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Weather in Williamstown
South Australia, 285 m · continuously updated
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Temperature · last 4 and next 28 hours
Williamstown weather: the next 24 hours
Updated hourly.
Williamstown 14-day forecast
Two-week trend.
Sun and golden hours
Sunrise –, golden light until –
Sunset –, golden light from –
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Air quality
European index, modelled by Copernicus (CAMS).
UV index
Daily maximum — protection advised from 3.
Freezing level
Snow settles about 300 m below it.
Around Williamstown
Neighbouring towns, as the crow flies.
The observed climate near Williamstown
The weather station nearest to Williamstown, Nuriootpa located 275 m above sea level, is 24 km away; its records cover 1957–2025. In November, the mean temperature there is 17.8 °C over 1991–2020, 0.7 °C more than over 1961–1990 (17.1 °C), with about 31 mm of rain. The warmest month ever measured is January 2001 (25.6 °C), the coldest July 1957 (7.0 °C). See the full series of Nuriootpa
Today in Williamstown
- Very high UV index: 8.7 around 13:00. Stay in the shade between 12:00 and 18:00. Fair skin burns in about 23 minutes: avoid exposure, cover up and use SPF 50. How it is calculated
- Best time to air the house: between 15:00 and 18:00. The outdoor dew point drops to 5 °C; once warmed to 20 °C, that air holds only 37 % humidity, against 50 % in a typical home: opening the windows dries the house. How it is calculated
- Washing outside: between 12:00 and 16:00. With 51 % humidity, 16.9 °C and wind at 10.7 km/h, a load of cotton washing dries in about 4 h. How it is calculated
- Garden: barely 0 mm of rain in 48 h against a need of about 9.1 mm. Water tomorrow, between 6:00 and 9:00, while it is cool: allow about 9 L/m². How it is calculated
- Terrace and barbecue between 18:00 and 23:00: dry, wind at 7 km/h, 12 °C at 8 pm. A lovely evening. How it is calculated
- Starry sky between 22:00 and 2:00: 12 % average cloud cover tonight, 4 h of clear sky in a row, moon at 14 % (waning crescent). A good night to look up. How it is calculated
Calculated from Open-Meteo forecasts of 2026-11-05 12:32 (local time): model values, not measurements. All of today's advice
7-day forecast for Williamstown
Today (Thursday 5 Nov) in Williamstown: sunny, 7 to 18 °C, precipitation 0.0 mm (0 %), wind up to 15 km/h. Tomorrow: overcast, 9 to 20 °C.
| Day | Weather | Min | Max | Precip. | Wind |
|---|---|---|---|---|---|
| Today | sunny | 7 °C | 18 °C | 0.0 mm | 15 km/h |
| Tomorrow | overcast | 9 °C | 20 °C | 0.0 mm | 19 km/h |
| Sat 7 Nov | overcast | 7 °C | 16 °C | 0.0 mm | 24 km/h |
| Sun 8 Nov | overcast | 7 °C | 19 °C | 0.0 mm | 26 km/h |
| Mon 9 Nov | partly cloudy | 12 °C | 26 °C | 0.0 mm | 20 km/h |
| Tue 10 Nov | overcast | 11 °C | 27 °C | 0.0 mm | 19 km/h |
| Wed 11 Nov | overcast | 8 °C | 16 °C | 0.0 mm | 26 km/h |
Tomorrow's weather in Williamstown
Tomorrow, Friday 6 Nov, in Williamstown: overcast, from 9 to 20 °C, 0.0 mm of precipitation (probability 5 %), wind up to 19 km/h.
| Hour | Weather | Temp. | Precip. | Chance | Wind |
|---|---|---|---|---|---|
| 00:00 |  sunny | 10 °C | 0.0 mm | 0 % | 3 km/h |
| 03:00 | sunny | 10 °C | 0.0 mm | 0 % | 0 km/h |
| 06:00 | sunny | 9 °C | 0.0 mm | 0 % | 3 km/h |
| 09:00 | mostly sunny | 16 °C | 0.0 mm | 0 % | 8 km/h |
| 12:00 |  overcast | 19 °C | 0.0 mm | 0 % | 15 km/h |
| 15:00 |  partly cloudy | 20 °C | 0.0 mm | 0 % | 19 km/h |
| 18:00 | sunny | 17 °C | 0.0 mm | 1 % | 15 km/h |
| 21:00 | partly cloudy | 13 °C | 0.0 mm | 3 % | 13 km/h |
Frequently asked questions
Will it rain tomorrow in Williamstown?
No significant rain expected (0.0 mm forecast).
How warm will it be tomorrow in Williamstown?
Between 9 and 20 °C.
The weekend
This weekend in Williamstown: Saturday overcast, 7 to 16 °C, Sunday overcast, 7 to 19 °C.
| Day | Weather | Min | Max | Precip. | Wind |
|---|---|---|---|---|---|
| Sat 7 Nov | overcast | 7 °C | 16 °C | 0.0 mm | 24 km/h |
| Sun 8 Nov | overcast | 7 °C | 19 °C | 0.0 mm | 26 km/h |
Hour by hour
The next 48 hours in Williamstown, hour by hour: temperature from 7 to 20 °C, 0.0 mm of rain expected.
| Hour | Weather | Temp. | Precip. | Chance | Wind |
|---|---|---|---|---|---|
| 12:00 | sunny | 17 °C | 0.0 mm | 0 % | 11 km/h |
| 13:00 | sunny | 18 °C | 0.0 mm | 0 % | 12 km/h |
| 14:00 | sunny | 18 °C | 0.0 mm | 0 % | 13 km/h |
| 15:00 | sunny | 18 °C | 0.0 mm | 0 % | 15 km/h |
| 16:00 | sunny | 18 °C | 0.0 mm | 0 % | 14 km/h |
| 17:00 | sunny | 17 °C | 0.0 mm | 0 % | 14 km/h |
| 18:00 | sunny | 16 °C | 0.0 mm | 0 % | 14 km/h |
| 19:00 | sunny | 14 °C | 0.0 mm | 0 % | 10 km/h |
| 20:00 | sunny | 12 °C | 0.0 mm | 0 % | 5 km/h |
| 21:00 | sunny | 11 °C | 0.0 mm | 0 % | 4 km/h |
| 22:00 | sunny | 10 °C | 0.0 mm | 0 % | 4 km/h |
| 23:00 | sunny | 10 °C | 0.0 mm | 0 % | 4 km/h |
| 00:00 | sunny | 10 °C | 0.0 mm | 0 % | 3 km/h |
| 01:00 | sunny | 10 °C | 0.0 mm | 0 % | 2 km/h |
| 02:00 | mostly sunny | 10 °C | 0.0 mm | 0 % | 1 km/h |
| 03:00 | sunny | 10 °C | 0.0 mm | 0 % | 0 km/h |
| 04:00 | sunny | 10 °C | 0.0 mm | 0 % | 0 km/h |
| 05:00 | sunny | 9 °C | 0.0 mm | 0 % | 3 km/h |
| 06:00 | sunny | 9 °C | 0.0 mm | 0 % | 3 km/h |
| 07:00 | sunny | 12 °C | 0.0 mm | 0 % | 4 km/h |
| 08:00 | sunny | 14 °C | 0.0 mm | 0 % | 4 km/h |
| 09:00 | mostly sunny | 16 °C | 0.0 mm | 0 % | 8 km/h |
| 10:00 | partly cloudy | 17 °C | 0.0 mm | 0 % | 12 km/h |
| 11:00 | partly cloudy | 18 °C | 0.0 mm | 0 % | 14 km/h |
| 12:00 | overcast | 19 °C | 0.0 mm | 0 % | 15 km/h |
| 13:00 | overcast | 19 °C | 0.0 mm | 0 % | 15 km/h |
| 14:00 | mostly sunny | 20 °C | 0.0 mm | 0 % | 17 km/h |
| 15:00 | partly cloudy | 20 °C | 0.0 mm | 0 % | 19 km/h |
| 16:00 | mostly sunny | 19 °C | 0.0 mm | 0 % | 18 km/h |
| 17:00 | mostly sunny | 18 °C | 0.0 mm | 1 % | 17 km/h |
| 18:00 | sunny | 17 °C | 0.0 mm | 1 % | 15 km/h |
| 19:00 | mostly sunny | 16 °C | 0.0 mm | 2 % | 13 km/h |
| 20:00 | mostly sunny | 14 °C | 0.0 mm | 3 % | 12 km/h |
| 21:00 | partly cloudy | 13 °C | 0.0 mm | 3 % | 13 km/h |
| 22:00 | overcast | 13 °C | 0.0 mm | 4 % | 13 km/h |
| 23:00 | partly cloudy | 13 °C | 0.0 mm | 5 % | 13 km/h |
| 00:00 | overcast | 12 °C | 0.0 mm | 7 % | 16 km/h |
| 01:00 | partly cloudy | 12 °C | 0.0 mm | 8 % | 15 km/h |
| 02:00 | mostly sunny | 10 °C | 0.0 mm | 9 % | 13 km/h |
| 03:00 | mostly sunny | 9 °C | 0.0 mm | 10 % | 12 km/h |
| 04:00 | mostly sunny | 8 °C | 0.0 mm | 10 % | 11 km/h |
| 05:00 | mostly sunny | 8 °C | 0.0 mm | 8 % | 9 km/h |
| 06:00 | sunny | 7 °C | 0.0 mm | 4 % | 7 km/h |
| 07:00 | sunny | 10 °C | 0.0 mm | 2 % | 13 km/h |
| 08:00 | mostly sunny | 11 °C | 0.0 mm | 1 % | 17 km/h |
| 09:00 | mostly sunny | 13 °C | 0.0 mm | 2 % | 18 km/h |
| 10:00 | mostly sunny | 14 °C | 0.0 mm | 2 % | 17 km/h |
| 11:00 | sunny | 15 °C | 0.0 mm | 1 % | 17 km/h |
Location of Williamstown
Williamstown lies at 285 m, 151 m above the average of the 112 places we cover in South Australia (134 m). That makes it the 24th highest of the 112. The main town, Adelaide, lies 39 km to the south-west. The nearest places we cover are Lyndoch (8 km to the north), Kersbrook (13 km to the south), Gawler (15 km to the north-west) and Willaston (17 km to the north-west). With about 2,689 inhabitants according to GeoNames, Williamstown is the 51st largest of the 112 places we cover in South Australia. Of the places of interest on this site, the nearest are Mount Lofty (mountain, 37 km to the south-west) and Henley Beach (beach, 46 km to the south-west).
Today is 5.4 °C below the November normal (23.4 °C).
Climate of Williamstown: 1991–2020 normals
In Williamstown, January is typically the warmest month (up to 28.3 °C on average), while July is the coldest at 6.5 °C. August sees the most rain, with around 57 mm.
By season (average highs, 1991–2020 normals): winter 13.4 °C and 161 mm of rain, spring 20.0 °C and 130 mm, summer 27.3 °C and 82 mm, autumn 20.7 °C and 94 mm. The wettest season is winter (34 % of the annual total), the driest summer (18 %).
| Max T (°C) | Min T (°C) | Rainfall (mm) | Rainy days | |
|---|---|---|---|---|
| January | 28.3 | 15.8 | 25 | 4 |
| February | 27.9 | 15.8 | 22 | 3 |
| March | 24.8 | 13.8 | 18 | 3 |
| April | 20.7 | 11.5 | 34 | 5 |
| May | 16.5 | 9.2 | 42 | 8 |
| June | 13.5 | 7.2 | 50 | 9 |
| July | 12.9 | 6.5 | 53 | 10 |
| August | 13.8 | 6.7 | 57 | 11 |
| September | 16.5 | 8.3 | 56 | 9 |
| October | 20.0 | 10.1 | 36 | 7 |
| November | 23.4 | 12.3 | 38 | 6 |
| December | 25.8 | 14.1 | 36 | 5 |
Compared with Adelaide, the main town 39 km to the south-west, highs in the warmest month are 1.8 °C higher here, and the year brings 23 mm less precipitation. In no month does the average low fall below 0 °C; in 6 months the average high exceeds 20 °C (January, February, March, April, November and December).
Nearby places with normals of their own (from another station or reanalysis grid cell) compare as follows: Lyndoch (8 km to the north): summers 1.1 °C warmer and 21 mm drier a year; Kersbrook (13 km to the south): summers 0.4 °C cooler and 49 mm wetter a year; Gawler (15 km to the north-west): summers 1.9 °C warmer and 57 mm drier a year. Among the 112 places we cover in South Australia whose normals come from the ERA5 reanalysis, Williamstown ranks 48th for summer warmth and 48th for annual precipitation. The warmest summers are in Coober Pedy and the coolest in Robe; the wettest year is in Millicent and the driest in Coober Pedy.
What is the warmest month in Williamstown?
The warmest month in Williamstown is typically January, averaging 28.3 °C (1991–2020 normal). The coldest is July, at 6.5 °C.
How many rainy days does Williamstown get per year?
Williamstown sees about 82 rainy days a year, adding up to roughly 466 mm of rainfall (1991–2020 normals).
How big is the gap between summer and winter in Williamstown?
Between January and July, the temperature gap in Williamstown runs to about 21.8 °C, based on the 1991–2020 normals.