Mount Gambier in Summer
In summer (December, January and February), Mount Gambier sees average daytime highs around 23°C and overnight lows near 12°C, with 106 mm of rain over about 16 wet days across the season. It is the warmest season of the year and the driest season of the year.
Over the season highs climb from about 21°C in early December to 24°C by late February. The sky is clear or mostly clear about 36% of the time across summer, and the air most often feels dry.
Summer is Mount Gambier's best season of the year to visit on our travel score. For the whole year in context, see Mount Gambier's year-round climate.
- Avg daytime high
- 23°C
- warmest season of the year
- Avg overnight low
- 12°C
- Rainfall
- 106 mm
- 16 wet days
- Avg wind
- 15 km/h
- Travel score
- 7.7
- best season of the year
- Months
- Dec · Jan · Feb
Temperature in Mount Gambier in Summer
Over the season highs climb from about 21°C in early December to 24°C by late February.
A typical summer day in Mount Gambier reaches about 23°C and drops to 12°C overnight. The warmest of the three months is February, the coolest December.
Mount Gambier 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 | 24° / 12° | 38 | 5 | 14.3 | 7.9 |
| Feb | 24° / 13° | 24 | 3.8 | 13.5 | 8.0 |
| Mar | 22° / 11° | 28 | 5.5 | 12.3 | 7.4 |
| Apr | 19° / 10° | 38 | 6.8 | 11.1 | 6.4 |
| May | 16° / 9° | 51 | 9.2 | 10 | 4.9 |
| Jun | 14° / 7° | 66 | 11.6 | 9.4 | 3.7 |
| Jul | 13° / 7° | 74 | 12.9 | 9.6 | 3.3 |
| Aug | 14° / 7° | 81 | 13.9 | 10.5 | 3.6 |
| Sep | 16° / 7° | 73 | 12.4 | 11.7 | 4.4 |
| Oct | 18° / 8° | 51 | 9.7 | 13 | 5.7 |
| Nov | 20° / 9° | 46 | 7.4 | 14 | 6.5 |
| Dec | 22° / 11° | 44 | 6.9 | 14.6 | 7.1 |
Cloud cover in Summer
The sky is clear or mostly clear about 36% of the time across summer.
Chance of precipitation in Summer
Mount Gambier gets around 106 mm of rain over 16 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 15 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 24 min in early December to 13 hours 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 7.0 kWh/m².
Hazard calendar for Mount Gambier
In summer, Mount Gambier overlaps its cyclone season. The full year is below, with each hazard's peak months called out.
Mount Gambier sits in the South Indian Ocean cyclone belt; the season peaks January–March.
Is summer a good time to visit Mount Gambier?
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 one of the better times to visit Mount Gambier for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Mount Gambier in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Mount Gambier sees daytime highs around 23°C and nights near 12°C. Pack sun protection. Worth having: light clothes. About 16 days see rain.
Sea temperature near Mount Gambier in Summer
The nearest coast averages about 17°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 34 km away) is warmest in February at about 18°C and coldest in September near 14°C.
The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 17 | 18 | 17 | 16 | 16 | 16 | 15 | 14 | 14 | 14 | 15 | 16 |
| Comfort | Cool | Cool | Cool | Cool | Cool | Cool | Cool | Bracing | Bracing | Bracing | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 17 | Cool |
| Feb | 18 | Cool |
| Mar | 17 | Cool |
| Apr | 16 | Cool |
| May | 16 | Cool |
| Jun | 16 | Cool |
| Jul | 15 | Cool |
| Aug | 14 | Bracing |
| Sep | 14 | Bracing |
| Oct | 14 | Bracing |
| Nov | 15 | Cool |
| Dec | 16 | Cool |
UV index in Mount Gambier in Summer
Clear-sky midday UV across summer averages around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Mount Gambier peaks around December 20 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 2 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 11 | 10 | 8 | 5 | 3 | 2 | 2 | 3 | 5 | 7 | 9 | 12 |
| Level | Extreme | Extreme | Very high | Moderate | Moderate | Low | Moderate | Moderate | Moderate | Very high | Very high | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 11 | Extreme |
| Feb | 10 | Extreme |
| Mar | 8 | Very high |
| Apr | 5 | Moderate |
| May | 3 | Moderate |
| Jun | 2 | Low |
| Jul | 2 | Moderate |
| Aug | 3 | Moderate |
| Sep | 5 | Moderate |
| Oct | 7 | Very high |
| Nov | 9 | Very high |
| Dec | 12 | Extreme |
Where is Mount Gambier?
Mount Gambier sits at 37.8°S, 140.8°E, 41 m above sea level, in Australia. The nearest listed city is Warrnambool, 162 km away.
Topography around Mount Gambier
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Mount Gambier.
Within 3 km, the terrain around Mount Gambier has only modest variations in elevation — a maximum elevation change of 162 m around an average of 49 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 166 m; within 80 km, significant variations in elevation — a maximum elevation change of 325 m.
The land around Mount Gambier is covered by artificial surfaces (39%), grassland (33%) and trees (22%) within 3 km, grassland (62%) and trees (31%) within 16 km, and grassland (39%), water (29%) and trees (28%) within 80 km.
Australia travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type I
- 230 V · 50 Hz
- Prices
- ≈ 90% of US
- price level, 2025
- GDP per capita
- $65,130
- 2025
- Happiness
- 6.9 / 10
- World Happiness, 2025
- Homicide rate
- 0.9
- per 100k, 2023
- Road deaths
- 4.9
- per 100k/yr, 2019
- Income group
- High
- World Bank
- 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 Mount Gambier (-37.8318°, 140.7792°, elevation 41 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.