Hornsby in Fall
In fall (March, April and May), Hornsby sees average daytime highs around 23°C and overnight lows near 13°C, with 162 mm of rain over about 25 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.
Over the season highs ease from about 26°C in early March to 19°C by late May. The sky is clear or mostly clear about 42% of the time across fall, and the air most often feels dry.
Fall is Hornsby's 2nd-best season to visit on our travel score. For the whole year in context, see Hornsby's year-round climate.
- Avg daytime high
- 23°C
- 3rd-warmest season
- Avg overnight low
- 13°C
- Rainfall
- 162 mm
- 25 wet days
- Avg wind
- 9 km/h
- Travel score
- 7.1
- 2nd-best season
- Months
- Mar · Apr · May
Temperature in Hornsby in Fall
Over the season highs ease from about 26°C in early March to 19°C by late May.
A typical fall day in Hornsby reaches about 23°C and drops to 13°C overnight. The warmest of the three months is March, the coolest May.
Hornsby weather by month
How the three fall months (March, April and May) 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° / 19° | 66 | 9.1 | 14 | 6.2 |
| Feb | 27° / 19° | 84 | 10 | 13.3 | 6.3 |
| Mar | 26° / 17° | 66 | 10.6 | 12.3 | 6.8 |
| Apr | 23° / 13° | 51 | 7.8 | 11.2 | 7.4 |
| May | 20° / 10° | 45 | 6.3 | 10.3 | 7.1 |
| Jun | 18° / 8° | 61 | 7.4 | 9.8 | 6.3 |
| Jul | 17° / 7° | 35 | 5.7 | 10 | 6.5 |
| Aug | 19° / 7° | 35 | 5.2 | 10.7 | 7.2 |
| Sep | 22° / 10° | 39 | 6.1 | 11.8 | 7.5 |
| Oct | 24° / 13° | 49 | 7.3 | 12.8 | 7.5 |
| Nov | 25° / 15° | 66 | 8.6 | 13.7 | 7.0 |
| Dec | 27° / 17° | 58 | 8.7 | 14.2 | 6.7 |
Cloud cover in Fall
The sky is clear or mostly clear about 42% of the time across fall.
Chance of precipitation in Fall
Hornsby gets around 162 mm of rain over 25 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 9 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 48 min in early March to 9 h 54 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 3.8 kWh/m².
Hazard calendar for Hornsby
In fall, Hornsby overlaps its cyclone season. The full year is below, with each hazard's peak months called out.
Hornsby sits in the South Indian Ocean cyclone belt; the season peaks January–March.
Is fall a good time to visit Hornsby?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is one of the better times to visit Hornsby for general sightseeing.
What to pack for Hornsby in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Hornsby sees daytime highs around 23°C and nights near 13°C. Worth packing: light clothes, rain gear and sun protection. About 25 days see rain.
Sea temperature near Hornsby in Fall
The nearest coast averages about 22°C across fall — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 27 km away) is warmest in February at about 23°C and coldest in August near 18°C.
It's comfortable for a long swim from Nov 16 to Jun 4 — about 6.6 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 23 | 23 | 23 | 22 | 21 | 20 | 19 | 18 | 18 | 19 | 20 | 21 |
| Comfort | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Cool | Cool | Cool | Cool | Cool | Refreshing | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 23 | Refreshing |
| Feb | 23 | Refreshing |
| Mar | 23 | Refreshing |
| Apr | 22 | Refreshing |
| May | 21 | Refreshing |
| Jun | 20 | Cool |
| Jul | 19 | Cool |
| Aug | 18 | Cool |
| Sep | 18 | Cool |
| Oct | 19 | Cool |
| Nov | 20 | Refreshing |
| Dec | 21 | Refreshing |
UV index in Hornsby in Fall
Clear-sky midday UV across fall averages around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Hornsby peaks around January 16 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 2 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 12 | 11 | 9 | 6 | 4 | 2 | 3 | 4 | 6 | 8 | 10 | 12 |
| Level | Extreme | Extreme | Very high | High | Moderate | Moderate | Moderate | Moderate | High | Very high | Very high | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 12 | Extreme |
| Feb | 11 | Extreme |
| Mar | 9 | Very high |
| Apr | 6 | High |
| May | 4 | Moderate |
| Jun | 2 | Moderate |
| Jul | 3 | Moderate |
| Aug | 4 | Moderate |
| Sep | 6 | High |
| Oct | 8 | Very high |
| Nov | 10 | Very high |
| Dec | 12 | Extreme |
Air quality in Hornsby in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.
Air quality in Hornsby is worst in December — around 49 µg/m³ PM2.5 (poor), about 8.1× the cleanest month (June, 6 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 11 | 7 | 7 | 8 | 8 | 6 | 6 | 8 | 10 | 10 | 25 | 49 |
| Level | Good | Good | Good | Good | Good | Good | Good | Good | Good | Good | Moderate | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 11 | Good |
| Feb | 7 | Good |
| Mar | 7 | Good |
| Apr | 8 | Good |
| May | 8 | Good |
| Jun | 6 | Good |
| Jul | 6 | Good |
| Aug | 8 | Good |
| Sep | 10 | Good |
| Oct | 10 | Good |
| Nov | 25 | Moderate |
| Dec | 49 | Poor |
Where is Hornsby?
Hornsby sits at 33.7°S, 151.1°E, 186 m above sea level, in Australia. The nearest listed city is Wahroonga, 2.0 km away.
Topography around Hornsby
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Hornsby.
Within 3 km, the terrain around Hornsby has only modest variations in elevation — a maximum elevation change of 180 m around an average of 167 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 254 m; within 80 km, large variations in elevation — a maximum elevation change of 1,136 m.
The land around Hornsby is covered by trees (80%) within 3 km, trees (76%) within 16 km, and trees (58%) and water (29%) 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 Hornsby (-33.7024°, 151.0993°, elevation 186 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.