Climate - Santa Fe (Argentina)

The climate of Santa Fe (Santa Fe de la Vera Cruz) is subtropical, with mild, quite dry winters (from mid-May to mid-August) and hot, rainy summers (from December to February). In summer, the rains often occur in the form of thunderstorms.
The city is located in north-central Argentina, at 31 degrees south latitude, on the eastern edge of the Pampa, on the banks of the Salado del Norte River, which then flows into the Paraná south of the city. A short distance away is the city of Paraná, across the river of the same name, which flows a few kilometers to the east.
We are in an area where the waters of the rivers have created some lagoons over the centuries. The closest to Santa Fe is the Setúbal lagoon.
As a result of very heavy rains, the waters of the rivers can flood part of the city, as happened in April 2003 and March 2007.
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 or a little below. This typically happens from late May to early September. At Sauce Viejo airport, the temperature dropped to -7 °C (19.5 °F) in July 2004 and to -5 °C (23 °F) in July 2010.
During the day it can get hot all year round, in fact, the heat records are around 30 °C (86 °F) even in winter, in July and August. On the other hand, from September to February, there can be heat waves, in which the temperature reaches or exceeds 38/40 °C (100/104 °F). In January 2022 it reached 41.9 °C (107.4 °F).
But the Pampero, the south wind, is able to interrupt the hot and muggy periods, bringing pleasant temperatures (and sometimes even very cool) for two or three days.

Best Time

---

It is difficult to find the best time to visit Santa Fe, also because there can be sudden changes in temperature. Anyway, you can choose the period from mid-April to mid-May, in which both temperature and rainfall are halfway between winter and summer.
Winter, from mid-May to mid-August, is the mildest and driest season of the year, but sometimes it can get cold, especially at night.
In spring, starting from mid-August, it can be very hot. Summer is the sunniest season, but it is hot and muggy, and thunderstorms can break out.

Santa Fe - Climate data

In Santa Fe, the average temperature of the coldest month (July) is of 12.2 °C (54.0 °F), that of the warmest month (January) is of 26.2 °C (79.2 °F). Here are the average temperatures.
In Santa Fe, precipitation amounts to 1020 millimeters (40.2 inches) per year: it is therefore quite abundant. It ranges from 25 mm (1 in) in the driest month (July) to 145 mm (5.7 in) in the wettest one (March). Here is the average precipitation.
In Santa Fe, there are on average around 2405 sunshine hours per year. Here are the average hours of sunshine per day.

Santa Fe - Weather by month

Based on the period 1991-2020

---

In January, the hottest month of the year, the weather in Santa Fe is usually warm to hot. The average temperature is of 26.2 °C (79 °F), with a minimum of 20.1 °C (68.1 °F) and a maximum of 32.3 °C (90.2 °F).
On the coldest nights of the month, the temperature usually drops to around 13.5 °C (56 °F).
On the warmest days of the month, the temperature usually reaches around 37.5 °C (100 °F). However, it reached 41.7 °C (107.1 °F) in January 2006.
Precipitation amounts to 95 mm (3.7 in), distributed over 7 days.
The day lasts on average 13 hours and 55 minutes.
There are on average 8.5 hours of sunshine per day. So, the sun shines 63% of the time.
The average humidity is 66%.
The average wind speed is 11 kph (7 mph).

---

In February, the weather in Santa Fe is usually warm to hot and muggy. The average temperature is of 24.9 °C (77 °F), with a minimum of 19 °C (66.3 °F) and a maximum of 30.8 °C (87.4 °F).
On the coldest nights of the month, the temperature usually drops to around 12 °C (53.5 °F).
On the warmest days of the month, the temperature usually reaches around 36 °C (97 °F). However, it reached 40.1 °C (104.2 °F) in February 2003.
Precipitation amounts to 110 mm (4.3 in), distributed over 7 days.
The day lasts on average 13 hours and 10 minutes.
There are on average 8.5 hours of sunshine per day. So, the sun shines 65% of the time.
The average humidity is 70%. Hence, the air is normally humid.
The average wind speed is 11 kph (7 mph).

---

In March, the weather in Santa Fe is usually warm to hot and muggy. The average temperature is of 23.2 °C (74 °F), with a minimum of 17.4 °C (63.3 °F) and a maximum of 28.9 °C (84 °F).
On the coldest nights, the temperature usually drops to around 10 °C (50 °F).
On the warmest days, the temperature usually reaches around 34.5 °C (94 °F). However, it reached 37.7 °C (99.9 °F) in March 2001.
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 hours of sunshine per day. So, the sun shines 56% of the time.
The average humidity is 72%. Hence, the air is normally humid.
The average wind speed is 10 kph (6 mph).

---

In April, the weather in Santa Fe is usually warm. The average temperature is of 19.6 °C (67 °F), with a minimum of 13.9 °C (57 °F) and a maximum of 25.3 °C (77.6 °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).
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 32 °C (90 °F). However, it reached 36 °C (96.8 °F) in April 2018.
Precipitation amounts to 115 mm (4.5 in), distributed over 8 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 53% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is 11 kph (7 mph).

---

In May, the weather in Santa Fe is usually very mild. The average temperature is of 16.2 °C (61 °F), with a minimum of 10.7 °C (51.2 °F) and a maximum of 21.6 °C (70.9 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 2 °C (35.5 °F).
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 29 °C (84 °F). However, it reached 36 °C (96.8 °F) in May 1997.
Precipitation amounts to 50 mm (2 in), distributed over 5 days.
The day lasts on average 10 hours and 30 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 51% of the time.
The average humidity is 78%. Hence, the air is normally humid.
The average wind speed is 11 kph (7 mph).

---

In June, the weather in Santa Fe is usually mild. The average temperature is of 13.1 °C (56 °F), with a minimum of 7.4 °C (45.4 °F) and a maximum of 18.7 °C (65.7 °F).
On the coldest nights, the temperature usually drops to around -1.5 °C (29.5 °F).
On the warmest days, the temperature usually reaches around 26 °C (79 °F). However, it reached 30.9 °C (87.6 °F) in June 2015.
Precipitation amounts to 30 mm (1.2 in), distributed over 4 days.
The day lasts on average 10 hours and 5 minutes. June 21, the winter solstice, is the shortest day of the year in the Southern Hemisphere.
There are on average 4.5 hours of sunshine per day. So, the sun shines 45% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is 12 kph (7 mph).

---

In July, the coldest month of the year, the weather in Santa Fe is usually mild. The average temperature is of 12.2 °C (54 °F), with a minimum of 6.1 °C (43 °F) and a maximum of 18.3 °C (65 °F).
On the coldest nights of the month, the temperature usually drops to around -2.5 °C (27.5 °F).
On the warmest days of the month, the temperature usually reaches around 27.5 °C (81.5 °F). However, it reached 33.7 °C (92.7 °F) in July 1997.
Precipitation amounts to 25 mm (1 in), distributed over 3 days.
The day lasts on average 10 hours and 20 minutes.
There are on average 5 hours of sunshine per day. So, the sun shines 46% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is 13 kph (8 mph).

---

In August, the weather in Santa Fe is usually mild. However, there are remarkable differences between night and day. The average temperature is of 14.5 °C (58 °F), with a minimum of 7.9 °C (46.2 °F) and a maximum of 21.1 °C (70 °F).
On the coldest nights of the month, the temperature usually drops to around -0.5 °C (30.5 °F).
On the warmest days of the month, the temperature usually reaches around 31 °C (87.5 °F). However, it reached 38.6 °C (101.5 °F) in August 2009.
Precipitation amounts to 30 mm (1.2 in), distributed over 3 days.
The day lasts on average 11 hours and 0 minutes.
There are on average 6 hours of sunshine per day. So, the sun shines 53% of the time.
The average humidity is 69%.
The average wind speed is 15 kph (9 mph).

---

In September, the weather in Santa Fe is usually very mild. The average temperature is of 16.9 °C (62 °F), with a minimum of 10.5 °C (50.9 °F) and a maximum of 23.3 °C (73.9 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 1.5 °C (34.5 °F).
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 39 °C (102.2 °F) in September 2013.
Precipitation amounts to 55 mm (2.2 in), distributed over 5 days.
The day lasts on average 11 hours and 55 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 48% of the time.
The average humidity is 66%.
The average wind speed is 15 kph (9 mph).

---

In October, the weather in Santa Fe is usually warm. The average temperature is of 20.0 °C (68 °F), with a minimum of 13.8 °C (56.9 °F) and a maximum of 26.1 °C (79 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 5.5 °C (42 °F).
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 34 °C (93.5 °F). However, it reached 41 °C (105.8 °F) in October 2009.
Precipitation amounts to 110 mm (4.3 in), distributed over 7 days.
The day lasts on average 12 hours and 55 minutes.
There are on average 7 hours of sunshine per day. So, the sun shines 54% of the time.
The average humidity is 67%.
The average wind speed is 15 kph (9 mph).

---

In November, the weather in Santa Fe is usually warm to hot. The average temperature is of 22.6 °C (73 °F), with a minimum of 16.4 °C (61.4 °F) and a maximum of 28.7 °C (83.7 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 9.5 °C (49 °F).
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 39 °C (102.2 °F) in November 2020.
Precipitation amounts to 130 mm (5.1 in), distributed over 8 days.
The day lasts on average 13 hours and 50 minutes.
There are on average 8 hours of sunshine per day. So, the sun shines 58% of the time.
The average humidity is 65%.
The average wind speed is 14 kph (9 mph).

---

In December, the weather in Santa Fe is usually warm to hot. The average temperature is of 24.9 °C (77 °F), with a minimum of 18.7 °C (65.7 °F) and a maximum of 31 °C (87.7 °F).
On the coldest nights of the month, the temperature usually drops to around 12 °C (54 °F).
On the warmest days of the month, the temperature usually reaches around 36.5 °C (98 °F). However, it reached 41.5 °C (106.7 °F) in December 2013.
Precipitation amounts to 125 mm (4.9 in), distributed over 8 days.
The day lasts on average 14 hours and 10 minutes. So the days are long. December 21, the summer solstice, is the longest day of the year in the Southern Hemisphere.
There are on average 8 hours of sunshine per day. So, the sun shines 55% of the time.
The average humidity is 65%.
The average wind speed is 12 kph (8 mph).