Lahewa climate — normals and trends
Lahewa (Indonesia) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 26.8 °C and it receives 3,107 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 May (27.5 °C on average) and the coldest is November (26.2 °C). Rainfall peaks in November.
Lahewa averages 0 frost days, 3 hot days (≥ 30 °C) and 291 rainy days per year.
Lahewa has warmed by +1.1 °C between 1940 and 2025, or +0.12 °C per decade. This trend is statistically significant.
The hottest day of the period reached 31.3 °C (on 31 March 1983) and the coldest 23.4 °C (on 16 November 1942).
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
LahewaNorth Sumatra
- coords
- 1.39°, 97.17°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.8°C
Average daily high
27.9°C
Average daily low
25.8°C
Annual rainfall
3,107mm
Sunshine / day
9.5h
Mean relative humidity
82%
Average peak wind
14.2km/h
Seasonal range
1.3°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
3 d/yr
Rainy days (≥ 1 mm)
291 d/yr
Annual snowfall
0.0 cm
Average feels-like high
33.6 °C
Average feels-like low
29.9 °C
Average peak gust
23.2 km/h
Tropical nights (≥ 20 °C)
365 d/yr
Solar radiation
18.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.1 °C
since 1940
+0.1 °C per decade · r² = 0.70 · 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
31.3 °C
31 March 1983
Coldest day
23.4 °C
16 November 1942
Wettest day
245 mm
13 January 2025
Windiest day
47.9 km/h
20 October 2025
Strongest gust
66.2 km/h
19 May 2020
Hottest feels-like
39.9 °C
26 May 2024
Coldest feels-like
24.3 °C
10 November 1964
Sunniest day
12.0 h
2 June 1967
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 | 28.4 °C | +0.6 °C | 549 mm | +330 mm |
| Feb | 28.8 °C | +0.7 °C | 127 mm | -52 mm |
| Mar | 28.6 °C | +0.5 °C | 437 mm | +195 mm |
| Apr | 28.7 °C | +0.5 °C | 262 mm | +6 mm |
| May | 29.1 °C | +0.6 °C | 207 mm | -9 mm |
| Jun | 29.2 °C | +0.8 °C | 117 mm | -50 mm |
| Jul | 28.8 °C | +0.7 °C | 180 mm | -17 mm |
| Aug | 28.5 °C | +0.7 °C | 207 mm | -40 mm |
| Sep | 28.3 °C | +0.7 °C | 248 mm | -40 mm |
| Oct | 28.7 °C | +1.4 °C | 325 mm | -50 mm |
| Nov | 27.6 °C | +0.4 °C | 647 mm | +240 mm |
| Dec | 28.0 °C | +0.6 °C | 293 mm | -22 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 Lahewa?
Lahewa has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 26.8 °C and it receives 3,107 mm of precipitation per year.
What is the hottest day ever recorded in Lahewa?
The hottest day measured in Lahewa between 1940 and 2025 was 31 March 1983, reaching 31.3 °C.
What is the coldest day in Lahewa?
The coldest day measured in Lahewa between 1940 and 2025 was 16 November 1942, at 23.4 °C.
Does it snow in Lahewa?
Almost never: Lahewa sees virtually no snow, with about 0 frost days per year.
Has the climate of Lahewa warmed?
Yes: Lahewa warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Lahewa?
The wettest day measured in Lahewa between 1940 and 2025 was 13 January 2025, with 245 mm of rain in 24 hours.
What was the windiest day in Lahewa?
The windiest day measured in Lahewa between 1940 and 2025 was 20 October 2025, with winds reaching 47.9 km/h.
What is the warmest month in Lahewa?
The warmest month in Lahewa is May (27.5 °C on average); the coldest is November (26.2 °C).
How much does it rain in Lahewa?
Lahewa receives on average 3,107 mm of precipitation per year, spread over about 291 rainy days.
Is it sunny in Lahewa?
Lahewa gets on average 9.5 hours of sunshine per day, roughly 3,468 hours per year over 1940-2025.
Are there tropical nights in Lahewa?
Yes: Lahewa has on average 365 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Lahewa?
In Lahewa, between 1940 and 2025, the highest apparent temperature reached 39.9 °C on 26 May 2024, and the lowest was 24.3 °C on 10 November 1964.
Compare Lahewa with another city
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Nearby cities
The climate around Lahewa