Climate and average weather in Dianella
In Dianella, the summers are hot, dry, and clear and the winters are mild and mostly clear.
Over the course of the year, the temperature in Dianella typically varies from 11°C to 29°C, and is rarely below 8°C or above 34°C. February is the hottest month of the year, while July is the coldest.
Based on the travel score, the best time of year to visit Dianella for warm-weather activities is from late September to late May.
- Hottest
- Feb
- 29°
- Coldest
- Jul
- 11°
- Wettest
- Jul
- 102 mm
- Driest
- Dec
- 9 mm
- Rain / yr
- 543 mm
- 70 wet days
- Daylight
- 9.9–14.1 h
- shortest–longest
- Elevation
- 30 m
- 31.9°S
- Clearest
- Jan
- 22% cloud
Dianella is suburb of Perth, Western Australia.
- Density
- 2,238/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Dianella 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 late September to late May.
Temperature through the year
Daily average highs and lows in Dianella, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
The hot season lasts 3.5 months, from December 11 to March 25, with daily high temperatures above 26°C. The hottest month of the year in Dianella is February, with an average high of 29°C and low of 20°C.
The cool season lasts 4.0 months, from May 31 to September 30, with daily high temperatures below 19°C. The coldest month of the year in Dianella is July, with an average low of 11°C and high of 17°C.
Days typically run about 8°C warmer than nights, with the widest day–night swing (around 9°C) in January.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 29 | 27 | 24 | 21 | 18 | 17 | 18 | 19 | 21 | 24 | 27 |
| Avg low (°C) | 19 | 20 | 19 | 16 | 14 | 12 | 11 | 11 | 12 | 13 | 16 | 18 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 29 | 19 |
| Feb | 29 | 20 |
| Mar | 27 | 19 |
| Apr | 24 | 16 |
| May | 21 | 14 |
| Jun | 18 | 12 |
| Jul | 17 | 11 |
| Aug | 18 | 11 |
| Sep | 19 | 12 |
| Oct | 21 | 13 |
| Nov | 24 | 16 |
| Dec | 27 | 18 |
Average hourly temperature in Dianella
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 February afternoons, near 29°C, and coldest before dawn in July, near 11°C.
Dianella 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 | 29° / 19° | 17 | 1.8 | 13.8 | 7.4 |
| Feb | 29° / 20° | 17 | 1.5 | 13.2 | 7.2 |
| Mar | 27° / 19° | 18 | 2.3 | 12.2 | 7.8 |
| Apr | 24° / 16° | 24 | 4.1 | 11.2 | 8.1 |
| May | 21° / 14° | 67 | 7.8 | 10.4 | 7.1 |
| Jun | 18° / 12° | 98 | 10.7 | 10 | 6.1 |
| Jul | 17° / 11° | 102 | 12.5 | 10.1 | 5.5 |
| Aug | 18° / 11° | 89 | 11.1 | 10.8 | 5.8 |
| Sep | 19° / 12° | 55 | 8.5 | 11.8 | 6.5 |
| Oct | 21° / 13° | 27 | 4.7 | 12.8 | 7.6 |
| Nov | 24° / 16° | 19 | 3.7 | 13.6 | 8.4 |
| Dec | 27° / 18° | 9 | 1.6 | 14 | 8.4 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Dianella gets about 543 mm of precipitation a year. On a typical day the chance of rain is some rain, but that rises and falls sharply with the seasons.
The wetter season lasts 5.1 months, from around May 3 to Oct 4, peaking in July at about 41% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Dec 29.
July is the wettest month by volume, with 102 mm over about 13 wet days; December is the driest, with 9 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 5 | 5 | 8 | 14 | 25 | 36 | 40 | 36 | 28 | 16 | 12 | 6 |
| Rain days | 2 | 2 | 2 | 4 | 8 | 11 | 13 | 11 | 9 | 5 | 4 | 2 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 5 | 2 |
| Feb | 5 | 2 |
| Mar | 8 | 2 |
| Apr | 14 | 4 |
| May | 25 | 8 |
| Jun | 36 | 11 |
| Jul | 40 | 13 |
| Aug | 36 | 11 |
| Sep | 28 | 9 |
| Oct | 16 | 5 |
| Nov | 12 | 4 |
| Dec | 6 | 2 |
Monthly rainfall
Over a full year, Dianella collects about 543 mm of rain across 70 wet days — roughly 45 mm in an average month.
It doesn’t fall evenly. July is the wettest month with 102 mm, while December is the driest at just 9 mm. The three wettest months alone bring about 53% of the year’s total.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 17 | 17 | 18 | 24 | 67 | 98 | 102 | 89 | 55 | 27 | 19 | 9 |
| Rain days | 2 | 2 | 2 | 4 | 8 | 11 | 13 | 11 | 9 | 5 | 4 | 2 |
| Rainfall (mm) | Rain days | |
|---|---|---|
| Jan | 17 | 2 |
| Feb | 17 | 2 |
| Mar | 18 | 2 |
| Apr | 24 | 4 |
| May | 67 | 8 |
| Jun | 98 | 11 |
| Jul | 102 | 13 |
| Aug | 89 | 11 |
| Sep | 55 | 9 |
| Oct | 27 | 5 |
| Nov | 19 | 4 |
| Dec | 9 | 2 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Dianella, 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 October 30 and lasts for 4.9 months, ending around March 27. The clearest month is January, when the sky is clear, mostly clear, or partly cloudy 86% of the time on average.
The cloudier part of the year begins around March 28 and lasts for 7.1 months, ending around October 29. The cloudiest month is June, when it is overcast or mostly cloudy 36% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 86 | 85 | 77 | 69 | 66 | 64 | 65 | 65 | 64 | 70 | 75 | 82 |
| Cloudier (%) | 14 | 15 | 23 | 31 | 34 | 36 | 35 | 35 | 36 | 30 | 25 | 18 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 86 | 14 |
| Feb | 85 | 15 |
| Mar | 77 | 23 |
| Apr | 69 | 31 |
| May | 66 | 34 |
| Jun | 64 | 36 |
| Jul | 65 | 35 |
| Aug | 65 | 35 |
| Sep | 64 | 36 |
| Oct | 70 | 30 |
| Nov | 75 | 25 |
| Dec | 82 | 18 |
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 January 1, brings about 14 h 06 min of light; the shortest, around June 13, only 9 h 54 min — a swing of roughly 4 h 12 min.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 13.8 | 13.2 | 12.2 | 11.2 | 10.4 | 10.0 | 10.1 | 10.8 | 11.8 | 12.8 | 13.6 | 14.0 |
| Sunrise (AM) | 5:30 | 5:56 | 6:19 | 6:40 | 7:01 | 7:19 | 7:19 | 6:56 | 6:17 | 5:38 | 5:12 | 5:10 |
| Sunset (PM) | 7:22 | 7:06 | 6:33 | 5:53 | 5:24 | 5:15 | 5:25 | 5:45 | 6:05 | 6:25 | 6:51 | 7:15 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 13.8 | 5:30 | 7:22 |
| Feb | 13.2 | 5:56 | 7:06 |
| Mar | 12.2 | 6:19 | 6:33 |
| Apr | 11.2 | 6:40 | 5:53 |
| May | 10.4 | 7:01 | 5:24 |
| Jun | 10.0 | 7:19 | 5:15 |
| Jul | 10.1 | 7:19 | 5:25 |
| Aug | 10.8 | 6:56 | 5:45 |
| Sep | 11.8 | 6:17 | 6:05 |
| Oct | 12.8 | 5:38 | 6:25 |
| Nov | 13.6 | 5:12 | 6:51 |
| Dec | 14.0 | 5:10 | 7:15 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Dianella averages about 16 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 9 and 24 days.
The sunnier stretch runs 5.6 months, from around Oct 24 to Apr 10. The sunniest month is January, with roughly 23 sunny days (brilliant).
The greyest month is July, down near 10 sunny days — about 56% fewer than the January peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 24 | 21 | 20 | 15 | 13 | 11 | 10 | 11 | 12 | 15 | 17 | 22 |
| Sky | Brilliant | Bright | Bright | Bright | Mixed | Mixed | Mixed | Mixed | Mixed | Mixed | Bright | Bright |
| Sunny days | Sky | |
|---|---|---|
| Jan | 24 | Brilliant |
| Feb | 21 | Bright |
| Mar | 20 | Bright |
| Apr | 15 | Bright |
| May | 13 | Mixed |
| Jun | 11 | Mixed |
| Jul | 10 | Mixed |
| Aug | 11 | Mixed |
| Sep | 12 | Mixed |
| Oct | 15 | Mixed |
| Nov | 17 | Bright |
| Dec | 22 | 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 Dianella, how humid it feels changes dramatically over the year.
The more humid part of the year lasts 4.6 months, from around December 9 to April 26. The muggiest month is February, when the air feels humid, muggy or worse about 36% of the time.
The most comfortable stretch runs from around April 27 to December 8, and July 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 (%) | 33 | 31 | 39 | 48 | 70 | 88 | 93 | 92 | 90 | 79 | 64 | 50 |
| Comfortable (%) | 38 | 33 | 33 | 35 | 25 | 11 | 6 | 7 | 10 | 18 | 29 | 35 |
| Humid (%) | 22 | 28 | 20 | 16 | 5 | 1 | 0 | 0 | 0 | 2 | 7 | 13 |
| Muggy (%) | 7 | 8 | 8 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
| Oppressive (%) | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| Jan | 33 | 38 | 22 | 7 | 1 |
| Feb | 31 | 33 | 28 | 8 | 1 |
| Mar | 39 | 33 | 20 | 8 | 0 |
| Apr | 48 | 35 | 16 | 2 | 0 |
| May | 70 | 25 | 5 | 0 | 0 |
| Jun | 88 | 11 | 1 | 0 | 0 |
| Jul | 93 | 6 | 0 | 0 | 0 |
| Aug | 92 | 7 | 0 | 0 | 0 |
| Sep | 90 | 10 | 0 | 0 | 0 |
| Oct | 79 | 18 | 2 | 0 | 0 |
| Nov | 64 | 29 | 7 | 0 | 0 |
| Dec | 50 | 35 | 13 | 2 | 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 Dianella is typically light breeze, near 18 km/h, and varies moderately with the seasons.
The windier part of the year lasts 5.1 months, from around Oct 18 to Mar 20. The windiest month is December, averaging about 20 km/h (breezy).
The calmer part of the year runs from around Mar 21 to Oct 17, with April the calmest month at about 16 km/h.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 20 | 20 | 18 | 16 | 16 | 17 | 17 | 17 | 17 | 18 | 19 | 20 |
| Feels | breezy | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | breezy |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 20 | breezy |
| Feb | 20 | light breeze |
| Mar | 18 | light breeze |
| Apr | 16 | light breeze |
| May | 16 | light breeze |
| Jun | 17 | light breeze |
| Jul | 17 | light breeze |
| Aug | 17 | light breeze |
| Sep | 17 | light breeze |
| Oct | 18 | light breeze |
| Nov | 19 | light breeze |
| Dec | 20 | breezy |
Hazard calendar for Dianella
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
Dianella sits in the South Indian Ocean cyclone belt; the season peaks January–March.
Dianella's rainy season runs May–September, when most of the year's rain falls.
Best time to visit Dianella
To characterize how pleasant the weather is in Dianella throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around mid May, Dianella is still near the tail of its best-weather window — great conditions with the peak-season crowds already thinning.
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 time of year to visit Dianella for general outdoor tourist activities is from late September to late May, with a peak score in the last week of November.
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) | 7.5 | 7.2 | 7.8 | 8.1 | 7.1 | 6.1 | 5.5 | 5.8 | 6.5 | 7.6 | 8.4 | 8.4 |
| Rating | good | good | ideal | ideal | good | good | good | good | good | ideal | ideal | ideal |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 7.5 | good |
| Feb | 7.2 | good |
| Mar | 7.8 | ideal |
| Apr | 8.1 | ideal |
| May | 7.1 | good |
| Jun | 6.1 | good |
| Jul | 5.5 | good |
| Aug | 5.8 | good |
| Sep | 6.5 | good |
| Oct | 7.6 | ideal |
| Nov | 8.4 | ideal |
| Dec | 8.4 | ideal |
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 Dianella for hot-weather activities is from mid November to mid April, with a peak score in the third week of February.
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 Dianella, 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 February (highs near 29°C), the essentials are light clothes and sun protection. In the cold season around July (highs near 17°C), pack rain gear.
In February, Dianella sees daytime highs around 29°C and nights near 20°C. Pack light clothes and sun protection.
Sea temperature near Dianella
Average ocean temperature at the nearest coast, month by month, banded into swim-comfort zones — the other half of the beach question.
The sea at the nearest coast (about 23 km away) is warmest in February at about 22°C and coldest in September near 19°C.
It's comfortable for a long swim from Nov 22 to Jul 12 — about 7.7 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 22 | 22 | 22 | 22 | 22 | 21 | 20 | 19 | 19 | 19 | 20 | 21 |
| Comfort | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Cool | Cool | Cool | Cool | Cool | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 22 | Refreshing |
| Feb | 22 | Refreshing |
| Mar | 22 | Refreshing |
| Apr | 22 | Refreshing |
| May | 22 | Refreshing |
| Jun | 21 | Refreshing |
| Jul | 20 | Cool |
| Aug | 19 | Cool |
| Sep | 19 | Cool |
| Oct | 19 | Cool |
| Nov | 20 | Cool |
| Dec | 21 | Refreshing |
UV index (midday) in Dianella 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 Dianella peaks around December 23 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 3 (moderate).
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) | 13 | 12 | 11 | 6 | 4 | 3 | 3 | 5 | 8 | 9 | 10 | 13 |
| Level | Extreme | Extreme | Extreme | High | Moderate | Moderate | Moderate | Moderate | Very high | Very high | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 13 | Extreme |
| Feb | 12 | Extreme |
| Mar | 11 | Extreme |
| Apr | 6 | High |
| May | 4 | Moderate |
| Jun | 3 | Moderate |
| Jul | 3 | Moderate |
| Aug | 5 | Moderate |
| Sep | 8 | Very high |
| Oct | 9 | Very high |
| Nov | 10 | Extreme |
| Dec | 13 | Extreme |
Average hourly UV index in Dianella
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 December 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 | 6 | 4 | 2 | 2.5 | 4.5 | 6.5 | 7.5 | 8.5 | 9 |
| UV ≥ 6 (h/day) | 7 | 6.5 | 5.5 | 2 | 0 | 0 | 0 | 0 | 3.5 | 5 | 6 | 7 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 9 | 7 |
| Feb | 8.5 | 6.5 |
| Mar | 7.5 | 5.5 |
| Apr | 6 | 2 |
| May | 4 | 0 |
| Jun | 2 | 0 |
| Jul | 2.5 | 0 |
| Aug | 4.5 | 0 |
| Sep | 6.5 | 3.5 |
| Oct | 7.5 | 5 |
| Nov | 8.5 | 6 |
| Dec | 9 | 7 |
Growing season
Dianella 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. Dianella banks about 3,243 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around February.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 432 | 402 | 402 | 305 | 226 | 156 | 131 | 137 | 156 | 224 | 293 | 377 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 432 |
| Feb | 402 |
| Mar | 402 |
| Apr | 305 |
| May | 226 |
| Jun | 156 |
| Jul | 131 |
| Aug | 137 |
| Sep | 156 |
| Oct | 224 |
| Nov | 293 |
| Dec | 377 |
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.
Dianella receives about 5.5 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 2.5 and 8.7 kWh/m².
The brighter stretch of the year lasts 5.9 months, from around Sep 28 to Mar 26. The brightest month is December, averaging about 8.4 kWh/m² (intense).
The dimmest month is June, down near 2.6 kWh/m² — roughly 69% less than the December peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 8.3 | 7.4 | 6.0 | 4.4 | 3.2 | 2.6 | 2.7 | 3.5 | 4.8 | 6.5 | 7.7 | 8.4 |
| Level | Intense | Intense | Intense | Bright | Moderate | Moderate | Moderate | Moderate | Bright | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 8.3 | Intense |
| Feb | 7.4 | Intense |
| Mar | 6.0 | Intense |
| Apr | 4.4 | Bright |
| May | 3.2 | Moderate |
| Jun | 2.6 | Moderate |
| Jul | 2.7 | Moderate |
| Aug | 3.5 | Moderate |
| Sep | 4.8 | Bright |
| Oct | 6.5 | Intense |
| Nov | 7.7 | Intense |
| Dec | 8.4 | Intense |
Where is Dianella?
Dianella sits at 31.9°S, 115.9°E, 30 m above sea level, in Australia. The nearest listed city is Morley, 4.0 km away.
Topography around Dianella
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Dianella.
Within 3 km, the terrain around Dianella has only modest variations in elevation — a maximum elevation change of 64 m around an average of 42 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 105 m; within 80 km, significant variations in elevation — a maximum elevation change of 567 m.
The land around Dianella is covered by artificial surfaces (77%) within 3 km, artificial surfaces (49%) within 16 km, and trees (40%) and water (31%) 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 Dianella (-31.8882°, 115.8719°, 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. 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).