Weleri in Summer
In summer (December, January and February), Weleri sees average daytime highs around 26°C and overnight lows near 23°C, with 1517 mm of rain over about 88 wet days across the season. It is the coldest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 26°C. The sky is clear or mostly clear about 1% of the time across summer, and the air most often feels oppressive.
Summer is Weleri's weakest season of the year to visit on our travel score. Weleri has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see Weleri's year-round climate.
- Avg daytime high
- 26°C
- coldest season of the year
- Avg overnight low
- 23°C
- Rainfall
- 1517 mm
- 88 wet days
- Avg wind
- 10 km/h
- Travel score
- 3.4
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in Weleri in Summer
Across summer, daytime highs hold fairly steady around 26°C.
A typical summer day in Weleri reaches about 26°C and drops to 23°C overnight. The warmest of the three months is December, the coolest February.
Weleri weather by month
How the three summer months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 26° / 23° | 490 | 30.4 | 12.4 | 3.4 |
| Feb | 26° / 23° | 457 | 27.6 | 12.2 | 3.4 |
| Mar | 26° / 23° | 438 | 30.3 | 12 | 3.4 |
| Apr | 27° / 23° | 316 | 27.1 | 11.9 | 3.8 |
| May | 27° / 24° | 139 | 20.4 | 11.7 | 5.0 |
| Jun | 26° / 23° | 94 | 14.3 | 11.6 | 5.9 |
| Jul | 26° / 23° | 60 | 11.9 | 11.6 | 6.5 |
| Aug | 26° / 23° | 49 | 11.7 | 11.8 | 6.5 |
| Sep | 26° / 23° | 73 | 12.7 | 12 | 6.2 |
| Oct | 27° / 23° | 188 | 19.5 | 12.2 | 5.0 |
| Nov | 27° / 23° | 398 | 27.3 | 12.3 | 3.8 |
| Dec | 26° / 23° | 570 | 29.8 | 12.4 | 3.4 |
Cloud cover in Summer
The sky is clear or mostly clear about 1% of the time across summer.
Chance of precipitation in Summer
Weleri gets around 1517 mm of rain over 88 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 10 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 24 min in early December to 12 h 12 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 4.6 kWh/m².
Hazard calendar for Weleri
In summer, Weleri overlaps its cyclone and rainy season season. The full year is below, with each hazard's peak months called out.
Weleri sits in the South Indian Ocean cyclone belt; the season peaks January–March.
Weleri's rainy season runs November–April, when most of the year's rain falls.
Is summer a good time to visit Weleri?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a weaker month for outdoor sightseeing in Weleri.
What to pack for Weleri in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Weleri sees daytime highs around 26°C and nights near 23°C. Pack rain gear. Worth having: light clothes and sun protection. About 88 days see rain.
Sea temperature near Weleri in Summer
The nearest coast averages about 29°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in May at about 30°C and coldest in February near 29°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 29 | 29 | 29 | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 30 | 30 |
| Comfort | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 29 | Tropical |
| Feb | 29 | Tropical |
| Mar | 29 | Tropical |
| Apr | 30 | Tropical |
| May | 30 | Tropical |
| Jun | 29 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 30 | Tropical |
| Dec | 30 | Tropical |
UV index in Weleri in Summer
Clear-sky midday UV across summer averages around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Weleri peaks around March 14 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 15 at about 7 (high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 11 | 13 | 14 | 11 | 8 | 7 | 9 | 11 | 12 | 10 | 6 | 12 |
| Level | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high | Extreme | Extreme | Extreme | High | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 11 | Extreme |
| Feb | 13 | Extreme |
| Mar | 14 | Extreme |
| Apr | 11 | Extreme |
| May | 8 | Very high |
| Jun | 7 | Very high |
| Jul | 9 | Very high |
| Aug | 11 | Extreme |
| Sep | 12 | Extreme |
| Oct | 10 | Extreme |
| Nov | 6 | High |
| Dec | 12 | Extreme |
Air quality in Weleri in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Weleri is worst in May — around 45 µg/m³ PM2.5 (poor), and holds fairly steady the rest of the year.
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 33 | 30 | 38 | 43 | 45 | 41 | 36 | 36 | 38 | 39 | 38 | 34 |
| Level | Moderate | Moderate | Poor | Poor | Poor | Poor | Poor | Poor | Poor | Poor | Poor | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 33 | Moderate |
| Feb | 30 | Moderate |
| Mar | 38 | Poor |
| Apr | 43 | Poor |
| May | 45 | Poor |
| Jun | 41 | Poor |
| Jul | 36 | Poor |
| Aug | 36 | Poor |
| Sep | 38 | Poor |
| Oct | 39 | Poor |
| Nov | 38 | Poor |
| Dec | 34 | Moderate |
Where is Weleri?
Weleri sits at 7.0°S, 110.1°E, 17 m above sea level, in Indonesia. The nearest listed city is Semarang, 39 km away.
Topography around Weleri
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Weleri.
Within 3 km, the terrain around Weleri has only modest variations in elevation — a maximum elevation change of 220 m around an average of 30 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 757 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,293 m.
The land around Weleri is covered by cropland (40%), trees (37%) and artificial surfaces (21%) within 3 km, trees (46%), cropland (23%) and water (21%) within 16 km, and trees (49%) and water (31%) within 80 km.
Indonesia travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 29% of US
- price level, 2025
- GDP per capita
- $5,060
- 2025
- Happiness
- 5.6 / 10
- World Happiness, 2025
- Safe drinking water
- 30%
- of population, 2024
- Homicide rate
- 0.3
- per 100k, 2022
- Road deaths
- 11.3
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 471
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Weleri (-6.9713°, 110.0666°, elevation 17 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.