Masterton climate — normals and trends
Masterton (New Zealand) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 11.6 °C and it receives 967 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 (16.1 °C on average) and the coldest is July (7.2 °C). Rainfall peaks in July.
Masterton averages 7 frost days, 0 hot days (≥ 30 °C) and 145 rainy days per year.
Masterton has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.
The number of frost days there went from about 13 to 1 per year over the period.
The hottest day of the period reached 28.0 °C (on 22 January 2008) and the coldest -3.8 °C (on 1 July 1951).
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
MastertonWellington Region
- coords
- -40.96°, 175.66°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
11.6°C
Average daily high
14.9°C
Average daily low
8.1°C
Annual rainfall
967mm
Sunshine / day
9.6h
Mean relative humidity
81%
Average peak wind
23.8km/h
Seasonal range
8.9°C
Frost days (< 0 °C)
7 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
145 d/yr
Annual snowfall
1.0 cm
Average feels-like high
12.8 °C
Average feels-like low
5.4 °C
Average peak gust
45.3 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
14.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.59 · 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
28.0 °C
22 January 2008
Coldest day
-3.8 °C
1 July 1951
Wettest day
112 mm
30 March 1979
Windiest day
68.2 km/h
29 January 1952
Strongest gust
112.7 km/h
3 March 2012
Hottest feels-like
30.5 °C
8 January 2009
Coldest feels-like
-7.7 °C
1 July 1951
Snowiest day
5.7 cm
5 July 2003
Sunniest day
14.8 h
2 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 | 17.5 °C | -2.0 °C | 78 mm | +10 mm |
| Feb | 20.6 °C | +0.8 °C | 14 mm | -51 mm |
| Mar | 18.6 °C | +0.3 °C | 62 mm | -12 mm |
| Apr | 17.5 °C | +1.8 °C | 105 mm | +32 mm |
| May | 14.6 °C | +1.4 °C | 83 mm | +7 mm |
| Jun | 12.1 °C | +1.1 °C | 77 mm | -8 mm |
| Jul | 11.8 °C | +1.5 °C | 92 mm | -4 mm |
| Aug | 11.1 °C | +0.2 °C | 56 mm | -33 mm |
| Sep | 13.4 °C | +0.9 °C | 52 mm | -30 mm |
| Oct | 15.4 °C | +1.2 °C | 107 mm | +17 mm |
| Nov | 18.6 °C | +2.7 °C | 40 mm | -39 mm |
| Dec | 19.1 °C | +1.2 °C | 111 mm | +19 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 Masterton?
Masterton has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 11.6 °C and it receives 967 mm of precipitation per year.
What is the hottest day ever recorded in Masterton?
The hottest day measured in Masterton between 1940 and 2025 was 22 January 2008, reaching 28.0 °C.
What is the coldest day in Masterton?
The coldest day measured in Masterton between 1940 and 2025 was 1 July 1951, at -3.8 °C.
Does it snow in Masterton?
Almost never: Masterton sees virtually no snow, with about 7 frost days per year.
Has the climate of Masterton warmed?
Yes: Masterton warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Masterton?
The wettest day measured in Masterton between 1940 and 2025 was 30 March 1979, with 112 mm of rain in 24 hours.
What was the windiest day in Masterton?
The windiest day measured in Masterton between 1940 and 2025 was 29 January 1952, with winds reaching 68.2 km/h.
What is the warmest month in Masterton?
The warmest month in Masterton is February (16.1 °C on average); the coldest is July (7.2 °C).
How much does it rain in Masterton?
Masterton receives on average 967 mm of precipitation per year, spread over about 145 rainy days.
Is it sunny in Masterton?
Masterton gets on average 9.6 hours of sunshine per day, roughly 3,504 hours per year over 1940-2025.
What is the biggest single-day snowfall in Masterton?
The heaviest 24-hour snowfall measured in Masterton between 1940 and 2025 was 5 July 2003, with 5.7 cm.
Are there tropical nights in Masterton?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Masterton.
What was the most extreme apparent temperature in Masterton?
In Masterton, between 1940 and 2025, the highest apparent temperature reached 30.5 °C on 8 January 2009, and the lowest was -7.7 °C on 1 July 1951.
Compare Masterton with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Masterton