Pekalongan climate — normals and trends
Pekalongan (Indonesia) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 24.5 °C and it receives 3,302 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 (25.0 °C on average) and the coldest is January (24.0 °C). Rainfall peaks in December.
Pekalongan averages 0 frost days, 3 hot days (≥ 30 °C) and 286 rainy days per year.
Pekalongan has warmed by +1.6 °C between 1940 and 2025, or +0.19 °C per decade. This trend is statistically significant.
The hottest day of the period reached 32.2 °C (on 13 October 1972) and the coldest 16.9 °C (on 19 June 1941).
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
PekalonganCentral Java
- coords
- -6.89°, 109.68°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
24.5°C
Average daily high
27.5°C
Average daily low
22.2°C
Annual rainfall
3,302mm
Sunshine / day
10.1h
Mean relative humidity
84%
Average peak wind
8.9km/h
Seasonal range
1.0°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
3 d/yr
Rainy days (≥ 1 mm)
286 d/yr
Annual snowfall
0.0 cm
Average feels-like high
32.7 °C
Average feels-like low
25.8 °C
Average peak gust
26.0 km/h
Tropical nights (≥ 20 °C)
355 d/yr
Solar radiation
18.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.6 °C
since 1940
+0.2 °C per decade · r² = 0.80 · 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
32.2 °C
13 October 1972
Coldest day
16.9 °C
19 June 1941
Wettest day
247 mm
7 December 1991
Windiest day
27.4 km/h
25 January 2012
Strongest gust
68.4 km/h
11 February 2001
Hottest feels-like
38.1 °C
15 November 2018
Coldest feels-like
17.1 °C
19 June 1941
Sunniest day
12.4 h
16 December 1975
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 | 27.7 °C | +0.9 °C | 503 mm | +104 mm |
| Feb | 28.0 °C | +1.1 °C | 279 mm | -79 mm |
| Mar | 28.1 °C | +0.7 °C | 411 mm | +24 mm |
| Apr | 28.0 °C | +0.2 °C | 317 mm | -12 mm |
| May | 28.4 °C | +0.5 °C | 390 mm | +177 mm |
| Jun | 28.0 °C | +0.4 °C | 258 mm | +117 mm |
| Jul | 27.5 °C | +0.3 °C | 102 mm | -7 mm |
| Aug | 27.4 °C | 0.0 °C | 373 mm | +275 mm |
| Sep | 27.9 °C | 0.0 °C | 322 mm | +188 mm |
| Oct | 28.2 °C | +0.1 °C | 537 mm | +277 mm |
| Nov | 28.1 °C | +0.4 °C | 399 mm | -7 mm |
| Dec | 28.3 °C | +1.0 °C | 456 mm | -12 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 Pekalongan?
Pekalongan has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 24.5 °C and it receives 3,302 mm of precipitation per year.
What is the hottest day ever recorded in Pekalongan?
The hottest day measured in Pekalongan between 1940 and 2025 was 13 October 1972, reaching 32.2 °C.
What is the coldest day in Pekalongan?
The coldest day measured in Pekalongan between 1940 and 2025 was 19 June 1941, at 16.9 °C.
Does it snow in Pekalongan?
Almost never: Pekalongan sees virtually no snow, with about 0 frost days per year.
Has the climate of Pekalongan warmed?
Yes: Pekalongan warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Pekalongan?
The wettest day measured in Pekalongan between 1940 and 2025 was 7 December 1991, with 247 mm of rain in 24 hours.
What was the windiest day in Pekalongan?
The windiest day measured in Pekalongan between 1940 and 2025 was 25 January 2012, with winds reaching 27.4 km/h.
What is the warmest month in Pekalongan?
The warmest month in Pekalongan is May (25.0 °C on average); the coldest is January (24.0 °C).
How much does it rain in Pekalongan?
Pekalongan receives on average 3,302 mm of precipitation per year, spread over about 286 rainy days.
Is it sunny in Pekalongan?
Pekalongan gets on average 10.1 hours of sunshine per day, roughly 3,687 hours per year over 1940-2025.
Are there tropical nights in Pekalongan?
Yes: Pekalongan has on average 355 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Pekalongan?
In Pekalongan, between 1940 and 2025, the highest apparent temperature reached 38.1 °C on 15 November 2018, and the lowest was 17.1 °C on 19 June 1941.
Compare Pekalongan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Pekalongan