Posadas, Argentina experiences average highs of 26°C (79°F) and lows of 18°C (64°F) throughout the year. Rainfall is moderate, averaging about 9 rainy days per month. Sunshine is abundant, averaging about 9 hours per day. Average highs have warmed by 1.1°C (2.0°F) across the available records.
Posadas, Argentina Weather & Climate 2026
Monthly climate averages for Posadas, Argentina. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Feb–Dec 
Wetter season: Jan–Oct At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
7.3/10
Best: April, July, August, September, October
UV Index
6
High
Temperature 26°C / 18°C
Feels Like 29°C / 18°C
Rainy Days 9
Rainfall 125 mm
Sunshine 9 h
Humidity 75%
Wind Speed 16 km/h
Dew Point 17°C
Hottest Month
32°C
January
Avg Low23°C
Rain11days
Coldest Month
12°C
July
Avg High21°C
Rain6days
Driest Month
6days
July
Avg High21°C
Avg Low12°C
Windiest Month
18 km/h
October (Gusts 35)
Worst Time to Visit
Consider avoiding January, February, December due to extreme heat, frequent rain, oppressive humidity.
Sun Position
Sunrise 07:33
Daylight 10.4h
Sunset 17:58
Live conditions—
Posadas on the map · live conditions
Posadas, Argentina
- Continent
- Americas
- Country
- Argentina
- City
- Posadas
- Population
- 305.9K
- Elevation
- 83 m
- Coordinates
- -27.39°, -55.92°
Seasonal Breakdown
Spring
Sep–Nov
Avg High 27°C
Avg Low 18°C
Rain 10 days/mo
2/3 best months
Summer
Dec–Feb
Avg High 31°C
Avg Low 22°C
Rain 10 days/mo
Autumn
Mar–May
Avg High 26°C
Avg Low 18°C
Rain 10 days/mo
1/3 best months
Winter
Jun–Aug
Avg High 21°C
Avg Low 13°C
Rain 7 days/mo
2/3 best months
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 32°C / 23°C . Feb: 31°C / 23°C . Mar: 30°C / 21°C . Apr: 27°C / 19°C . May: 22°C / 15°C . Jun: 20°C / 13°C . Jul: 21°C / 12°C . Aug: 23°C / 13°C . Sep: 26°C / 16°C . Oct: 27°C / 18°C . Nov: 29°C / 19°C . Dec: 31°C / 22°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 106 mm. Feb: 78 mm. Mar: 115 mm. Apr: 147 mm. May: 181 mm. Jun: 103 mm. Jul: 71 mm. Aug: 89 mm. Sep: 110 mm. Oct: 205 mm. Nov: 145 mm. Dec: 144 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 71%. Feb: 71%. Mar: 73%. Apr: 77%. May: 81%. Jun: 81%. Jul: 77%. Aug: 74%. Sep: 74%. Oct: 75%. Nov: 71%. Dec: 70%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 15 km/h . Feb: 14 km/h . Mar: 15 km/h . Apr: 15 km/h . May: 15 km/h . Jun: 16 km/h . Jul: 16 km/h . Aug: 18 km/h . Sep: 17 km/h . Oct: 18 km/h . Nov: 17 km/h . Dec: 15 km/h .
Sunshine
Sunshine
Sunshine: Jan: 11h. Feb: 11h. Mar: 10h. Apr: 9h. May: 7h. Jun: 7h. Jul: 8h. Aug: 9h. Sep: 9h. Oct: 9h. Nov: 11h. Dec: 12h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 9. Feb: UV 8. Mar: UV 7. Apr: UV 5. May: UV 4. Jun: UV 4. Jul: UV 4. Aug: UV 5. Sep: UV 6. Oct: UV 7. Nov: UV 8. Dec: UV 8.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Climate Trends
Average highs have warmed by 1.1°C (2.0°F) across the available records. Average rainfall has remained broadly steady.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Feb 2025 · 34°C | Jan · 32°C |
| Coldest month | Jul 2025 · 11°C | Jul · 12°C |
| Wettest month | Dec 2025 · 271 mm | Oct · 205 mm |
| Windiest month | Oct 2025 · 19 km/h | Oct · 18 km/h |
Month-by-Month Weather Table
January
Fair 
February
Fair March
Good April best
Excellent May
Good June
Good July best
Excellent August best
Excellent September best
Excellent October best
Excellent November
Good December
Fair | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 32°C / 23°C | 36°C / 26°C | 11days (106 mm) Wet | 11.2h Excellent | 71% Muggy | 9 Very High | Fair | View Details |
| February | 31°C / 23°C | 36°C / 25°C | 10days (78 mm) Wet | 10.9h Excellent | 71% Muggy | 8.2 Very High | Fair | View Details |
| March | 30°C / 21°C | 33°C / 23°C | 10days (115 mm) Wet | 9.9h Good | 73% Muggy | 7.3 Very High | Good | View Details |
| April best | 27°C / 19°C | 29°C / 19°C | 9days (147 mm) Wet | 8.6h Good | 77% Humid | 5.4 High | Excellent | View Details |
| May | 22°C / 15°C | 23°C / 15°C | 11days (181 mm) Wet | 6.8h Fair | 81% Humid | 4.1 Moderate | Good | View Details |
| June | 20°C / 13°C | 21°C / 12°C | 7days (103 mm) Good | 7h Good | 81% Humid | 3.6 Moderate | Good | View Details |
| July best | 21°C / 12°C | 21°C / 11°C | 6days (71 mm) Good | 7.7h Good | 77% Humid | 3.9 Moderate | Excellent | View Details |
| August best | 23°C / 13°C | 23°C / 12°C | 7days (89 mm) Good | 8.6h Good | 74% Muggy | 5.2 High | Excellent | View Details |
| September best | 26°C / 16°C | 27°C / 15°C | 9days (110 mm) Wet | 9h Good | 74% Muggy | 6.4 High | Excellent | View Details |
| October best | 27°C / 18°C | 29°C / 18°C | 12days (205 mm) Wet | 9.4h Good | 75% Muggy | 7 High | Excellent | View Details |
| November | 29°C / 19°C | 32°C / 20°C | 10days (145 mm) Wet | 10.6h Excellent | 71% Muggy | 7.8 Very High | Good | View Details |
| December | 31°C / 22°C | 35°C / 24°C | 10days (144 mm) Wet | 11.5h Excellent | 70% Muggy | 8.1 Very High | Fair | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Posadas are April, July, August, September, October, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Posadas, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Posadas is January, with average daytime highs of 32°C (89°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Posadas is July, with average overnight lows of 12°C (54°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Posadas is October, averaging 205mm of precipitation across 12 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Posadas runs through October, January, May, February, with the heaviest rainfall in October. Based on 10-year averages for Posadas.
Posadas receives approximately 111 sunshine hours per year. The sunniest month is December with around 12 hours. Based on climate data for Posadas.
The least favorable months to visit Posadas are January, February, December, primarily due to extreme heat, frequent rain, oppressive humidity. For the best conditions, consider April, July, August, September, October instead.
The annual average UV index in Posadas is 6, classified as high. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Posadas is 75%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Average wind speeds in Posadas are 16 km/h (10 mph). The windiest month is October with peak winds reaching 18 km/h (11 mph) (gusts up to 35 km/h / 22 mph).
Posadas averages 10 clear-sky days per month with overall cloud cover around 45%. The clearest skies occur in August.
The annual average dew point in Posadas is 17°C (63°F), which feels noticeably humid. Summer months may feel slightly sticky, but conditions remain manageable for most people.
Posadas has a Humid Subtropical climate, classified as Cfa under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Posadas ranges from 18°C (64°F) to 29°C (84°F) on average. Humidity and radiant heat mean it often feels warmer than the thermometer reads, especially in summer months.
Yes, June is a great time to visit Posadas. It earns a climate score of 7.9/10 with Good.
For June in Posadas, pack Umbrella, Sunscreen (SPF 30+), Sunglasses, Comfortable walking shoes. With average highs of 20°C (69°F) and 7 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
Last updated: