Cai Lậy climate — normals and trends
Cai Lậy (Vietnam) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 27.1 °C and it receives 1,753 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 (25.7 °C). Rainfall peaks in September.
Cai Lậy averages 0 frost days, 293 hot days (≥ 30 °C) and 216 rainy days per year.
Cai Lậy 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 38.7 °C (on 21 May 1983) and the coldest 15.3 °C (on 16 January 1963).
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
Cai LậyDong Thap
- coords
- 10.40°, 106.12°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
27.1°C
Average daily high
31.5°C
Average daily low
24.1°C
Annual rainfall
1,753mm
Sunshine / day
10.0h
Mean relative humidity
80%
Average peak wind
13.4km/h
Seasonal range
3.2°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
293 d/yr
Rainy days (≥ 1 mm)
216 d/yr
Annual snowfall
0.0 cm
Average feels-like high
36.7 °C
Average feels-like low
28.4 °C
Average peak gust
31.4 km/h
Tropical nights (≥ 20 °C)
357 d/yr
Solar radiation
18.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.74 · 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
38.7 °C
21 May 1983
Coldest day
15.3 °C
16 January 1963
Wettest day
104 mm
29 October 1970
Windiest day
30.6 km/h
18 August 1957
Strongest gust
71.6 km/h
27 June 1992
Hottest feels-like
45.1 °C
7 April 2013
Coldest feels-like
14.2 °C
16 January 1963
Sunniest day
12.1 h
5 June 1940
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 | 30.0 °C | -0.5 °C | 6 mm | -15 mm |
| Feb | 31.6 °C | -0.2 °C | 25 mm | +14 mm |
| Mar | 33.0 °C | -0.3 °C | 15 mm | -14 mm |
| Apr | 33.7 °C | -0.2 °C | 84 mm | +9 mm |
| May | 32.8 °C | 0.0 °C | 272 mm | +98 mm |
| Jun | 31.3 °C | -0.1 °C | 267 mm | +59 mm |
| Jul | 31.5 °C | +0.7 °C | 173 mm | -56 mm |
| Aug | 31.8 °C | +1.0 °C | 227 mm | -14 mm |
| Sep | 31.6 °C | +0.7 °C | 325 mm | +35 mm |
| Oct | 31.9 °C | +1.0 °C | 272 mm | -6 mm |
| Nov | 30.6 °C | 0.0 °C | 168 mm | +27 mm |
| Dec | 30.9 °C | +0.8 °C | 86 mm | +30 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 Cai Lậy?
Cai Lậy has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.1 °C and it receives 1,753 mm of precipitation per year.
What is the hottest day ever recorded in Cai Lậy?
The hottest day measured in Cai Lậy between 1940 and 2025 was 21 May 1983, reaching 38.7 °C.
What is the coldest day in Cai Lậy?
The coldest day measured in Cai Lậy between 1940 and 2025 was 16 January 1963, at 15.3 °C.
Does it snow in Cai Lậy?
Almost never: Cai Lậy sees virtually no snow, with about 0 frost days per year.
Has the climate of Cai Lậy warmed?
Yes: Cai Lậy warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Cai Lậy?
The wettest day measured in Cai Lậy between 1940 and 2025 was 29 October 1970, with 104 mm of rain in 24 hours.
What was the windiest day in Cai Lậy?
The windiest day measured in Cai Lậy between 1940 and 2025 was 18 August 1957, with winds reaching 30.6 km/h.
What is the warmest month in Cai Lậy?
The warmest month in Cai Lậy is April (28.9 °C on average); the coldest is January (25.7 °C).
How much does it rain in Cai Lậy?
Cai Lậy receives on average 1,753 mm of precipitation per year, spread over about 216 rainy days.
Is it sunny in Cai Lậy?
Cai Lậy gets on average 10.0 hours of sunshine per day, roughly 3,650 hours per year over 1940-2025.
Are there tropical nights in Cai Lậy?
Yes: Cai Lậy has on average 357 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Cai Lậy?
In Cai Lậy, between 1940 and 2025, the highest apparent temperature reached 45.1 °C on 7 April 2013, and the lowest was 14.2 °C on 16 January 1963.
Compare Cai Lậy with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Cai Lậy