Loa Janan climate — normals and trends
Loa Janan (Indonesia) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 25.9 °C and it receives 2,767 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 (26.1 °C on average) and the coldest is January (25.6 °C). Rainfall peaks in April.
Loa Janan averages 0 frost days, 225 hot days (≥ 30 °C) and 315 rainy days per year.
Loa Janan has warmed by +2.2 °C between 1940 and 2025, or +0.26 °C per decade. This trend is statistically significant.
The hottest day of the period reached 37.5 °C (on 16 March 1998) and the coldest 19.1 °C (on 12 July 1946).
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
Loa JananEast Kalimantan
- coords
- -0.58°, 117.10°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.9°C
Average daily high
30.4°C
Average daily low
23.0°C
Annual rainfall
2,767mm
Sunshine / day
9.7h
Mean relative humidity
89%
Average peak wind
8.0km/h
Seasonal range
0.5°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
225 d/yr
Rainy days (≥ 1 mm)
315 d/yr
Annual snowfall
0.0 cm
Average feels-like high
36.8 °C
Average feels-like low
27.6 °C
Average peak gust
23.9 km/h
Tropical nights (≥ 20 °C)
365 d/yr
Solar radiation
17.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.2 °C
since 1940
+0.3 °C per decade · r² = 0.83 · 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
37.5 °C
16 March 1998
Coldest day
19.1 °C
12 July 1946
Wettest day
132 mm
22 May 2020
Windiest day
19.0 km/h
15 August 1986
Strongest gust
59.0 km/h
22 November 2007
Hottest feels-like
44.0 °C
23 March 2020
Coldest feels-like
21.6 °C
12 July 1946
Sunniest day
12.0 h
28 September 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 | 31.0 °C | +0.9 °C | 430 mm | +178 mm |
| Feb | 31.4 °C | +1.2 °C | 300 mm | +65 mm |
| Mar | 31.3 °C | +0.8 °C | 339 mm | +63 mm |
| Apr | 30.8 °C | +0.2 °C | 413 mm | +134 mm |
| May | 32.1 °C | +1.6 °C | 388 mm | +143 mm |
| Jun | 31.1 °C | +1.0 °C | 237 mm | +37 mm |
| Jul | 31.7 °C | +1.7 °C | 121 mm | -51 mm |
| Aug | 30.9 °C | +0.6 °C | 264 mm | +91 mm |
| Sep | 31.8 °C | +1.0 °C | 252 mm | +71 mm |
| Oct | 32.3 °C | +1.3 °C | 213 mm | +1 mm |
| Nov | 31.8 °C | +1.2 °C | 237 mm | -27 mm |
| Dec | 31.8 °C | +1.6 °C | 328 mm | +49 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 Loa Janan?
Loa Janan has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 25.9 °C and it receives 2,767 mm of precipitation per year.
What is the hottest day ever recorded in Loa Janan?
The hottest day measured in Loa Janan between 1940 and 2025 was 16 March 1998, reaching 37.5 °C.
What is the coldest day in Loa Janan?
The coldest day measured in Loa Janan between 1940 and 2025 was 12 July 1946, at 19.1 °C.
Does it snow in Loa Janan?
Almost never: Loa Janan sees virtually no snow, with about 0 frost days per year.
Has the climate of Loa Janan warmed?
Yes: Loa Janan warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Loa Janan?
The wettest day measured in Loa Janan between 1940 and 2025 was 22 May 2020, with 132 mm of rain in 24 hours.
What was the windiest day in Loa Janan?
The windiest day measured in Loa Janan between 1940 and 2025 was 15 August 1986, with winds reaching 19.0 km/h.
What is the warmest month in Loa Janan?
The warmest month in Loa Janan is April (26.1 °C on average); the coldest is January (25.6 °C).
How much does it rain in Loa Janan?
Loa Janan receives on average 2,767 mm of precipitation per year, spread over about 315 rainy days.
Is it sunny in Loa Janan?
Loa Janan gets on average 9.7 hours of sunshine per day, roughly 3,540 hours per year over 1940-2025.
Are there tropical nights in Loa Janan?
Yes: Loa Janan has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Loa Janan?
In Loa Janan, between 1940 and 2025, the highest apparent temperature reached 44.0 °C on 23 March 2020, and the lowest was 21.6 °C on 12 July 1946.
Compare Loa Janan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Loa Janan