Bulolo climate — normals and trends
Bulolo (Papua New Guinea) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 17.9 °C and it receives 3,131 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 (18.6 °C on average) and the coldest is July (16.9 °C). Rainfall peaks in March.
Bulolo averages 0 frost days, 0 hot days (≥ 30 °C) and 309 rainy days per year.
Bulolo has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.
The hottest day of the period reached 28.3 °C (on 25 January 2024) and the coldest 8.3 °C (on 24 August 1990).
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
BuloloMorobe Province
- coords
- -7.20°, 146.64°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.9°C
Average daily high
22.1°C
Average daily low
14.9°C
Annual rainfall
3,131mm
Sunshine / day
8.8h
Mean relative humidity
89%
Average peak wind
5.5km/h
Seasonal range
1.7°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
309 d/yr
Annual snowfall
0.0 cm
Average feels-like high
24.9 °C
Average feels-like low
16.0 °C
Average peak gust
30.2 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
16.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °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
28.3 °C
25 January 2024
Coldest day
8.3 °C
24 August 1990
Wettest day
140 mm
11 October 2013
Windiest day
19.0 km/h
12 March 1997
Strongest gust
86.0 km/h
9 March 1977
Hottest feels-like
34.7 °C
26 March 2025
Coldest feels-like
7.3 °C
24 August 1990
Sunniest day
12.3 h
28 January 2025
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 | 25.1 °C | +2.0 °C | 514 mm | +185 mm |
| Feb | 24.5 °C | +1.4 °C | 424 mm | +92 mm |
| Mar | 24.4 °C | +1.5 °C | 416 mm | +47 mm |
| Apr | 23.6 °C | +1.2 °C | 445 mm | +148 mm |
| May | 23.5 °C | +1.5 °C | 157 mm | -57 mm |
| Jun | 22.6 °C | +1.4 °C | 212 mm | +31 mm |
| Jul | 22.4 °C | +1.7 °C | 271 mm | +88 mm |
| Aug | 22.2 °C | +1.4 °C | 207 mm | +22 mm |
| Sep | 22.3 °C | +1.0 °C | 354 mm | +144 mm |
| Oct | 23.3 °C | +1.3 °C | 261 mm | +17 mm |
| Nov | 23.6 °C | +1.0 °C | 303 mm | +47 mm |
| Dec | 24.0 °C | +1.1 °C | 419 mm | +88 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 Bulolo?
Bulolo has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 17.9 °C and it receives 3,131 mm of precipitation per year.
What is the hottest day ever recorded in Bulolo?
The hottest day measured in Bulolo between 1940 and 2025 was 25 January 2024, reaching 28.3 °C.
What is the coldest day in Bulolo?
The coldest day measured in Bulolo between 1940 and 2025 was 24 August 1990, at 8.3 °C.
Does it snow in Bulolo?
Almost never: Bulolo sees virtually no snow, with about 0 frost days per year.
Has the climate of Bulolo warmed?
Yes: Bulolo warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Bulolo?
The wettest day measured in Bulolo between 1940 and 2025 was 11 October 2013, with 140 mm of rain in 24 hours.
What was the windiest day in Bulolo?
The windiest day measured in Bulolo between 1940 and 2025 was 12 March 1997, with winds reaching 19.0 km/h.
What is the warmest month in Bulolo?
The warmest month in Bulolo is January (18.6 °C on average); the coldest is July (16.9 °C).
How much does it rain in Bulolo?
Bulolo receives on average 3,131 mm of precipitation per year, spread over about 309 rainy days.
Is it sunny in Bulolo?
Bulolo gets on average 8.8 hours of sunshine per day, roughly 3,212 hours per year over 1940-2025.
Are there tropical nights in Bulolo?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Bulolo.
What was the most extreme apparent temperature in Bulolo?
In Bulolo, between 1940 and 2025, the highest apparent temperature reached 34.7 °C on 26 March 2025, and the lowest was 7.3 °C on 24 August 1990.
Compare Bulolo with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Bulolo