Mosman climate — normals and trends
Mosman (Australia) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 17.7 °C and it receives 892 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is February (21.9 °C on average) and the coldest is July (13.0 °C). Rainfall peaks in June.
Mosman averages 0 frost days, 2 hot days (≥ 30 °C) and 116 rainy days per year.
Mosman has warmed by +1.2 °C between 1940 and 2025, or +0.14 °C per decade. This trend is statistically significant.
The hottest day of the period reached 36.4 °C (on 5 January 1946) and the coldest 4.9 °C (on 17 July 2007).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
MosmanNew South Wales
- coords
- -33.84°, 151.24°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.7°C
Average daily high
20.1°C
Average daily low
15.5°C
Annual rainfall
892mm
Sunshine / day
10.2h
Mean relative humidity
72%
Average peak wind
25.9km/h
Seasonal range
8.9°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
116 d/yr
Annual snowfall
0.0 cm
Average feels-like high
19.3 °C
Average feels-like low
13.5 °C
Average peak gust
40.6 km/h
Tropical nights (≥ 20 °C)
51 d/yr
Solar radiation
16.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.2 °C
since 1940
+0.1 °C per decade · r² = 0.61 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
36.4 °C
5 January 1946
Coldest day
4.9 °C
17 July 2007
Wettest day
153 mm
18 November 1961
Windiest day
72.1 km/h
21 June 1975
Strongest gust
116.6 km/h
25 May 1974
Hottest feels-like
39.0 °C
18 January 2013
Coldest feels-like
-0.3 °C
13 August 1978
Sunniest day
14.0 h
3 January 1940
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 24.0 °C | +0.2 °C | 140 mm | +61 mm |
| Feb | 24.6 °C | +0.9 °C | 62 mm | -31 mm |
| Mar | 24.5 °C | +1.6 °C | 131 mm | +42 mm |
| Apr | 22.5 °C | +1.5 °C | 124 mm | +37 mm |
| May | 19.3 °C | +0.7 °C | 187 mm | +103 mm |
| Jun | 16.4 °C | +0.1 °C | 18 mm | -76 mm |
| Jul | 16.3 °C | +0.5 °C | 119 mm | +65 mm |
| Aug | 16.7 °C | +0.1 °C | 245 mm | +183 mm |
| Sep | 20.7 °C | +2.3 °C | 59 mm | +10 mm |
| Oct | 23.1 °C | +3.3 °C | 27 mm | -37 mm |
| Nov | 23.1 °C | +1.9 °C | 28 mm | -46 mm |
| Dec | 23.7 °C | +1.0 °C | 86 mm | +23 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Mosman?
Mosman has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 17.7 °C and it receives 892 mm of precipitation per year.
What is the hottest day ever recorded in Mosman?
The hottest day measured in Mosman between 1940 and 2025 was 5 January 1946, reaching 36.4 °C.
What is the coldest day in Mosman?
The coldest day measured in Mosman between 1940 and 2025 was 17 July 2007, at 4.9 °C.
Does it snow in Mosman?
Almost never: Mosman sees virtually no snow, with about 0 frost days per year.
Has the climate of Mosman warmed?
Yes: Mosman warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Mosman?
The wettest day measured in Mosman between 1940 and 2025 was 18 November 1961, with 153 mm of rain in 24 hours.
What was the windiest day in Mosman?
The windiest day measured in Mosman between 1940 and 2025 was 21 June 1975, with winds reaching 72.1 km/h.
What is the warmest month in Mosman?
The warmest month in Mosman is February (21.9 °C on average); the coldest is July (13.0 °C).
How much does it rain in Mosman?
Mosman receives on average 892 mm of precipitation per year, spread over about 116 rainy days.
Is it sunny in Mosman?
Mosman gets on average 10.2 hours of sunshine per day, roughly 3,723 hours per year over 1940-2025.
Are there tropical nights in Mosman?
Yes: Mosman has on average 51 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Mosman?
In Mosman, between 1940 and 2025, the highest apparent temperature reached 39.0 °C on 18 January 2013, and the lowest was -0.3 °C on 13 August 1978.
Compare Mosman with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Mosman