Bien Hoa climate — normals and trends
Bien Hoa (Vietnam) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 27.1 °C and it receives 1,840 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 (29.0 °C on average) and the coldest is December (25.9 °C). Rainfall peaks in September.
Bien Hoa averages 0 frost days, 291 hot days (≥ 30 °C) and 214 rainy days per year.
Bien Hoa has warmed by +1.9 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.
The hottest day of the period reached 39.7 °C (on 28 April 1975) and the coldest 15.6 °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
Bien HoaDong Nai
- coords
- 10.94°, 106.82°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
27.1°C
Average daily high
31.6°C
Average daily low
24.0°C
Annual rainfall
1,840mm
Sunshine / day
9.9h
Mean relative humidity
80%
Average peak wind
11.9km/h
Seasonal range
3.1°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
291 d/yr
Rainy days (≥ 1 mm)
214 d/yr
Annual snowfall
0.0 cm
Average feels-like high
37.1 °C
Average feels-like low
28.4 °C
Average peak gust
28.3 km/h
Tropical nights (≥ 20 °C)
357 d/yr
Solar radiation
18.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.78 · 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
39.7 °C
28 April 1975
Coldest day
15.6 °C
16 January 1963
Wettest day
122 mm
4 October 1985
Windiest day
30.6 km/h
7 November 1988
Strongest gust
73.1 km/h
18 August 1957
Hottest feels-like
45.9 °C
18 May 2010
Coldest feels-like
14.6 °C
30 December 1975
Sunniest day
12.2 h
12 June 1946
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 | 31.1 °C | -0.1 °C | 7 mm | -10 mm |
| Feb | 32.1 °C | -0.5 °C | 21 mm | +11 mm |
| Mar | 33.3 °C | -0.3 °C | 19 mm | -6 mm |
| Apr | 34.3 °C | +0.3 °C | 51 mm | -21 mm |
| May | 33.7 °C | +0.9 °C | 282 mm | +89 mm |
| Jun | 31.6 °C | +0.2 °C | 290 mm | +38 mm |
| Jul | 31.5 °C | +0.7 °C | 242 mm | -31 mm |
| Aug | 31.7 °C | +1.0 °C | 309 mm | +31 mm |
| Sep | 31.2 °C | +0.6 °C | 348 mm | +41 mm |
| Oct | 31.3 °C | +0.9 °C | 244 mm | -2 mm |
| Nov | 30.4 °C | +0.1 °C | 170 mm | +49 mm |
| Dec | 31.0 °C | +0.8 °C | 44 mm | -3 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 Bien Hoa?
Bien Hoa has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.1 °C and it receives 1,840 mm of precipitation per year.
What is the hottest day ever recorded in Bien Hoa?
The hottest day measured in Bien Hoa between 1940 and 2025 was 28 April 1975, reaching 39.7 °C.
What is the coldest day in Bien Hoa?
The coldest day measured in Bien Hoa between 1940 and 2025 was 16 January 1963, at 15.6 °C.
Does it snow in Bien Hoa?
Almost never: Bien Hoa sees virtually no snow, with about 0 frost days per year.
Has the climate of Bien Hoa warmed?
Yes: Bien Hoa warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Bien Hoa?
The wettest day measured in Bien Hoa between 1940 and 2025 was 4 October 1985, with 122 mm of rain in 24 hours.
What was the windiest day in Bien Hoa?
The windiest day measured in Bien Hoa between 1940 and 2025 was 7 November 1988, with winds reaching 30.6 km/h.
What is the warmest month in Bien Hoa?
The warmest month in Bien Hoa is April (29.0 °C on average); the coldest is December (25.9 °C).
How much does it rain in Bien Hoa?
Bien Hoa receives on average 1,840 mm of precipitation per year, spread over about 214 rainy days.
Is it sunny in Bien Hoa?
Bien Hoa gets on average 9.9 hours of sunshine per day, roughly 3,614 hours per year over 1940-2025.
Are there tropical nights in Bien Hoa?
Yes: Bien Hoa has on average 357 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Bien Hoa?
In Bien Hoa, between 1940 and 2025, the highest apparent temperature reached 45.9 °C on 18 May 2010, and the lowest was 14.6 °C on 30 December 1975.
Compare Bien Hoa with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Bien Hoa