Boyolangu climate — normals and trends
Boyolangu (Indonesia) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 25.0 °C and it receives 1,850 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 November (25.8 °C on average) and the coldest is July (23.8 °C). Rainfall peaks in January.
Boyolangu averages 0 frost days, 161 hot days (≥ 30 °C) and 208 rainy days per year.
Boyolangu has warmed by +1.5 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.
The hottest day of the period reached 36.5 °C (on 19 December 2019) and the coldest 14.9 °C (on 2 September 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
BoyolanguEast Java
- coords
- -8.12°, 111.89°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.0°C
Average daily high
29.8°C
Average daily low
21.6°C
Annual rainfall
1,850mm
Sunshine / day
9.6h
Mean relative humidity
84%
Average peak wind
11.5km/h
Seasonal range
2.0°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
161 d/yr
Rainy days (≥ 1 mm)
208 d/yr
Annual snowfall
0.0 cm
Average feels-like high
34.6 °C
Average feels-like low
25.4 °C
Average peak gust
28.6 km/h
Tropical nights (≥ 20 °C)
314 d/yr
Solar radiation
17.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.69 · 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
36.5 °C
19 December 2019
Coldest day
14.9 °C
2 September 1961
Wettest day
200 mm
15 December 1968
Windiest day
27.2 km/h
14 January 1950
Strongest gust
66.6 km/h
30 January 1993
Hottest feels-like
44.1 °C
19 December 2019
Coldest feels-like
15.5 °C
27 August 1963
Sunniest day
12.5 h
19 December 1940
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 30.2 °C | +0.5 °C | 387 mm | +62 mm |
| Feb | 31.1 °C | +1.4 °C | 241 mm | -78 mm |
| Mar | 30.5 °C | +0.7 °C | 316 mm | +48 mm |
| Apr | 30.1 °C | +0.2 °C | 154 mm | -1 mm |
| May | 30.0 °C | +0.3 °C | 275 mm | +177 mm |
| Jun | 29.5 °C | +0.2 °C | 46 mm | -9 mm |
| Jul | 27.9 °C | -0.9 °C | 39 mm | +9 mm |
| Aug | 29.2 °C | +0.1 °C | 70 mm | +50 mm |
| Sep | 29.8 °C | -0.2 °C | 58 mm | +25 mm |
| Oct | 30.7 °C | +0.1 °C | 191 mm | +104 mm |
| Nov | 29.9 °C | -0.6 °C | 308 mm | +118 mm |
| Dec | 30.8 °C | +0.8 °C | 166 mm | -105 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 Boyolangu?
Boyolangu has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 25.0 °C and it receives 1,850 mm of precipitation per year.
What is the hottest day ever recorded in Boyolangu?
The hottest day measured in Boyolangu between 1940 and 2025 was 19 December 2019, reaching 36.5 °C.
What is the coldest day in Boyolangu?
The coldest day measured in Boyolangu between 1940 and 2025 was 2 September 1961, at 14.9 °C.
Does it snow in Boyolangu?
Almost never: Boyolangu sees virtually no snow, with about 0 frost days per year.
Has the climate of Boyolangu warmed?
Yes: Boyolangu warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Boyolangu?
The wettest day measured in Boyolangu between 1940 and 2025 was 15 December 1968, with 200 mm of rain in 24 hours.
What was the windiest day in Boyolangu?
The windiest day measured in Boyolangu between 1940 and 2025 was 14 January 1950, with winds reaching 27.2 km/h.
What is the warmest month in Boyolangu?
The warmest month in Boyolangu is November (25.8 °C on average); the coldest is July (23.8 °C).
How much does it rain in Boyolangu?
Boyolangu receives on average 1,850 mm of precipitation per year, spread over about 208 rainy days.
Is it sunny in Boyolangu?
Boyolangu gets on average 9.6 hours of sunshine per day, roughly 3,504 hours per year over 1940-2025.
Are there tropical nights in Boyolangu?
Yes: Boyolangu has on average 314 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Boyolangu?
In Boyolangu, between 1940 and 2025, the highest apparent temperature reached 44.1 °C on 19 December 2019, and the lowest was 15.5 °C on 27 August 1963.
Compare Boyolangu with another city
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Nearby cities
The climate around Boyolangu