Óc Eo climate — normals and trends
Óc Eo (Vietnam) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 27.1 °C and it receives 1,869 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 (28.8 °C on average) and the coldest is January (25.5 °C). Rainfall peaks in October.
Óc Eo averages 0 frost days, 271 hot days (≥ 30 °C) and 224 rainy days per year.
Óc Eo has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.
The hottest day of the period reached 39.2 °C (on 13 May 2016) and the coldest 14.7 °C (on 19 January 1961).
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
Óc EoAn Giang
- coords
- 10.24°, 105.16°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
27.1°C
Average daily high
31.2°C
Average daily low
24.1°C
Annual rainfall
1,869mm
Sunshine / day
9.9h
Mean relative humidity
80%
Average peak wind
14.5km/h
Seasonal range
3.3°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
271 d/yr
Rainy days (≥ 1 mm)
224 d/yr
Annual snowfall
0.0 cm
Average feels-like high
36.2 °C
Average feels-like low
28.3 °C
Average peak gust
32.8 km/h
Tropical nights (≥ 20 °C)
356 d/yr
Solar radiation
18.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °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
39.2 °C
13 May 2016
Coldest day
14.7 °C
19 January 1961
Wettest day
134 mm
12 November 1964
Windiest day
33.0 km/h
7 September 1982
Strongest gust
69.8 km/h
18 August 1957
Hottest feels-like
45.8 °C
7 April 2013
Coldest feels-like
13.3 °C
12 January 1955
Sunniest day
12.0 h
19 July 1978
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 | 29.6 °C | -0.5 °C | 10 mm | -12 mm |
| Feb | 31.4 °C | -0.2 °C | 31 mm | +16 mm |
| Mar | 33.4 °C | -0.1 °C | 13 mm | -25 mm |
| Apr | 33.2 °C | -0.7 °C | 124 mm | +30 mm |
| May | 32.4 °C | +0.1 °C | 319 mm | +113 mm |
| Jun | 30.9 °C | +0.2 °C | 281 mm | +58 mm |
| Jul | 30.9 °C | +0.6 °C | 139 mm | -96 mm |
| Aug | 31.2 °C | +0.9 °C | 173 mm | -66 mm |
| Sep | 30.9 °C | +0.6 °C | 288 mm | -6 mm |
| Oct | 31.6 °C | +0.9 °C | 345 mm | +49 mm |
| Nov | 30.6 °C | -0.1 °C | 160 mm | +9 mm |
| Dec | 31.2 °C | +1.2 °C | 68 mm | +13 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 Óc Eo?
Óc Eo has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.1 °C and it receives 1,869 mm of precipitation per year.
What is the hottest day ever recorded in Óc Eo?
The hottest day measured in Óc Eo between 1940 and 2025 was 13 May 2016, reaching 39.2 °C.
What is the coldest day in Óc Eo?
The coldest day measured in Óc Eo between 1940 and 2025 was 19 January 1961, at 14.7 °C.
Does it snow in Óc Eo?
Almost never: Óc Eo sees virtually no snow, with about 0 frost days per year.
Has the climate of Óc Eo warmed?
Yes: Óc Eo warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Óc Eo?
The wettest day measured in Óc Eo between 1940 and 2025 was 12 November 1964, with 134 mm of rain in 24 hours.
What was the windiest day in Óc Eo?
The windiest day measured in Óc Eo between 1940 and 2025 was 7 September 1982, with winds reaching 33.0 km/h.
What is the warmest month in Óc Eo?
The warmest month in Óc Eo is April (28.8 °C on average); the coldest is January (25.5 °C).
How much does it rain in Óc Eo?
Óc Eo receives on average 1,869 mm of precipitation per year, spread over about 224 rainy days.
Is it sunny in Óc Eo?
Óc Eo gets on average 9.9 hours of sunshine per day, roughly 3,614 hours per year over 1940-2025.
Are there tropical nights in Óc Eo?
Yes: Óc Eo has on average 356 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Óc Eo?
In Óc Eo, between 1940 and 2025, the highest apparent temperature reached 45.8 °C on 7 April 2013, and the lowest was 13.3 °C on 12 January 1955.
Compare Óc Eo with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Óc Eo