Santa Fe, Argentina — Weather in September 2026

Monthly climate averages for Santa Fe, Argentina. Based on 10-year ERA5 reanalysis data.

Cfa Humid Subtropical
8.9 /10
Excellent

September is an excellent month in Santa Fe

Climate Overview

Santa Fe, Argentina in September has warm conditions, with highs averaging 22.5°C (73°F). Temperatures drop noticeably between day and night.

This month falls at the beginning of Spring.

Daily highs in September gradually rise from around 19°C (66°F) at the start to 25°C (77°F) by month's end.

Rainfall is heaviest during the first third of the month, while the last third tends to be drier.

Expect around 7.7h of sunshine at the start of September, increasing to 9.5h by the end.

The warmest days tend to fall around the 30th, averaging 25.6°C (78°F).

Compared to August, this month is about 3°C warmer with 0 fewer rainy days. Temperatures will rise further into October.

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Monthly September Averages

Temperature
23°C / 12°C
Feels Like
22°C / 10°C
Rain
4 days · 35 mm
Sunshine
9.3h / day
Humidity
65% — Humid
Wind
19 km/h
Wind Direction
ESE (106°)
Gusts
36 km/h
Daylight
11.9 h
Cloud Cover
39%
Clear Sky Days
12.7
UV Index
5.9 — High
Dew Point
11°C — Comfortable
Moon Phase
Waxing Crescent · 11%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

32°C 28°C 24°C 20°C 16°C 12°C 8°C 4°C 151015202530
High Low

Daily Precipitation

0 mm 2 mm 4 mm 6 mm 151015202530
Rainfall

Daily Sunshine

0h 3h 6h 9h 12h 151015202530
Sunshine

Daily Wind Speed

0 5 10 15 20 25 151015202530
Wind Speed
Sun Position
Sunrise 07:01
Daylight 11.9h
Sunset 18:55

What to Expect

Daytime temperatures around 23°C (73°F) are ideal for full-day outdoor exploration.

Rain is uncommon in this month, so most days stay dry from morning through evening.

1 of the last 5 yearly records were warmer than this month's long-run average.

Compare Months

January
Good
Temp
31°C / 22°C
Feels Like
35°C / 23°C
Rain
8days (108 mm) Wet
Sun
11.6h Excellent
Humidity
63% Muggy
UV
8.7 Very High
View Details
February
Good
Temp
31°C / 21°C
Feels Like
34°C / 23°C
Rain
7days (96 mm) Good
Sun
11.1h Excellent
Humidity
66% Muggy
UV
8 Very High
View Details
March best
Excellent
Temp
28°C / 19°C
Feels Like
30°C / 20°C
Rain
8days (120 mm) Wet
Sun
9.8h Good
Humidity
70% Muggy
UV
6.8 High
View Details
April best
Excellent
Temp
24°C / 16°C
Feels Like
24°C / 16°C
Rain
9days (106 mm) Wet
Sun
8.1h Good
Humidity
75% Muggy
UV
4.4 Moderate
View Details
May
Good
Temp
19°C / 12°C
Feels Like
19°C / 11°C
Rain
6days (69 mm) Good
Sun
7.2h Good
Humidity
77% Humid
UV
3.6 Moderate
View Details
June
Good
Temp
17°C / 9°C
Feels Like
16°C / 7°C
Rain
3days (29 mm) Excellent
Sun
7.3h Good
Humidity
78% Humid
UV
3.1 Moderate
View Details
July
Good
Temp
17°C / 9°C
Feels Like
15°C / 6°C
Rain
4days (38 mm) Good
Sun
7.1h Good
Humidity
76% Humid
UV
3.3 Moderate
View Details
August
Good
Temp
20°C / 10°C
Feels Like
18°C / 7°C
Rain
4days (36 mm) Good
Sun
8.8h Good
Humidity
69% Muggy
UV
4.6 Moderate
View Details
September best
Excellent
Temp
23°C / 12°C
Feels Like
22°C / 10°C
Rain
4days (35 mm) Good
Sun
9.3h Good
Humidity
65% Muggy
UV
5.9 High
View Details
October best
Excellent
Temp
25°C / 15°C
Feels Like
25°C / 13°C
Rain
8days (89 mm) Wet
Sun
9.9h Good
Humidity
63% Muggy
UV
7.3 Very High
View Details
November best
Excellent
Temp
28°C / 17°C
Feels Like
29°C / 17°C
Rain
6days (92 mm) Good
Sun
11.2h Excellent
Humidity
61% Muggy
UV
8.1 Very High
View Details
December
Good
Temp
30°C / 20°C
Feels Like
32°C / 20°C
Rain
8days (102 mm) Wet
Sun
11.8h Excellent
Humidity
62% Muggy
UV
8.5 Very High
View Details
Month Temp Feels Like Rain Sun Humidity UV Status
January 31°C / 22°C 35°C / 23°C 8days (108 mm) Wet 11.6h Excellent 63% Muggy 8.7 Very High Good View Details
February 31°C / 21°C 34°C / 23°C 7days (96 mm) Good 11.1h Excellent 66% Muggy 8 Very High Good View Details
March best 28°C / 19°C 30°C / 20°C 8days (120 mm) Wet 9.8h Good 70% Muggy 6.8 High Excellent View Details
April best 24°C / 16°C 24°C / 16°C 9days (106 mm) Wet 8.1h Good 75% Muggy 4.4 Moderate Excellent View Details
May 19°C / 12°C 19°C / 11°C 6days (69 mm) Good 7.2h Good 77% Humid 3.6 Moderate Good View Details
June 17°C / 9°C 16°C / 7°C 3days (29 mm) Excellent 7.3h Good 78% Humid 3.1 Moderate Good View Details
July 17°C / 9°C 15°C / 6°C 4days (38 mm) Good 7.1h Good 76% Humid 3.3 Moderate Good View Details
August 20°C / 10°C 18°C / 7°C 4days (36 mm) Good 8.8h Good 69% Muggy 4.6 Moderate Good View Details
September best 23°C / 12°C 22°C / 10°C 4days (35 mm) Good 9.3h Good 65% Muggy 5.9 High Excellent View Details
October best 25°C / 15°C 25°C / 13°C 8days (89 mm) Wet 9.9h Good 63% Muggy 7.3 Very High Excellent View Details
November best 28°C / 17°C 29°C / 17°C 6days (92 mm) Good 11.2h Excellent 61% Muggy 8.1 Very High Excellent View Details
December 30°C / 20°C 32°C / 20°C 8days (102 mm) Wet 11.8h Excellent 62% Muggy 8.5 Very High Good View Details

What to Wear

Dress in layers — a mix of long sleeves, light sweaters, and a versatile jacket works best for changeable conditions.

Temperatures drop significantly at night, so pack layers you can add or remove throughout the day.

Packing List

Warm evening layerSunscreen (SPF 30+)SunglassesComfortable walking shoes

Frequently Asked Questions

September is typically excellent for visiting Santa Fe, with average highs of 23°C (73°F) and around 4 rainy days. Santa Fe, Argentina in September has warm conditions, with highs averaging 22.5°C (73°F). Temperatures drop noticeably b
Santa Fe typically sees around 4 rainy days in September with 35 mm (1.4 in) of total rainfall. An umbrella should suffice.
Nights in Santa Fe during September are cool at around 12°C (53°F). Bring a jacket or sweater for evenings.
With highs of 23°C (73°F) and lows of 12°C (53°F) in September, we recommend: Warm evening layer, Sunscreen (SPF 30+), Sunglasses, Comfortable walking shoes. Comfortable walking shoes are essential.
Yes, September offers some of the best weather conditions in Santa Fe with comfortable temperatures and lower chances of rain.
The average UV index in Santa Fe during September is 6 (high). Wear sunscreen SPF 30+, a hat, and sunglasses. Limit direct sun exposure between 10 AM and 4 PM.
Santa Fe gets approximately 12 hours of daylight per day in September, with around 9 hours of sunshine.
Snow is uncommon in Santa Fe during September based on 10-year climate averages.

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