Sa Dec climate — normals and trends
Sa Dec (Vietnam) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 27.0 °C and it receives 1,768 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 (28.7 °C on average) and the coldest is January (25.4 °C). Rainfall peaks in September.
Sa Dec averages 0 frost days, 270 hot days (≥ 30 °C) and 216 rainy days per year.
Sa Dec 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 38.6 °C (on 18 May 2010) and the coldest 15.4 °C (on 4 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
Sa DecDong Thap
- coords
- 10.29°, 105.76°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
27.0°C
Average daily high
31.1°C
Average daily low
24.2°C
Annual rainfall
1,768mm
Sunshine / day
9.8h
Mean relative humidity
81%
Average peak wind
14.0km/h
Seasonal range
3.3°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
270 d/yr
Rainy days (≥ 1 mm)
216 d/yr
Annual snowfall
0.0 cm
Average feels-like high
36.4 °C
Average feels-like low
28.5 °C
Average peak gust
31.8 km/h
Tropical nights (≥ 20 °C)
359 d/yr
Solar radiation
17.9 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
38.6 °C
18 May 2010
Coldest day
15.4 °C
4 January 1940
Wettest day
112 mm
29 October 1970
Windiest day
33.2 km/h
7 September 1982
Strongest gust
70.6 km/h
2 November 1997
Hottest feels-like
46.0 °C
7 April 2013
Coldest feels-like
14.1 °C
16 January 1963
Sunniest day
12.1 h
1 June 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 | 29.3 °C | -0.5 °C | 9 mm | -13 mm |
| Feb | 31.1 °C | -0.2 °C | 49 mm | +37 mm |
| Mar | 32.4 °C | -0.5 °C | 17 mm | -13 mm |
| Apr | 33.0 °C | -0.6 °C | 115 mm | +35 mm |
| May | 32.5 °C | 0.0 °C | 310 mm | +118 mm |
| Jun | 31.3 °C | +0.1 °C | 264 mm | +42 mm |
| Jul | 31.2 °C | +0.6 °C | 144 mm | -87 mm |
| Aug | 31.5 °C | +1.0 °C | 238 mm | +1 mm |
| Sep | 31.2 °C | +0.5 °C | 335 mm | +58 mm |
| Oct | 31.7 °C | +1.0 °C | 259 mm | -10 mm |
| Nov | 30.4 °C | 0.0 °C | 162 mm | +23 mm |
| Dec | 30.5 °C | +0.9 °C | 105 mm | +47 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 Sa Dec?
Sa Dec has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.0 °C and it receives 1,768 mm of precipitation per year.
What is the hottest day ever recorded in Sa Dec?
The hottest day measured in Sa Dec between 1940 and 2025 was 18 May 2010, reaching 38.6 °C.
What is the coldest day in Sa Dec?
The coldest day measured in Sa Dec between 1940 and 2025 was 4 January 1940, at 15.4 °C.
Does it snow in Sa Dec?
Almost never: Sa Dec sees virtually no snow, with about 0 frost days per year.
Has the climate of Sa Dec warmed?
Yes: Sa Dec warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sa Dec?
The wettest day measured in Sa Dec between 1940 and 2025 was 29 October 1970, with 112 mm of rain in 24 hours.
What was the windiest day in Sa Dec?
The windiest day measured in Sa Dec between 1940 and 2025 was 7 September 1982, with winds reaching 33.2 km/h.
What is the warmest month in Sa Dec?
The warmest month in Sa Dec is April (28.7 °C on average); the coldest is January (25.4 °C).
How much does it rain in Sa Dec?
Sa Dec receives on average 1,768 mm of precipitation per year, spread over about 216 rainy days.
Is it sunny in Sa Dec?
Sa Dec gets on average 9.8 hours of sunshine per day, roughly 3,577 hours per year over 1940-2025.
Are there tropical nights in Sa Dec?
Yes: Sa Dec has on average 359 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Sa Dec?
In Sa Dec, between 1940 and 2025, the highest apparent temperature reached 46.0 °C on 7 April 2013, and the lowest was 14.1 °C on 16 January 1963.
Compare Sa Dec with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Sa Dec