Henderson climate — normals and trends
Henderson (New Zealand) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 15.6 °C and it receives 1,188 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 (19.7 °C on average) and the coldest is July (12.1 °C). Rainfall peaks in July.
Henderson averages 0 frost days, 0 hot days (≥ 30 °C) and 150 rainy days per year.
Henderson has warmed by +1.3 °C between 1940 and 2025, or +0.15 °C per decade. This trend is statistically significant.
The hottest day of the period reached 25.5 °C (on 28 January 2018) and the coldest 3.5 °C (on 2 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
HendersonAuckland
- coords
- -36.88°, 174.62°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.6°C
Average daily high
16.9°C
Average daily low
14.2°C
Annual rainfall
1,188mm
Sunshine / day
10.0h
Mean relative humidity
79%
Average peak wind
27.4km/h
Seasonal range
7.6°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
150 d/yr
Annual snowfall
0.0 cm
Average feels-like high
15.4 °C
Average feels-like low
11.5 °C
Average peak gust
43.2 km/h
Tropical nights (≥ 20 °C)
5 d/yr
Solar radiation
16.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.3 °C
since 1940
+0.2 °C per decade · r² = 0.48 · 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
25.5 °C
28 January 2018
Coldest day
3.5 °C
2 July 1951
Wettest day
102 mm
2 February 1967
Windiest day
73.4 km/h
23 March 1944
Strongest gust
120.2 km/h
23 March 1944
Hottest feels-like
31.1 °C
28 January 1962
Coldest feels-like
-1.8 °C
3 June 1944
Sunniest day
14.5 h
29 December 2024
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 | 20.3 °C | -0.2 °C | 79 mm | +6 mm |
| Feb | 22.2 °C | +1.0 °C | 17 mm | -55 mm |
| Mar | 20.6 °C | +0.5 °C | 30 mm | -50 mm |
| Apr | 20.1 °C | +1.9 °C | 172 mm | +76 mm |
| May | 17.5 °C | +1.4 °C | 117 mm | +7 mm |
| Jun | 15.8 °C | +1.4 °C | 153 mm | +29 mm |
| Jul | 14.8 °C | +1.4 °C | 170 mm | +41 mm |
| Aug | 13.7 °C | +0.3 °C | 100 mm | -24 mm |
| Sep | 15.3 °C | +1.1 °C | 112 mm | +12 mm |
| Oct | 16.9 °C | +1.5 °C | 116 mm | +19 mm |
| Nov | 19.8 °C | +2.8 °C | 140 mm | +52 mm |
| Dec | 20.9 °C | +1.9 °C | 88 mm | -7 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 Henderson?
Henderson has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 15.6 °C and it receives 1,188 mm of precipitation per year.
What is the hottest day ever recorded in Henderson?
The hottest day measured in Henderson between 1940 and 2025 was 28 January 2018, reaching 25.5 °C.
What is the coldest day in Henderson?
The coldest day measured in Henderson between 1940 and 2025 was 2 July 1951, at 3.5 °C.
Does it snow in Henderson?
Almost never: Henderson sees virtually no snow, with about 0 frost days per year.
Has the climate of Henderson warmed?
Yes: Henderson warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Henderson?
The wettest day measured in Henderson between 1940 and 2025 was 2 February 1967, with 102 mm of rain in 24 hours.
What was the windiest day in Henderson?
The windiest day measured in Henderson between 1940 and 2025 was 23 March 1944, with winds reaching 73.4 km/h.
What is the warmest month in Henderson?
The warmest month in Henderson is February (19.7 °C on average); the coldest is July (12.1 °C).
How much does it rain in Henderson?
Henderson receives on average 1,188 mm of precipitation per year, spread over about 150 rainy days.
Is it sunny in Henderson?
Henderson gets on average 10.0 hours of sunshine per day, roughly 3,650 hours per year over 1940-2025.
Are there tropical nights in Henderson?
Yes: Henderson has on average 5 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Henderson?
In Henderson, between 1940 and 2025, the highest apparent temperature reached 31.1 °C on 28 January 1962, and the lowest was -1.8 °C on 3 June 1944.
Compare Henderson with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Henderson