
| 10 | 37 | 25 |
| 11 | 37 | 25 |
| 12 | 37 | 25 |
| 13 | 37 | 25 |
| 14 | 37 | 25 |
| 15 | 37 | 25 |
| 16 | 37 | 25 |
| 17 | 37 | 25 |
| 18 | 37 | 25 |
| 19 | 37 | 25 |
| 20 | 37 | 25 |
| 21 | 37 | 25 |
| 22 | 37 | 25 |
| 23 | 37 | 25 |
| 24 | 37 | 25 |
| 25 | 37 | 25 |
| 26 | 37 | 25 |
| 27 | 37 | 25 |
| 28 | 37 | 25 |
| 29 | 37 | 25 |
| 30 | 37 | 25 |
| 31 | 37 | 25 |
How October really feels in União
Once humidity and wind are folded in, October 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 October is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
União weather by month
How October compares with the rest of the year at a glance. October is the 1st-warmest and 10th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 33° / 24° | 228 | 21.8 | 12.2 | 2.6 |
| Feb | 32° / 23° | 296 | 22.2 | 12.2 | 2.7 |
| Mar | 31° / 23° | 363 | 27 | 12 | 2.6 |
| Apr | 31° / 23° | 325 | 24.6 | 11.9 | 2.8 |
| May | 32° / 23° | 143 | 15.1 | 11.8 | 3.6 |
| Jun | 33° / 23° | 23 | 4.6 | 11.7 | 4.2 |
| Jul | 34° / 23° | 12 | 1.7 | 11.8 | 4.0 |
| Aug | 35° / 24° | 2 | 0.5 | 11.9 | 3.2 |
| Sep | 36° / 24° | 3 | 0.6 | 12 | 2.3 |
| Oct | 37° / 25° | 10 | 1.5 | 12.1 | 1.8 |
| Nov | 36° / 25° | 35 | 4.5 | 12.2 | 2.0 |
| Dec | 35° / 25° | 84 | 9.7 | 12.3 | 2.4 |
Cloud cover in October
The sky is clear or mostly clear about 59% of the time in October.
Beyond those clear spells, partly cloudy skies cover about 21% of October, with mostly cloudy or overcast conditions the remaining 20%. 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 (%) | 88 | 88 | 88 | 87 | 87 | 86 | 86 | 86 | 85 | 84 | 84 | 84 | 83 | 83 | 82 | 82 | 82 | 80 | 80 | 79 | 78 | 77 | 75 | 75 | 74 | 72 | 72 | 71 | 70 | 69 | 68 |
| Cloudier (%) | 12 | 12 | 12 | 13 | 13 | 14 | 14 | 14 | 15 | 16 | 16 | 16 | 17 | 17 | 18 | 18 | 18 | 20 | 20 | 21 | 22 | 23 | 25 | 25 | 26 | 28 | 28 | 29 | 30 | 31 | 32 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 88 | 12 |
| 2 | 88 | 12 |
| 3 | 88 | 12 |
| 4 | 87 | 13 |
| 5 | 87 | 13 |
| 6 | 86 | 14 |
| 7 | 86 | 14 |
| 8 | 86 | 14 |
| 9 | 85 | 15 |
| 10 | 84 | 16 |
| 11 | 84 | 16 |
| 12 | 84 | 16 |
| 13 | 83 | 17 |
| 14 | 83 | 17 |
| 15 | 82 | 18 |
| 16 | 82 | 18 |
| 17 | 82 | 18 |
| 18 | 80 | 20 |
| 19 | 80 | 20 |
| 20 | 79 | 21 |
| 21 | 78 | 22 |
| 22 | 77 | 23 |
| 23 | 75 | 25 |
| 24 | 75 | 25 |
| 25 | 74 | 26 |
| 26 | 72 | 28 |
| 27 | 72 | 28 |
| 28 | 71 | 29 |
| 29 | 70 | 30 |
| 30 | 69 | 31 |
| 31 | 68 | 32 |
Chance of precipitation in October
União gets around 10 mm of rain over 1.5 wet days in October. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 5% and peaks near 10% 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 (%) | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 4 | 4 | 4 | 5 | 5 | 5 | 6 | 6 | 6 | 7 | 7 | 7 | 8 | 8 | 8 | 9 | 9 | 9 | 10 |
| Rain chance (%) | |
|---|---|
| 1 | 3 |
| 2 | 3 |
| 3 | 2 |
| 4 | 2 |
| 5 | 2 |
| 6 | 2 |
| 7 | 2 |
| 8 | 2 |
| 9 | 2 |
| 10 | 3 |
| 11 | 3 |
| 12 | 3 |
| 13 | 4 |
| 14 | 4 |
| 15 | 4 |
| 16 | 5 |
| 17 | 5 |
| 18 | 5 |
| 19 | 6 |
| 20 | 6 |
| 21 | 6 |
| 22 | 7 |
| 23 | 7 |
| 24 | 7 |
| 25 | 8 |
| 26 | 8 |
| 27 | 8 |
| 28 | 9 |
| 29 | 9 |
| 30 | 9 |
| 31 | 10 |
Humidity in October
Most of October feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, October lands in the muggy band about 68% of days. Sticky, muggy-or-worse air turns up on roughly 80% 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 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Humid (%) | 17 | 17 | 18 | 18 | 18 | 19 | 19 | 19 | 20 | 20 | 20 | 20 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 16 | 16 | 15 |
| Muggy (%) | 73 | 74 | 73 | 73 | 73 | 72 | 72 | 72 | 70 | 70 | 70 | 70 | 69 | 69 | 70 | 69 | 69 | 68 | 67 | 67 | 67 | 67 | 66 | 65 | 64 | 65 | 64 | 63 | 63 | 62 | 62 |
| Oppressive (%) | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 11 | 11 | 12 | 13 | 13 | 14 | 14 | 15 | 16 | 17 | 17 | 18 | 19 | 20 | 21 | 22 |
| Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|
| 1 | 1 | 17 | 73 | 9 |
| 2 | 1 | 17 | 74 | 8 |
| 3 | 1 | 18 | 73 | 8 |
| 4 | 1 | 18 | 73 | 8 |
| 5 | 1 | 18 | 73 | 8 |
| 6 | 1 | 19 | 72 | 8 |
| 7 | 1 | 19 | 72 | 8 |
| 8 | 1 | 19 | 72 | 8 |
| 9 | 1 | 20 | 70 | 9 |
| 10 | 1 | 20 | 70 | 9 |
| 11 | 1 | 20 | 70 | 9 |
| 12 | 1 | 20 | 70 | 9 |
| 13 | 1 | 20 | 69 | 10 |
| 14 | 1 | 20 | 69 | 10 |
| 15 | 1 | 19 | 70 | 10 |
| 16 | 1 | 19 | 69 | 11 |
| 17 | 1 | 19 | 69 | 11 |
| 18 | 1 | 19 | 68 | 12 |
| 19 | 1 | 19 | 67 | 13 |
| 20 | 1 | 19 | 67 | 13 |
| 21 | 1 | 18 | 67 | 14 |
| 22 | 1 | 18 | 67 | 14 |
| 23 | 1 | 18 | 66 | 15 |
| 24 | 1 | 18 | 65 | 16 |
| 25 | 1 | 18 | 64 | 17 |
| 26 | 1 | 17 | 65 | 17 |
| 27 | 1 | 17 | 64 | 18 |
| 28 | 1 | 17 | 63 | 19 |
| 29 | 1 | 16 | 63 | 20 |
| 30 | 1 | 16 | 62 | 21 |
| 31 | 1 | 15 | 62 | 22 |
Wind in October
Winds average 9 km/h in October, the windiest month of the year.
Across October, daily wind ranges from about 9 km/h on the calmest days to 9 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) | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
| 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 | 9 | calm |
| 2 | 9 | calm |
| 3 | 9 | calm |
| 4 | 9 | calm |
| 5 | 9 | calm |
| 6 | 9 | calm |
| 7 | 9 | calm |
| 8 | 9 | calm |
| 9 | 9 | calm |
| 10 | 9 | calm |
| 11 | 9 | calm |
| 12 | 9 | calm |
| 13 | 9 | calm |
| 14 | 9 | calm |
| 15 | 9 | calm |
| 16 | 9 | calm |
| 17 | 9 | calm |
| 18 | 9 | calm |
| 19 | 9 | calm |
| 20 | 9 | calm |
| 21 | 9 | calm |
| 22 | 9 | calm |
| 23 | 9 | calm |
| 24 | 9 | calm |
| 25 | 9 | calm |
| 26 | 9 | calm |
| 27 | 9 | calm |
| 28 | 9 | calm |
| 29 | 9 | calm |
| 30 | 9 | calm |
| 31 | 9 | calm |
Sunrise & sunset in October
Daylight runs from about 12 hours at the start of October to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 12 minutes over October. Sunrise moves from 5:39 AM to 5:30 AM, and sunset from 5:42 PM to 5:40 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) | 12.0 | 12.0 | 12.0 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.2 | 12.2 | 12.2 |
| Sunrise (AM) | 5:39 | 5:39 | 5:38 | 5:38 | 5:37 | 5:37 | 5:37 | 5:36 | 5:36 | 5:35 | 5:35 | 5:35 | 5:34 | 5:34 | 5:34 | 5:33 | 5:33 | 5:33 | 5:33 | 5:32 | 5:32 | 5:32 | 5:32 | 5:31 | 5:31 | 5:31 | 5:31 | 5:31 | 5:30 | 5:30 | 5:30 |
| Sunset (PM) | 5:42 | 5:41 | 5:41 | 5:41 | 5:41 | 5:41 | 5:41 | 5:40 | 5:40 | 5:40 | 5:40 | 5:40 | 5:40 | 5:40 | 5:40 | 5:40 | 5:40 | 5:39 | 5:39 | 5:39 | 5:39 | 5:39 | 5:39 | 5:39 | 5:39 | 5:39 | 5:39 | 5:40 | 5:40 | 5:40 | 5:40 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.0 | 5:39 | 5:42 |
| 2 | 12.0 | 5:39 | 5:41 |
| 3 | 12.0 | 5:38 | 5:41 |
| 4 | 12.1 | 5:38 | 5:41 |
| 5 | 12.1 | 5:37 | 5:41 |
| 6 | 12.1 | 5:37 | 5:41 |
| 7 | 12.1 | 5:37 | 5:41 |
| 8 | 12.1 | 5:36 | 5:40 |
| 9 | 12.1 | 5:36 | 5:40 |
| 10 | 12.1 | 5:35 | 5:40 |
| 11 | 12.1 | 5:35 | 5:40 |
| 12 | 12.1 | 5:35 | 5:40 |
| 13 | 12.1 | 5:34 | 5:40 |
| 14 | 12.1 | 5:34 | 5:40 |
| 15 | 12.1 | 5:34 | 5:40 |
| 16 | 12.1 | 5:33 | 5:40 |
| 17 | 12.1 | 5:33 | 5:40 |
| 18 | 12.1 | 5:33 | 5:39 |
| 19 | 12.1 | 5:33 | 5:39 |
| 20 | 12.1 | 5:32 | 5:39 |
| 21 | 12.1 | 5:32 | 5:39 |
| 22 | 12.1 | 5:32 | 5:39 |
| 23 | 12.1 | 5:32 | 5:39 |
| 24 | 12.1 | 5:31 | 5:39 |
| 25 | 12.1 | 5:31 | 5:39 |
| 26 | 12.1 | 5:31 | 5:39 |
| 27 | 12.1 | 5:31 | 5:39 |
| 28 | 12.1 | 5:31 | 5:40 |
| 29 | 12.2 | 5:30 | 5:40 |
| 30 | 12.2 | 5:30 | 5:40 |
| 31 | 12.2 | 5:30 | 5:40 |
Solar energy in October
Average shortwave solar energy reaching the ground each day in October, about 6.71 kWh/m² — the sunniest month for solar.
For context, solar energy here swings from a low near 4.76 kWh/m² to a high of 6.71 kWh/m² in October across the year — October's 6.71 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) | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.5 |
| 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 | 6.7 | Intense |
| 2 | 6.7 | Intense |
| 3 | 6.7 | Intense |
| 4 | 6.7 | Intense |
| 5 | 6.7 | Intense |
| 6 | 6.7 | Intense |
| 7 | 6.7 | Intense |
| 8 | 6.7 | Intense |
| 9 | 6.7 | Intense |
| 10 | 6.7 | Intense |
| 11 | 6.7 | Intense |
| 12 | 6.7 | Intense |
| 13 | 6.7 | Intense |
| 14 | 6.7 | Intense |
| 15 | 6.7 | Intense |
| 16 | 6.7 | Intense |
| 17 | 6.7 | Intense |
| 18 | 6.7 | Intense |
| 19 | 6.7 | Intense |
| 20 | 6.7 | Intense |
| 21 | 6.7 | Intense |
| 22 | 6.7 | Intense |
| 23 | 6.7 | 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 | 6.5 | Intense |
Hazard calendar for União
None of União's seasonal hazards are active in October. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
União's monsoon runs January–April, when most of the year's rain falls.
Is October a good time to visit União?
Our two travel scores rate October for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
October is a weaker month for outdoor sightseeing in União.
What to pack for União in October
From October's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In October, União sees daytime highs around 37°C and nights near 25°C. Pack light clothes and sun protection.
UV index in União in October
Clear-sky midday UV in October 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 União peaks around March 14 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 24 at about 10 (very 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) | 13 | 14 | 15 | 13 | 11 | 10 | 10 | 10 | 12 | 12 | 11 | 11 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 13 | Extreme |
| Feb | 14 | Extreme |
| Mar | 15 | Extreme |
| Apr | 13 | Extreme |
| May | 11 | Extreme |
| Jun | 10 | Very high |
| Jul | 10 | Very high |
| Aug | 10 | Very high |
| Sep | 12 | Extreme |
| Oct | 12 | Extreme |
| Nov | 11 | Extreme |
| Dec | 11 | Extreme |
Air quality in União in October
Average fine-particle pollution (PM2.5) through the year — so you can see where October falls, not just the annual average.
Air quality in União is worst in November — around 22 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (June, 10 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) | 15 | 16 | 14 | 13 | 12 | 10 | 14 | 20 | 17 | 22 | 22 | 18 |
| Level | Moderate | Moderate | Moderate | Moderate | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 15 | Moderate |
| Feb | 16 | Moderate |
| Mar | 14 | Moderate |
| Apr | 13 | Moderate |
| May | 12 | Good |
| Jun | 10 | Good |
| Jul | 14 | Moderate |
| Aug | 20 | Moderate |
| Sep | 17 | Moderate |
| Oct | 22 | Moderate |
| Nov | 22 | Moderate |
| Dec | 18 | Moderate |
Where is União?
União sits at 4.6°S, 42.9°W, 60 m above sea level, in Brazil. The nearest listed city is José de Freitas, 37 km away.
Topography around União
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of União.
Within 3 km, the terrain around União has only modest variations in elevation — a maximum elevation change of 96 m around an average of 54 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 139 m; within 80 km, significant variations in elevation — a maximum elevation change of 318 m.
The land around União is covered by grassland (40%) and trees (24%) within 3 km, trees (58%) and grassland (23%) within 16 km, and trees (66%) 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 União (-4.5858°, -42.8642°, elevation 60 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. 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).