Climate and average weather in Whyalla
In Whyalla, the summers are hot, dry, and mostly clear and the winters are mild and mostly clear.
Over the course of the year, the temperature in Whyalla typically varies from 7°C to 31°C, and is rarely below 4°C or above 41°C. January is the hottest month of the year, while July is the coldest.
Based on the travel score, the best times of year to visit Whyalla for warm-weather activities are from early March to early June and early August to early December.
- Hottest
- Jan
- 31°
- Coldest
- Jul
- 7°
- Wettest
- Dec
- 30 mm
- Driest
- Mar
- 13 mm
- Rain / yr
- 258 mm
- 44 wet days
- Daylight
- 9.8–14.2 h
- shortest–longest
- Elevation
- 20 m
- 33.0°S
- Clearest
- Jan
- 32% cloud
Whyalla is city in South Australia.
- Air quality
- Good
- PM10 22.2 µg/m³ · 2019
- Founded
- 1901
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Whyalla weather by month, at a glance
The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.
Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around early August to early December.
Temperature through the year
Daily average highs and lows in Whyalla, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
The hot season lasts 4.0 months, from November 16 to March 18, with daily high temperatures above 28°C. The hottest month of the year in Whyalla is January, with an average high of 31°C and low of 18°C.
The cool season lasts 3.1 months, from May 23 to August 25, with daily high temperatures below 20°C. The coldest month of the year in Whyalla is July, with an average low of 7°C and high of 17°C.
Days typically run about 12°C warmer than nights, with the widest day–night swing (around 13°C) in October.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 31 | 28 | 25 | 20 | 17 | 17 | 19 | 22 | 25 | 28 | 30 |
| Avg low (°C) | 18 | 18 | 16 | 13 | 10 | 8 | 7 | 7 | 9 | 12 | 14 | 16 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 31 | 18 |
| Feb | 31 | 18 |
| Mar | 28 | 16 |
| Apr | 25 | 13 |
| May | 20 | 10 |
| Jun | 17 | 8 |
| Jul | 17 | 7 |
| Aug | 19 | 7 |
| Sep | 22 | 9 |
| Oct | 25 | 12 |
| Nov | 28 | 14 |
| Dec | 30 | 16 |
Average hourly temperature in Whyalla
A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on January afternoons, near 31°C, and coldest before dawn in July, near 7°C.
Whyalla weather by month
Every month at a glance. Click a month for its detailed page.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 31° / 18° | 20 | 2.6 | 13.9 | 5.3 |
| Feb | 31° / 18° | 21 | 2 | 13.2 | 5.8 |
| Mar | 28° / 16° | 13 | 2.3 | 12.3 | 7.2 |
| Apr | 25° / 13° | 19 | 3 | 11.2 | 8.2 |
| May | 20° / 10° | 19 | 3.8 | 10.3 | 7.4 |
| Jun | 17° / 8° | 25 | 4.9 | 9.9 | 6.3 |
| Jul | 17° / 7° | 19 | 4.2 | 10 | 6.3 |
| Aug | 19° / 7° | 20 | 5 | 10.8 | 7.0 |
| Sep | 22° / 9° | 28 | 4.7 | 11.8 | 7.7 |
| Oct | 25° / 12° | 22 | 3.7 | 12.8 | 8.1 |
| Nov | 28° / 14° | 24 | 3.7 | 13.7 | 7.2 |
| Dec | 30° / 16° | 30 | 4.1 | 14.1 | 6.1 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Whyalla gets about 258 mm of precipitation a year. On a typical day the chance of rain is mostly dry, but that rises and falls sharply with the seasons.
The wetter season lasts 4.9 months, from around May 17 to Oct 11, peaking in June at about 17% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Feb 18.
December is the wettest month by volume, with 30 mm over about 4 wet days; March is the driest, with 13 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 8 | 7 | 8 | 10 | 13 | 15 | 14 | 16 | 16 | 12 | 13 | 12 |
| Rain days | 3 | 2 | 2 | 3 | 4 | 5 | 4 | 5 | 5 | 4 | 4 | 4 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 8 | 3 |
| Feb | 7 | 2 |
| Mar | 8 | 2 |
| Apr | 10 | 3 |
| May | 13 | 4 |
| Jun | 15 | 5 |
| Jul | 14 | 4 |
| Aug | 16 | 5 |
| Sep | 16 | 5 |
| Oct | 12 | 4 |
| Nov | 13 | 4 |
| Dec | 12 | 4 |
Monthly rainfall
Over a full year, Whyalla collects about 258 mm of rain across 44 wet days — roughly 22 mm in an average month.
It doesn’t fall evenly. December is the wettest month with 30 mm, while March is the driest at just 13 mm. The three wettest months alone bring about 32% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 20 | 21 | 13 | 19 | 19 | 25 | 19 | 20 | 28 | 22 | 24 | 30 |
| Rain days | 3 | 2 | 2 | 3 | 4 | 5 | 4 | 5 | 5 | 4 | 4 | 4 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 20 | 3 |
| Feb | 21 | 2 |
| Mar | 13 | 2 |
| Apr | 19 | 3 |
| May | 19 | 4 |
| Jun | 25 | 5 |
| Jul | 19 | 4 |
| Aug | 20 | 5 |
| Sep | 28 | 5 |
| Oct | 22 | 4 |
| Nov | 24 | 4 |
| Dec | 30 | 4 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Whyalla, the average share of the sky covered by clouds shows moderate seasonal variation over the course of the year.
The clearer part of the year begins around November 22 and lasts for 3.9 months, ending around March 20. The clearest month is January, when the sky is clear, mostly clear, or partly cloudy 76% of the time on average.
The cloudier part of the year begins around March 21 and lasts for 5.8 months, ending around September 12. The cloudiest month is June, when it is overcast or mostly cloudy 42% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 76 | 76 | 70 | 61 | 58 | 58 | 64 | 62 | 66 | 64 | 64 | 69 |
| Cloudier (%) | 24 | 24 | 30 | 39 | 42 | 42 | 36 | 38 | 34 | 36 | 36 | 31 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 76 | 24 |
| Feb | 76 | 24 |
| Mar | 70 | 30 |
| Apr | 61 | 39 |
| May | 58 | 42 |
| Jun | 58 | 42 |
| Jul | 64 | 36 |
| Aug | 62 | 38 |
| Sep | 66 | 34 |
| Oct | 64 | 36 |
| Nov | 64 | 36 |
| Dec | 69 | 31 |
Daylight, sunrise and sunset
Hours of daylight through the year, with sunrise and sunset times.
The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around December 13, brings about 14 h 12 min of light; the shortest, around June 14, only 9 h 48 min — a swing of roughly 4 h 24 min.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 13.9 | 13.2 | 12.3 | 11.2 | 10.3 | 9.9 | 10.0 | 10.8 | 11.8 | 12.8 | 13.7 | 14.1 |
| Sunrise (AM) | 6:30 | 6:58 | 7:22 | 7:44 | 8:07 | 8:25 | 8:25 | 8:01 | 7:20 | 6:40 | 6:13 | 6:11 |
| Sunset (PM) | 8:28 | 8:11 | 7:37 | 6:55 | 6:25 | 6:15 | 6:26 | 6:47 | 7:08 | 7:30 | 7:57 | 8:21 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 13.9 | 6:30 | 8:28 |
| Feb | 13.2 | 6:58 | 8:11 |
| Mar | 12.3 | 7:22 | 7:37 |
| Apr | 11.2 | 7:44 | 6:55 |
| May | 10.3 | 8:07 | 6:25 |
| Jun | 9.9 | 8:25 | 6:15 |
| Jul | 10.0 | 8:25 | 6:26 |
| Aug | 10.8 | 8:01 | 6:47 |
| Sep | 11.8 | 7:20 | 7:08 |
| Oct | 12.8 | 6:40 | 7:30 |
| Nov | 13.7 | 6:13 | 7:57 |
| Dec | 14.1 | 6:11 | 8:21 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Whyalla averages about 15 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 9 and 20 days.
The sunnier stretch runs 4.2 months, from around Nov 17 to Mar 24. The sunniest month is March, with roughly 17 sunny days (bright).
The greyest month is June, down near 11 sunny days — about 39% fewer than the March peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 20 | 18 | 18 | 14 | 12 | 10 | 12 | 12 | 14 | 15 | 14 | 17 |
| Sky | Bright | Bright | Bright | Mixed | Mixed | Mixed | Mixed | Mixed | Mixed | Mixed | Mixed | Bright |
| Sunny days | Sky | |
|---|---|---|
| Jan | 20 | Bright |
| Feb | 18 | Bright |
| Mar | 18 | Bright |
| Apr | 14 | Mixed |
| May | 12 | Mixed |
| Jun | 10 | Mixed |
| Jul | 12 | Mixed |
| Aug | 12 | Mixed |
| Sep | 14 | Mixed |
| Oct | 15 | Mixed |
| Nov | 14 | Mixed |
| Dec | 17 | Bright |
Humidity comfort
Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.
Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.
In Whyalla, how humid it feels changes noticeably over the year.
The more humid part of the year lasts 4.0 months, from around November 30 to March 30. The muggiest month is February, when the air feels humid, muggy or worse about 15% of the time.
The most comfortable stretch runs from around March 31 to November 29, and May is the most comfortable month — the air is dry or comfortable 100% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 63 | 59 | 73 | 88 | 97 | 99 | 100 | 100 | 99 | 97 | 89 | 80 |
| Comfortable (%) | 24 | 26 | 17 | 9 | 3 | 1 | 0 | 0 | 1 | 3 | 8 | 13 |
| Humid (%) | 9 | 11 | 7 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 6 |
| Muggy (%) | 3 | 4 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Oppressive (%) | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| Jan | 63 | 24 | 9 | 3 | 1 |
| Feb | 59 | 26 | 11 | 4 | 0 |
| Mar | 73 | 17 | 7 | 2 | 0 |
| Apr | 88 | 9 | 2 | 0 | 0 |
| May | 97 | 3 | 0 | 0 | 0 |
| Jun | 99 | 1 | 0 | 0 | 0 |
| Jul | 100 | 0 | 0 | 0 | 0 |
| Aug | 100 | 0 | 0 | 0 | 0 |
| Sep | 99 | 1 | 0 | 0 | 0 |
| Oct | 97 | 3 | 0 | 0 | 0 |
| Nov | 89 | 8 | 3 | 0 | 0 |
| Dec | 80 | 13 | 6 | 1 | 0 |
Wind
Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.
This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.
Across the year, average wind speed in Whyalla is typically light breeze, near 14 km/h, and varies moderately with the seasons.
The windier part of the year lasts 6.2 months, from around Sep 7 to Mar 13. The windiest month is January, averaging about 17 km/h (light breeze).
The calmer part of the year runs from around Mar 14 to Sep 6, with May the calmest month at about 12 km/h.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 17 | 16 | 14 | 12 | 12 | 12 | 13 | 14 | 15 | 15 | 16 | 16 |
| Feels | light breeze | light breeze | light breeze | light breeze | calm | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 17 | light breeze |
| Feb | 16 | light breeze |
| Mar | 14 | light breeze |
| Apr | 12 | light breeze |
| May | 12 | calm |
| Jun | 12 | light breeze |
| Jul | 13 | light breeze |
| Aug | 14 | light breeze |
| Sep | 15 | light breeze |
| Oct | 15 | light breeze |
| Nov | 16 | light breeze |
| Dec | 16 | light breeze |
Hazard calendar for Whyalla
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
Whyalla sits in the South Indian Ocean cyclone belt; the season peaks January–March.
Best time to visit Whyalla
To characterize how pleasant the weather is in Whyalla throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around mid August, Whyalla is still near the start of its best-weather window — great conditions with the peak-season crowds not yet at full swing.
Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.
The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best times of year to visit Whyalla for general outdoor tourist activities run from early March to early June and again from late July to early December, with a peak score in the third week of April.
The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Travel score (0–10) | 5.4 | 5.8 | 7.2 | 8.1 | 7.4 | 6.3 | 6.3 | 7.0 | 7.8 | 8.1 | 7.2 | 6.1 |
| Rating | fair | good | good | ideal | good | good | good | good | ideal | ideal | good | good |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 5.4 | fair |
| Feb | 5.8 | good |
| Mar | 7.2 | good |
| Apr | 8.1 | ideal |
| May | 7.4 | good |
| Jun | 6.3 | good |
| Jul | 6.3 | good |
| Aug | 7.0 | good |
| Sep | 7.8 | ideal |
| Oct | 8.1 | ideal |
| Nov | 7.2 | good |
| Dec | 6.1 | good |
The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best time of year to visit Whyalla for hot-weather activities is from early October to late April, with a peak score in the second week of March.
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
What to pack for Whyalla, by month
Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.
For a warm-season trip around January (highs near 31°C), the essentials are light clothes and sun protection. In the cold season around July (highs near 17°C), pack a warm layer.
In January, Whyalla sees daytime highs around 31°C and nights near 18°C. Pack light clothes and sun protection.
Sea temperature near Whyalla
Average ocean temperature at the nearest coast, month by month, banded into swim-comfort zones — the other half of the beach question.
The sea offshore is warmest in February at about 23°C and coldest in August near 13°C.
It's comfortable for a long swim from Nov 28 to Apr 16 — about 4.6 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 | 22 | 20 | 18 | 15 | 14 | 13 | 15 | 17 | 19 | 21 |
| Comfort | Refreshing | Refreshing | Refreshing | Refreshing | Cool | Cool | Bracing | Bracing | Bracing | Cool | Cool | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 23 | Refreshing |
| Feb | 23 | Refreshing |
| Mar | 22 | Refreshing |
| Apr | 20 | Refreshing |
| May | 18 | Cool |
| Jun | 15 | Cool |
| Jul | 14 | Bracing |
| Aug | 13 | Bracing |
| Sep | 15 | Bracing |
| Oct | 17 | Cool |
| Nov | 19 | Cool |
| Dec | 21 | Refreshing |
UV index (midday) in Whyalla by month
Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.
Under clear skies, the midday UV index in Whyalla peaks around January 1 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 3 (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) | 13 | 12 | 10 | 6 | 3 | 3 | 3 | 4 | 6 | 8 | 11 | 13 |
| Level | Extreme | Extreme | Very high | High | Moderate | Moderate | Moderate | Moderate | High | Very high | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 13 | Extreme |
| Feb | 12 | Extreme |
| Mar | 10 | Very high |
| Apr | 6 | High |
| May | 3 | Moderate |
| Jun | 3 | Moderate |
| Jul | 3 | Moderate |
| Aug | 4 | Moderate |
| Sep | 6 | High |
| Oct | 8 | Very high |
| Nov | 11 | Extreme |
| Dec | 13 | Extreme |
Average hourly UV index in Whyalla
Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.
The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
UV falls off far faster than brightness as the sun drops, so even in January the burn window is concentrated in the middle of the day: about 9 hours a day reach index 3 (protection recommended), and 7 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV ≥ 3 (h/day) | 9 | 8.5 | 7.5 | 5.5 | 2.5 | 0 | 0 | 4 | 6 | 7 | 8.5 | 9 |
| UV ≥ 6 (h/day) | 7 | 6 | 5 | 0 | 0 | 0 | 0 | 0 | 0.5 | 4 | 6 | 7 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 9 | 7 |
| Feb | 8.5 | 6 |
| Mar | 7.5 | 5 |
| Apr | 5.5 | 0 |
| May | 2.5 | 0 |
| Jun | 0 | 0 |
| Jul | 0 | 0 |
| Aug | 4 | 0 |
| Sep | 6 | 0.5 |
| Oct | 7 | 4 |
| Nov | 8.5 | 6 |
| Dec | 9 | 7 |
Growing season
Whyalla is frost-free year round — even the coldest nights rarely reach freezing, so there is no start or end to the growing season.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Frost-free chance (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Frost nights | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Frost-free chance (%) | Frost nights | |
|---|---|---|
| Jan | 100 | 0 |
| Feb | 100 | 0 |
| Mar | 100 | 0 |
| Apr | 100 | 0 |
| May | 100 | 0 |
| Jun | 100 | 0 |
| Jul | 100 | 0 |
| Aug | 100 | 0 |
| Sep | 100 | 0 |
| Oct | 100 | 0 |
| Nov | 100 | 0 |
| Dec | 100 | 0 |
Growing degree days
Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Whyalla banks about 3,070 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around January.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 460 | 407 | 379 | 266 | 163 | 78 | 61 | 94 | 171 | 257 | 329 | 404 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 460 |
| Feb | 407 |
| Mar | 379 |
| Apr | 266 |
| May | 163 |
| Jun | 78 |
| Jul | 61 |
| Aug | 94 |
| Sep | 171 |
| Oct | 257 |
| Nov | 329 |
| Dec | 404 |
Solar energy
Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.
Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.
Whyalla receives about 5.2 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 2.4 and 8.2 kWh/m².
The brighter stretch of the year lasts 6.1 months, from around Sep 22 to Mar 26. The brightest month is January, averaging about 7.8 kWh/m² (intense).
The dimmest month is June, down near 2.5 kWh/m² — roughly 68% less than the January peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 8.0 | 7.1 | 5.8 | 4.3 | 3.1 | 2.5 | 2.6 | 3.5 | 4.9 | 6.3 | 7.2 | 7.7 |
| Level | Intense | Intense | Bright | Bright | Moderate | Moderate | Moderate | Moderate | Bright | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 8.0 | Intense |
| Feb | 7.1 | Intense |
| Mar | 5.8 | Bright |
| Apr | 4.3 | Bright |
| May | 3.1 | Moderate |
| Jun | 2.5 | Moderate |
| Jul | 2.6 | Moderate |
| Aug | 3.5 | Moderate |
| Sep | 4.9 | Bright |
| Oct | 6.3 | Intense |
| Nov | 7.2 | Intense |
| Dec | 7.7 | Intense |
Where is Whyalla?
Whyalla sits at 33.0°S, 137.6°E, 20 m above sea level, in Australia. The nearest listed city is Gawler, 206 km away.
Topography around Whyalla
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Whyalla.
Within 3 km, the terrain around Whyalla has only modest variations in elevation — a maximum elevation change of 63 m around an average of 14 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 169 m; within 80 km, large variations in elevation — a maximum elevation change of 946 m.
The land around Whyalla is covered by artificial surfaces (32%) within 3 km, water (45%), grassland (26%) and shrubs (21%) within 16 km, and grassland (33%) and water (22%) 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 Whyalla (-33.0327°, 137.5648°, elevation 20 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).