Cô Tô climate — normals and trends
Cô Tô (Vietnam) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 27.2 °C and it receives 1,844 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is April (28.9 °C on average) and the coldest is January (25.9 °C). Rainfall peaks in October.
Cô Tô averages 0 frost days, 259 hot days (≥ 30 °C) and 225 rainy days per year.
Cô Tô has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.
The hottest day of the period reached 38.9 °C (on 6 May 2002) and the coldest 15.3 °C (on 5 January 1940).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
Cô TôAn Giang
- coords
- 10.35°, 105.02°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
27.2°C
Average daily high
31.0°C
Average daily low
24.5°C
Annual rainfall
1,844mm
Sunshine / day
9.9h
Mean relative humidity
80%
Average peak wind
15.3km/h
Seasonal range
3.0°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
259 d/yr
Rainy days (≥ 1 mm)
225 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.9 °C
Average feels-like low
28.6 °C
Average peak gust
34.0 km/h
Tropical nights (≥ 20 °C)
359 d/yr
Solar radiation
18.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.75 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
38.9 °C
6 May 2002
Coldest day
15.3 °C
5 January 1940
Wettest day
122 mm
12 November 1964
Windiest day
35.1 km/h
22 August 2000
Strongest gust
72.7 km/h
30 October 2010
Hottest feels-like
45.3 °C
5 May 2016
Coldest feels-like
13.3 °C
12 January 1955
Sunniest day
12.1 h
9 July 1951
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 30.1 °C | -0.3 °C | 8 mm | -13 mm |
| Feb | 31.8 °C | 0.0 °C | 38 mm | +21 mm |
| Mar | 33.3 °C | 0.0 °C | 21 mm | -20 mm |
| Apr | 32.9 °C | -0.6 °C | 167 mm | +71 mm |
| May | 32.2 °C | +0.2 °C | 310 mm | +109 mm |
| Jun | 30.7 °C | +0.2 °C | 264 mm | +41 mm |
| Jul | 30.7 °C | +0.7 °C | 140 mm | -91 mm |
| Aug | 31.0 °C | +1.1 °C | 164 mm | -67 mm |
| Sep | 30.6 °C | +0.7 °C | 257 mm | -25 mm |
| Oct | 31.4 °C | +0.9 °C | 379 mm | +77 mm |
| Nov | 30.4 °C | -0.1 °C | 148 mm | +1 mm |
| Dec | 31.5 °C | +1.5 °C | 41 mm | -11 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Cô Tô?
Cô Tô has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.2 °C and it receives 1,844 mm of precipitation per year.
What is the hottest day ever recorded in Cô Tô?
The hottest day measured in Cô Tô between 1940 and 2025 was 6 May 2002, reaching 38.9 °C.
What is the coldest day in Cô Tô?
The coldest day measured in Cô Tô between 1940 and 2025 was 5 January 1940, at 15.3 °C.
Does it snow in Cô Tô?
Almost never: Cô Tô sees virtually no snow, with about 0 frost days per year.
Has the climate of Cô Tô warmed?
Yes: Cô Tô warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Cô Tô?
The wettest day measured in Cô Tô between 1940 and 2025 was 12 November 1964, with 122 mm of rain in 24 hours.
What was the windiest day in Cô Tô?
The windiest day measured in Cô Tô between 1940 and 2025 was 22 August 2000, with winds reaching 35.1 km/h.
What is the warmest month in Cô Tô?
The warmest month in Cô Tô is April (28.9 °C on average); the coldest is January (25.9 °C).
How much does it rain in Cô Tô?
Cô Tô receives on average 1,844 mm of precipitation per year, spread over about 225 rainy days.
Is it sunny in Cô Tô?
Cô Tô gets on average 9.9 hours of sunshine per day, roughly 3,614 hours per year over 1940-2025.
Are there tropical nights in Cô Tô?
Yes: Cô Tô has on average 359 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Cô Tô?
In Cô Tô, between 1940 and 2025, the highest apparent temperature reached 45.3 °C on 5 May 2016, and the lowest was 13.3 °C on 12 January 1955.
Compare Cô Tô with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Cô Tô