Formosa, Argentina experiences average highs of 28°C (82°F) and lows of 19°C (66°F) throughout the year. Rainfall is moderate, averaging about 8 rainy days per month. Sunshine is abundant, averaging about 9 hours per day. Average highs have warmed by 0.9°C (1.6°F) across the available records.
Formosa, Argentina Weather & Climate 2026
Monthly climate averages for Formosa, Argentina. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Feb–Dec 
Wetter season: Jan–Nov At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
7.2/10
Best: April, July, August, September, October
UV Index
7
High
Temperature 28°C / 19°C
Feels Like 30°C / 19°C
Rainy Days 8
Rainfall 108 mm
Sunshine 9 h
Humidity 70%
Wind Speed 18 km/h
Dew Point 17°C
Hottest Month
33°C
January
Avg Low24°C
Rain10days
Coldest Month
13°C
July
Avg High22°C
Rain5days
Driest Month
5days
July
Avg High22°C
Avg Low13°C
Windiest Month
20 km/h
August (Gusts 38)
Worst Time to Visit
Consider avoiding January, December due to extreme heat.
Sun Position
Sunrise 07:39
Daylight 10.5h
Sunset 18:10
Live conditions—
Formosa on the map · live conditions
Formosa, Argentina
- Continent
- Americas
- Country
- Argentina
- City
- Formosa
- Population
- 222.2K
- Coordinates
- -26.18°, -58.17°
Seasonal Breakdown
Spring
Sep–Nov
Avg High 28°C
Avg Low 19°C
Rain 9 days/mo
2/3 best months
Summer
Dec–Feb
Avg High 33°C
Avg Low 23°C
Rain 9 days/mo
Autumn
Mar–May
Avg High 27°C
Avg Low 19°C
Rain 9 days/mo
1/3 best months
Winter
Jun–Aug
Avg High 23°C
Avg Low 14°C
Rain 6 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: 33°C / 24°C . Feb: 33°C / 24°C . Mar: 31°C / 22°C . Apr: 28°C / 19°C . May: 23°C / 16°C . Jun: 21°C / 14°C . Jul: 22°C / 13°C . Aug: 25°C / 14°C . Sep: 27°C / 17°C . Oct: 28°C / 19°C . Nov: 30°C / 20°C . Dec: 32°C / 23°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 105 mm. Feb: 75 mm. Mar: 99 mm. Apr: 135 mm. May: 153 mm. Jun: 74 mm. Jul: 48 mm. Aug: 56 mm. Sep: 93 mm. Oct: 180 mm. Nov: 159 mm. Dec: 115 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 65%. Feb: 65%. Mar: 68%. Apr: 74%. May: 78%. Jun: 76%. Jul: 72%. Aug: 66%. Sep: 67%. Oct: 70%. Nov: 68%. Dec: 66%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 17 km/h . Feb: 16 km/h . Mar: 17 km/h . Apr: 17 km/h . May: 17 km/h . Jun: 18 km/h . Jul: 18 km/h . Aug: 20 km/h . Sep: 20 km/h . Oct: 20 km/h . Nov: 19 km/h . Dec: 18 km/h .
Sunshine
Sunshine
Sunshine: Jan: 11h. Feb: 11h. Mar: 10h. Apr: 9h. May: 7h. Jun: 7h. Jul: 8h. Aug: 9h. Sep: 9h. Oct: 10h. Nov: 11h. Dec: 11h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 9. Feb: UV 9. Mar: UV 7. Apr: UV 6. May: UV 4. Jun: UV 4. Jul: UV 4. Aug: UV 5. Sep: UV 7. Oct: UV 8. Nov: UV 8. Dec: UV 9.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Climate Trends
Average highs have warmed by 0.9°C (1.6°F) across the available records. Average rainfall is trending drier by about 9 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Feb 2025 · 35°C | Jan · 33°C |
| Coldest month | Jul 2025 · 12°C | Jul · 13°C |
| Wettest month | May 2025 · 245 mm | Oct · 180 mm |
| Windiest month | Oct 2025 · 21 km/h | Aug · 20 km/h |
Month-by-Month Weather Table
January
Poor 
February
Fair March
Fair 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 | 33°C / 24°C | 38°C / 27°C | 10days (105 mm) Wet | 11.2h Excellent | 65% Muggy | 9.2 Very High | Poor | View Details |
| February | 33°C / 24°C | 37°C / 26°C | 7days (75 mm) Good | 10.9h Excellent | 65% Muggy | 8.5 Very High | Fair | View Details |
| March | 31°C / 22°C | 34°C / 24°C | 9days (99 mm) Wet | 9.9h Good | 68% Muggy | 7.4 Very High | Fair | View Details |
| April best | 28°C / 19°C | 30°C / 20°C | 9days (135 mm) Wet | 8.5h Good | 74% Muggy | 5.6 High | Excellent | View Details |
| May | 23°C / 16°C | 24°C / 15°C | 10days (153 mm) Wet | 6.8h Fair | 78% Humid | 4.3 Moderate | Good | View Details |
| June | 21°C / 14°C | 21°C / 12°C | 7days (74 mm) Good | 7.2h Good | 76% Humid | 3.8 Moderate | Good | View Details |
| July best | 22°C / 13°C | 22°C / 12°C | 5days (48 mm) Good | 8h Good | 72% Muggy | 4.3 Moderate | Excellent | View Details |
| August best | 25°C / 14°C | 24°C / 12°C | 5days (56 mm) Good | 8.9h Good | 66% Muggy | 5.3 High | Excellent | View Details |
| September best | 27°C / 17°C | 28°C / 16°C | 7days (93 mm) Good | 9.2h Good | 67% Muggy | 6.7 High | Excellent | View Details |
| October best | 28°C / 19°C | 30°C / 19°C | 10days (180 mm) Wet | 9.5h Good | 70% Muggy | 7.5 Very High | Excellent | View Details |
| November | 30°C / 20°C | 33°C / 21°C | 10days (159 mm) Wet | 10.6h Excellent | 68% Muggy | 8.3 Very High | Good | View Details |
| December | 32°C / 23°C | 36°C / 24°C | 9days (115 mm) Wet | 11.3h Excellent | 66% Muggy | 8.6 Very High | Fair | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Formosa 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 Formosa, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Formosa is January, with average daytime highs of 33°C (92°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Formosa is July, with average overnight lows of 13°C (56°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Formosa is October, averaging 180mm of precipitation across 10 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Formosa runs through January, May, October, November, with the heaviest rainfall in January. Based on 10-year averages for Formosa.
Formosa receives approximately 112 sunshine hours per year. The sunniest month is December with around 11 hours. Based on climate data for Formosa.
The least favorable months to visit Formosa are January, December, primarily due to extreme heat. For the best conditions, consider April, July, August, September, October instead.
The annual average UV index in Formosa is 7, classified as high. SPF 30+ sunscreen, sunglasses, and seeking shade between 10:00–16:00 are strongly recommended.
Average humidity in Formosa is 70%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Average wind speeds in Formosa are 18 km/h (11 mph). The windiest month is August with peak winds reaching 20 km/h (13 mph) (gusts up to 38 km/h / 24 mph).
Formosa averages 10 clear-sky days per month with overall cloud cover around 44%. The clearest skies occur in August.
The annual average dew point in Formosa is 17°C (63°F), which feels noticeably humid. Summer months may feel slightly sticky, but conditions remain manageable for most people.
Formosa 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 Formosa ranges from 19°C (66°F) to 30°C (86°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
Yes, June is a great time to visit Formosa. It earns a climate score of 8.2/10 with Good.
For June in Formosa, pack Umbrella, Sunscreen (SPF 30+), Sunglasses, Comfortable walking shoes. With average highs of 21°C (71°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.
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