How warm is it in Sydney in January?

Daytime highs averaged 25.9 °C, night-time lows 20.9 °C. The highest value of the past 10 years was 37.7 °C (4 Jan 2020), the lowest 16.8 °C (14 Jan 2018).

How often does it rain in Sydney in January?

On average there were 13.8 rain days (at least 1 mm) with 97.0 mm of precipitation in total.

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Sydney weather in January: temperature & rain

Photo: Diliff · CC BY-SA 3.0

🇦🇺 Weather in Sydney in January

This is what the weather in Sydney (New South Wales, Australia) was like in January over the years 2017–2026.

Key facts at a glance

Prevailing weather: Light rain

Avg. daytime high

25.9 °C

24.8 °C – 27.6 °C

Avg. night-time low

20.9 °C

20.1 °C – 21.6 °C

Avg. rain days in period

13.8

45 % of days · ≥ 1.0 mm

Avg. precipitation in period

97.0 mm

33.9 mm – 170 mm

Avg. cloud cover

61 %

This data source has no sunshine hours – average cloud cover is shown instead.

Avg. sea temperature

–

Sea temperature unavailable for today (daily limit).

Extremes: Highest temperature 37.7 °C (4 Jan 2020) · Lowest temperature 16.8 °C (14 Jan 2018) · Avg. daily peak wind 22 km/h

Weather mix of all days

51Sunny
76Partly cloudy
45Cloudy
79Light rain
59Rain

Summary

On average 25.9 °C during the day and 20.9 °C at night.
On average 13.8 rain days (Rain day = at least 1.0 mm of precipitation) with 97.0 mm of precipitation in total.
Prevailing weather: Light rain.
Warmest year: 2017 (avg. 27.6 °C), coolest: 2023 (avg. 24.8 °C).
Wettest year: 2026 (170 mm), driest: 2018 (33.9 mm).
Extremes: 37.7 °C on 4 Jan 2020 and 16.8 °C on 14 Jan 2018.

Overall values from all 10 years. How is this calculated?

Temperatures per year

Average over your travel period

Precipitation & rain days

Year by year

2026
Avg. max25.1°Avg. min20.1°
Rain days
13 Rain days
Precipitation
170 mm
Avg. cloud cover
51 % cloudy
Sea temperature
–
Max 35.5 °C · Min 17.6 °C
2025
Avg. max25.3°Avg. min20.7°
Rain days
19 Rain days
Precipitation
121 mm
Avg. cloud cover
67 % cloudy
Sea temperature
–
Max 37.1 °C · Min 18.9 °C
2024
Avg. max26.0°Avg. min21.5°
Rain days
14 Rain days
Precipitation
111 mm
Avg. cloud cover
67 % cloudy
Sea temperature
–
Max 34.1 °C · Min 18.6 °C
2023
Avg. max24.8°Avg. min20.4°
Rain days
18 Rain days
Precipitation
143 mm
Avg. cloud cover
58 % cloudy
Sea temperature
–
Max 30.7 °C · Min 17.7 °C
2022
Avg. max25.1°Avg. min21.5°
Rain days
18 Rain days
Precipitation
132 mm
Avg. cloud cover
67 % cloudy
Sea temperature
–
Max 27.8 °C · Min 19.9 °C
2021
Avg. max25.1°Avg. min20.1°
Rain days
13 Rain days
Precipitation
73.5 mm
Avg. cloud cover
57 % cloudy
Sea temperature
–
Max 32.9 °C · Min 18.1 °C
2020
Avg. max26.4°Avg. min21.3°
Rain days
14 Rain days
Precipitation
66.1 mm
Avg. cloud cover
67 % cloudy
Sea temperature
–
Max 37.7 °C · Min 19.2 °C
2019
Avg. max27.2°Avg. min21.6°
Rain days
15 Rain days
Precipitation
77.4 mm
Avg. cloud cover
56 % cloudy
Sea temperature
–
Max 34.0 °C · Min 19.4 °C
2018
Avg. max26.2°Avg. min20.4°
Rain days
6 Rain days
Precipitation
33.9 mm
Avg. cloud cover
55 % cloudy
Sea temperature
–
Max 37.5 °C · Min 16.8 °C
2017
Avg. max27.6°Avg. min21.1°
Rain days
8 Rain days
Precipitation
41.8 mm
Avg. cloud cover
62 % cloudy
Sea temperature
–
Max 35.6 °C · Min 19.4 °C

Frequently asked questions

How warm is it in Sydney in January?: Daytime highs averaged 25.9 °C, night-time lows 20.9 °C. The highest value of the past 10 years was 37.7 °C (4 Jan 2020), the lowest 16.8 °C (14 Jan 2018).
How often does it rain in Sydney in January?: On average there were 13.8 rain days (at least 1 mm) with 97.0 mm of precipitation in total.

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Data sources

Weather data: Data obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program
Reanalysis (weather model constrained by observations) on a coarse grid of about 50 km. Values represent a large area and can differ from local conditions, especially on islands, coasts and in mountains. Snow depth is the model value for the grid cell, not the depth on the slopes. No sunshine duration.
Reanalysis (weather model constrained by observations)
Reanalysis values represent a grid cell (approx. 25–50 km) and may differ from local measurements on coasts, islands and in mountains.
Sea temperature: MUR SST data were provided by JPL under support by NASA MEaSUREs program; accessed via NOAA CoastWatch ERDDAP
Daily multi-scale ultra-high resolution (≈ 1 km) analysis of satellite measurements (infrared, microwave) and in-situ data. Represents the foundation temperature below the daily warm surface layer. (Satellite and in-situ analysis)
Place search: Natural Earth (public domain) · GeoNames (CC BY 4.0) / OpenStreetMap (ODbL)