Tomohon in Summer
In summer (June, July and August), Tomohon sees average daytime highs around 28°C and overnight lows near 22°C, with 758 mm of rain over about 68 wet days across the season. It is the 3rd-warmest season and the driest season of the year.
Across summer, daytime highs hold fairly steady around 28°C. The sky is clear or mostly clear about 11% of the time across summer, and the air most often feels oppressive.
Summer is Tomohon's best season of the year to visit on our travel score. Tomohon 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 Tomohon's year-round climate.
- Avg daytime high
- 28°C
- 3rd-warmest season
- Avg overnight low
- 22°C
- Rainfall
- 758 mm
- 68 wet days
- Avg wind
- 5 km/h
- Travel score
- 4.2
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Tomohon in Summer
Across summer, daytime highs hold fairly steady around 28°C.
A typical summer day in Tomohon reaches about 28°C and drops to 22°C overnight. The warmest of the three months is August, the coolest August.
How summer really feels in Tomohon
Once humidity and wind are folded in, summer brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Tomohon weather by month
How the three summer months (June, July and August) 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 | 28° / 22° | 304 | 28.9 | 11.9 | 3.5 |
| Feb | 28° / 22° | 282 | 25.3 | 12 | 3.6 |
| Mar | 28° / 22° | 295 | 28.4 | 12 | 3.3 |
| Apr | 29° / 22° | 332 | 27.4 | 12 | 3.2 |
| May | 29° / 23° | 354 | 29 | 12.1 | 3.1 |
| Jun | 28° / 22° | 339 | 26.3 | 12.1 | 3.6 |
| Jul | 28° / 22° | 253 | 23.3 | 12.1 | 4.3 |
| Aug | 28° / 22° | 166 | 18.4 | 12 | 4.6 |
| Sep | 29° / 21° | 189 | 19.5 | 12 | 4.1 |
| Oct | 29° / 22° | 276 | 24.7 | 12 | 3.5 |
| Nov | 29° / 22° | 319 | 28.7 | 11.9 | 3.0 |
| Dec | 28° / 22° | 323 | 30 | 11.9 | 3.1 |
Cloud cover in Summer
The sky is clear or mostly clear about 11% of the time across summer.
Chance of precipitation in Summer
Tomohon gets around 758 mm of rain over 68 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 5 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 06 min in early June to 12 hours by late August. 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 5.3 kWh/m².
Is summer a good time to visit Tomohon?
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 reasonable time to visit Tomohon for sightseeing.
What to pack for Tomohon in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Tomohon sees daytime highs around 28°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 68 days see rain.
Sea temperature near Tomohon 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 at the nearest coast (about 21 km away) is warmest in June 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 | 29 | 30 | 30 | 29 | 29 | 29 | 30 | 29 | 29 |
| 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 | 29 | Tropical |
| May | 30 | Tropical |
| Jun | 30 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 30 | Tropical |
| Nov | 29 | Tropical |
| Dec | 29 | Tropical |
UV index in Tomohon 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 Tomohon peaks around March 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 19 at about 11 (extreme).
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) | 14 | 15 | 15 | 14 | 12 | 12 | 12 | 13 | 14 | 14 | 11 | 12 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 15 | Extreme |
| Mar | 15 | Extreme |
| Apr | 14 | Extreme |
| May | 12 | Extreme |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 13 | Extreme |
| Sep | 14 | Extreme |
| Oct | 14 | Extreme |
| Nov | 11 | Extreme |
| Dec | 12 | Extreme |
Where is Tomohon?
Tomohon sits at 1.3°N, 124.8°E, 734 m above sea level, in Indonesia. The nearest listed city is Tondano, 12 km away.
Topography around Tomohon
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Tomohon.
Within 3 km, the terrain around Tomohon has significant variations in elevation — a maximum elevation change of 490 m around an average of 719 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,565 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,962 m.
The land around Tomohon is covered by trees (80%) within 3 km, trees (79%) within 16 km, and water (65%) and trees (32%) 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 Tomohon (1.3168°, 124.8038°, elevation 734 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.