Mendi climate — normals and trends
Mendi (Papua New Guinea) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 15.8 °C and it receives 5,861 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 January (16.1 °C on average) and the coldest is July (15.2 °C). Rainfall peaks in October.
Mendi averages 0 frost days, 0 hot days (≥ 30 °C) and 348 rainy days per year.
Mendi 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 26.2 °C (on 29 November 2024) and the coldest 4.6 °C (on 29 September 1948).
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
MendiSouthern Highlands Province
- coords
- -6.15°, 143.66°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.8°C
Average daily high
20.3°C
Average daily low
12.7°C
Annual rainfall
5,861mm
Sunshine / day
8.1h
Mean relative humidity
91%
Average peak wind
9.3km/h
Seasonal range
0.9°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
348 d/yr
Annual snowfall
0.0 cm
Average feels-like high
22.2 °C
Average feels-like low
12.9 °C
Average peak gust
30.8 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
15.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.82 · 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
26.2 °C
29 November 2024
Coldest day
4.6 °C
29 September 1948
Wettest day
167 mm
22 May 1940
Windiest day
23.6 km/h
24 December 1996
Strongest gust
71.6 km/h
2 January 2019
Hottest feels-like
32.5 °C
29 November 2024
Coldest feels-like
2.0 °C
29 September 1948
Sunniest day
12.3 h
19 January 2021
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 | 23.2 °C | +2.4 °C | 825 mm | +362 mm |
| Feb | 22.3 °C | +1.6 °C | 571 mm | +128 mm |
| Mar | 22.9 °C | +2.2 °C | 890 mm | +394 mm |
| Apr | 22.0 °C | +1.3 °C | 804 mm | +262 mm |
| May | 22.5 °C | +1.9 °C | 597 mm | +65 mm |
| Jun | 21.7 °C | +1.9 °C | 498 mm | +66 mm |
| Jul | 21.4 °C | +2.2 °C | 495 mm | +82 mm |
| Aug | 21.2 °C | +1.8 °C | 621 mm | +148 mm |
| Sep | 21.7 °C | +1.8 °C | 838 mm | +263 mm |
| Oct | 22.2 °C | +1.7 °C | 466 mm | -114 mm |
| Nov | 21.8 °C | +0.9 °C | 490 mm | +25 mm |
| Dec | 22.5 °C | +1.7 °C | 716 mm | +269 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 Mendi?
Mendi has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 15.8 °C and it receives 5,861 mm of precipitation per year.
What is the hottest day ever recorded in Mendi?
The hottest day measured in Mendi between 1940 and 2025 was 29 November 2024, reaching 26.2 °C.
What is the coldest day in Mendi?
The coldest day measured in Mendi between 1940 and 2025 was 29 September 1948, at 4.6 °C.
Does it snow in Mendi?
Almost never: Mendi sees virtually no snow, with about 0 frost days per year.
Has the climate of Mendi warmed?
Yes: Mendi warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Mendi?
The wettest day measured in Mendi between 1940 and 2025 was 22 May 1940, with 167 mm of rain in 24 hours.
What was the windiest day in Mendi?
The windiest day measured in Mendi between 1940 and 2025 was 24 December 1996, with winds reaching 23.6 km/h.
What is the warmest month in Mendi?
The warmest month in Mendi is January (16.1 °C on average); the coldest is July (15.2 °C).
How much does it rain in Mendi?
Mendi receives on average 5,861 mm of precipitation per year, spread over about 348 rainy days.
Is it sunny in Mendi?
Mendi gets on average 8.1 hours of sunshine per day, roughly 2,957 hours per year over 1940-2025.
Are there tropical nights in Mendi?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Mendi.
What was the most extreme apparent temperature in Mendi?
In Mendi, between 1940 and 2025, the highest apparent temperature reached 32.5 °C on 29 November 2024, and the lowest was 2.0 °C on 29 September 1948.
Compare Mendi with another city
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Nearby cities
The climate around Mendi