Weather in Rio Grande Brazil on 18 August 2026
Preliminary outlook for 18 August 2026
A preliminary estimate based on the 2019–2025 archive: daytime around +16°C and nighttime around +12°C, average precipitation 0.8 mm, wind around 6 m/s, humidity around 88%.
This is a climate-based estimate, not a precise long-range forecast. It is replaced by hourly data when the date enters the forecast window.
+15°C
Weather archive — latest year: 2025
Patchy rain nearby
Weather archive — latest year: 2025
Nighttime: +14°C
Precipitation: 0.3 mm
Wind: 6 — 7 m/s
Humidity: 90%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +17°C | Sun hours | 4 h |
| UV index | 4 | Cloud cover (avg.) | 71% |
| Pressure (avg.) | 767 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +15°C | Dew point (avg.) | +14°C |
| Heat index (avg.) | +16°C | Wind chill (avg.) | +15°C |
| Wind gusts (max.) | 11 m/s | Wind direction (avg.) | 81° ↗ (ENE) |
Sunrise
07:01
Duration
11 h 02 min
Sunset
18:03
Moonrise
03:27
Moonset
13:11
Moon phase
Last Quarter
Illumination
29%
+15°C
Weather archive — for 2024 year
Overcast
Weather archive — for 2024 year
Nighttime: +14°C
Precipitation: 0.1 mm
Wind: 7 — 8 m/s
Humidity: 97%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +16°C | Sun hours | 1 h |
| UV index | 4 | Cloud cover (avg.) | 100% |
| Pressure (avg.) | 762 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 8 km | Sea temperature | — |
| Feels like (avg.) | +14°C | Dew point (avg.) | +15°C |
| Heat index (avg.) | +15°C | Wind chill (avg.) | +14°C |
| Wind gusts (max.) | 12 m/s | Wind direction (avg.) | 92° → (E) |
Sunrise
07:01
Duration
11 h 03 min
Sunset
18:04
Moonrise
16:51
Moonset
06:22
Moon phase
Waxing Gibbous
Illumination
93%
+16°C
Weather archive — for 2023 year
Moderate or heavy rain shower
Weather archive — for 2023 year
Nighttime: +13°C
Precipitation: 3.6 mm
Wind: 3 — 4 m/s
Humidity: 98%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +17°C | Sun hours | 2 h |
| UV index | 4 | Cloud cover (avg.) | 95% |
| Pressure (avg.) | 756 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 6 km | Sea temperature | — |
| Feels like (avg.) | +17°C | Dew point (avg.) | +16°C |
| Heat index (avg.) | +17°C | Wind chill (avg.) | +17°C |
| Wind gusts (max.) | 7 m/s | Wind direction (avg.) | 273° ↖ (NNW) |
Sunrise
07:02
Duration
11 h 01 min
Sunset
18:03
Moonrise
08:22
Moonset
20:08
Moon phase
Waxing Crescent
Illumination
9%
+12°C
Weather archive — for 2022 year
Partly Cloudy
Weather archive — for 2022 year
Nighttime: +8°C
Precipitation: 0.1 mm
Wind: 9 — 9 m/s
Humidity: 72%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +14°C | Sun hours | 8 h |
| UV index | 3 | Cloud cover (avg.) | 79% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +10°C | Dew point (avg.) | +7°C |
| Heat index (avg.) | +13°C | Wind chill (avg.) | +10°C |
| Wind gusts (max.) | 15 m/s | Wind direction (avg.) | 195° ↓ (S) |
Sunrise
07:01
Duration
11 h 02 min
Sunset
18:03
Moonrise
00:06
Moonset
10:59
Moon phase
Waning Gibbous
Illumination
54%
+16°C
Weather archive — for 2021 year
Moderate or heavy rain shower
Weather archive — for 2021 year
Nighttime: +14°C
Precipitation: 1.8 mm
Wind: 4 — 6 m/s
Humidity: 93%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +20°C | Sun hours | 9 h |
| UV index | 4 | Cloud cover (avg.) | 61% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 7 km | Sea temperature | — |
| Feels like (avg.) | +16°C | Dew point (avg.) | +14°C |
| Heat index (avg.) | +16°C | Wind chill (avg.) | +16°C |
| Wind gusts (max.) | 11 m/s | Wind direction (avg.) | 69° → (E) |
Sunrise
07:01
Duration
11 h 02 min
Sunset
18:03
Moonrise
13:59
Moonset
03:52
Moon phase
Waxing Gibbous
Illumination
69%
+14°C
Weather archive — for 2020 year
Cloudy
Weather archive — for 2020 year
Nighttime: +11°C
Precipitation: 0 mm
Wind: 4 — 5 m/s
Humidity: 84%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +17°C | Sun hours | 4 h |
| UV index | 4 | Cloud cover (avg.) | 46% |
| Pressure (avg.) | 759 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +14°C | Dew point (avg.) | +11°C |
| Heat index (avg.) | +14°C | Wind chill (avg.) | +14°C |
| Wind gusts (max.) | 8 m/s | Wind direction (avg.) | 50° ↗ (NE) |
Sunrise
07:01
Duration
11 h 03 min
Sunset
18:04
Moonrise
06:52
Moonset
17:38
Moon phase
New Moon
Illumination
0%
+11°C
Weather archive — for 2019 year
Partly Cloudy
Weather archive — for 2019 year
Nighttime: +9°C
Precipitation: 0 mm
Wind: 8 — 8 m/s
Humidity: 81%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +14°C | Sun hours | 9 h |
| UV index | 3 | Cloud cover (avg.) | 69% |
| Pressure (avg.) | 763 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +9°C | Dew point (avg.) | +9°C |
| Heat index (avg.) | +12°C | Wind chill (avg.) | +9°C |
| Wind gusts (max.) | 14 m/s | Wind direction (avg.) | 203° ↓ (SSW) |
Sunrise
07:02
Duration
11 h 01 min
Sunset
18:03
Moonrise
20:54
Moonset
08:54
Moon phase
Waning Gibbous
Illumination
78%
Weather in Rio Grande Brazil on 18 August in previous years
| Year | Day | Nighttime | Average | Sun | UV | Humidity | Wind |
|---|---|---|---|---|---|---|---|
| 2025 |
+17°C
|
+14°C
|
+15°C | 4 h | 4 | 90% | 6 — 7 m/s |
| 2024 |
+16°C
|
+14°C
|
+15°C | 1 h | 4 | 97% | 7 — 8 m/s |
| 2023 |
+17°C
|
+13°C
|
+16°C | 2 h | 4 | 98% | 3 — 4 m/s |
| 2022 |
+14°C
|
+8°C
|
+12°C | 8 h | 3 | 72% | 9 — 9 m/s |
| 2021 |
+20°C
|
+14°C
|
+16°C | 9 h | 4 | 93% | 4 — 6 m/s |
| 2020 |
+17°C
|
+11°C
|
+14°C | 4 h | 4 | 84% | 4 — 5 m/s |
| 2019 |
+14°C
|
+9°C
|
+11°C | 9 h | 3 | 81% | 8 — 8 m/s |