Climate - Formosa (Argentina)

The climate of Formosa is subtropical, with very mild winters (from late May to mid-August) and very hot, rainy summers (from November to March). In summer, the rains often occur in the form of thunderstorms. Precipitation exceeds 100 mm (4 in) per month from October to April. Winter is the driest season; in July and August, it rains on average for 6/7 days a month.
The city is located in northern Argentina, at 26 degrees south latitude, on the banks of the Paraguay River. Across the river lies the small town of Alberdi, in Paraguay.
Even though the winter is mild, there can sometimes be periods a bit cold, especially at night, when the temperature can drop to around freezing. This typically happens from late May to early September.
During the day it can get hot all year round, in fact, the heat records exceed 30 °C (86 °F) even in winter. From mid-August the temperature rises, and in spring and summer, from September to March, there can be heat waves, in which the temperature reaches 38/40 °C (100/104 °F). In January 2022 it reached 43 °C (109.5 °F), and the average high was 39.4 °C (102.9 °F).

Best Time

---

The best time to visit Formosa goes from May to mid-August, being the one in which the rains are less abundant and the risk of very hot days is lower. It must be said that sometimes it can get cold, especially at night.

Formosa - Climate data

In Formosa, the average temperature of the coldest month (July) is of 17.5 °C (63.5 °F), that of the warmest month (January) is of 28.6 °C (83.5 °F). Here are the average temperatures.
In Formosa, precipitation amounts to 1435 millimeters (56.5 inches) per year: it is therefore quite abundant. It ranges from 45 mm (1.8 in) in the driest month (August) to 175 mm (6.9 in) in the wettest one (April). Here is the average precipitation.
In Formosa, there are on average around 2645 sunshine hours per year. Here are the average hours of sunshine per day.

Formosa - Weather by month

Based on the period 1991-2020

---

In January, the hottest month of the year, the weather in Formosa is usually very hot. The average temperature is of 28.6 °C (84 °F), with a minimum of 22.4 °C (72.4 °F) and a maximum of 34.8 °C (94.7 °F).
On the coldest nights of the month, the temperature usually drops to around 17.5 °C (63 °F). However, it dropped to 13.4 °C (56.1 °F) in January 1991.
On the warmest days of the month, the temperature usually reaches around 39 °C (102 °F). However, it reached 41 °C (105.8 °F) in January 2006.
Precipitation amounts to 165 mm (6.5 in), distributed over 9 days.
The day lasts on average 13 hours and 35 minutes.
There are on average 9 hours of sunshine per day. So, the sun shines 66% of the time.
The average humidity is 69%.
The average wind speed is 13 kph (8 mph).

---

In February, the weather in Formosa is usually very hot and muggy. The average temperature is of 27.9 °C (82 °F), with a minimum of 22 °C (71.6 °F) and a maximum of 33.8 °C (92.9 °F).
On the coldest nights of the month, the temperature usually drops to around 16 °C (61 °F). However, it dropped to 12.4 °C (54.3 °F) in February 1991.
On the warmest days of the month, the temperature usually reaches around 38.5 °C (101 °F). However, it reached 41.3 °C (106.3 °F) in February 2010.
Precipitation amounts to 130 mm (5.1 in), distributed over 9 days.
The day lasts on average 13 hours and 0 minutes.
There are on average 8.5 hours of sunshine per day. So, the sun shines 65% of the time.
The average humidity is 72%. Hence, the air is normally humid.
The average wind speed is 12 kph (8 mph).

---

In March, the weather in Formosa is usually warm to hot and muggy. The average temperature is of 26.6 °C (80 °F), with a minimum of 20.6 °C (69 °F) and a maximum of 32.6 °C (90.7 °F).
On the coldest nights, the temperature usually drops to around 14.5 °C (58 °F). However, it dropped to 7.7 °C (45.9 °F) in March 2012.
On the warmest days, the temperature usually reaches around 37.5 °C (99.5 °F). However, it reached 41.5 °C (106.7 °F) in March 2020.
Precipitation amounts to 145 mm (5.7 in), distributed over 8 days.
The day lasts on average 12 hours and 10 minutes.
There are on average 7.5 hours of sunshine per day. So, the sun shines 61% of the time.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is 12 kph (7 mph).

---

In April, the weather in Formosa is usually warm to hot and muggy. The average temperature is of 23.8 °C (75 °F), with a minimum of 17.9 °C (64.3 °F) and a maximum of 29.6 °C (85.4 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 10 °C (50 °F). However, it dropped to 6 °C (42.8 °F) in April 1999.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 35.5 °C (95.5 °F). However, it reached 38 °C (100.4 °F) in April 2004.
Precipitation amounts to 175 mm (6.9 in), distributed over 9 days.
The day lasts on average 11 hours and 25 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 59% of the time.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is 12 kph (7 mph).

---

In May, the weather in Formosa is usually warm. The average temperature is of 19.9 °C (68 °F), with a minimum of 14.4 °C (57.9 °F) and a maximum of 25.4 °C (77.7 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 6.5 °C (43.5 °F). However, it dropped to -0.1 °C (31.8 °F) in May 2008.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 32.5 °C (90 °F). However, it reached 37 °C (98.6 °F) in May 2009.
Precipitation amounts to 100 mm (3.9 in), distributed over 8 days.
The day lasts on average 10 hours and 50 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 60% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is 12 kph (8 mph).

---

In June, the weather in Formosa is usually warm. The average temperature is of 18.3 °C (65 °F), with a minimum of 12.8 °C (55.1 °F) and a maximum of 23.8 °C (74.9 °F).
On the coldest nights, the temperature usually drops to around 3.5 °C (38.5 °F). However, it dropped to -1 °C (30.2 °F) in June 1996.
On the warmest days, the temperature usually reaches around 30.5 °C (87 °F). However, it reached 34 °C (93.2 °F) in June 2020.
Precipitation amounts to 70 mm (2.8 in), distributed over 7 days.
The day lasts on average 10 hours and 30 minutes. June 21, the winter solstice, is the shortest day of the year in the Southern Hemisphere.
There are on average 5.5 hours of sunshine per day. So, the sun shines 54% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is 13 kph (8 mph).

---

In July, the coldest month of the year, the weather in Formosa is usually very mild. The average temperature is of 17.5 °C (63 °F), with a minimum of 11.2 °C (52.2 °F) and a maximum of 23.8 °C (74.8 °F).
On the coldest nights of the month, the temperature usually drops to around 1.5 °C (34.5 °F). However, it dropped to -1.4 °C (29.5 °F) in July 2000.
On the warmest days of the month, the temperature usually reaches around 31.5 °C (89 °F). However, it reached 34 °C (93.2 °F) in July 2003.
Precipitation amounts to 50 mm (2 in), distributed over 6 days.
The day lasts on average 10 hours and 40 minutes.
There are on average 6 hours of sunshine per day. So, the sun shines 58% of the time.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is 14 kph (8 mph).

---

In August, the weather in Formosa is usually warm. However, there are remarkable differences between night and day. The average temperature is of 19.5 °C (67 °F), with a minimum of 12.6 °C (54.6 °F) and a maximum of 26.4 °C (79.6 °F).
On the coldest nights of the month, the temperature usually drops to around 3.5 °C (38 °F). However, it dropped to -2 °C (28.4 °F) in August 1993.
On the warmest days of the month, the temperature usually reaches around 35 °C (95.5 °F). However, it reached 39.3 °C (102.7 °F) in August 2020.
Precipitation amounts to 45 mm (1.8 in), distributed over 6 days.
The day lasts on average 11 hours and 20 minutes.
There are on average 6 hours of sunshine per day. So, the sun shines 51% of the time.
The average humidity is 67%.
The average wind speed is 15 kph (9 mph).

---

In September, the weather in Formosa is usually warm. However, there are remarkable differences between night and day. The average temperature is of 21.5 °C (71 °F), with a minimum of 14.6 °C (58.3 °F) and a maximum of 28.3 °C (83 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 5.5 °C (41.5 °F). However, it dropped to 1.9 °C (35.4 °F) in September 2001.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 37.5 °C (99 °F). However, it reached 42 °C (107.6 °F) in September 2020.
Precipitation amounts to 90 mm (3.5 in), distributed over 8 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 6 hours of sunshine per day. So, the sun shines 52% of the time.
The average humidity is 66%.
The average wind speed is 15 kph (10 mph).

---

In October, the weather in Formosa is usually warm to hot and muggy. The average temperature is of 24.4 °C (76 °F), with a minimum of 18.1 °C (64.6 °F) and a maximum of 30.7 °C (87.3 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 11 °C (51.5 °F). However, it dropped to 6 °C (42.8 °F) in October 2010.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 38.5 °C (101 °F). However, it reached 43.7 °C (110.7 °F) in October 2014.
Precipitation amounts to 140 mm (5.5 in), distributed over 10 days.
The day lasts on average 12 hours and 40 minutes.
There are on average 7.5 hours of sunshine per day. So, the sun shines 59% of the time.
The average humidity is 70%. Hence, the air is normally humid.
The average wind speed is 16 kph (10 mph).

---

In November, the weather in Formosa is usually warm to hot. The average temperature is of 25.6 °C (78 °F), with a minimum of 19.2 °C (66.6 °F) and a maximum of 31.9 °C (89.4 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 13 °C (55 °F). However, it dropped to 9 °C (48.2 °F) in November 2000.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 38 °C (100.5 °F). However, it reached 41 °C (105.8 °F) in November 2003.
Precipitation amounts to 165 mm (6.5 in), distributed over 9 days.
The day lasts on average 13 hours and 25 minutes.
There are on average 8.5 hours of sunshine per day. So, the sun shines 63% of the time.
The average humidity is 68%.
The average wind speed is 14 kph (9 mph).

---

In December, the weather in Formosa is usually very hot. The average temperature is of 27.6 °C (82 °F), with a minimum of 21.3 °C (70.4 °F) and a maximum of 33.9 °C (93.1 °F).
On the coldest nights of the month, the temperature usually drops to around 15.5 °C (59.5 °F). However, it dropped to 10 °C (50 °F) in December 2001.
On the warmest days of the month, the temperature usually reaches around 38.5 °C (101.5 °F). However, it reached 42.2 °C (108 °F) in December 2008.
Precipitation amounts to 165 mm (6.5 in), distributed over 9 days.
The day lasts on average 13 hours and 50 minutes. December 21, the summer solstice, is the longest day of the year in the Southern Hemisphere.
There are on average 9 hours of sunshine per day. So, the sun shines 66% of the time.
The average humidity is 69%.
The average wind speed is 13 kph (8 mph).