Hawthorn in Summer
In summer (December, January and February), Hawthorn sees average daytime highs around 25°C and overnight lows near 14°C, with 152 mm of rain over about 20 wet days across the season. It is the warmest season of the year and the 2nd-wettest season.
Over the season highs climb from about 23°C in early December to 25°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 Hawthorn's best season of the year to visit on our travel score. For the whole year in context, see Hawthorn's year-round climate.
- Avg daytime high
- 25°C
- warmest season of the year
- Avg overnight low
- 14°C
- Rainfall
- 152 mm
- 20 wet days
- Avg wind
- 13 km/h
- Travel score
- 7.4
- best season of the year
- Months
- Dec · Jan · Feb
Temperature in Hawthorn in Summer
Over the season highs climb from about 23°C in early December to 25°C by late February.
A typical summer day in Hawthorn reaches about 25°C and drops to 14°C overnight. The warmest of the three months is January, the coolest December.
Hawthorn 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° / 14° | 49 | 6 | 14.3 | 7.5 |
| Feb | 25° / 14° | 44 | 5.6 | 13.5 | 7.5 |
| Mar | 23° / 13° | 35 | 5.5 | 12.3 | 7.6 |
| Apr | 20° / 10° | 46 | 7 | 11.1 | 6.6 |
| May | 16° / 9° | 43 | 8.5 | 10 | 5.2 |
| Jun | 14° / 7° | 50 | 10.1 | 9.4 | 3.8 |
| Jul | 13° / 6° | 44 | 11 | 9.6 | 3.5 |
| Aug | 14° / 7° | 51 | 11.2 | 10.5 | 4.0 |
| Sep | 16° / 8° | 61 | 11.7 | 11.7 | 5.0 |
| Oct | 19° / 9° | 61 | 10.4 | 13 | 6.0 |
| Nov | 21° / 11° | 61 | 9.2 | 14 | 6.6 |
| Dec | 24° / 12° | 60 | 7.9 | 14.6 | 7.2 |
Cloud cover in Summer
The sky is clear or mostly clear about 36% of the time across summer.
Chance of precipitation in Summer
Hawthorn gets around 152 mm of rain over 20 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 13 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 6.8 kWh/m².
Hazard calendar for Hawthorn
In summer, Hawthorn overlaps its cyclone season. The full year is below, with each hazard's peak months called out.
Hawthorn sits in the South Indian Ocean cyclone belt; the season peaks January–March.
Is summer a good time to visit Hawthorn?
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 Hawthorn for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Hawthorn in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Hawthorn sees daytime highs around 25°C and nights near 14°C. Pack sun protection. Worth having: light clothes. About 20 days see rain.
Sea temperature near Hawthorn in Summer
The nearest coast averages about 20°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 15 km away) is warmest in February at about 21°C and coldest in August near 11°C.
It's comfortable for a long swim from Jan 15 to Mar 11 — about 1.8 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 20 | 21 | 20 | 18 | 15 | 13 | 12 | 11 | 12 | 14 | 17 | 19 |
| Comfort | Refreshing | Refreshing | Cool | Cool | Cool | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 20 | Refreshing |
| Feb | 21 | Refreshing |
| Mar | 20 | Cool |
| Apr | 18 | Cool |
| May | 15 | Cool |
| Jun | 13 | Bracing |
| Jul | 12 | Bracing |
| Aug | 11 | Bracing |
| Sep | 12 | Bracing |
| Oct | 14 | Bracing |
| Nov | 17 | Cool |
| Dec | 19 | Cool |
UV index in Hawthorn 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 Hawthorn peaks around December 19 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 | 4 | 7 | 10 | 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 | 4 | Moderate |
| Oct | 7 | Very high |
| Nov | 10 | Very high |
| Dec | 12 | Extreme |
Where is Hawthorn?
Hawthorn sits at 37.8°S, 145.0°E, 30 m above sea level, in Australia. The nearest listed city is Hawthorn South, 1.0 km away.
Topography around Hawthorn
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Hawthorn.
Within 3 km, the terrain around Hawthorn has only modest variations in elevation — a maximum elevation change of 90 m around an average of 41 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 176 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,316 m.
The land around Hawthorn is covered by artificial surfaces (55%) and trees (40%) within 3 km, artificial surfaces (51%) and trees (30%) within 16 km, and grassland (35%) and trees (34%) 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 Hawthorn (-37.8199°, 145.0358°, elevation 30 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.